conf.h revision 111622
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 111622 2003-02-27 14:46:51Z 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#define SI_CANDELETE 0x0100 /* can do BIO_DELETE */ 67 struct timespec si_atime; 68 struct timespec si_ctime; 69 struct timespec si_mtime; 70 udev_t si_udev; 71 LIST_ENTRY(cdev) si_hash; 72 SLIST_HEAD(, vnode) si_hlist; 73 LIST_HEAD(, cdev) si_children; 74 LIST_ENTRY(cdev) si_siblings; 75 dev_t si_parent; 76 u_int si_inode; 77 char *si_name; 78 void *si_drv1, *si_drv2; 79 struct cdevsw *si_devsw; 80 int si_iosize_max; /* maximum I/O size (for physio &al) */ 81 u_int si_stripesize; 82 u_int si_stripeoffset; 83 uid_t si_uid; 84 gid_t si_gid; 85 mode_t si_mode; 86 u_long si_usecount; 87 union { 88 struct { 89 struct tty *__sit_tty; 90 } __si_tty; 91 struct { 92 struct disk *__sid_disk; 93 struct mount *__sid_mountpoint; 94 int __sid_bsize_phys; /* min physical block size */ 95 int __sid_bsize_best; /* optimal block size */ 96 struct snaphead __sid_snapshots; 97 daddr_t __sid_snaplistsize; /* size of snapblklist. */ 98 daddr_t *__sid_snapblklist; /* known snapshot blocks. */ 99 int (*__sid_copyonwrite)(struct vnode *, struct buf *); 100 } __si_disk; 101 } __si_u; 102 char __si_namebuf[SPECNAMELEN + 1]; 103}; 104 105#define si_tty __si_u.__si_tty.__sit_tty 106#define si_disk __si_u.__si_disk.__sid_disk 107#define si_mountpoint __si_u.__si_disk.__sid_mountpoint 108#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 109#define si_bsize_best __si_u.__si_disk.__sid_bsize_best 110#define si_snapshots __si_u.__si_disk.__sid_snapshots 111#define si_snaplistsize __si_u.__si_disk.__sid_snaplistsize 112#define si_snapblklist __si_u.__si_disk.__sid_snapblklist 113#define si_copyonwrite __si_u.__si_disk.__sid_copyonwrite 114 115/* 116 * Special device management 117 */ 118#define SPECHSZ 64 119#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 120 121/* 122 * Definitions of device driver entry switches 123 */ 124 125struct bio; 126struct buf; 127struct thread; 128struct uio; 129struct knote; 130 131/* 132 * Note: d_thread_t is provided as a transition aid for those drivers 133 * that treat struct proc/struct thread as an opaque data type and 134 * exist in substantially the same form in both 4.x and 5.x. Writers 135 * of drivers that dips into the d_thread_t structure should use 136 * struct thread or struct proc as appropriate for the version of the 137 * OS they are using. It is provided in lieu of each device driver 138 * inventing its own way of doing this. While it does violate style(9) 139 * in a number of ways, this violation is deemed to be less 140 * important than the benefits that a uniform API between releases 141 * gives. 142 * 143 * Users of struct thread/struct proc that aren't device drivers should 144 * not use d_thread_t. 145 */ 146 147typedef struct thread d_thread_t; 148 149typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td); 150typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td); 151typedef void d_strategy_t(struct bio *bp); 152typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data, 153 int fflag, struct thread *td); 154typedef int d_psize_t(dev_t dev); 155 156typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag); 157typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag); 158typedef int d_poll_t(dev_t dev, int events, struct thread *td); 159typedef int d_kqfilter_t(dev_t dev, struct knote *kn); 160typedef int d_mmap_t(dev_t dev, vm_offset_t offset, vm_offset_t *paddr, 161 int nprot); 162 163typedef int l_open_t(dev_t dev, struct tty *tp); 164typedef int l_close_t(struct tty *tp, int flag); 165typedef int l_read_t(struct tty *tp, struct uio *uio, int flag); 166typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 167typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, 168 int flag, struct thread *td); 169typedef int l_rint_t(int c, struct tty *tp); 170typedef int l_start_t(struct tty *tp); 171typedef int l_modem_t(struct tty *tp, int flag); 172 173typedef int dumper_t( 174 void *priv, /* Private to the driver. */ 175 void *virtual, /* Virtual (mapped) address. */ 176 vm_offset_t physical, /* Physical address of virtual. */ 177 off_t offset, /* Byte-offset to write at. */ 178 size_t length); /* Number of bytes to dump. */ 179 180#define BIO_STRATEGY(bp) \ 181 do { \ 182 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \ 183 Debugger("bio_cmd botch"); \ 184 (*devsw((bp)->bio_dev)->d_strategy)(bp); \ 185 } while (0) 186 187#define DEV_STRATEGY(bp) \ 188 do { \ 189 if ((bp)->b_flags & B_PHYS) \ 190 (bp)->b_io.bio_offset = (bp)->b_offset; \ 191 else \ 192 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \ 193 (bp)->b_io.bio_done = bufdonebio; \ 194 (bp)->b_io.bio_caller2 = (bp); \ 195 BIO_STRATEGY(&(bp)->b_io); \ 196 } while (0) 197 198#endif /* _KERNEL */ 199 200/* 201 * Types for d_flags. 