conf.h revision 104043
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 104043 2002-09-27 18:27:10Z phk $ 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 cdev { 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#define SI_DUMPDEV 0x0080 /* is kernel dumpdev */ 66 struct timespec si_atime; 67 struct timespec si_ctime; 68 struct timespec si_mtime; 69 udev_t si_udev; 70 LIST_ENTRY(cdev) si_hash; 71 SLIST_HEAD(, vnode) si_hlist; 72 LIST_HEAD(, cdev) si_children; 73 LIST_ENTRY(cdev) si_siblings; 74 dev_t si_parent; 75 struct snaphead si_snapshots; 76 int (*si_copyonwrite)(struct vnode *, struct buf *); 77 u_int si_inode; 78 char si_name[SPECNAMELEN + 1]; 79 void *si_drv1, *si_drv2; 80 struct cdevsw *si_devsw; 81 int si_iosize_max; /* maximum I/O size (for physio &al) */ 82 uid_t si_uid; 83 gid_t si_gid; 84 mode_t si_mode; 85 union { 86 struct { 87 struct tty *__sit_tty; 88 } __si_tty; 89 struct { 90 struct disk *__sid_disk; 91 struct mount *__sid_mountpoint; 92 int __sid_bsize_phys; /* min physical block size */ 93 int __sid_bsize_best; /* optimal block size */ 94 } __si_disk; 95 } __si_u; 96}; 97 98#define si_tty __si_u.__si_tty.__sit_tty 99#define si_disk __si_u.__si_disk.__sid_disk 100#define si_mountpoint __si_u.__si_disk.__sid_mountpoint 101#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 102#define si_bsize_best __si_u.__si_disk.__sid_bsize_best 103 104/* 105 * Special device management 106 */ 107#define SPECHSZ 64 108#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 109 110/* 111 * Definitions of device driver entry switches 112 */ 113 114struct bio; 115struct buf; 116struct thread; 117struct uio; 118struct knote; 119 120/* 121 * Note: d_thread_t is provided as a transition aid for those drivers 122 * that treat struct proc/struct thread as an opaque data type and 123 * exist in substantially the same form in both 4.x and 5.x. Writers 124 * of drivers that dips into the d_thread_t structure should use 125 * struct thread or struct proc as appropriate for the version of the 126 * OS they are using. It is provided in lieu of each device driver 127 * inventing its own way of doing this. While it does violate style(9) 128 * in a number of ways, this violation is deemed to be less 129 * important than the benefits that a uniform API between releases 130 * gives. 131 * 132 * Users of struct thread/struct proc that aren't device drivers should 133 * not use d_thread_t. 134 */ 135 136typedef struct thread d_thread_t; 137 138typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td); 139typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td); 140typedef void d_strategy_t(struct bio *bp); 141typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data, 142 int fflag, struct thread *td); 143typedef int d_dump_t(dev_t dev,void *virtual, vm_offset_t physical, off_t offset, size_t length); 144typedef int d_psize_t(dev_t dev); 145 146typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag); 147typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag); 148typedef int d_poll_t(dev_t dev, int events, struct thread *td); 149typedef int d_kqfilter_t(dev_t dev, struct knote *kn); 150typedef int d_mmap_t(dev_t dev, vm_offset_t offset, int nprot); 151 152typedef int l_open_t(dev_t dev, struct tty *tp); 153typedef int l_close_t(struct tty *tp, int flag); 154typedef int l_read_t(struct tty *tp, struct uio *uio, int flag); 155typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 156typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, 157 int flag, struct thread *td); 158typedef int l_rint_t(int c, struct tty *tp); 159typedef int l_start_t(struct tty *tp); 160typedef int l_modem_t(struct tty *tp, int flag); 161 162/* 163 * XXX: The dummy argument can be used to do what strategy1() never 164 * did anywhere: Create a per device flag to lock the device during 165 * label/slice surgery, all calls with a dummy == 0 gets stalled on 166 * a queue somewhere, whereas dummy == 1 are let through. Once out 167 * of surgery, reset the flag and restart all the stuff on the stall 168 * queue. 169 */ 170#define BIO_STRATEGY(bp, dummy) \ 171 do { \ 172 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \ 173 Debugger("bio_cmd botch"); \ 174 (*devsw((bp)->bio_dev)->d_strategy)(bp); \ 175 } while (0) 176 177#define DEV_STRATEGY(bp, dummy) \ 178 do { \ 179 if ((bp)->b_flags & B_PHYS) \ 180 (bp)->b_io.bio_offset = (bp)->b_offset; \ 181 else \ 182 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \ 183 (bp)->b_io.bio_done = bufdonebio; \ 184 (bp)->b_io.bio_caller2 = (bp); \ 185 BIO_STRATEGY(&(bp)->b_io, dummy); \ 186 } while (0) 187 188#endif /* _KERNEL */ 189 190/* 191 * Types for d_flags. 192 */ 193#define D_TAPE 0x0001 194#define D_DISK 0x0002 195#define D_TTY 0x0004 196#define D_MEM 0x0008 197 198#ifdef _KERNEL 199 200#define D_TYPEMASK 0xffff 201 202/* 203 * Flags for d_flags. 