sys/sys/conf.h

   1 /*-
   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.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  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.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *      @(#)conf.h      8.5 (Berkeley) 1/9/95
  39  * $FreeBSD: src/sys/sys/conf.h,v 1.103.2.6 2002/03/11 01:14:55 dd Exp $
  40  * $DragonFly: src/sys/sys/conf.h,v 1.18 2007/05/09 00:53:35 dillon Exp $
  41  */
  42
  43 #ifndef _SYS_CONF_H_
  44 #define _SYS_CONF_H_
  45
  46 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  47
  48 #ifndef _SYS_QUEUE_H_
  49 #include <sys/queue.h>
  50 #endif
  51 #ifndef _SYS_TIME_H_
  52 #include <sys/time.h>
  53 #endif
  54 #ifndef _SYS_BIOTRACK_H_
  55 #include <sys/biotrack.h>
  56 #endif
  57 #ifndef _SYS_SYSREF_H_
  58 #include <sys/sysref.h>
  59 #endif
  60
  61 #define SPECNAMELEN     15
  62
  63 struct tty;
  64 struct disk;
  65 struct vnode;
  66 struct dev_ops;
  67
  68 struct cdev {
  69         u_int           si_flags;
  70         int             si_uminor;
  71         int             si_umajor;
  72         LIST_ENTRY(cdev)        si_hash;
  73         SLIST_HEAD(, vnode) si_hlist;
  74         char            si_name[SPECNAMELEN + 1];
  75         void            *si_drv1;
  76         void            *si_drv2;
  77         struct dev_ops  *si_ops;        /* device operations vector */
  78         int             si_iosize_max;  /* maximum I/O size (for physio &al) */
  79         struct sysref   si_sysref;
  80         union {
  81                 struct {
  82                         struct tty *__sit_tty;
  83                 } __si_tty;
  84                 struct {
  85                         struct disk *__sid_disk;
  86                         struct mount *__sid_mountpoint;
  87                         int __sid_bsize_phys; /* min physical block size */
  88                         int __sid_bsize_best; /* optimal block size */
  89                 } __si_disk;
  90         } __si_u;
  91         struct bio_track si_track_read;
  92         struct bio_track si_track_write;
  93         time_t          si_lastread;            /* time_second */
  94         time_t          si_lastwrite;           /* time_second */
  95 };
  96
  97 #define SI_UNUSED01     0x0001
  98 #define SI_HASHED       0x0002  /* in (maj,min) hash table */
  99 #define SI_ADHOC        0x0004  /* created via make_adhoc_dev() or udev2dev() */
 100 #define SI_INTERCEPTED  0x0008  /* device ops was intercepted */
 101
 102 #define si_tty          __si_u.__si_tty.__sit_tty
 103 #define si_disk         __si_u.__si_disk.__sid_disk
 104 #define si_mountpoint   __si_u.__si_disk.__sid_mountpoint
 105 #define si_bsize_phys   __si_u.__si_disk.__sid_bsize_phys
 106 #define si_bsize_best   __si_u.__si_disk.__sid_bsize_best
 107
 108 #define CDEVSW_ALL_MINORS       0       /* mask of 0 always matches 0 */
 109
 110 /*
 111  * Special device management
 112  */
 113 #define SPECHSZ 64
 114 #define SPECHASH(rdev)  (((unsigned)(minor(rdev)))%SPECHSZ)
 115
 116 /*
 117  * Definitions of device driver entry switches
 118  */
 119
 120 struct buf;
 121 struct bio;
 122 struct proc;
 123 struct uio;
 124 struct knote;
 125 struct ucred;
 126
 127 struct thread;
 128
 129 typedef int l_open_t (struct cdev *dev, struct tty *tp);
 130 typedef int l_close_t (struct tty *tp, int flag);
 131 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
 132 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag);
 133 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data, int flag,
 134                         struct ucred *cred);
 135 typedef int l_rint_t (int c, struct tty *tp);
 136 typedef int l_start_t (struct tty *tp);
 137 typedef int l_modem_t (struct tty *tp, int flag);
 138
 139 /*
 140  * Line discipline switch table
 141  */
 142 struct linesw {
 143         l_open_t        *l_open;
 144         l_close_t       *l_close;
 145         l_read_t        *l_read;
 146         l_write_t       *l_write;
 147         l_ioctl_t       *l_ioctl;
 148         l_rint_t        *l_rint;
 149         l_start_t       *l_start;
 150         l_modem_t       *l_modem;
 151         u_char          l_hotchar;
 152 };
 153
 154 #ifdef _KERNEL
 155 extern struct linesw linesw[];
 156 extern int nlinesw;
 157
 158 int ldisc_register (int , struct linesw *);
 159 void ldisc_deregister (int);
 160 #define LDISC_LOAD      -1              /* Loadable line discipline */
 161 #endif
 162
 163 /*
 164  * Swap device table
 165  */
 166 struct swdevt {
 167         udev_t  sw_dev;                 /* For quasibogus swapdev reporting */
 168         int     sw_flags;
 169         int     sw_nblks;
 170         struct  vnode *sw_vp;
 171         struct cdev *sw_device;
 172 };
 173 #define SW_FREED        0x01
 174 #define SW_SEQUENTIAL   0x02
 175 #define sw_freed        sw_flags        /* XXX compat */
 176
 177 #ifdef _KERNEL
 178
 179 l_ioctl_t       l_nullioctl;
 180 l_read_t        l_noread;
 181 l_write_t       l_nowrite;
 182
 183 struct module;
 184
 185 struct devsw_module_data {
 186         int     (*chainevh)(struct module *, int, void *); /* next handler */
 187         void    *chainarg;      /* arg for next event handler */
 188         /* Do not initialize fields hereafter */
 189 };
 190
 191 #define DEV_MODULE(name, evh, arg)                                      \
 192 static moduledata_t name##_mod = {                                      \
 193     #name,                                                              \
 194     evh,                                                                \
 195     arg                                                                 \
 196 };                                                                      \
 197 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
 198
 199 int     count_dev (cdev_t dev);
 200 int     count_udev (int x, int y);
 201 void    destroy_dev (cdev_t dev);
 202 void    release_dev (cdev_t dev);
 203 cdev_t  get_dev (int x, int y);
 204 cdev_t  reference_dev (cdev_t dev);
 205 struct dev_ops *devsw (cdev_t dev);
 206 const char *devtoname (cdev_t dev);
 207 void    freedev (cdev_t dev);
 208 int     iszerodev (cdev_t dev);
 209
 210 cdev_t  make_sub_dev (cdev_t dev, int minor);
 211 int     lminor (cdev_t dev);
 212 void    setconf (void);
 213 cdev_t  kgetdiskbyname(const char *name);
 214 int     dev_is_good(cdev_t dev);
 215
 216 /*
 217  * XXX: This included for when DEVFS resurfaces
 218  */
 219
 220 #define         UID_ROOT        0
 221 #define         UID_BIN         3
 222 #define         UID_UUCP        66
 223
 224 #define         GID_WHEEL       0
 225 #define         GID_KMEM        2
 226 #define         GID_OPERATOR    5
 227 #define         GID_BIN         7
 228 #define         GID_GAMES       13
 229 #define         GID_DIALER      68
 230
 231 #endif /* _KERNEL */
 232 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 233
 234 #endif /* !_SYS_CONF_H_ */