conf.h revision 50405
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 * $Id: conf.h,v 1.78 1999/08/25 22:50:12 julian Exp $ 40 */ 41 42#ifndef _SYS_CONF_H_ 43#define _SYS_CONF_H_ 44 45#include <sys/queue.h> 46 47#define SPECNAMELEN 15 48 49struct tty; 50struct vnode; 51 52struct specinfo { 53 54 udev_t si_udev; 55 SLIST_ENTRY(specinfo) si_hash; 56 SLIST_HEAD(, vnode) si_hlist; 57 char si_name[SPECNAMELEN + 1]; 58 void *si_drv1, *si_drv2; 59 struct cdevsw *si_devsw; 60 void *si_devfs; /* save cookie for devfs operations */ 61 void *si_bdevfs; /* XXX block device (should go away) */ 62 union { 63 struct { 64 struct tty *__sit_tty; 65 } __si_tty; 66 struct { 67 struct mount *__sid_mountpoint; 68 int __sid_bsize_phys; /* min physical block size */ 69 int __sid_bsize_best; /* optimal block size */ 70 int __sid_bsize_max; /* maximum block size */ 71 } __si_disk; 72 } __si_u; 73}; 74 75#define si_tty_tty __si_u.__si_tty.__sit_tty 76#define si_mountpoint __si_u.__si_disk.__sid_mountpoint 77#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 78#define si_bsize_best __si_u.__si_disk.__sid_bsize_best 79#define si_bsize_max __si_u.__si_disk.__sid_bsize_max 80 81/* 82 * Exported shorthand 83 */ 84#define v_hashchain v_rdev->si_hlist 85#define v_specmountpoint v_rdev->si_mountpoint 86 87/* 88 * Special device management 89 */ 90#define SPECHSZ 64 91#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 92 93/* 94 * Definitions of device driver entry switches 95 */ 96 97struct buf; 98struct proc; 99struct uio; 100 101typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p)); 102typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p)); 103typedef void d_strategy_t __P((struct buf *bp)); 104typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl)); 105typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data, 106 int fflag, struct proc *p)); 107typedef int d_dump_t __P((dev_t dev)); 108typedef int d_psize_t __P((dev_t dev)); 109 110typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag)); 111typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag)); 112typedef void d_stop_t __P((struct tty *tp, int rw)); 113typedef int d_reset_t __P((dev_t dev)); 114typedef struct tty *d_devtotty_t __P((dev_t dev)); 115typedef int d_poll_t __P((dev_t dev, int events, struct proc *p)); 116typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot)); 117 118typedef int l_open_t __P((dev_t dev, struct tty *tp)); 119typedef int l_close_t __P((struct tty *tp, int flag)); 120typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag)); 121typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag)); 122typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data, 123 int flag, struct proc *p)); 124typedef int l_rint_t __P((int c, struct tty *tp)); 125typedef int l_start_t __P((struct tty *tp)); 126typedef int l_modem_t __P((struct tty *tp, int flag)); 127 128/* This is type of the function DEVFS uses to hook into the kernel with */ 129typedef void devfs_create_t __P((dev_t dev, uid_t uid, gid_t gid, int perms)); 130 131/* 132 * XXX: The dummy argument can be used to do what strategy1() never 133 * did anywhere: Create a per device flag to lock the device during 134 * label/slice surgery, all calls with a dummy == 0 gets stalled on 135 * a queue somewhere, whereas dummy == 1 are let through. Once out 136 * of surgery, reset the flag and restart all the stuff on the stall 137 * queue. 138 */ 139#define BUF_STRATEGY(bp, dummy) (*devsw((bp)->b_dev)->d_strategy)(bp) 140/* 141 * Types for d_type. 142 */ 143#define D_TAPE 1 144#define D_DISK 2 145#define D_TTY 4 146 147#define D_TYPEMASK 0xffff 148 149/* 150 * Flags for d_flags. 