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 struct vm_object;
  68
  69 struct cdev {
  70         u_int           si_flags;
  71         __uint64_t      si_inode;
  72         uid_t           si_uid;
  73         gid_t           si_gid;
  74         int             si_perms;
  75         TAILQ_ENTRY(cdev) link;
  76         int             si_uminor;
  77         int             si_umajor;
  78         LIST_ENTRY(cdev)        si_hash;
  79         SLIST_HEAD(, vnode) si_hlist;
  80         char            si_name[SPECNAMELEN + 1];
  81         void            *si_drv1;
  82         void            *si_drv2;
  83         struct dev_ops  *si_ops;        /* device operations vector */
  84         struct dev_ops  *si_bops;       /* backing devops vector */
  85         int             si_iosize_max;  /* maximum I/O size (for physio &al) */
  86         struct sysref   si_sysref;
  87         union {
  88                 struct {
  89                         struct tty *__sit_tty;
  90                 } __si_tty;
  91                 struct {
  92                         struct disk *__sid_disk;
  93                         struct mount *__sid_mountpoint;
  94                         int __sid_bsize_phys; /* min physical block size */
  95                         int __sid_bsize_best; /* optimal block size */
  96                 } __si_disk;
  97         } __si_u;
  98         struct bio_track si_track_read;
  99         struct bio_track si_track_write;
 100         time_t          si_lastread;    /* time_second */
 101         time_t          si_lastwrite;   /* time_second */
 102         struct vm_object *si_object;    /* vm_pager support */
 103 };
 104
 105 #define SI_UNUSED01     0x0001
 106 #define SI_HASHED       0x0002  /* in (maj,min) hash table */
 107 #define SI_OVERRIDE     0x0004  /* override uid, gid, and perms */
 108 #define SI_INTERCEPTED  0x0008  /* device ops was intercepted */
 109 #define SI_DEVFS_LINKED 0x0010
 110 #define SI_REPROBE_TEST 0x0020
 111
 112 #define si_tty          __si_u.__si_tty.__sit_tty
 113 #define si_disk         __si_u.__si_disk.__sid_disk
 114 #define si_mountpoint   __si_u.__si_disk.__sid_mountpoint
 115 #define si_bsize_phys   __si_u.__si_disk.__sid_bsize_phys
 116 #define si_bsize_best   __si_u.__si_disk.__sid_bsize_best
 117
 118 #define CDEVSW_ALL_MINORS       0       /* mask of 0 always matches 0 */
 119
 120 /*
 121  * Special device management
 122  */
 123 #define SPECHSZ 64
 124 #define SPECHASH(rdev)  (((unsigned)(minor(rdev)))%SPECHSZ)
 125
 126 /*
 127  * Definitions of device driver entry switches
 128  */
 129
 130 struct buf;
 131 struct bio;
 132 struct proc;
 133 struct uio;
 134 struct knote;
 135 struct ucred;
 136
 137 struct thread;
 138
 139 typedef int l_open_t (struct cdev *dev, struct tty *tp);
 140 typedef int l_close_t (struct tty *tp, int flag);
 141 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
 142 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag);
 143 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data, int flag,
 144                         struct ucred *cred);
 145 typedef int l_rint_t (int c, struct tty *tp);
 146 typedef int l_start_t (struct tty *tp);
 147 typedef int l_modem_t (struct tty *tp, int flag);
 148
 149 /*
 150  * Line discipline switch table
 151  */
 152 struct linesw {
 153         l_open_t        *l_open;
 154         l_close_t       *l_close;
 155         l_read_t        *l_read;
 156         l_write_t       *l_write;
 157         l_ioctl_t       *l_ioctl;
 158         l_rint_t        *l_rint;
 159         l_start_t       *l_start;
 160         l_modem_t       *l_modem;
 161         u_char          l_hotchar;
 162 };
 163
 164 #ifdef _KERNEL
 165 extern struct linesw linesw[];
 166 extern int nlinesw;
 167
 168 int ldisc_register (int , struct linesw *);
 169 void ldisc_deregister (int);
 170 #define LDISC_LOAD      -1              /* Loadable line discipline */
 171 #endif
 172
 173 /*
 174  * Swap device table
 175  */
 176 struct swdevt {
 177         udev_t  sw_dev;                 /* For quasibogus swapdev reporting */
 178         int     sw_flags;
 179         int     sw_nblks;
 180         struct  vnode *sw_vp;
 181         struct cdev *sw_device;
 182 };
 183 #define SW_FREED        0x01
 184 #define SW_SEQUENTIAL   0x02
 185 #define sw_freed        sw_flags        /* XXX compat */
 186
 187 #ifdef _KERNEL
 188
 189 l_ioctl_t       l_nullioctl;
 190 l_read_t        l_noread;
 191 l_write_t       l_nowrite;
 192
 193 struct module;
 194
 195 struct devsw_module_data {
 196         int     (*chainevh)(struct module *, int, void *); /* next handler */
 197         void    *chainarg;      /* arg for next event handler */
 198         /* Do not initialize fields hereafter */
 199 };
 200
 201 #define DEV_MODULE(name, evh, arg)                                      \
 202 static moduledata_t name##_mod = {                                      \
 203     #name,                                                              \
 204     evh,                                                                \
 205     arg                                                                 \
 206 };                                                                      \
 207 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
 208
 209 int     count_dev (cdev_t dev);
 210 void    destroy_dev (cdev_t dev);
 211 void    release_dev (cdev_t dev);
 212 cdev_t  get_dev (int x, int y);
 213 cdev_t  reference_dev (cdev_t dev);
 214 struct dev_ops *devsw (cdev_t dev);
 215 const char *devtoname (cdev_t dev);
 216 void    freedev (cdev_t dev);
 217 int     iszerodev (cdev_t dev);
 218
 219 int     lminor (cdev_t dev);
 220 void    setconf (void);
 221 cdev_t  kgetdiskbyname(const char *name);
 222 int     dev_is_good(cdev_t dev);
 223
 224 /*
 225  * XXX: This included for when DEVFS resurfaces
 226  */
 227
 228 #define         UID_ROOT        0
 229 #define         UID_BIN         3
 230 #define         UID_UUCP        66
 231
 232 #define         GID_WHEEL       0
 233 #define         GID_KMEM        2
 234 #define         GID_TTY         4
 235 #define         GID_OPERATOR    5
 236 #define         GID_BIN         7
 237 #define         GID_GAMES       13
 238 #define         GID_DIALER      68
 239
 240 #endif /* _KERNEL */
 241 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 242
 243 #endif /* !_SYS_CONF_H_ */