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1.1 root 1: /*
2: * Copyright (c) 1982, 1986, 1988 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: * @(#)dev.c 7.4 (Berkeley) 6/29/88
18: */
19:
20: #include "param.h"
21: #include "inode.h"
22: #include "fs.h"
23: #include "saio.h"
24:
25: /*
26: * NB: the value "io->i_ino.i_dev", used to offset the devsw[] array
27: * in the routines below, is munged by the vaxstand Makefile to work
28: * for certain boots.
29: */
30:
31: devread(io)
32: register struct iob *io;
33: {
34: int cc;
35:
36: io->i_flgs |= F_RDDATA;
37: io->i_error = 0;
38: cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, READ);
39: io->i_flgs &= ~F_TYPEMASK;
40: return (cc);
41: }
42:
43: devwrite(io)
44: register struct iob *io;
45: {
46: int cc;
47:
48: io->i_flgs |= F_WRDATA;
49: io->i_error = 0;
50: cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, WRITE);
51: io->i_flgs &= ~F_TYPEMASK;
52: return (cc);
53: }
54:
55: devopen(io)
56: register struct iob *io;
57: {
58: int ret;
59:
60: if (!(ret = (*devsw[io->i_ino.i_dev].dv_open)(io)))
61: return (0);
62: printf("%s(%d,%d,%d,%d): ", devsw[io->i_ino.i_dev].dv_name,
63: io->i_adapt, io->i_ctlr, io->i_unit, io->i_part);
64: switch(ret) {
65: case EIO:
66: break; /* already reported */
67: case EADAPT:
68: printf("bad adaptor number\n");
69: break;
70: case ECTLR:
71: printf("bad controller number\n");
72: break;
73: case EUNIT:
74: printf("bad drive number\n");
75: break;
76: case EPART:
77: printf("bad partition\n");
78: break;
79: case ERDLAB:
80: printf("can't read disk label\n");
81: break;
82: case EUNLAB:
83: printf("unlabeled\n");
84: break;
85: case ENXIO:
86: printf("bad device specification\n");
87: break;
88: default:
89: printf("unknown open error\n");
90: break;
91: }
92: return (ret);
93: }
94:
95: devclose(io)
96: register struct iob *io;
97: {
98: (*devsw[io->i_ino.i_dev].dv_close)(io);
99: }
100:
101: devioctl(io, cmd, arg)
102: register struct iob *io;
103: int cmd;
104: caddr_t arg;
105: {
106: return ((*devsw[io->i_ino.i_dev].dv_ioctl)(io, cmd, arg));
107: }
108:
109: /*ARGSUSED*/
110: nullsys(io)
111: struct iob *io;
112: {}
113:
114: /*ARGSUSED*/
115: nodev(io)
116: struct iob *io;
117: {
118: errno = EBADF;
119: }
120:
121: /*ARGSUSED*/
122: noioctl(io, cmd, arg)
123: struct iob *io;
124: int cmd;
125: caddr_t arg;
126: {
127: return (ECMD);
128: }
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