202 */ 203#define D_TAPE 0x0001 204#define D_DISK 0x0002 205#define D_TTY 0x0004 206#define D_MEM 0x0008 207 208#ifdef _KERNEL 209 210#define D_TYPEMASK 0xffff 211 212/* 213 * Flags for d_flags. 214 */ 215#define D_MEMDISK 0x00010000 /* memory type disk */ 216#define D_NAGGED 0x00020000 /* nagged about missing make_dev() */ 217#define D_TRACKCLOSE 0x00080000 /* track all closes */ 218#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */ 219#define D_KQFILTER 0x00200000 /* has kqfilter entry */ 220#define D_NOGIANT 0x00400000 /* Doesn't want Giant */ 221 222/* 223 * Character device switch table 224 */ 225struct cdevsw { 226 d_open_t *d_open; 227 d_close_t *d_close; 228 d_read_t *d_read; 229 d_write_t *d_write; 230 d_ioctl_t *d_ioctl; 231 d_poll_t *d_poll; 232 d_mmap_t *d_mmap; 233 d_strategy_t *d_strategy; 234 const char *d_name; /* base device name, e.g. 'vn' */ 235 int d_maj; 236 dumper_t *d_dump; 237 d_psize_t *d_psize; 238 u_int d_flags; 239 /* additions below are not binary compatible with 4.2 and below */ 240 d_kqfilter_t *d_kqfilter; 241}; 242 243/* 244 * Line discipline switch table 245 */ 246struct linesw { 247 l_open_t *l_open; 248 l_close_t *l_close; 249 l_read_t *l_read; 250 l_write_t *l_write; 251 l_ioctl_t *l_ioctl; 252 l_rint_t *l_rint; 253 l_start_t *l_start; 254 l_modem_t *l_modem; 255 u_char l_hotchar; 256}; 257 258extern struct linesw linesw[]; 259extern int nlinesw; 260 261int ldisc_register(int , struct linesw *); 262void ldisc_deregister(int); 263#define LDISC_LOAD -1 /* Loadable line discipline */ 264#endif /* _KERNEL */ 265 266#ifdef _KERNEL 267d_open_t noopen; 268d_close_t noclose; 269d_read_t noread; 270d_write_t nowrite; 271d_ioctl_t noioctl; 272d_mmap_t nommap; 273d_kqfilter_t nokqfilter; 274#define nostrategy ((d_strategy_t *)NULL) 275#define nopoll seltrue 276 277dumper_t nodump; 278 279#define NUMCDEVSW 256 280 281#define MAJOR_AUTO -1 /* XXX: Not GM */ 282 283/* 284 * nopsize is little used, so not worth having dummy functions for. 285 */ 286#define nopsize ((d_psize_t *)NULL) 287 288d_open_t nullopen; 289d_close_t nullclose; 290 291l_ioctl_t l_nullioctl; 292l_read_t l_noread; 293l_write_t l_nowrite; 294 295struct module; 296 297struct devsw_module_data { 298 int (*chainevh)(struct module *, int, void *); /* next handler */ 299 void *chainarg; /* arg for next event handler */ 300 /* Do not initialize fields hereafter */ 301}; 302 303#define DEV_MODULE(name, evh, arg) \ 304static moduledata_t name##_mod = { \ 305 #name, \ 306 evh, \ 307 arg \ 308}; \ 309DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 310 311 312int count_dev(dev_t _dev); 313void destroy_dev(dev_t _dev); 314void revoke_and_destroy_dev(dev_t _dev); 315struct cdevsw *devsw(dev_t _dev); 316const char *devtoname(dev_t _dev); 317int dev_named(dev_t _pdev, const char *_name); 318void dev_depends(dev_t _pdev, dev_t _cdev); 319void freedev(dev_t _dev); 320dev_t makebdev(int _maj, int _min); 321dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid, 322 int _perms, const char *_fmt, ...) __printflike(6, 7); 323dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3); 324int dev2unit(dev_t _dev); 325int unit2minor(int _unit); 326void setconf(void); 327dev_t getdiskbyname(char *_name); 328 329/* This is type of the function DEVFS uses to hook into the kernel with */ 330typedef void devfs_create_t(dev_t dev); 331typedef void devfs_destroy_t(dev_t dev); 332 333extern devfs_create_t *devfs_create_hook; 334extern devfs_destroy_t *devfs_destroy_hook; 335 336#define UID_ROOT 0 337#define UID_BIN 3 338#define UID_UUCP 66 339 340#define GID_WHEEL 0 341#define GID_KMEM 2 342#define GID_OPERATOR 5 343#define GID_BIN 7 344#define GID_GAMES 13 345#define GID_DIALER 68 346 347typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result); 348 349int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 350EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 351 352/* Stuff relating to kernel-dump */ 353 354struct dumperinfo { 355 dumper_t *dumper; /* Dumping function. */ 356 void *priv; /* Private parts. */ 357 u_int blocksize; /* Size of block in bytes. */ 358 off_t mediaoffset; /* Initial offset in bytes. */ 359 off_t mediasize; /* Space available in bytes. */ 360}; 361 362int set_dumper(struct dumperinfo *); 363void dumpsys(struct dumperinfo *); 364extern int dumping; /* system is dumping */ 365 366#endif /* _KERNEL */ 367 368#endif /* !_SYS_CONF_H_ */ 369