The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/conf.h

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    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 1.48.2.3 1999/11/15 22:40:48 joe Exp $
   40  */
   41 
   42 #ifndef _SYS_CONF_H_
   43 #define _SYS_CONF_H_
   44 
   45 /*
   46  * Definitions of device driver entry switches
   47  */
   48 
   49 struct buf;
   50 struct proc;
   51 struct tty;
   52 struct uio;
   53 struct vnode;
   54 
   55 typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p));
   56 typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p));
   57 typedef void d_strategy_t __P((struct buf *bp));
   58 typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
   59                            int fflag, struct proc *p));
   60 typedef int d_dump_t __P((dev_t dev));
   61 typedef int d_psize_t __P((dev_t dev));
   62 
   63 typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag));
   64 typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag));
   65 typedef void d_stop_t __P((struct tty *tp, int rw));
   66 typedef int d_reset_t __P((dev_t dev));
   67 typedef struct tty *d_devtotty_t __P((dev_t dev));
   68 typedef int d_poll_t __P((dev_t dev, int events, struct proc *p));
   69 typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot));
   70 
   71 typedef int l_open_t __P((dev_t dev, struct tty *tp));
   72 typedef int l_close_t __P((struct tty *tp, int flag));
   73 typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag));
   74 typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag));
   75 typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data,
   76                            int flag, struct proc *p));
   77 typedef int l_rint_t __P((int c, struct tty *tp));
   78 typedef int l_start_t __P((struct tty *tp));
   79 typedef int l_modem_t __P((struct tty *tp, int flag));
   80 
   81 /*
   82  * Types for d_type.
   83  */
   84 #define D_TAPE  1
   85 #define D_DISK  2
   86 #define D_TTY   3
   87 
   88 #define D_TYPEMASK      0xffff
   89 
   90 /*
   91  * Flags for d_flags.
   92  */
   93 #define D_NOCLUSTERR    0x10000         /* disables cluter read */
   94 #define D_NOCLUSTERW    0x20000         /* disables cluster write */
   95 #define D_NOCLUSTERRW   (D_NOCLUSTERR | D_NOCLUSTERW)
   96 #define D_CANFREE       0x40000         /* can free blocks */
   97 
   98 
   99 /*
  100  * Character device switch table
  101  */
  102 struct cdevsw {
  103         d_open_t        *d_open;
  104         d_close_t       *d_close;
  105         d_read_t        *d_read;
  106         d_write_t       *d_write;
  107         d_ioctl_t       *d_ioctl;
  108         d_stop_t        *d_stop;
  109         d_reset_t       *d_reset;       /* XXX not used */
  110         d_devtotty_t    *d_devtotty;
  111         d_poll_t        *d_poll;
  112         d_mmap_t        *d_mmap;
  113         d_strategy_t    *d_strategy;
  114         char            *d_name;        /* see above */
  115         void            *d_spare;
  116         int             d_maj;
  117         d_dump_t        *d_dump;
  118         d_psize_t       *d_psize;
  119         u_int           d_flags;
  120         int             d_maxio;
  121         int             d_bmaj;
  122 };
  123 
  124 #ifdef KERNEL
  125 extern struct cdevsw *bdevsw[];
  126 extern struct cdevsw *cdevsw[];
  127 #endif
  128 
  129 /*
  130  * Line discipline switch table
  131  */
  132 struct linesw {
  133         l_open_t        *l_open;
  134         l_close_t       *l_close;
  135         l_read_t        *l_read;
  136         l_write_t       *l_write;
  137         l_ioctl_t       *l_ioctl;
  138         l_rint_t        *l_rint;
  139         l_start_t       *l_start;
  140         l_modem_t       *l_modem;
  141         u_char          l_hotchar;
  142 };
  143 
  144 #ifdef KERNEL
  145 extern struct linesw linesw[];
  146 extern int nlinesw;
  147 
  148 int ldisc_register __P((int , struct linesw *));
  149 void ldisc_deregister __P((int));
  150 #define LDISC_LOAD      -1              /* Loadable line discipline */
  151 #endif
  152 
  153 /*
  154  * Swap device table
  155  */
  156 struct swdevt {
  157         dev_t   sw_dev;
  158         int     sw_flags;
  159         int     sw_nblks;
  160         struct  vnode *sw_vp;
  161 };
  162 #define SW_FREED        0x01
  163 #define SW_SEQUENTIAL   0x02
  164 #define sw_freed        sw_flags        /* XXX compat */
  165 
  166 #ifdef KERNEL
  167 d_open_t        noopen;
  168 d_close_t       noclose;
  169 d_read_t        noread;
  170 d_write_t       nowrite;
  171 d_ioctl_t       noioctl;
  172 d_stop_t        nostop;
  173 d_reset_t       noreset;
  174 d_devtotty_t    nodevtotty;
  175 d_mmap_t        nommap;
  176 
  177 /* Bogus defines for compatibility. */
  178 #define noioc           noioctl
  179 #define nostrat         nostrategy
  180 #define zerosize        nopsize
  181 /*
  182  * XXX d_strategy seems to be unused for cdevs that aren't associated with
  183  * bdevs and called without checking for it being non-NULL for bdevs.