151 */ 152#define D_NOCLUSTERR 0x10000 /* disables cluter read */ 153#define D_NOCLUSTERW 0x20000 /* disables cluster write */ 154#define D_NOCLUSTERRW (D_NOCLUSTERR | D_NOCLUSTERW) 155#define D_CANFREE 0x40000 /* can free blocks */ 156#define D_TRACKCLOSE 0x80000 /* track all closes */ 157 158/* 159 * Character device switch table 160 */ 161struct cdevsw { 162 d_open_t *d_open; 163 d_close_t *d_close; 164 d_read_t *d_read; 165 d_write_t *d_write; 166 d_ioctl_t *d_ioctl; 167 d_stop_t *d_stop; 168 d_reset_t *d_bogoreset; /* XXX not used */ 169 d_devtotty_t *d_devtotty; 170 d_poll_t *d_poll; 171 d_mmap_t *d_mmap; 172 d_strategy_t *d_strategy; 173 char *d_name; /* base device name, e.g. 'vn' */ 174 d_parms_t *d_bogoparms; /* XXX not used */ 175 int d_maj; 176 d_dump_t *d_dump; 177 d_psize_t *d_psize; 178 u_int d_flags; 179 int d_maxio; 180 int d_bmaj; 181}; 182 183/* 184 * Line discipline switch table 185 */ 186struct linesw { 187 l_open_t *l_open; 188 l_close_t *l_close; 189 l_read_t *l_read; 190 l_write_t *l_write; 191 l_ioctl_t *l_ioctl; 192 l_rint_t *l_rint; 193 l_start_t *l_start; 194 l_modem_t *l_modem; 195 u_char l_hotchar; 196}; 197 198#ifdef KERNEL 199extern struct linesw linesw[]; 200extern int nlinesw; 201 202int ldisc_register __P((int , struct linesw *)); 203void ldisc_deregister __P((int)); 204#define LDISC_LOAD -1 /* Loadable line discipline */ 205#endif 206 207/* 208 * Swap device table 209 */ 210struct swdevt { 211 udev_t sw_dev; /* For quasibogus swapdev reporting */ 212 int sw_flags; 213 int sw_nblks; 214 struct vnode *sw_vp; 215 dev_t sw_device; 216}; 217#define SW_FREED 0x01 218#define SW_SEQUENTIAL 0x02 219#define sw_freed sw_flags /* XXX compat */ 220 221#ifdef KERNEL 222d_open_t noopen; 223d_close_t noclose; 224d_read_t noread; 225d_write_t nowrite; 226d_ioctl_t noioctl; 227d_stop_t nostop; 228d_reset_t noreset; 229d_devtotty_t nodevtotty; 230d_mmap_t nommap; 231#define nostrategy ((d_strategy_t *)NULL) 232#define noparms ((d_parms_t *)NULL) 233#define nopoll seltrue 234 235d_dump_t nodump; 236 237#define NUMCDEVSW 256 238 239/* 240 * nopsize is little used, so not worth having dummy functions for. 241 */ 242#define nopsize ((d_psize_t *)NULL) 243 244d_open_t nullopen; 245d_close_t nullclose; 246 247l_read_t l_noread; 248l_write_t l_nowrite; 249 250struct module; 251 252struct devsw_module_data { 253 int (*chainevh)(struct module *, int, void *); /* next handler */ 254 void *chainarg; /* arg for next event handler */ 255 struct cdevsw *cdevsw; /* device functions */ 256 /* Do not initialize fields hereafter */ 257}; 258 259#define DEV_MODULE(name, cmaj, bmaj, devsw, evh, arg) \ 260static struct devsw_module_data name##_devsw_mod = { \ 261 evh, arg, &devsw \ 262}; \ 263 \ 264static moduledata_t name##_mod = { \ 265 #name, \ 266 devsw_module_handler, \ 267 &name##_devsw_mod \ 268}; \ 269DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+cmaj*256+bmaj) 270 271 272int cdevsw_add __P((struct cdevsw *new)); 273int cdevsw_remove __P((struct cdevsw *old)); 274dev_t chrtoblk __P((dev_t dev)); 275struct cdevsw *devsw __P((dev_t dev)); 276int devsw_module_handler __P((struct module *mod, int what, void *arg)); 277char *devtoname __P((dev_t dev)); 278int iskmemdev __P((dev_t dev)); 279int iszerodev __P((dev_t dev)); 280dev_t makebdev __P((int maj, int min)); 281dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, char *fmt, ...)) __printflike(6, 7); 282int lminor __P((dev_t dev)); 283void setconf __P((void)); 284 285extern devfs_create_t *devfs_create_hook; 286 287/* 288 * XXX: This included for when DEVFS resurfaces 289 */ 290 291#define UID_ROOT 0 292#define UID_BIN 3 293#define UID_UUCP 66 294 295#define GID_WHEEL 0 296#define GID_KMEM 2 297#define GID_OPERATOR 5 298#define GID_BIN 7 299#define GID_GAMES 13 300#define GID_DIALER 68 301 302#endif /* KERNEL */ 303 304#endif /* !_SYS_CONF_H_ */ 305