conf.h revision 86893
1/*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 2000 5 * Poul-Henning Kamp. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)conf.h 8.5 (Berkeley) 1/9/95 41 * $FreeBSD: head/sys/sys/conf.h 86893 2001-11-25 21:06:21Z dd $ 42 */ 43 44#ifndef _SYS_CONF_H_ 45#define _SYS_CONF_H_ 46 47#ifdef _KERNEL 48#include <sys/eventhandler.h> 49 50struct tty; 51struct disk; 52struct vnode; 53struct buf; 54TAILQ_HEAD(snaphead, inode); 55 56struct specinfo { 57 u_int si_flags; 58#define SI_STASHED 0x0001 /* created in stashed storage */ 59#define SI_ALIAS 0x0002 /* carrier of alias name */ 60#define SI_NAMED 0x0004 /* make_dev{_alias} has been called */ 61#define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */ 62#define SI_CHILD 0x0010 /* child of another dev_t */ 63#define SI_DEVOPEN 0x0020 /* opened by device */ 64#define SI_CONSOPEN 0x0040 /* opened by console */ 65 struct timespec si_atime; 66 struct timespec si_ctime; 67 struct timespec si_mtime; 68 udev_t si_udev; 69 LIST_ENTRY(specinfo) si_hash; 70 SLIST_HEAD(, vnode) si_hlist; 71 LIST_HEAD(, specinfo) si_children; 72 LIST_ENTRY(specinfo) si_siblings; 73 dev_t si_parent; 74 struct snaphead si_snapshots; 75 int (*si_copyonwrite)(struct vnode *, struct buf *); 76 u_int si_inode; 77 char si_name[SPECNAMELEN + 1]; 78 void *si_drv1, *si_drv2; 79 struct cdevsw *si_devsw; 80 int si_iosize_max; /* maximum I/O size (for physio &al) */ 81 uid_t si_uid; 82 gid_t si_gid; 83 mode_t si_mode; 84 union { 85 struct { 86 struct tty *__sit_tty; 87 } __si_tty; 88 struct { 89 struct disk *__sid_disk; 90 struct mount *__sid_mountpoint; 91 int __sid_bsize_phys; /* min physical block size */ 92 int __sid_bsize_best; /* optimal block size */ 93 } __si_disk; 94 } __si_u; 95}; 96 97#define si_tty __si_u.__si_tty.__sit_tty 98#define si_disk __si_u.__si_disk.__sid_disk 99#define si_mountpoint __si_u.__si_disk.__sid_mountpoint 100#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 101#define si_bsize_best __si_u.__si_disk.__sid_bsize_best 102 103/* 104 * Special device management 105 */ 106#define SPECHSZ 64 107#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 108 109/* 110 * Definitions of device driver entry switches 111 */ 112 113struct bio; 114struct buf; 115struct thread; 116struct uio; 117struct knote; 118 119/* 120 * Note: d_thread_t is provided as a transition aid for those drivers 121 * that treat struct proc/struct thread as an opaque data type and 122 * exist in substantially the same form in both 4.x and 5.x. Writers 123 * of drivers that dips into the d_thread_t structure should use 124 * struct thread or struct proc as appropriate for the version of the 125 * OS they are using. It is provided in lieu of each device driver 126 * inventing its own way of doing this. While it does violate style(9) 127 * in a number of ways, this violation is deemed to be less 128 * important than the benefits that a uniform API between releases 129 * gives. 130 * 131 * Users of struct thread/struct proc that aren't device drivers should 132 * not use d_thread_t. 133 */ 134 135typedef struct thread d_thread_t; 136 137typedef int d_open_t __P((dev_t dev, int oflags, int devtype, 138 struct thread *td)); 139typedef int d_close_t __P((dev_t dev, int fflag, int devtype, 140 struct thread *td)); 141typedef void d_strategy_t __P((struct bio *bp)); 142typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data, 143 int fflag, struct thread *td)); 144typedef int d_dump_t __P((dev_t dev)); 145typedef int d_psize_t __P((dev_t dev)); 146 147typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag)); 148typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag)); 149typedef int d_poll_t __P((dev_t dev, int events, struct thread *td)); 150typedef int d_kqfilter_t __P((dev_t dev, struct knote *kn)); 151typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot)); 152 153typedef int l_open_t __P((dev_t dev, struct tty *tp)); 154typedef int l_close_t __P((struct tty *tp, int flag)); 155typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag)); 156typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag)); 157typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data, 158 int flag, struct thread*td)); 159typedef int l_rint_t __P((int c, struct tty *tp)); 160typedef int l_start_t __P((struct tty *tp)); 161typedef int l_modem_t __P((struct tty *tp, int flag)); 162 163/* 164 * XXX: The dummy argument can be used to do what strategy1() never 165 * did anywhere: Create a per device flag to lock the device during 166 * label/slice surgery, all calls with a dummy == 0 gets stalled on 167 * a queue somewhere, whereas dummy == 1 are let through. Once out 168 * of surgery, reset the flag and restart all the stuff on the stall 169 * queue. 