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.
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34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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40 * @(#)conf.h 8.5 (Berkeley) 1/9/95
47 #include <sys/queue.h>
48 #include <sys/eventhandler.h>
56 #define SI_STASHED 0x0001 /* created in stashed storage */
57 #define SI_ALIAS 0x0002 /* carrier of alias name */
58 #define SI_NAMED 0x0004 /* make_dev{_alias} has been called */
59 #define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */
60 struct timespec si_atime;
61 struct timespec si_ctime;
62 struct timespec si_mtime;
64 LIST_ENTRY(specinfo) si_hash;
65 SLIST_HEAD(, vnode) si_hlist;
66 LIST_HEAD(, specinfo) si_names;
68 char si_name[SPECNAMELEN + 1];
69 void *si_drv1, *si_drv2;
70 struct cdevsw *si_devsw;
71 int si_iosize_max; /* maximum I/O size (for physio &al) */
77 struct tty *__sit_tty;
80 struct disk *__sid_disk;
81 struct mount *__sid_mountpoint;
82 int __sid_bsize_phys; /* min physical block size */
83 int __sid_bsize_best; /* optimal block size */
88 #define si_tty __si_u.__si_tty.__sit_tty
89 #define si_disk __si_u.__si_disk.__sid_disk
90 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
91 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
92 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
95 * Special device management
98 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
101 * Definitions of device driver entry switches
109 typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p));
110 typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p));
111 typedef void d_strategy_t __P((struct bio *bp));
112 typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl));
113 typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
114 int fflag, struct proc *p));
115 typedef int d_dump_t __P((dev_t dev));
116 typedef int d_psize_t __P((dev_t dev));
118 typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag));
119 typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag));
120 typedef int d_poll_t __P((dev_t dev, int events, struct proc *p));
121 typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot));
123 typedef int l_open_t __P((dev_t dev, struct tty *tp));
124 typedef int l_close_t __P((struct tty *tp, int flag));
125 typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag));
126 typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag));
127 typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data,
128 int flag, struct proc *p));
129 typedef int l_rint_t __P((int c, struct tty *tp));
130 typedef int l_start_t __P((struct tty *tp));
131 typedef int l_modem_t __P((struct tty *tp, int flag));
134 * XXX: The dummy argument can be used to do what strategy1() never
135 * did anywhere: Create a per device flag to lock the device during
136 * label/slice surgery, all calls with a dummy == 0 gets stalled on
137 * a queue somewhere, whereas dummy == 1 are let through. Once out
138 * of surgery, reset the flag and restart all the stuff on the stall
141 #define BIO_STRATEGY(bp, dummy) \
143 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \
144 Debugger("bio_cmd botch"); \
145 (*devsw((bp)->bio_dev)->d_strategy)(bp); \
148 #define DEV_STRATEGY(bp, dummy) \
150 if ((bp)->b_flags & B_PHYS) \
151 (bp)->b_io.bio_offset = (bp)->b_offset; \
153 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \
154 (bp)->b_io.bio_done = bufdonebio; \
155 (bp)->b_io.bio_caller2 = (bp); \
156 BIO_STRATEGY(&(bp)->b_io, dummy); \
162 #define D_TAPE 0x0001
163 #define D_DISK 0x0002
167 #define D_TYPEMASK 0xffff
172 #define D_MEMDISK 0x10000 /* memory type disk */
173 #define D_NAGGED 0x20000 /* nagged about missing make_dev() */
174 #define D_CANFREE 0x40000 /* can free blocks */
175 #define D_TRACKCLOSE 0x80000 /* track all closes */
176 #define D_MMAP_ANON 0x100000 /* special treatment in vm_mmap.c */
179 * Character device switch table
189 d_strategy_t *d_strategy;
190 const char *d_name; /* base device name, e.g. 'vn' */
195 /* This following field is deprecated. Please don't initialize */
200 * Line discipline switch table
215 extern struct linesw linesw[];
218 int ldisc_register __P((int , struct linesw *));
219 void ldisc_deregister __P((int));
220 #define LDISC_LOAD -1 /* Loadable line discipline */
227 udev_t sw_dev; /* For quasibogus swapdev reporting */
233 #define SW_FREED 0x01
234 #define SW_SEQUENTIAL 0x02
235 #define sw_freed sw_flags /* XXX compat */
244 #define nostrategy ((d_strategy_t *)NULL)
245 #define nopoll seltrue
249 #define NUMCDEVSW 256
252 * nopsize is little used, so not worth having dummy functions for.
254 #define nopsize ((d_psize_t *)NULL)
264 struct devsw_module_data {
265 int (*chainevh)(struct module *, int, void *); /* next handler */
266 void *chainarg; /* arg for next event handler */
267 /* Do not initialize fields hereafter */
270 #define DEV_MODULE(name, evh, arg) \
271 static moduledata_t name##_mod = { \
276 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
279 int cdevsw_add __P((struct cdevsw *new));
280 int cdevsw_remove __P((struct cdevsw *old));
281 int count_dev __P((dev_t dev));
282 void destroy_dev __P((dev_t dev));
283 struct cdevsw *devsw __P((dev_t dev));
284 const char *devtoname __P((dev_t dev));
285 void freedev __P((dev_t dev));
286 int iszerodev __P((dev_t dev));
287 dev_t makebdev __P((int maj, int min));
288 dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, char *fmt, ...)) __printflike(6, 7);
289 dev_t make_dev_alias __P((dev_t pdev, char *fmt, ...)) __printflike(2, 3);
290 int dev2unit __P((dev_t dev));
291 int unit2minor __P((int unit));
292 void setconf __P((void));
293 dev_t getdiskbyname(char *name);
295 /* This is type of the function DEVFS uses to hook into the kernel with */
296 typedef void devfs_create_t __P((dev_t dev));
297 typedef void devfs_destroy_t __P((dev_t dev));
299 extern devfs_create_t *devfs_create_hook;
300 extern devfs_destroy_t *devfs_destroy_hook;
301 extern int devfs_present;
304 * XXX: This included for when DEVFS resurfaces
313 #define GID_OPERATOR 5
316 #define GID_DIALER 68
318 typedef void (*dev_clone_fn) __P((void *arg, char *name, int namelen, dev_t *result));
320 int dev_stdclone __P((char *name, char **namep, char *stem, int *unit));
321 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
324 #endif /* !_SYS_CONF_H_ */