204 */ 205#define D_MEMDISK 0x00010000 /* memory type disk */ 206#define D_NAGGED 0x00020000 /* nagged about missing make_dev() */ 207#define D_CANFREE 0x00040000 /* can free blocks */ 208#define D_TRACKCLOSE 0x00080000 /* track all closes */ 209#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */ 210#define D_KQFILTER 0x00200000 /* has kqfilter entry */ 211 212/* 213 * Character device switch table 214 */ 215struct cdevsw { 216 d_open_t *d_open; 217 d_close_t *d_close; 218 d_read_t *d_read; 219 d_write_t *d_write; 220 d_ioctl_t *d_ioctl; 221 d_poll_t *d_poll; 222 d_mmap_t *d_mmap; 223 d_strategy_t *d_strategy; 224 const char *d_name; /* base device name, e.g. 'vn' */ 225 int d_maj; 226 d_dump_t *d_dump; 227 d_psize_t *d_psize; 228 u_int d_flags; 229 /* additions below are not binary compatible with 4.2 and below */ 230 d_kqfilter_t *d_kqfilter; 231}; 232 233/* 234 * Line discipline switch table 235 */ 236struct linesw { 237 l_open_t *l_open; 238 l_close_t *l_close; 239 l_read_t *l_read; 240 l_write_t *l_write; 241 l_ioctl_t *l_ioctl; 242 l_rint_t *l_rint; 243 l_start_t *l_start; 244 l_modem_t *l_modem; 245 u_char l_hotchar; 246}; 247 248extern struct linesw linesw[]; 249extern int nlinesw; 250 251int ldisc_register(int , struct linesw *); 252void ldisc_deregister(int); 253#define LDISC_LOAD -1 /* Loadable line discipline */ 254#endif /* _KERNEL */ 255 256/* 257 * Swap device table 258 */ 259struct swdevt { 260 udev_t sw_dev; /* For quasibogus swapdev reporting */ 261 int sw_flags; 262 int sw_nblks; 263 int sw_used; 264 struct vnode *sw_vp; 265 dev_t sw_device; 266}; 267#define SW_FREED 0x01 268#define SW_SEQUENTIAL 0x02 269#define sw_freed sw_flags /* XXX compat */ 270 271#ifdef _KERNEL 272d_open_t noopen; 273d_close_t noclose; 274d_read_t noread; 275d_write_t nowrite; 276d_ioctl_t noioctl; 277d_mmap_t nommap; 278d_kqfilter_t nokqfilter; 279#define nostrategy ((d_strategy_t *)NULL) 280#define nopoll seltrue 281 282d_dump_t nodump; 283 284#define NUMCDEVSW 256 285 286/* 287 * nopsize is little used, so not worth having dummy functions for. 288 */ 289#define nopsize ((d_psize_t *)NULL) 290 291d_open_t nullopen; 292d_close_t nullclose; 293 294l_ioctl_t l_nullioctl; 295l_read_t l_noread; 296l_write_t l_nowrite; 297 298struct module; 299 300struct devsw_module_data { 301 int (*chainevh)(struct module *, int, void *); /* next handler */ 302 void *chainarg; /* arg for next event handler */ 303 /* Do not initialize fields hereafter */ 304}; 305 306#define DEV_MODULE(name, evh, arg) \ 307static moduledata_t name##_mod = { \ 308 #name, \ 309 evh, \ 310 arg \ 311}; \ 312DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 313 314 315int cdevsw_add(struct cdevsw *_new); 316int cdevsw_remove(struct cdevsw *_old); 317int count_dev(dev_t _dev); 318void destroy_dev(dev_t _dev); 319void revoke_and_destroy_dev(dev_t _dev); 320struct cdevsw *devsw(dev_t _dev); 321const char *devtoname(dev_t _dev); 322int dev_named(dev_t _pdev, const char *_name); 323void dev_depends(dev_t _pdev, dev_t _cdev); 324void freedev(dev_t _dev); 325int iszerodev(dev_t _dev); 326dev_t makebdev(int _maj, int _min); 327dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid, 328 int _perms, const char *_fmt, ...) __printflike(6, 7); 329dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3); 330int dev2unit(dev_t _dev); 331int unit2minor(int _unit); 332void setconf(void); 333dev_t getdiskbyname(char *_name); 334 335/* This is type of the function DEVFS uses to hook into the kernel with */ 336typedef void devfs_create_t(dev_t dev); 337typedef void devfs_destroy_t(dev_t dev); 338 339extern devfs_create_t *devfs_create_hook; 340extern devfs_destroy_t *devfs_destroy_hook; 341extern int devfs_present; 342 343#define UID_ROOT 0 344#define UID_BIN 3 345#define UID_UUCP 66 346 347#define GID_WHEEL 0 348#define GID_KMEM 2 349#define GID_OPERATOR 5 350#define GID_BIN 7 351#define GID_GAMES 13 352#define GID_DIALER 68 353 354typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result); 355 356int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 357EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 358 359/* Stuff relating to kernel-dump */ 360 361typedef int dumper_t( 362 void *priv, /* Private to the driver. */ 363 void *virtual, /* Virtual (mapped) address. */ 364 vm_offset_t physical, /* Physical address of virtual. */ 365 off_t offset, /* Byte-offset to write at. */ 366 size_t length); /* Number of bytes to dump. */ 367 368struct dumperinfo { 369 dumper_t *dumper; /* Dumping function. */ 370 void *priv; /* Private parts. */ 371 u_int blocksize; /* Size of block in bytes. */ 372 off_t mediaoffset; /* Initial offset in bytes. */ 373 off_t mediasize; /* Space available in bytes. */ 374}; 375 376int set_dumper(struct dumperinfo *); 377void dumpsys(struct dumperinfo *); 378extern int dumping; /* system is dumping */ 379 380#endif /* _KERNEL */ 381 382#endif /* !_SYS_CONF_H_ */ 383