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 1.10 2006/02/17 19:18:07 dillon Exp $
  41  */
  42
  43 #ifndef _SYS_CONF_H_
  44 #define _SYS_CONF_H_
  45
  46 #include <sys/queue.h>
  47 #include <sys/time.h>
  48 #include <sys/biotrack.h>
  49
  50 #define SPECNAMELEN     15
  51
  52 struct tty;
  53 struct disk;
  54 struct vnode;
  55 struct lwkt_port;
  56
  57 struct specinfo {
  58         u_int           si_flags;
  59         udev_t          si_udev;
  60         LIST_ENTRY(specinfo)    si_hash;
  61         SLIST_HEAD(, vnode) si_hlist;
  62         char            si_name[SPECNAMELEN + 1];
  63         void            *si_drv1;
  64         void            *si_drv2;
  65         struct cdevsw   *si_devsw;      /* direct device switch */
  66         struct lwkt_port *si_port;      /* direct port dispatch */
  67         int             si_iosize_max;  /* maximum I/O size (for physio &al) */
  68         int             si_refs;
  69         union {
  70                 struct {
  71                         struct tty *__sit_tty;
  72                 } __si_tty;
  73                 struct {
  74                         struct disk *__sid_disk;
  75                         struct mount *__sid_mountpoint;
  76                         int __sid_bsize_phys; /* min physical block size */
  77                         int __sid_bsize_best; /* optimal block size */
  78                 } __si_disk;
  79         } __si_u;
  80         struct bio_track si_track_read;
  81         struct bio_track si_track_write;
  82         time_t          si_lastread;            /* time_second */
  83         time_t          si_lastwrite;           /* time_second */
  84 };
  85
  86 #define SI_STASHED      0x0001  /* created in stashed storage */
  87 #define SI_HASHED       0x0002  /* in (maj,min) hash table */
  88 #define SI_ADHOC        0x0004  /* created via make_adhoc_dev() or udev2dev() */
  89
  90 #define si_tty          __si_u.__si_tty.__sit_tty
  91 #define si_disk         __si_u.__si_disk.__sid_disk
  92 #define si_mountpoint   __si_u.__si_disk.__sid_mountpoint
  93 #define si_bsize_phys   __si_u.__si_disk.__sid_bsize_phys
  94 #define si_bsize_best   __si_u.__si_disk.__sid_bsize_best
  95
  96 #define CDEVSW_ALL_MINORS       0       /* mask of 0 always matches 0 */
  97
  98 /*
  99  * Special device management
 100  */
 101 #define SPECHSZ 64
 102 #define SPECHASH(rdev)  (((unsigned)(minor(rdev)))%SPECHSZ)
 103
 104 /*
 105  * Definitions of device driver entry switches
 106  */
 107
 108 struct buf;
 109 struct bio;
 110 struct proc;
 111 struct uio;
 112 struct knote;
 113
 114 /*
 115  * Note: d_thread_t is provided as a transition aid for those drivers
 116  * that treat struct proc/struct thread as an opaque data type and
 117  * exist in substantially the same form in both 4.x and 5.x.  Writers
 118  * of drivers that dips into the d_thread_t structure should use
 119  * struct thread or struct proc as appropriate for the version of the
 120  * OS they are using.  It is provided in lieu of each device driver
 121  * inventing its own way of doing this.  While it does violate style(9)
 122  * in a number of ways, this violation is deemed to be less
 123  * important than the benefits that a uniform API between releases
 124  * gives.
 125  *
 126  * Users of struct thread/struct proc that aren't device drivers should
 127  * not use d_thread_t.
