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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)conf.h      8.5 (Berkeley) 1/9/95
  35  * $FreeBSD: src/sys/sys/conf.h,v 1.103.2.6 2002/03/11 01:14:55 dd Exp $
  36  * $DragonFly: src/sys/sys/conf.h,v 1.18 2007/05/09 00:53:35 dillon Exp $
  37  */
  38
  39 #ifndef _SYS_CONF_H_
  40 #define _SYS_CONF_H_
  41
  42 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  43
  44 #ifndef _SYS_QUEUE_H_
  45 #include <sys/queue.h>
  46 #endif
  47 #ifndef _SYS_TIME_H_
  48 #include <sys/time.h>
  49 #endif
  50 #ifndef _SYS_BIOTRACK_H_
  51 #include <sys/biotrack.h>
  52 #endif
  53 #ifndef _SYS_SYSREF_H_
  54 #include <sys/sysref.h>
  55 #endif
  56 #ifndef _SYS_EVENT_H_
  57 #include <sys/event.h>
  58 #endif
  59 #include <libprop/proplib.h>
  60
  61 #define SPECNAMELEN     63
  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         struct cdev     *si_parent;
  79         LIST_ENTRY(cdev)        si_hash;
  80         SLIST_HEAD(, vnode) si_hlist;
  81         char            si_name[SPECNAMELEN + 1];
  82         void            *si_drv1;
  83         void            *si_drv2;
  84         struct dev_ops  *si_ops;        /* device operations vector */
  85         struct dev_ops  *si_bops;       /* backing devops vector */
  86         int             si_iosize_max;  /* maximum I/O size (for physio &al) */
  87         struct sysref   si_sysref;
  88         union {
  89                 struct {
  90                         struct tty *__sit_tty;
  91                 } __si_tty;
  92                 struct {
  93                         struct disk *__sid_disk;
  94                         struct mount *__sid_mountpoint;
  95                         int __sid_bsize_phys; /* min physical block size */
  96                         int __sid_bsize_best; /* optimal block size */
  97                 } __si_disk;
  98         } __si_u;
  99         struct bio_track si_track_read;
 100         struct bio_track si_track_write;
 101         time_t          si_lastread;    /* time_uptime */
 102         time_t          si_lastwrite;   /* time_uptime */
 103         struct vm_object *si_object;    /* vm_pager support */
 104         prop_dictionary_t si_dict;
 105         struct kqinfo   si_kqinfo;      /* degenerate delegated knotes */
 106 };
 107
 108 #define SI_UNUSED01     0x0001
 109 #define SI_HASHED       0x0002  /* in (maj,min) hash table */
 110 #define SI_OVERRIDE     0x0004  /* override uid, gid, and perms */
 111 #define SI_INTERCEPTED  0x0008  /* device ops was intercepted */
 112 #define SI_DEVFS_LINKED 0x0010
 113 #define SI_REPROBE_TEST 0x0020
 114 #define SI_CANFREE      0x0040  /* basically just a propagated D_CANFREE */
 115
 116 #define si_tty          __si_u.__si_tty.__sit_tty
 117 #define si_disk         __si_u.__si_disk.__sid_disk
 118 #define si_mountpoint   __si_u.__si_disk.__sid_mountpoint
 119 #define si_bsize_phys   __si_u.__si_disk.__sid_bsize_phys
 120 #define si_bsize_best   __si_u.__si_disk.__sid_bsize_best
 121
 122 #define CDEVSW_ALL_MINORS       0       /* mask of 0 always matches 0 */
 123
 124 /*
 125  * Special device management
 126  */
 127 #define SPECHSZ 64
 128 #define SPECHASH(rdev)  (((unsigned)(minor(rdev)))%SPECHSZ)
 129
 130 /*
 131  * Definitions of device driver entry switches
 132  */
 133
 134 struct buf;
 135 struct bio;
 136 struct proc;
 137 struct uio;
 138 struct knote;
 139 struct ucred;
 140
 141 struct thread;
 142
 143 typedef int l_open_t (struct cdev *dev, struct tty *tp);
 144 typedef int l_close_t (struct tty *tp, int flag);
 145 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
 146 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag);
