2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
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.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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
40 * @(#)conf.h 8.5 (Berkeley) 1/9/95
48 #include <sys/eventhandler.h>
54 TAILQ_HEAD(snaphead, inode);
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;
71 LIST_ENTRY(cdev) si_hash;
72 SLIST_HEAD(, vnode) si_hlist;
73 LIST_HEAD(, cdev) si_children;
74 LIST_ENTRY(cdev) si_siblings;
78 void *si_drv1, *si_drv2;
79 struct cdevsw *si_devsw;
80 int si_iosize_max; /* maximum I/O size (for physio &al) */
82 u_int si_stripeoffset;
89 struct tty *__sit_tty;
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 *);
101 char __si_namebuf[SPECNAMELEN + 1];
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
114 * Special device management
117 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
120 * Definitions of device driver entry switches
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
141 * Users of struct thread/struct proc that aren't device drivers should
142 * not use d_thread_t.
145 typedef struct thread d_thread_t;
147 typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td);
148 typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td);
149 typedef void d_strategy_t(struct bio *bp);
150 typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data,
151 int fflag, struct thread *td);
153 typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag);
154 typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag);
155 typedef int d_poll_t(dev_t dev, int events, struct thread *td);
156 typedef int d_kqfilter_t(dev_t dev, struct knote *kn);
157 typedef int d_mmap_t(dev_t dev, vm_offset_t offset, vm_paddr_t *paddr,
160 typedef int l_open_t(dev_t dev, struct tty *tp);
161 typedef int l_close_t(struct tty *tp, int flag);
162 typedef int l_read_t(struct tty *tp, struct uio *uio, int flag);
163 typedef int l_write_t(struct tty *tp, struct uio *uio, int flag);
164 typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data,
165 int flag, struct thread *td);
166 typedef int l_rint_t(int c, struct tty *tp);
167 typedef int l_start_t(struct tty *tp);
168 typedef int l_modem_t(struct tty *tp, int flag);
170 typedef int dumper_t(
171 void *priv, /* Private to the driver. */
172 void *virtual, /* Virtual (mapped) address. */
173 vm_offset_t physical, /* Physical address of virtual. */
174 off_t offset, /* Byte-offset to write at. */
175 size_t length); /* Number of bytes to dump. */
177 #define BIO_STRATEGY(bp) \
179 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \
180 Debugger("bio_cmd botch"); \
181 (*devsw((bp)->bio_dev)->d_strategy)(bp); \
184 #define DEV_STRATEGY(bp) \
186 if ((bp)->b_flags & B_PHYS) \
187 (bp)->b_io.bio_offset = (bp)->b_offset; \
189 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \
190 (bp)->b_io.bio_done = bufdonebio; \
191 (bp)->b_io.bio_caller2 = (bp); \
192 BIO_STRATEGY(&(bp)->b_io); \
200 #define D_TAPE 0x0001
201 #define D_DISK 0x0002
207 #define D_TYPEMASK 0xffff
212 #define D_MEMDISK 0x00010000 /* memory type disk */
213 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */
214 #define D_TRACKCLOSE 0x00080000 /* track all closes */
215 #define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
216 #define D_NOGIANT 0x00400000 /* Doesn't want Giant */
219 * Character device switch table
232 d_strategy_t *d_strategy;
234 d_kqfilter_t *d_kqfilter;
238 * Line discipline switch table
252 extern struct linesw linesw[];
255 int ldisc_register(int , struct linesw *);
256 void ldisc_deregister(int);
257 #define LDISC_LOAD -1 /* Loadable line discipline */
262 #define NUMCDEVSW 256
265 * XXX: do not use MAJOR_AUTO unless you have no choice. In general drivers
266 * should just not initialize .d_maj and that will DTRT.
268 #define MAJOR_AUTO 0 /* XXX: Not GM */
270 l_ioctl_t l_nullioctl;
276 struct devsw_module_data {
277 int (*chainevh)(struct module *, int, void *); /* next handler */
278 void *chainarg; /* arg for next event handler */
279 /* Do not initialize fields hereafter */
282 #define DEV_MODULE(name, evh, arg) \
283 static moduledata_t name##_mod = { \
288 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
291 int count_dev(dev_t _dev);
292 void destroy_dev(dev_t _dev);
293 struct cdevsw *devsw(dev_t _dev);
294 const char *devtoname(dev_t _dev);
295 int dev_named(dev_t _pdev, const char *_name);
296 void dev_depends(dev_t _pdev, dev_t _cdev);
297 void freedev(dev_t _dev);
298 dev_t makebdev(int _maj, int _min);
299 dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid,
300 int _perms, const char *_fmt, ...) __printflike(6, 7);
301 dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3);
302 int dev2unit(dev_t _dev);
303 int unit2minor(int _unit);
305 dev_t getdiskbyname(char *_name);
307 void devfs_create(dev_t dev);
308 void devfs_destroy(dev_t dev);
316 #define GID_OPERATOR 5
319 #define GID_DIALER 68
321 typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result);
323 int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit);
324 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
326 /* Stuff relating to kernel-dump */
329 dumper_t *dumper; /* Dumping function. */
330 void *priv; /* Private parts. */
331 u_int blocksize; /* Size of block in bytes. */
332 off_t mediaoffset; /* Initial offset in bytes. */
333 off_t mediasize; /* Space available in bytes. */
336 int set_dumper(struct dumperinfo *);
337 void dumpsys(struct dumperinfo *);
338 extern int dumping; /* system is dumping */
342 #endif /* !_SYS_CONF_H_ */