 128  */
 129
 130 struct thread;
 131 struct lwkt_port;
 132
 133 typedef struct thread d_thread_t;
 134 typedef int d_clone_t (dev_t dev);
 135 typedef int d_open_t (dev_t dev, int oflags, int devtype, d_thread_t *td);
 136 typedef int d_close_t (dev_t dev, int fflag, int devtype, d_thread_t *td);
 137 typedef void d_strategy_t (dev_t dev, struct bio *bio);
 138 typedef int d_ioctl_t (dev_t dev, u_long cmd, caddr_t data,
 139                            int fflag, d_thread_t *td);
 140 typedef int d_dump_t (dev_t dev, u_int count, u_int blkno, u_int secsize);
 141 typedef int d_psize_t (dev_t dev);
 142
 143 typedef int d_read_t (dev_t dev, struct uio *uio, int ioflag);
 144 typedef int d_write_t (dev_t dev, struct uio *uio, int ioflag);
 145 typedef int d_poll_t (dev_t dev, int events, d_thread_t *td);
 146 typedef int d_kqfilter_t (dev_t dev, struct knote *kn);
 147 typedef int d_mmap_t (dev_t dev, vm_offset_t offset, int nprot);
 148
 149 typedef int l_open_t (dev_t dev, struct tty *tp);
 150 typedef int l_close_t (struct tty *tp, int flag);
 151 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
 152 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag);
 153 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data,
 154                            int flag, d_thread_t *td);
 155 typedef int l_rint_t (int c, struct tty *tp);
 156 typedef int l_start_t (struct tty *tp);
 157 typedef int l_modem_t (struct tty *tp, int flag);
 158
 159 /*
 160  * Types for d_flags.
 161  */
 162 #define D_TAPE  0x0001
 163 #define D_DISK  0x0002
 164 #define D_TTY   0x0004
 165 #define D_MEM   0x0008
 166
 167 #define D_TYPEMASK      0xffff
 168
 169 /*
 170  * Flags for d_flags.
 171  */
 172 #define D_MEMDISK       0x00010000      /* memory type disk */
 173 #define D_NAGGED        0x00020000      /* nagged about missing make_dev() */
 174 #define D_CANFREE       0x00040000      /* can free blocks */
 175 #define D_TRACKCLOSE    0x00080000      /* track all closes */
 176 #define D_MASTER        0x00100000      /* used by pty/tty code */
 177 #define D_KQFILTER      0x00200000      /* has kqfilter entry */
 178
 179 /*
 180  * Character device switch table.
 181  *
 182  * NOTE: positions are hard coded for static structure initialization.
 183  */
 184 struct cdevsw {
 185         const char      *d_name;        /* base device name, e.g. 'vn' */
 186         int             d_maj;          /* major (char) device number */
 187         u_int           d_flags;        /* D_ flags */
 188         struct lwkt_port *d_port;       /* port (template only) */
 189         d_clone_t       *d_clone;       /* clone from base cdevsw */
 190
 191         /*
 192          * Old style vectors are used only if d_port is NULL when the cdevsw
 193          * is added to the system.   They have been renamed to prevent misuse.
 194          */
 195         d_open_t        *old_open;
 196         d_close_t       *old_close;
 197         d_read_t        *old_read;
 198         d_write_t       *old_write;
 199         d_ioctl_t       *old_ioctl;
 200         d_poll_t        *old_poll;
 201         d_mmap_t        *old_mmap;
 202         d_strategy_t    *old_strategy;
 203         d_dump_t        *old_dump;
 204         d_psize_t       *old_psize;
 205         d_kqfilter_t    *old_kqfilter;
 206         void            (*old_dummy1)(void);    /* expansion space */
 207         void            (*old_dummy2)(void);
 208         void            (*old_dummy3)(void);
 209         void            (*old_dummy4)(void);
 210         int             d_refs;                 /* ref count */
 211         void            *d_data;                /* custom driver data */
 212 };
 213
 214 struct cdevlink {
 215         struct cdevlink *next;
 216         u_int           mask;
 217         u_int           match;
 218         struct cdevsw   *devsw;
 219 };
 220
 221 /*
 222  * Line discipline switch table
 223  */
 224 struct linesw {
 225         l_open_t        *l_open;
 226         l_close_t       *l_close;
 227         l_read_t        *l_read;