  184  */
  185 #define nostrategy      ((d_strategy_t *)NULL)
  186 
  187 d_dump_t        nodump;
  188 
  189 /*
  190  * nopsize is little used, so not worth having dummy functions for.
  191  */
  192 #define nopsize ((d_psize_t *)NULL)
  193 
  194 d_open_t        nullopen;
  195 d_close_t       nullclose;
  196 #define nullstop nostop         /* one void return is as good as another */
  197 #define nullreset noreset       /* one unused function is as good as another */
  198 
  199 l_read_t        l_noread;
  200 l_write_t       l_nowrite;
  201 
  202 struct module;
  203 
  204 struct cdevsw_module_data {
  205         int     (*chainevh)(struct module *, int, void *); /* next handler */
  206         void    *chainarg;      /* arg for next event handler */
  207         dev_t   dev;            /* device major to use */
  208         struct  cdevsw *cdevsw; /* device functions */
  209 };
  210 
  211 struct bdevsw_module_data {
  212         int     (*chainevh)(struct module *, int, void *); /* next handler */
  213         void    *chainarg;      /* arg for next event handler */
  214         int     bdev;           /* device major to use */
  215         int     cdev;           /* device major to use */
  216         struct  cdevsw *cdevsw; /* device functions */
  217 };
  218 
  219 #define CDEV_MODULE(name, major, devsw, evh, arg)                       \
  220 static struct cdevsw_module_data name##_cdevsw_mod = {                  \
  221     evh, arg, major == NODEV ? NODEV : makedev(major, 0), &devsw        \
  222 };                                                                      \
  223                                                                         \
  224 static moduledata_t name##_mod = {                                      \
  225     #name,                                                              \
  226     cdevsw_module_handler,                                              \
  227     &name##_cdevsw_mod                                                  \
  228 };                                                                      \
  229 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+major)
  230 
  231 #define BDEV_MODULE(name, bdev, cdev, devsw, evh, arg)                  \
  232 static struct bdevsw_module_data name##_bdevsw_mod = {                  \
  233     evh, arg, bdev == NODEV ? NODEV : makedev(bdev, 0),                 \
  234     cdev == NODEV ? NODEV :  makedev(cdev, 0), &devsw                   \
  235 };                                                                      \
  236                                                                         \
  237 static moduledata_t name##_mod = {                                      \
  238     #name,                                                              \
  239     bdevsw_module_handler,                                              \
  240     &name##_bdevsw_mod                                                  \
  241 };                                                                      \
  242 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+cdev)
  243 
  244 int     cdevsw_module_handler __P((struct module *mod, int what, void *arg));
  245 int     bdevsw_module_handler __P((struct module *mod, int what, void *arg));
  246 
  247 int     cdevsw_add __P((dev_t *descrip,struct cdevsw *new,struct cdevsw **old));
  248 void    cdevsw_add_generic __P((int bdev, int cdev, struct cdevsw *cdevsw));
  249 dev_t   chrtoblk __P((dev_t dev));
  250 int     iskmemdev __P((dev_t dev));
  251 int     iszerodev __P((dev_t dev));
  252 void    setconf __P((void));
  253 
  254 /*
  255  * XXX: This included for when DEVFS resurfaces 
  256  */
  257 
  258 #define         UID_ROOT        0
  259 #define         UID_BIN         3
  260 #define         UID_UUCP        66
  261 
  262 #define         GID_WHEEL       0
  263 #define         GID_KMEM        2
  264 #define         GID_OPERATOR    5
  265 #define         GID_BIN         7
  266 #define         GID_GAMES       13
  267 #define         GID_DIALER      68
  268 
  269 #endif /* KERNEL */
  270 
  271 #endif /* !_SYS_CONF_H_ */

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