conf.h revision 126077
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 126077 2004-02-21 20:29:52Z 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#define SI_CLONELIST 0x0200 /* on a clone list */ 68 struct timespec si_atime; 69 struct timespec si_ctime; 70 struct timespec si_mtime; 71 udev_t si_udev; 72 LIST_ENTRY(cdev) si_clone; 73 LIST_ENTRY(cdev) si_hash; 74 SLIST_HEAD(, vnode) si_hlist; 75 LIST_HEAD(, cdev) si_children; 76 LIST_ENTRY(cdev) si_siblings; 77 dev_t si_parent; 78 u_int si_inode; 79 char *si_name; 80 void *si_drv1, *si_drv2; 81 struct cdevsw *si_devsw; 82 int si_iosize_max; /* maximum I/O size (for physio &al) */ 83 u_int si_stripesize; 84 u_int si_stripeoffset; 85 uid_t si_uid; 86 gid_t si_gid; 87 mode_t si_mode; 88 u_long si_usecount; 89 union { 90 struct { 91 struct tty *__sit_tty; 92 } __si_tty; 93 struct { 94 struct mount *__sid_mountpoint; 95 int __sid_bsize_phys; /* min physical block size */ 96 int __sid_bsize_best; /* optimal block size */ 97 struct snaphead __sid_snapshots; 98 daddr_t __sid_snaplistsize; /* size of snapblklist. */ 99 daddr_t *__sid_snapblklist; /* known snapshot blocks. */ 100 int (*__sid_copyonwrite)(struct vnode *, struct buf *); 101 } __si_disk; 102 } __si_u; 103 char __si_namebuf[SPECNAMELEN + 1]; 104}; 105 106#define si_tty __si_u.__si_tty.__sit_tty 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; 130struct clonedevs; 131 132/* 133 * Note: d_thread_t is provided as a transition aid for those drivers 134 * that treat struct proc/struct thread as an opaque data type and 135 * exist in substantially the same form in both 4.x and 5.x. Writers 136 * of drivers that dips into the d_thread_t structure should use 137 * struct thread or struct proc as appropriate for the version of the 138 * OS they are using. It is provided in lieu of each device driver 139 * inventing its own way of doing this. While it does violate style(9) 140 * in a number of ways, this violation is deemed to be less 141 * important than the benefits that a uniform API between releases 142 * gives. 143 * 144 * Users of struct thread/struct proc that aren't device drivers should 145 * not use d_thread_t. 146 */ 147 148typedef struct thread d_thread_t; 149 150typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td); 151typedef int d_fdopen_t(dev_t dev, int oflags, struct thread *td, int fdidx); 152typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td); 153typedef void d_strategy_t(struct bio *bp); 154typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data, 155 int fflag, struct thread *td); 156 157typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag); 158typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag); 159typedef int d_poll_t(dev_t dev, int events, struct thread *td); 160typedef int d_kqfilter_t(dev_t dev, struct knote *kn); 161typedef int d_mmap_t(dev_t dev, vm_offset_t offset, vm_paddr_t *paddr, 162 int nprot); 163 164typedef int l_open_t(dev_t dev, struct tty *tp); 165typedef int l_close_t(struct tty *tp, int flag); 166typedef int l_read_t(struct tty *tp, struct uio *uio, int flag); 167typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 168typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, 169 int flag, struct thread *td); 170typedef int l_rint_t(int c, struct tty *tp); 171typedef int l_start_t(struct tty *tp); 172typedef int l_modem_t(struct tty *tp, int flag); 173 174typedef int dumper_t( 175 void *priv, /* Private to the driver. */ 176 void *virtual, /* Virtual (mapped) address. */ 177 vm_offset_t physical, /* Physical address of virtual. */ 178 off_t offset, /* Byte-offset to write at. */ 179 size_t length); /* Number of bytes to dump. */ 180 181#define DEV_STRATEGY(bp) dev_strategy(bp) 182 183#endif /* _KERNEL */ 184 185/* 186 * Types for d_flags. 187 */ 188#define D_TAPE 0x0001 189#define D_DISK 0x0002 190#define D_TTY 0x0004 191#define D_MEM 0x0008 192 193#ifdef _KERNEL 194 195#define D_TYPEMASK 0xffff 196 197/* 198 * Flags for d_flags. 