conf.h revision 110317
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 110317 2003-02-04 10:32:40Z 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 u_int si_inode; 76 char *si_name; 77 void *si_drv1, *si_drv2; 78 struct cdevsw *si_devsw; 79 int si_iosize_max; /* maximum I/O size (for physio &al) */ 80 uid_t si_uid; 81 gid_t si_gid; 82 mode_t si_mode; 83 u_long si_usecount; 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 struct snaphead __sid_snapshots; 94 daddr_t __sid_snaplistsize; /* size of snapblklist. */ 95 daddr_t *__sid_snapblklist; /* known snapshot blocks. */ 96 int (*__sid_copyonwrite)(struct vnode *, struct buf *); 97 } __si_disk; 98 } __si_u; 99 char __si_namebuf[SPECNAMELEN + 1]; 100}; 101 102#define si_tty __si_u.__si_tty.__sit_tty 103#define si_disk __si_u.__si_disk.__sid_disk 104#define si_mountpoint __si_u.__si_disk.__sid_mountpoint 105#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 106#define si_bsize_best __si_u.__si_disk.__sid_bsize_best 107#define si_snapshots __si_u.__si_disk.__sid_snapshots 108#define si_snaplistsize __si_u.__si_disk.__sid_snaplistsize 109#define si_snapblklist __si_u.__si_disk.__sid_snapblklist 110#define si_copyonwrite __si_u.__si_disk.__sid_copyonwrite 111 112/* 113 * Special device management 114 */ 115#define SPECHSZ 64 116#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 117 118/* 119 * Definitions of device driver entry switches 120 */ 121 122struct bio; 123struct buf; 124struct thread; 125struct uio; 126struct knote; 127 128/* 129 * Note: d_thread_t is provided as a transition aid for those drivers 130 * that treat struct proc/struct thread as an opaque data type and 131 * exist in substantially the same form in both 4.x and 5.x. Writers 132 * of drivers that dips into the d_thread_t structure should use 133 * struct thread or struct proc as appropriate for the version of the 134 * OS they are using. It is provided in lieu of each device driver 135 * inventing its own way of doing this. While it does violate style(9) 136 * in a number of ways, this violation is deemed to be less 137 * important than the benefits that a uniform API between releases 138 * gives. 139 * 140 * Users of struct thread/struct proc that aren't device drivers should 141 * not use d_thread_t. 142 */ 143 144typedef struct thread d_thread_t; 145 146typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td); 147typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td); 148typedef void d_strategy_t(struct bio *bp); 149typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data, 150 int fflag, struct thread *td); 151typedef int d_dump_t(dev_t dev,void *virtual, vm_offset_t physical, off_t offset, size_t length); 152typedef int d_psize_t(dev_t dev); 153 154typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag); 155typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag); 156typedef int d_poll_t(dev_t dev, int events, struct thread *td); 157typedef int d_kqfilter_t(dev_t dev, struct knote *kn); 158typedef int d_mmap_t(dev_t dev, vm_offset_t offset, int nprot); 159 160typedef int l_open_t(dev_t dev, struct tty *tp); 161typedef int l_close_t(struct tty *tp, int flag); 162typedef int l_read_t(struct tty *tp, struct uio *uio, int flag); 163typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 164typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, 165 int flag, struct thread *td); 166typedef int l_rint_t(int c, struct tty *tp); 167typedef int l_start_t(struct tty *tp); 168typedef int l_modem_t(struct tty *tp, int flag); 169 170#define BIO_STRATEGY(bp) \ 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) \ 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); \ 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#define D_NOGIANT 0x00400000 /* Doesn't want Giant */ 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(int , struct linesw *); 253void ldisc_deregister(int); 254#define LDISC_LOAD -1 /* Loadable line discipline */ 255#endif /* _KERNEL */ 256 257#ifdef _KERNEL 258d_open_t noopen; 259d_close_t noclose; 260d_read_t noread; 261d_write_t nowrite; 262d_ioctl_t noioctl; 263d_mmap_t nommap; 264d_kqfilter_t nokqfilter; 265#define nostrategy ((d_strategy_t *)NULL) 266#define nopoll seltrue 267 268d_dump_t nodump; 269 270#define NUMCDEVSW 256 271 272/* 273 * nopsize is little used, so not worth having dummy functions for. 274 */ 275#define nopsize ((d_psize_t *)NULL) 276 277d_open_t nullopen; 278d_close_t nullclose; 279 280l_ioctl_t l_nullioctl; 281l_read_t l_noread; 282l_write_t l_nowrite; 283 284struct module; 285 286struct devsw_module_data { 287 int (*chainevh)(struct module *, int, void *); /* next handler */ 288 void *chainarg; /* arg for next event handler */ 289 /* Do not initialize fields hereafter */ 290}; 291 292#define DEV_MODULE(name, evh, arg) \ 293static moduledata_t name##_mod = { \ 294 #name, \ 295 evh, \ 296 arg \ 297}; \ 298DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 299 300 301int cdevsw_add(struct cdevsw *_new); 302int cdevsw_remove(struct cdevsw *_old); 303int count_dev(dev_t _dev); 304void destroy_dev(dev_t _dev); 305void revoke_and_destroy_dev(dev_t _dev); 306struct cdevsw *devsw(dev_t _dev); 307const char *devtoname(dev_t _dev); 308int dev_named(dev_t _pdev, const char *_name); 309void dev_depends(dev_t _pdev, dev_t _cdev); 310void freedev(dev_t _dev); 311dev_t makebdev(int _maj, int _min); 312dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid, 313 int _perms, const char *_fmt, ...) __printflike(6, 7); 314dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3); 315int dev2unit(dev_t _dev); 316int unit2minor(int _unit); 317void setconf(void); 318dev_t getdiskbyname(char *_name); 319 320/* This is type of the function DEVFS uses to hook into the kernel with */ 321typedef void devfs_create_t(dev_t dev); 322typedef void devfs_destroy_t(dev_t dev); 323 324extern devfs_create_t *devfs_create_hook; 325extern devfs_destroy_t *devfs_destroy_hook; 326 327#define UID_ROOT 0 328#define UID_BIN 3 329#define UID_UUCP 66 330 331#define GID_WHEEL 0 332#define GID_KMEM 2 333#define GID_OPERATOR 5 334#define GID_BIN 7 335#define GID_GAMES 13 336#define GID_DIALER 68 337 338typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result); 339 340int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 341EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 342 343/* Stuff relating to kernel-dump */ 344 345typedef int dumper_t( 346 void *priv, /* Private to the driver. */ 347 void *virtual, /* Virtual (mapped) address. */ 348 vm_offset_t physical, /* Physical address of virtual. */ 349 off_t offset, /* Byte-offset to write at. */ 350 size_t length); /* Number of bytes to dump. */ 351 352struct dumperinfo { 353 dumper_t *dumper; /* Dumping function. */ 354 void *priv; /* Private parts. */ 355 u_int blocksize; /* Size of block in bytes. */ 356 off_t mediaoffset; /* Initial offset in bytes. */ 357 off_t mediasize; /* Space available in bytes. */ 358}; 359 360int set_dumper(struct dumperinfo *); 361void dumpsys(struct dumperinfo *); 362extern int dumping; /* system is dumping */ 363 364#endif /* _KERNEL */ 365 366#endif /* !_SYS_CONF_H_ */ 367