2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
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11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
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29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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38 * @(#)conf.h 8.5 (Berkeley) 1/9/95
45 #include <sys/queue.h>
47 #define SPECNAMELEN 15
55 #define SI_STASHED 0x0001 /* created in stashed storage */
57 LIST_ENTRY(specinfo) si_hash;
58 SLIST_HEAD(, vnode) si_hlist;
59 char si_name[SPECNAMELEN + 1];
60 void *si_drv1, *si_drv2;
61 struct cdevsw *si_devsw;
62 void *si_devfs; /* save cookie for devfs operations */
63 void *si_bdevfs; /* XXX block device (should go away) */
64 int si_iosize_max; /* maximum I/O size (for physio &al) */
67 struct tty *__sit_tty;
70 struct disk *__sid_disk;
71 struct mount *__sid_mountpoint;
72 int __sid_bsize_phys; /* min physical block size */
73 int __sid_bsize_best; /* optimal block size */
78 #define si_tty __si_u.__si_tty.__sit_tty
79 #define si_disk __si_u.__si_disk.__sid_disk
80 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
81 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
82 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
87 #define v_hashchain v_rdev->si_hlist
88 #define v_specmountpoint v_rdev->si_mountpoint
91 * Special device management
94 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
97 * Definitions of device driver entry switches
104 typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p));
105 typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p));
106 typedef void d_strategy_t __P((struct buf *bp));
107 typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl));
108 typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
109 int fflag, struct proc *p));
110 typedef int d_dump_t __P((dev_t dev));
111 typedef int d_psize_t __P((dev_t dev));
113 typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag));
114 typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag));
115 typedef int d_poll_t __P((dev_t dev, int events, struct proc *p));
116 typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot));
118 typedef int l_open_t __P((dev_t dev, struct tty *tp));
119 typedef int l_close_t __P((struct tty *tp, int flag));
120 typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag));
121 typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag));
122 typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data,
123 int flag, struct proc *p));
124 typedef int l_rint_t __P((int c, struct tty *tp));
125 typedef int l_start_t __P((struct tty *tp));
126 typedef int l_modem_t __P((struct tty *tp, int flag));
128 /* This is type of the function DEVFS uses to hook into the kernel with */
129 typedef void devfs_create_t __P((dev_t dev, uid_t uid, gid_t gid, int perms));
130 typedef void devfs_remove_t __P((dev_t dev));
133 * XXX: The dummy argument can be used to do what strategy1() never
134 * did anywhere: Create a per device flag to lock the device during
135 * label/slice surgery, all calls with a dummy == 0 gets stalled on
136 * a queue somewhere, whereas dummy == 1 are let through. Once out
137 * of surgery, reset the flag and restart all the stuff on the stall
140 #define BUF_STRATEGY(bp, dummy) (*devsw((bp)->b_dev)->d_strategy)(bp)
144 #define D_TAPE 0x0001
145 #define D_DISK 0x0002
149 #define D_TYPEMASK 0xffff
154 #define D_MEMDISK 0x10000 /* memory type disk */
155 #define D_NAGGED 0x20000 /* nagged about missing make_dev() */
156 #define D_CANFREE 0x40000 /* can free blocks */
157 #define D_TRACKCLOSE 0x80000 /* track all closes */
160 * Character device switch table
170 d_strategy_t *d_strategy;
171 const char *d_name; /* base device name, e.g. 'vn' */
180 * Line discipline switch table
195 extern struct linesw linesw[];
198 int ldisc_register __P((int , struct linesw *));
199 void ldisc_deregister __P((int));
200 #define LDISC_LOAD -1 /* Loadable line discipline */
207 udev_t sw_dev; /* For quasibogus swapdev reporting */
213 #define SW_FREED 0x01
214 #define SW_SEQUENTIAL 0x02
215 #define sw_freed sw_flags /* XXX compat */
224 #define nostrategy ((d_strategy_t *)NULL)
225 #define nopoll seltrue
229 #define NUMCDEVSW 256
232 * nopsize is little used, so not worth having dummy functions for.
234 #define nopsize ((d_psize_t *)NULL)
244 struct devsw_module_data {
245 int (*chainevh)(struct module *, int, void *); /* next handler */
246 void *chainarg; /* arg for next event handler */
247 /* Do not initialize fields hereafter */
250 #define DEV_MODULE(name, evh, arg) \
251 static moduledata_t name##_mod = { \
256 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
259 int cdevsw_add __P((struct cdevsw *new));
260 int cdevsw_remove __P((struct cdevsw *old));
261 void destroy_dev __P((dev_t dev));
262 struct cdevsw *devsw __P((dev_t dev));
263 const char *devtoname __P((dev_t dev));
264 void freedev __P((dev_t dev));
265 int iszerodev __P((dev_t dev));
266 dev_t makebdev __P((int maj, int min));
267 dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, char *fmt, ...)) __printflike(6, 7);
268 int lminor __P((dev_t dev));
269 void setconf __P((void));
271 extern devfs_create_t *devfs_create_hook;
274 * XXX: This included for when DEVFS resurfaces
283 #define GID_OPERATOR 5
286 #define GID_DIALER 68
290 #endif /* !_SYS_CONF_H_ */