199 */ 200#define D_MEMDISK 0x00010000 /* memory type disk */ 201#define D_NAGGED 0x00020000 /* nagged about missing make_dev() */ 202#define D_TRACKCLOSE 0x00080000 /* track all closes */ 203#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */ 204#define D_PSEUDO 0x00200000 /* make_dev() can return NULL */ 205#define D_NOGIANT 0x00400000 /* Doesn't want Giant */ 206 207/* 208 * Character device switch table 209 */ 210struct cdevsw { 211 int d_maj; 212 u_int d_flags; 213 const char *d_name; 214 d_open_t *d_open; 215 d_fdopen_t *d_fdopen; 216 d_close_t *d_close; 217 d_read_t *d_read; 218 d_write_t *d_write; 219 d_ioctl_t *d_ioctl; 220 d_poll_t *d_poll; 221 d_mmap_t *d_mmap; 222 d_strategy_t *d_strategy; 223 dumper_t *d_dump; 224 d_kqfilter_t *d_kqfilter; 225}; 226 227/* 228 * Line discipline switch table 229 */ 230struct linesw { 231 l_open_t *l_open; 232 l_close_t *l_close; 233 l_read_t *l_read; 234 l_write_t *l_write; 235 l_ioctl_t *l_ioctl; 236 l_rint_t *l_rint; 237 l_start_t *l_start; 238 l_modem_t *l_modem; 239 u_char l_hotchar; 240}; 241 242extern struct linesw linesw[]; 243extern int nlinesw; 244 245int ldisc_register(int , struct linesw *); 246void ldisc_deregister(int); 247#define LDISC_LOAD -1 /* Loadable line discipline */ 248#endif /* _KERNEL */ 249 250#ifdef _KERNEL 251 252#define NUMCDEVSW 256 253 254/* 255 * XXX: do not use MAJOR_AUTO unless you have no choice. In general drivers 256 * should just not initialize .d_maj and that will DTRT. 257 */ 258#define MAJOR_AUTO 0 /* XXX: Not GM */ 259 260l_ioctl_t l_nullioctl; 261l_read_t l_noread; 262l_write_t l_nowrite; 263 264struct module; 265 266struct devsw_module_data { 267 int (*chainevh)(struct module *, int, void *); /* next handler */ 268 void *chainarg; /* arg for next event handler */ 269 /* Do not initialize fields hereafter */ 270}; 271 272#define DEV_MODULE(name, evh, arg) \ 273static moduledata_t name##_mod = { \ 274 #name, \ 275 evh, \ 276 arg \ 277}; \ 278DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 279 280 281void clone_cleanup(struct clonedevs **); 282#define CLONE_UNITMASK 0xfffff 283#define CLONE_FLAG0 (CLONE_UNITMASK + 1) 284int clone_create(struct clonedevs **, struct cdevsw *, int *unit, dev_t *dev, u_int extra); 285 286int count_dev(dev_t _dev); 287void destroy_dev(dev_t _dev); 288struct cdevsw *devsw(dev_t _dev); 289const char *devtoname(dev_t _dev); 290int dev_named(dev_t _pdev, const char *_name); 291void dev_depends(dev_t _pdev, dev_t _cdev); 292void dev_strategy(struct buf *bp); 293void freedev(dev_t _dev); 294dev_t makebdev(int _maj, int _min); 295dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid, 296 int _perms, const char *_fmt, ...) __printflike(6, 7); 297dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3); 298int dev2unit(dev_t _dev); 299int unit2minor(int _unit); 300void setconf(void); 301dev_t getdiskbyname(char *_name); 302 303void devfs_create(dev_t dev); 304void devfs_destroy(dev_t dev); 305 306#define UID_ROOT 0 307#define UID_BIN 3 308#define UID_UUCP 66 309 310#define GID_WHEEL 0 311#define GID_KMEM 2 312#define GID_OPERATOR 5 313#define GID_BIN 7 314#define GID_GAMES 13 315#define GID_DIALER 68 316 317typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result); 318 319int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 320EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 321 322/* Stuff relating to kernel-dump */ 323 324struct dumperinfo { 325 dumper_t *dumper; /* Dumping function. */ 326 void *priv; /* Private parts. */ 327 u_int blocksize; /* Size of block in bytes. */ 328 off_t mediaoffset; /* Initial offset in bytes. */ 329 off_t mediasize; /* Space available in bytes. */ 330}; 331 332int set_dumper(struct dumperinfo *); 333void dumpsys(struct dumperinfo *); 334extern int dumping; /* system is dumping */ 335 336#endif /* _KERNEL */ 337 338#endif /* !_SYS_CONF_H_ */ 339