conf.h revision 107848
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 107848 2002-12-14 01:36:59Z mckusick $ 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[SPECNAMELEN + 1]; 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}; 100 101#define si_tty __si_u.__si_tty.__sit_tty 102#define si_disk __si_u.__si_disk.__sid_disk 103#define si_mountpoint __si_u.__si_disk.__sid_mountpoint 104#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 105#define si_bsize_best __si_u.__si_disk.__sid_bsize_best 106#define si_snapshots __si_u.__si_disk.__sid_snapshots 107#define si_snaplistsize __si_u.__si_disk.__sid_snaplistsize 108#define si_snapblklist __si_u.__si_disk.__sid_snapblklist 109#define si_copyonwrite __si_u.__si_disk.__sid_copyonwrite 110 111/* 112 * Special device management 113 */ 114#define SPECHSZ 64 115#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 116 117/* 118 * Definitions of device driver entry switches 119 */ 120 121struct bio; 122struct buf; 123struct thread; 124struct uio; 125struct knote; 126 127/* 128 * Note: d_thread_t is provided as a transition aid for those drivers 129 * that treat struct proc/struct thread as an opaque data type and 130 * exist in substantially the same form in both 4.x and 5.x. Writers 131 * of drivers that dips into the d_thread_t structure should use 132 * struct thread or struct proc as appropriate for the version of the 133 * OS they are using. It is provided in lieu of each device driver 134 * inventing its own way of doing this. While it does violate style(9) 135 * in a number of ways, this violation is deemed to be less 136 * important than the benefits that a uniform API between releases 137 * gives. 138 * 139 * Users of struct thread/struct proc that aren't device drivers should 140 * not use d_thread_t. 141 */ 142 143typedef struct thread d_thread_t; 144 145typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td); 146typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td); 147typedef void d_strategy_t(struct bio *bp); 148typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data, 149 int fflag, struct thread *td); 150typedef int d_dump_t(dev_t dev,void *virtual, vm_offset_t physical, off_t offset, size_t length); 151typedef int d_psize_t(dev_t dev); 152 153typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag); 154typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag); 155typedef int d_poll_t(dev_t dev, int events, struct thread *td); 156typedef int d_kqfilter_t(dev_t dev, struct knote *kn); 157typedef int d_mmap_t(dev_t dev, vm_offset_t offset, int nprot); 158 159typedef int l_open_t(dev_t dev, struct tty *tp); 160typedef int l_close_t(struct tty *tp, int flag); 161typedef int l_read_t(struct tty *tp, struct uio *uio, int flag); 162typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 163typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, 164 int flag, struct thread *td); 165typedef int l_rint_t(int c, struct tty *tp); 166typedef int l_start_t(struct tty *tp); 167typedef int l_modem_t(struct tty *tp, int flag); 168 169/* 170 * XXX: The dummy argument can be used to do what strategy1() never 171 * did anywhere: Create a per device flag to lock the device during 172 * label/slice surgery, all calls with a dummy == 0 gets stalled on 173 * a queue somewhere, whereas dummy == 1 are let through. Once out 174 * of surgery, reset the flag and restart all the stuff on the stall 175 * queue. 176 */ 177#define BIO_STRATEGY(bp, dummy) \ 178 do { \ 179 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \ 180 Debugger("bio_cmd botch"); \ 181 (*devsw((bp)->bio_dev)->d_strategy)(bp); \ 182 } while (0) 183 184#define DEV_STRATEGY(bp, dummy) \ 185 do { \ 186 if ((bp)->b_flags & B_PHYS) \ 187 (bp)->b_io.bio_offset = (bp)->b_offset; \ 188 else \ 189 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \ 190 (bp)->b_io.bio_done = bufdonebio; \ 191 (bp)->b_io.bio_caller2 = (bp); \ 192 BIO_STRATEGY(&(bp)->b_io, dummy); \ 193 } while (0) 194 195#endif /* _KERNEL */ 196 197/* 198 * Types for d_flags. 199 */ 200#define D_TAPE 0x0001 201#define D_DISK 0x0002 202#define D_TTY 0x0004 203#define D_MEM 0x0008 204 205#ifdef _KERNEL 206 207#define D_TYPEMASK 0xffff 208 209/* 210 * Flags for d_flags. 211 */ 212#define D_MEMDISK 0x00010000 /* memory type disk */ 213#define D_NAGGED 0x00020000 /* nagged about missing make_dev() */ 214#define D_CANFREE 0x00040000 /* can free blocks */ 215#define D_TRACKCLOSE 0x00080000 /* track all closes */ 216#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */ 217#define D_KQFILTER 0x00200000 /* has kqfilter entry */ 218#define D_NOGIANT 0x00400000 /* Doesn't want Giant */ 219 220/* 221 * Character device switch table 222 */ 223struct cdevsw { 224 d_open_t *d_open; 225 d_close_t *d_close; 226 d_read_t *d_read; 227 d_write_t *d_write; 228 d_ioctl_t *d_ioctl; 229 d_poll_t *d_poll; 230 d_mmap_t *d_mmap; 231 d_strategy_t *d_strategy; 232 const char *d_name; /* base device name, e.g. 