 228         l_write_t       *l_write;
 229         l_ioctl_t       *l_ioctl;
 230         l_rint_t        *l_rint;
 231         l_start_t       *l_start;
 232         l_modem_t       *l_modem;
 233         u_char          l_hotchar;
 234 };
 235
 236 #ifdef _KERNEL
 237 extern struct linesw linesw[];
 238 extern int nlinesw;
 239
 240 int ldisc_register (int , struct linesw *);
 241 void ldisc_deregister (int);
 242 #define LDISC_LOAD      -1              /* Loadable line discipline */
 243 #endif
 244
 245 /*
 246  * Swap device table
 247  */
 248 struct swdevt {
 249         udev_t  sw_dev;                 /* For quasibogus swapdev reporting */
 250         int     sw_flags;
 251         int     sw_nblks;
 252         struct  vnode *sw_vp;
 253         dev_t   sw_device;
 254 };
 255 #define SW_FREED        0x01
 256 #define SW_SEQUENTIAL   0x02
 257 #define sw_freed        sw_flags        /* XXX compat */
 258
 259 #ifdef _KERNEL
 260 d_open_t        noopen;
 261 d_close_t       noclose;
 262 d_read_t        noread;
 263 d_write_t       nowrite;
 264 d_ioctl_t       noioctl;
 265 d_clone_t       noclone;
 266 d_mmap_t        nommap;
 267 d_kqfilter_t    nokqfilter;
 268 d_strategy_t    nostrategy;
 269 d_poll_t        nopoll;
 270 d_psize_t       nopsize;
 271 d_dump_t        nodump;
 272
 273 #define NUMCDEVSW 256
 274
 275 d_open_t        nullopen;
 276 d_close_t       nullclose;
 277
 278 l_ioctl_t       l_nullioctl;
 279 l_read_t        l_noread;
 280 l_write_t       l_nowrite;
 281
 282 struct module;
 283
 284 struct devsw_module_data {
 285         int     (*chainevh)(struct module *, int, void *); /* next handler */
 286         void    *chainarg;      /* arg for next event handler */
 287         /* Do not initialize fields hereafter */
 288 };
 289
 290 #define DEV_MODULE(name, evh, arg)                                      \
 291 static moduledata_t name##_mod = {                                      \
 292     #name,                                                              \
 293     evh,                                                                \
 294     arg                                                                 \
 295 };                                                                      \
 296 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
 297
 298 extern struct cdevsw dead_cdevsw;
 299
 300 void    compile_devsw(struct cdevsw *);
 301 int     cdevsw_add (struct cdevsw *, u_int mask, u_int match);
 302 struct cdevsw *cdevsw_add_override (dev_t, u_int mask, u_int match);
 303 struct lwkt_port *cdevsw_dev_override(dev_t dev, struct lwkt_port *port);
 304
 305 int     cdevsw_remove (struct cdevsw *, u_int mask, u_int match);
 306 struct cdevsw *cdevsw_get (int x, int y);
 307 void    cdevsw_release (struct cdevsw *);
 308 int     count_dev (dev_t dev);
 309 int     count_udev (udev_t dev);
 310 void    destroy_dev (dev_t dev);
 311 void    destroy_all_dev (struct cdevsw *, u_int mask, u_int match);
 312 void    release_dev (dev_t dev);
 313 dev_t   reference_dev (dev_t dev);
 314 struct cdevsw *devsw (dev_t dev);
 315 const char *devtoname (dev_t dev);
 316 void    freedev (dev_t dev);
 317 int     iszerodev (dev_t dev);
 318 dev_t   make_dev (struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...) __printflike(6, 7);
 319 dev_t   make_adhoc_dev (struct cdevsw *devsw, int minor);
 320 dev_t   make_sub_dev (dev_t dev, int minor);
 321 int     lminor (dev_t dev);
 322 void    setconf (void);
 323 dev_t   getdiskbyname(const char *name);
 324 int     dev_is_good(dev_t dev);
 325
 326 /*
 327  * XXX: This included for when DEVFS resurfaces
 328  */
 329
 330 #define         UID_ROOT        0
 331 #define         UID_BIN         3
 332 #define         UID_UUCP        66
 333
 334 #define         GID_WHEEL       0
 335 #define         GID_KMEM        2
 336 #define         GID_OPERATOR    5
 337 #define         GID_BIN         7
 338 #define         GID_GAMES       13
 339 #define         GID_DIALER      68
 340
 341 #endif /* _KERNEL */
 342
 343 #endif /* !_SYS_CONF_H_ */