FreeBSD/Linux Kernel Cross Reference
sys/sys/conf.h
1 /*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2000
5 * Poul-Henning Kamp. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)conf.h 8.5 (Berkeley) 1/9/95
41 * $FreeBSD: releng/5.2/sys/sys/conf.h 121188 2003-10-18 09:03:15Z phk $
42 */
43
44 #ifndef _SYS_CONF_H_
45 #define _SYS_CONF_H_
46
47 #ifdef _KERNEL
48 #include <sys/eventhandler.h>
49
50 struct tty;
51 struct disk;
52 struct vnode;
53 struct buf;
54 TAILQ_HEAD(snaphead, inode);
55
56 struct cdev {
57 u_int si_flags;
58 #define SI_STASHED 0x0001 /* created in stashed storage */
59 #define SI_ALIAS 0x0002 /* carrier of alias name */
60 #define SI_NAMED 0x0004 /* make_dev{_alias} has been called */
61 #define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */
62 #define SI_CHILD 0x0010 /* child of another dev_t */
63 #define SI_DEVOPEN 0x0020 /* opened by device */
64 #define SI_CONSOPEN 0x0040 /* opened by console */
65 #define SI_DUMPDEV 0x0080 /* is kernel dumpdev */
66 #define SI_CANDELETE 0x0100 /* can do BIO_DELETE */
67 struct timespec si_atime;
68 struct timespec si_ctime;
69 struct timespec si_mtime;
70 udev_t si_udev;
71 LIST_ENTRY(cdev) si_hash;
72 SLIST_HEAD(, vnode) si_hlist;
73 LIST_HEAD(, cdev) si_children;
74 LIST_ENTRY(cdev) si_siblings;
75 dev_t si_parent;
76 u_int si_inode;
77 char *si_name;
78 void *si_drv1, *si_drv2;
79 struct cdevsw *si_devsw;
80 int si_iosize_max; /* maximum I/O size (for physio &al) */
81 u_int si_stripesize;
82 u_int si_stripeoffset;
83 uid_t si_uid;
84 gid_t si_gid;
85 mode_t si_mode;
86 u_long si_usecount;
87 union {
88 struct {
89 struct tty *__sit_tty;
90 } __si_tty;
91 struct {
92 struct mount *__sid_mountpoint;
93 int __sid_bsize_phys; /* min physical block size */
94 int __sid_bsize_best; /* optimal block size */
95 struct snaphead __sid_snapshots;
96 daddr_t __sid_snaplistsize; /* size of snapblklist. */
97 daddr_t *__sid_snapblklist; /* known snapshot blocks. */
98 int (*__sid_copyonwrite)(struct vnode *, struct buf *);
99 } __si_disk;
100 } __si_u;
101 char __si_namebuf[SPECNAMELEN + 1];
102 };
103
104 #define si_tty __si_u.__si_tty.__sit_tty
105 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
106 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
107 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
108 #define si_snapshots __si_u.__si_disk.__sid_snapshots
109 #define si_snaplistsize __si_u.__si_disk.__sid_snaplistsize
110 #define si_snapblklist __si_u.__si_disk.__sid_snapblklist
111 #define si_copyonwrite __si_u.__si_disk.__sid_copyonwrite
112
113 /*
114 * Special device management
115 */
116 #define SPECHSZ 64
117 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
118
119 /*
120 * Definitions of device driver entry switches
121 */
122
123 struct bio;
124 struct buf;
125 struct thread;
126 struct uio;
127 struct knote;
128
129 /*
130 * Note: d_thread_t is provided as a transition aid for those drivers
131 * that treat struct proc/struct thread as an opaque data type and
132 * exist in substantially the same form in both 4.x and 5.x. Writers
133 * of drivers that dips into the d_thread_t structure should use
134 * struct thread or struct proc as appropriate for the version of the
135 * OS they are using. It is provided in lieu of each device driver
136 * inventing its own way of doing this. While it does violate style(9)
137 * in a number of ways, this violation is deemed to be less
138 * important than the benefits that a uniform API between releases
139 * gives.
140 *
141 * Users of struct thread/struct proc that aren't device drivers should
142 * not use d_thread_t.
143 */
144
145 typedef struct thread d_thread_t;
146
147 typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td);
148 typedef int d_fdopen_t(dev_t dev, int oflags, struct thread *td, int fdidx);
149 typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td);
150 typedef void d_strategy_t(struct bio *bp);
151 typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data,
152 int fflag, struct thread *td);
153
154 typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag);
155 typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag);
156 typedef int d_poll_t(dev_t dev, int events, struct thread *td);
157 typedef int d_kqfilter_t(dev_t dev, struct knote *kn);
158 typedef int d_mmap_t(dev_t dev, vm_offset_t offset, vm_paddr_t *paddr,
159 int nprot);
160
161 typedef int l_open_t(dev_t dev, struct tty *tp);
162 typedef int l_close_t(struct tty *tp, int flag);
163 typedef int l_read_t(struct tty *tp, struct uio *uio, int flag);
164 typedef int l_write_t(struct tty *tp, struct uio *uio, int flag);
165 typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data,
166 int flag, struct thread *td);
167 typedef int l_rint_t(int c, struct tty *tp);
168 typedef int l_start_t(struct tty *tp);
169 typedef int l_modem_t(struct tty *tp, int flag);
170
171 typedef int dumper_t(
172 void *priv, /* Private to the driver. */
173 void *virtual, /* Virtual (mapped) address. */
174 vm_offset_t physical, /* Physical address of virtual. */
175 off_t offset, /* Byte-offset to write at. */
176 size_t length); /* Number of bytes to dump. */
177
178 #define DEV_STRATEGY(bp) dev_strategy(bp)
179
180 #endif /* _KERNEL */
181
182 /*
183 * Types for d_flags.
