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 #ifndef _SYS_EVENT_H_
  61 #include <sys/event.h>
  62 #endif
  63 #include <libprop/proplib.h>
  64
  65 #define SPECNAMELEN     63
  66
  67 struct tty;
  68 struct disk;
  69 struct vnode;
  70 struct dev_ops;
  71 struct vm_object;
  72
  73 struct cdev {
  74         u_int           si_flags;
  75         __uint64_t      si_inode;
  76         uid_t           si_uid;
  77         gid_t           si_gid;
  78         int             si_perms;
  79         TAILQ_ENTRY(cdev) link;
  80         int             si_uminor;
  81         int             si_umajor;
  82         struct cdev     *si_parent;
  83         LIST_ENTRY(cdev)        si_hash;
  84         SLIST_HEAD(, vnode) si_hlist;
  85         char            si_name[SPECNAMELEN + 1];
  86         void            *si_drv1;
  87         void            *si_drv2;
  88         struct dev_ops  *si_ops;        /* device operations vector */
  89         struct dev_ops  *si_bops;       /* backing devops vector */
  90         int             si_iosize_max;  /* maximum I/O size (for physio &al) */
  91         struct sysref   si_sysref;
  92         union {
  93                 struct {
  94                         struct tty *__sit_tty;
  95                 } __si_tty;
  96                 struct {
  97                         struct disk *__sid_disk;
  98                         struct mount *__sid_mountpoint;
  99                         int __sid_bsize_phys; /* min physical block size */
 100                         int __sid_bsize_best; /* optimal block size */
 101                 } __si_disk;
 102         } __si_u;
 103         struct bio_track si_track_read;
 104         struct bio_track si_track_write;
 105         time_t          si_lastread;    /* time_uptime */
 106         time_t          si_lastwrite;   /* time_uptime */
 107         struct vm_object *si_object;    /* vm_pager support */
 108         prop_dictionary_t si_dict;
 109         struct kqinfo   si_kqinfo;      /* degenerate delegated knotes */
 110 };
 111
 112 #define SI_UNUSED01     0x0001
 113 #define SI_HASHED       0x0002  /* in (maj,min) hash table */
 114 #define SI_OVERRIDE     0x0004  /* override uid, gid, and perms */
 115 #define SI_INTERCEPTED  0x0008  /* device ops was intercepted */
 116 #define SI_DEVFS_LINKED 0x0010
 117 #define SI_REPROBE_TEST 0x0020
 118 #define SI_CANFREE      0x0040  /* basically just a propagated D_CANFREE */
 119
 120 #define si_tty          __si_u.__si_tty.__sit_tty
 121 #define si_disk         __si_u.__si_disk.__sid_disk
 122 #define si_mountpoint   __si_u.__si_disk.__sid_mountpoint
 123 #define si_bsize_phys   __si_u.__si_disk.__sid_bsize_phys
 124 #define si_bsize_best   __si_u.__si_disk.__sid_bsize_best
 125
 126 #define CDEVSW_ALL_MINORS       0       /* mask of 0 always matches 0 */
 127
 128 /*
 129  * Special device management
 130  */
 131 #define SPECHSZ 64
 132 #define SPECHASH(rdev)  (((unsigned)(minor(rdev)))%SPECHSZ)
 133
 134 /*
 135  * Definitions of device driver entry switches
 136  */
 137
 138 struct buf;
 139 struct bio;
 140 struct proc;
 141 struct uio;
 142 struct knote;
 143 struct ucred;
 144
 145 struct thread;
 146
 147 typedef int l_open_t (struct cdev *dev, struct tty *tp);
 148 typedef int l_close_t (struct tty *tp, int flag);
 149 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
 150 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag);
 151 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data, int flag,
 152                         struct ucred *cred);
 153 typedef int l_rint_t (int c, struct tty *tp);
 154 typedef int l_start_t (struct tty *tp);
 155 typedef int l_modem_t (struct tty *tp, int flag);
 156
 157 /*
 158  * Line discipline switch table
 159  */
 160 struct linesw {
 161         l_open_t        *l_open;
 162         l_close_t       *l_close;
 163         l_read_t        *l_read;
 164         l_write_t       *l_write;
 165         l_ioctl_t       *l_ioctl;
 166         l_rint_t        *l_rint;
 167         l_start_t       *l_start;
 168         l_modem_t       *l_modem;
 169         u_char          l_hotchar;
 170 };
 171
 172 #ifdef _KERNEL
 173 extern struct linesw linesw[];
 174 extern int nlinesw;
 175
 176 int ldisc_register (int , struct linesw *);
 177 void ldisc_deregister (int);
 178 #define LDISC_LOAD      -1              /* Loadable line discipline */
 179 #endif
 180
 181 /*
 182  * Swap device table
 183  */
 184 struct swdevt {
 185         udev_t  sw_dev;                 /* For quasibogus swapdev reporting */
 186         int     sw_flags;
 187         int     sw_nblks;               /* Number of swap blocks on device */
 188         int     sw_nused;               /* swap blocks used on device */
 189         struct  vnode *sw_vp;
 190         struct cdev *sw_device;
 191 };
 192
 193 #define SW_FREED        0x01
 194 #define SW_SEQUENTIAL   0x02
 195 #define SW_CLOSING      0x04
 196 #define sw_freed        sw_flags        /* XXX compat */
 197
 198 #ifdef _KERNEL
 199
 200 l_ioctl_t       l_nullioctl;
 201 l_read_t        l_noread;
 202 l_write_t       l_nowrite;
 203
 204 struct module;
 205
 206 struct devsw_module_data {
 207         int     (*chainevh)(struct module *, int, void *); /* next handler */
 208         void    *chainarg;      /* arg for next event handler */
 209         /* Do not initialize fields hereafter */
 210 };
 211
 212 #define DEV_MODULE(name, evh, arg)                                      \
 213 static moduledata_t name##_mod = {                                      \
 214     #name,                                                              \
 215     evh,                                                                \
 216     arg                                                                 \
 217 };                                                                      \
 218 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
 219
 220 #define dev2unit(x)     ((minor(x) & 0xff) | (minor(x) >> 8))
 221
 222 int     count_dev (cdev_t dev);
 223 void    destroy_dev (cdev_t dev);
 224 void    release_dev (cdev_t dev);
 225 cdev_t  get_dev (int x, int y);
 226 cdev_t  reference_dev (cdev_t dev);
 227 struct dev_ops *devsw (cdev_t dev);
 228 const char *devtoname (cdev_t dev);
 229 void    freedev (cdev_t dev);
 230 int     iszerodev (cdev_t dev);
 231
 232 int     lminor (cdev_t dev);
 233 void    setconf (void);
 234 cdev_t  kgetdiskbyname(const char *name);
 235 int     dev_is_good(cdev_t dev);
 236
 237 /*
 238  * XXX: This included for when DEVFS resurfaces
 239  */
 240
 241 #define         UID_ROOT        0
 242 #define         UID_BIN         3
 243 #define         UID_UUCP        66
 244
 245 #define         GID_WHEEL       0
 246 #define         GID_KMEM        2
 247 #define         GID_TTY         4
 248 #define         GID_OPERATOR    5
 249 #define         GID_BIN         7
 250 #define         GID_GAMES       13
 251 #define         GID_DIALER      68
 252
 253 #endif /* _KERNEL */
 254 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 255
 256 #endif /* !_SYS_CONF_H_ */