FreeBSD/Linux Kernel Cross Reference
sys/kern/subr_xxx.c
1 /*
2 * Copyright (c) 1982, 1986, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)subr_xxx.c 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/kern/subr_xxx.c,v 1.5.4.2 1999/09/05 08:15:16 peter Exp $
35 */
36
37 /*
38 * Miscellaneous trivial functions.
39 */
40 #include <sys/param.h>
41 #include <sys/systm.h>
42
43 /*
44 * Return error for operation not supported
45 * on a specific object or file type.
46 */
47 int
48 eopnotsupp()
49 {
50
51 return (EOPNOTSUPP);
52 }
53
54 /*
55 * Generic null operation, always returns success.
56 */
57 int
58 nullop()
59 {
60
61 return (0);
62 }
63
64 #include <sys/conf.h>
65
66 /*
67 * Unsupported devswitch functions (e.g. for writing to read-only device).
68 * XXX may belong elsewhere.
69 */
70
71 int
72 noopen(dev, flags, fmt, p)
73 dev_t dev;
74 int flags;
75 int fmt;
76 struct proc *p;
77 {
78
79 return (ENODEV);
80 }
81
82 int
83 noclose(dev, flags, fmt, p)
84 dev_t dev;
85 int flags;
86 int fmt;
87 struct proc *p;
88 {
89
90 return (ENODEV);
91 }
92
93 int
94 noread(dev, uio, ioflag)
95 dev_t dev;
96 struct uio *uio;
97 int ioflag;
98 {
99
100 return (ENODEV);
101 }
102
103 int
104 nowrite(dev, uio, ioflag)
105 dev_t dev;
106 struct uio *uio;
107 int ioflag;
108 {
109
110 return (ENODEV);
111 }
112
113 int
114 noioctl(dev, cmd, data, flags, p)
115 dev_t dev;
116 int cmd;
117 caddr_t data;
118 int flags;
119 struct proc *p;
120 {
121
122 return (ENODEV);
123 }
124
125 void
126 nostop(tp, rw)
127 struct tty *tp;
128 int rw;
129 {
130
131 }
132
133 int
134 noreset(dev)
135 dev_t dev;
136 {
137
138 printf("noreset(0x%x) called\n", dev);
139 return (ENODEV);
140 }
141
142 struct tty *
143 nodevtotty(dev)
144 dev_t dev;
145 {
146
147 return (NULL);
148 }
149
150 int
151 noselect(dev, rw, p)
152 dev_t dev;
153 int rw;
154 struct proc *p;
155 {
156
157 /* XXX is this distinguished from 1 for data available? */
158 return (ENODEV);
159 }
160
161 int
162 nommap(dev, offset, nprot)
163 dev_t dev;
164 vm_offset_t offset;
165 int nprot;
166 {
167
168 /* Don't return ENODEV. That would allow mapping address ENODEV! */
169 return (-1);
170 }
171
172 int
173 nodump(dev)
174 dev_t dev;
175 {
176
177 return (ENODEV);
178 }
179
180 /*
181 * Null devswitch functions (for when the operation always succeeds).
182 * XXX may belong elsewhere.
183 * XXX not all are here (e.g., seltrue() isn't).
184 */
185
186 /*
187 * XXX this is probably bogus. Any device that uses it isn't checking the
188 * minor number.
189 */
190 int
191 nullopen(dev, flags, fmt, p)
192 dev_t dev;
193 int flags;
194 int fmt;
195 struct proc *p;
196 {
197
198 return (0);
199 }
200
201 int
202 nullclose(dev, flags, fmt, p)
203 dev_t dev;
204 int flags;
205 int fmt;
206 struct proc *p;
207 {
208
209 return (0);
210 }
211
212 /*
213 * Unconfigured devswitch functions (for unconfigured drivers).
214 * XXX may belong elsewhere.
215 */
216
217 int
218 nxopen(dev, flags, fmt, p)
219 dev_t dev;
220 int flags;
221 int fmt;
222 struct proc *p;
223 {
224
225 return (ENXIO);
226 }
227
228 /*
229 * XXX all nx functions except nxopen() should probably go away. They
230 * probably can't be called for non-open devices.
231 */
232
233 int
234 nxclose(dev, flags, fmt, p)
235 dev_t dev;
236 int flags;
237 int fmt;
238 struct proc *p;
239 {
240
241 printf("nxclose(0x%x) called\n", dev);
242 return (ENXIO);
243 }
244
245 int
246 nxread(dev, uio, ioflag)
247 dev_t dev;
248 struct uio *uio;
249 int ioflag;
250 {
251
252 printf("nxread(0x%x) called\n", dev);
253 return (ENXIO);
254 }
255
256 int
257 nxwrite(dev, uio, ioflag)
258 dev_t dev;
259 struct uio *uio;
260 int ioflag;
261 {
262
263 printf("nxwrite(0x%x) called\n", dev);
264 return (ENXIO);
265 }
266
267 int
268 nxioctl(dev, cmd, data, flags, p)
269 dev_t dev;
270 int cmd;
271 caddr_t data;
272 int flags;
273 struct proc *p;
274 {
275
276 printf("nxioctl(0x%x) called\n", dev);
277 return (ENXIO);
278 }
279
280 int
281 nxselect(dev, rw, p)
282 dev_t dev;
283 int rw;
284 struct proc *p;
285 {
286
287 printf("nxselect(0x%x) called\n", dev);
288
289 /* XXX is this distinguished from 1 for data available? */
290 return (ENXIO);
291 }
292
293 int
294 nxdump(dev)
295 dev_t dev;
296 {
297
298 printf("nxdump(0x%x) called\n", dev);
299 return (ENXIO);
300 }
Cache object: e1178b98efb0bb7ea6e97bcb70472385
|