170 */ 171#define BIO_STRATEGY(bp, dummy) \ 172 do { \ 173 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \ 174 Debugger("bio_cmd botch"); \ 175 (*devsw((bp)->bio_dev)->d_strategy)(bp); \ 176 } while (0) 177 178#define DEV_STRATEGY(bp, dummy) \ 179 do { \ 180 if ((bp)->b_flags & B_PHYS) \ 181 (bp)->b_io.bio_offset = (bp)->b_offset; \ 182 else \ 183 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \ 184 (bp)->b_io.bio_done = bufdonebio; \ 185 (bp)->b_io.bio_caller2 = (bp); \ 186 BIO_STRATEGY(&(bp)->b_io, dummy); \ 187 } while (0) 188 189#endif /* _KERNEL */ 190 191/* 192 * Types for d_flags. 193 */ 194#define D_TAPE 0x0001 195#define D_DISK 0x0002 196#define D_TTY 0x0004 197#define D_MEM 0x0008 198 199#ifdef _KERNEL 200 201#define D_TYPEMASK 0xffff 202 203/* 204 * Flags for d_flags. 205 */ 206#define D_MEMDISK 0x00010000 /* memory type disk */ 207#define D_NAGGED 0x00020000 /* nagged about missing make_dev() */ 208#define D_CANFREE 0x00040000 /* can free blocks */ 209#define D_TRACKCLOSE 0x00080000 /* track all closes */ 210#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */ 211#define D_KQFILTER 0x00200000 /* has kqfilter entry */ 212 213/* 214 * Character device switch table 215 */ 216struct cdevsw { 217 d_open_t *d_open; 218 d_close_t *d_close; 219 d_read_t *d_read; 220 d_write_t *d_write; 221 d_ioctl_t *d_ioctl; 222 d_poll_t *d_poll; 223 d_mmap_t *d_mmap; 224 d_strategy_t *d_strategy; 225 const char *d_name; /* base device name, e.g. 'vn' */ 226 int d_maj; 227 d_dump_t *d_dump; 228 d_psize_t *d_psize; 229 u_int d_flags; 230 /* additions below are not binary compatible with 4.2 and below */ 231 d_kqfilter_t *d_kqfilter; 232}; 233 234/* 235 * Line discipline switch table 236 */ 237struct linesw { 238 l_open_t *l_open; 239 l_close_t *l_close; 240 l_read_t *l_read; 241 l_write_t *l_write; 242 l_ioctl_t *l_ioctl; 243 l_rint_t *l_rint; 244 l_start_t *l_start; 245 l_modem_t *l_modem; 246 u_char l_hotchar; 247}; 248 249extern struct linesw linesw[]; 250extern int nlinesw; 251 252int ldisc_register __P((int , struct linesw *)); 253void ldisc_deregister __P((int)); 254#define LDISC_LOAD -1 /* Loadable line discipline */ 255#endif /* _KERNEL */ 256 257/* 258 * Swap device table 259 */ 260struct swdevt { 261 udev_t sw_dev; /* For quasibogus swapdev reporting */ 262 int sw_flags; 263 int sw_nblks; 264 int sw_used; 265 struct vnode *sw_vp; 266 dev_t sw_device; 267}; 268#define SW_FREED 0x01 269#define SW_SEQUENTIAL 0x02 270#define sw_freed sw_flags /* XXX compat */ 271 272#ifdef _KERNEL 273d_open_t noopen; 274d_close_t noclose; 275d_read_t noread; 276d_write_t nowrite; 277d_ioctl_t noioctl; 278d_mmap_t nommap; 279d_kqfilter_t nokqfilter; 280#define nostrategy ((d_strategy_t *)NULL) 281#define nopoll seltrue 282 283d_dump_t nodump; 284 285#define NUMCDEVSW 256 286 287/* 288 * nopsize is little used, so not worth having dummy functions for. 289 */ 290#define nopsize ((d_psize_t *)NULL) 291 292d_open_t nullopen; 293d_close_t nullclose; 294 295l_ioctl_t l_nullioctl; 296l_read_t l_noread; 297l_write_t l_nowrite; 298 299struct module; 300 301struct devsw_module_data { 302 int (*chainevh)(struct module *, int, void *); /* next handler */ 303 void *chainarg; /* arg for next event handler */ 304 /* Do not initialize fields hereafter */ 305}; 306 307#define DEV_MODULE(name, evh, arg) \ 308static moduledata_t name##_mod = { \ 309 #name, \ 310 evh, \ 311 arg \ 312}; \ 313DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 314 315 316int cdevsw_add __P((struct cdevsw *new)); 317int cdevsw_remove __P((struct cdevsw *old)); 318int count_dev __P((dev_t dev)); 319void destroy_dev __P((dev_t dev)); 320struct cdevsw *devsw __P((dev_t dev)); 321const char *devtoname __P((dev_t dev)); 322int dev_named __P((dev_t pdev, const char *name)); 323void dev_depends __P((dev_t pdev, dev_t cdev)); 324void freedev __P((dev_t dev)); 325int iszerodev __P((dev_t dev)); 326dev_t makebdev __P((int maj, int min)); 327dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...)) __printflike(6, 7); 328dev_t make_dev_alias __P((dev_t pdev, const char *fmt, ...)) __printflike(2, 3); 329int dev2unit __P((dev_t dev)); 330int unit2minor __P((int unit)); 331void setconf __P((void)); 332dev_t getdiskbyname(char *name); 333 334/* This is type of the function DEVFS uses to hook into the kernel with */ 335typedef void devfs_create_t __P((dev_t dev)); 336typedef void devfs_destroy_t __P((dev_t dev)); 337 338extern devfs_create_t *devfs_create_hook; 339extern devfs_destroy_t *devfs_destroy_hook; 340extern int devfs_present; 341 342#define UID_ROOT 0 343#define UID_BIN 3 344#define UID_UUCP 66 345 346#define GID_WHEEL 0 347#define GID_KMEM 2 348#define GID_OPERATOR 5 349#define GID_BIN 7 350#define GID_GAMES 13 351#define GID_DIALER 68 352 353typedef void (*dev_clone_fn) __P((void *arg, char *name, int namelen, dev_t *result)); 354 355int dev_stdclone __P((char *name, char **namep, char *stem, int *unit)); 356EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 357#endif /* _KERNEL */ 358 359#endif /* !_SYS_CONF_H_ */ 360