'vn' */ 233 int d_maj; 234 d_dump_t *d_dump; 235 d_psize_t *d_psize; 236 u_int d_flags; 237 /* additions below are not binary compatible with 4.2 and below */ 238 d_kqfilter_t *d_kqfilter; 239}; 240 241/* 242 * Line discipline switch table 243 */ 244struct linesw { 245 l_open_t *l_open; 246 l_close_t *l_close; 247 l_read_t *l_read; 248 l_write_t *l_write; 249 l_ioctl_t *l_ioctl; 250 l_rint_t *l_rint; 251 l_start_t *l_start; 252 l_modem_t *l_modem; 253 u_char l_hotchar; 254}; 255 256extern struct linesw linesw[]; 257extern int nlinesw; 258 259int ldisc_register(int , struct linesw *); 260void ldisc_deregister(int); 261#define LDISC_LOAD -1 /* Loadable line discipline */ 262#endif /* _KERNEL */ 263 264/* 265 * Swap device table 266 */ 267struct swdevt { 268 udev_t sw_dev; /* For quasibogus swapdev reporting */ 269 int sw_flags; 270 int sw_nblks; 271 int sw_used; 272 struct vnode *sw_vp; 273 dev_t sw_device; 274}; 275#define SW_FREED 0x01 276#define SW_SEQUENTIAL 0x02 277#define sw_freed sw_flags /* XXX compat */ 278 279#ifdef _KERNEL 280d_open_t noopen; 281d_close_t noclose; 282d_read_t noread; 283d_write_t nowrite; 284d_ioctl_t noioctl; 285d_mmap_t nommap; 286d_kqfilter_t nokqfilter; 287#define nostrategy ((d_strategy_t *)NULL) 288#define nopoll seltrue 289 290d_dump_t nodump; 291 292#define NUMCDEVSW 256 293 294/* 295 * nopsize is little used, so not worth having dummy functions for. 296 */ 297#define nopsize ((d_psize_t *)NULL) 298 299d_open_t nullopen; 300d_close_t nullclose; 301 302l_ioctl_t l_nullioctl; 303l_read_t l_noread; 304l_write_t l_nowrite; 305 306struct module; 307 308struct devsw_module_data { 309 int (*chainevh)(struct module *, int, void *); /* next handler */ 310 void *chainarg; /* arg for next event handler */ 311 /* Do not initialize fields hereafter */ 312}; 313 314#define DEV_MODULE(name, evh, arg) \ 315static moduledata_t name##_mod = { \ 316 #name, \ 317 evh, \ 318 arg \ 319}; \ 320DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 321 322 323int cdevsw_add(struct cdevsw *_new); 324int cdevsw_remove(struct cdevsw *_old); 325int count_dev(dev_t _dev); 326void destroy_dev(dev_t _dev); 327void revoke_and_destroy_dev(dev_t _dev); 328struct cdevsw *devsw(dev_t _dev); 329const char *devtoname(dev_t _dev); 330int dev_named(dev_t _pdev, const char *_name); 331void dev_depends(dev_t _pdev, dev_t _cdev); 332void freedev(dev_t _dev); 333int iszerodev(dev_t _dev); 334dev_t makebdev(int _maj, int _min); 335dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid, 336 int _perms, const char *_fmt, ...) __printflike(6, 7); 337dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3); 338int dev2unit(dev_t _dev); 339int unit2minor(int _unit); 340void setconf(void); 341dev_t getdiskbyname(char *_name); 342 343/* This is type of the function DEVFS uses to hook into the kernel with */ 344typedef void devfs_create_t(dev_t dev); 345typedef void devfs_destroy_t(dev_t dev); 346 347extern devfs_create_t *devfs_create_hook; 348extern devfs_destroy_t *devfs_destroy_hook; 349extern int devfs_present; 350 351#define UID_ROOT 0 352#define UID_BIN 3 353#define UID_UUCP 66 354 355#define GID_WHEEL 0 356#define GID_KMEM 2 357#define GID_OPERATOR 5 358#define GID_BIN 7 359#define GID_GAMES 13 360#define GID_DIALER 68 361 362typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result); 363 364int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 365EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 366 367/* Stuff relating to kernel-dump */ 368 369typedef int dumper_t( 370 void *priv, /* Private to the driver. */ 371 void *virtual, /* Virtual (mapped) address. */ 372 vm_offset_t physical, /* Physical address of virtual. */ 373 off_t offset, /* Byte-offset to write at. */ 374 size_t length); /* Number of bytes to dump. */ 375 376struct dumperinfo { 377 dumper_t *dumper; /* Dumping function. */ 378 void *priv; /* Private parts. */ 379 u_int blocksize; /* Size of block in bytes. */ 380 off_t mediaoffset; /* Initial offset in bytes. */ 381 off_t mediasize; /* Space available in bytes. */ 382}; 383 384int set_dumper(struct dumperinfo *); 385void dumpsys(struct dumperinfo *); 386extern int dumping; /* system is dumping */ 387 388#endif /* _KERNEL */ 389 390#endif /* !_SYS_CONF_H_ */ 391