 147 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data, int flag,
 148                         struct ucred *cred);
 149 typedef int l_rint_t (int c, struct tty *tp);
 150 typedef int l_start_t (struct tty *tp);
 151 typedef int l_modem_t (struct tty *tp, int flag);
 152
 153 /*
 154  * Line discipline switch table
 155  */
 156 struct linesw {
 157         l_open_t        *l_open;
 158         l_close_t       *l_close;
 159         l_read_t        *l_read;
 160         l_write_t       *l_write;
 161         l_ioctl_t       *l_ioctl;
 162         l_rint_t        *l_rint;
 163         l_start_t       *l_start;
 164         l_modem_t       *l_modem;
 165         u_char          l_hotchar;
 166 };
 167
 168 #ifdef _KERNEL
 169 extern struct linesw linesw[];
 170 extern int nlinesw;
 171
 172 int ldisc_register (int , struct linesw *);
 173 void ldisc_deregister (int);
 174 #define LDISC_LOAD      -1              /* Loadable line discipline */
 175 #endif
 176
 177 /*
 178  * Swap device table
 179  */
 180 struct swdevt {
 181         udev_t  sw_dev;                 /* For quasibogus swapdev reporting */
 182         int     sw_flags;
 183         int     sw_nblks;               /* Number of swap blocks on device */
 184         int     sw_nused;               /* swap blocks used on device */
 185         struct  vnode *sw_vp;
 186         struct cdev *sw_device;
 187 };
 188
 189 #define SW_FREED        0x01
 190 #define SW_SEQUENTIAL   0x02
 191 #define SW_CLOSING      0x04
 192 #define sw_freed        sw_flags        /* XXX compat */
 193
 194 #ifdef _KERNEL
 195
 196 l_ioctl_t       l_nullioctl;
 197 l_read_t        l_noread;
 198 l_write_t       l_nowrite;
 199
 200 struct module;
 201
 202 struct devsw_module_data {
 203         int     (*chainevh)(struct module *, int, void *); /* next handler */
 204         void    *chainarg;      /* arg for next event handler */
 205         /* Do not initialize fields hereafter */
 206 };
 207
 208 #define DEV_MODULE(name, evh, arg)                                      \
 209 static moduledata_t name##_mod = {                                      \
 210     #name,                                                              \
 211     evh,                                                                \
 212     arg                                                                 \
 213 };                                                                      \
 214 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
 215
 216 #define dev2unit(x)     ((minor(x) & 0xff) | (minor(x) >> 8))
 217
 218 int     count_dev (cdev_t dev);
 219 void    destroy_dev (cdev_t dev);
 220 void    release_dev (cdev_t dev);
 221 cdev_t  get_dev (int x, int y);
 222 cdev_t  reference_dev (cdev_t dev);
 223 struct dev_ops *devsw (cdev_t dev);
 224 const char *devtoname (cdev_t dev);
 225 void    freedev (cdev_t dev);
 226 int     iszerodev (cdev_t dev);
 227
 228 int     lminor (cdev_t dev);
 229 void    setconf (void);
 230 cdev_t  kgetdiskbyname(const char *name);
 231 int     dev_is_good(cdev_t dev);
 232
 233 /*
 234  * XXX: This included for when DEVFS resurfaces
 235  */
 236
 237 #define         UID_ROOT        0
 238 #define         UID_BIN         3
 239 #define         UID_UUCP        66
 240
 241 #define         GID_WHEEL       0
 242 #define         GID_KMEM        2
 243 #define         GID_TTY         4
 244 #define         GID_OPERATOR    5
 245 #define         GID_BIN         7
 246 #define         GID_GAMES       13
 247 #define         GID_DIALER      68
 248
 249 #endif /* _KERNEL */
 250 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 251
 252 #endif /* !_SYS_CONF_H_ */