184 */
185 #define D_TAPE 0x0001
186 #define D_DISK 0x0002
187 #define D_TTY 0x0004
188 #define D_MEM 0x0008
189
190 #ifdef _KERNEL
191
192 #define D_TYPEMASK 0xffff
193
194 /*
195 * Flags for d_flags.
196 */
197 #define D_MEMDISK 0x00010000 /* memory type disk */
198 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */
199 #define D_TRACKCLOSE 0x00080000 /* track all closes */
200 #define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
201 #define D_NOGIANT 0x00400000 /* Doesn't want Giant */
202
203 /*
204 * Character device switch table
205 */
206 struct cdevsw {
207 int d_maj;
208 u_int d_flags;
209 const char *d_name;
210 d_open_t *d_open;
211 d_fdopen_t *d_fdopen;
212 d_close_t *d_close;
213 d_read_t *d_read;
214 d_write_t *d_write;
215 d_ioctl_t *d_ioctl;
216 d_poll_t *d_poll;
217 d_mmap_t *d_mmap;
218 d_strategy_t *d_strategy;
219 dumper_t *d_dump;
220 d_kqfilter_t *d_kqfilter;
221 };
222
223 /*
224 * Line discipline switch table
225 */
226 struct linesw {
227 l_open_t *l_open;
228 l_close_t *l_close;
229 l_read_t *l_read;
230 l_write_t *l_write;
231 l_ioctl_t *l_ioctl;
232 l_rint_t *l_rint;
233 l_start_t *l_start;
234 l_modem_t *l_modem;
235 u_char l_hotchar;
236 };
237
238 extern struct linesw linesw[];
239 extern int nlinesw;
240
241 int ldisc_register(int , struct linesw *);
242 void ldisc_deregister(int);
243 #define LDISC_LOAD -1 /* Loadable line discipline */
244 #endif /* _KERNEL */
245
246 #ifdef _KERNEL
247
248 #define NUMCDEVSW 256
249
250 /*
251 * XXX: do not use MAJOR_AUTO unless you have no choice. In general drivers
252 * should just not initialize .d_maj and that will DTRT.
253 */
254 #define MAJOR_AUTO 0 /* XXX: Not GM */
255
256 l_ioctl_t l_nullioctl;
257 l_read_t l_noread;
258 l_write_t l_nowrite;
259
260 struct module;
261
262 struct devsw_module_data {
263 int (*chainevh)(struct module *, int, void *); /* next handler */
264 void *chainarg; /* arg for next event handler */
265 /* Do not initialize fields hereafter */
266 };
267
268 #define DEV_MODULE(name, evh, arg) \
269 static moduledata_t name##_mod = { \
270 #name, \
271 evh, \
272 arg \
273 }; \
274 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
275
276
277 int count_dev(dev_t _dev);
278 void destroy_dev(dev_t _dev);
279 struct cdevsw *devsw(dev_t _dev);
280 const char *devtoname(dev_t _dev);
281 int dev_named(dev_t _pdev, const char *_name);
282 void dev_depends(dev_t _pdev, dev_t _cdev);
283 void dev_strategy(struct buf *bp);
284 void freedev(dev_t _dev);
285 dev_t makebdev(int _maj, int _min);
286 dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid,
287 int _perms, const char *_fmt, ...) __printflike(6, 7);
288 dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3);
289 int dev2unit(dev_t _dev);
290 int unit2minor(int _unit);
291 void setconf(void);
292 dev_t getdiskbyname(char *_name);
293
294 void devfs_create(dev_t dev);
295 void devfs_destroy(dev_t dev);
296
297 #define UID_ROOT 0
298 #define UID_BIN 3
299 #define UID_UUCP 66
300
301 #define GID_WHEEL 0
302 #define GID_KMEM 2
303 #define GID_OPERATOR 5
304 #define GID_BIN 7
305 #define GID_GAMES 13
306 #define GID_DIALER 68
307
308 typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result);
309
310 int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit);
311 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
312
313 /* Stuff relating to kernel-dump */
314
315 struct dumperinfo {
316 dumper_t *dumper; /* Dumping function. */
317 void *priv; /* Private parts. */
318 u_int blocksize; /* Size of block in bytes. */
319 off_t mediaoffset; /* Initial offset in bytes. */
320 off_t mediasize; /* Space available in bytes. */
321 };
322
323 int set_dumper(struct dumperinfo *);
324 void dumpsys(struct dumperinfo *);
325 extern int dumping; /* system is dumping */
326
327 #endif /* _KERNEL */
328
329 #endif /* !_SYS_CONF_H_ */
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