conf.h revision 120508
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 120508 2003-09-27 12:09:25Z 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 mount *__sid_mountpoint; 93 int __sid_bsize_phys; /* min physical block size */ 94 int __sid_bsize_best; /* optimal block size */ 95 struct snaphead __sid_snapshots; 96 daddr_t __sid_snaplistsize; /* size of snapblklist. */ 97 daddr_t *__sid_snapblklist; /* known snapshot blocks. */ 98 int (*__sid_copyonwrite)(struct vnode *, struct buf *); 99 } __si_disk; 100 } __si_u; 101 char __si_namebuf[SPECNAMELEN + 1]; 102}; 103 104#define si_tty __si_u.__si_tty.__sit_tty 105#define si_mountpoint __si_u.__si_disk.__sid_mountpoint 106#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 107#define si_bsize_best __si_u.__si_disk.__sid_bsize_best 108#define si_snapshots __si_u.__si_disk.__sid_snapshots 109#define si_snaplistsize __si_u.__si_disk.__sid_snaplistsize 110#define si_snapblklist __si_u.__si_disk.__sid_snapblklist 111#define si_copyonwrite __si_u.__si_disk.__sid_copyonwrite 112 113/* 114 * Special device management 115 */ 116#define SPECHSZ 64 117#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 118 119/* 120 * Definitions of device driver entry switches 121 */ 122 123struct bio; 124struct buf; 125struct thread; 126struct uio; 127struct knote; 128 129/* 130 * Note: d_thread_t is provided as a transition aid for those drivers 131 * that treat struct proc/struct thread as an opaque data type and 132 * exist in substantially the same form in both 4.x and 5.x. Writers 133 * of drivers that dips into the d_thread_t structure should use 134 * struct thread or struct proc as appropriate for the version of the 135 * OS they are using. It is provided in lieu of each device driver 136 * inventing its own way of doing this. While it does violate style(9) 137 * in a number of ways, this violation is deemed to be less 138 * important than the benefits that a uniform API between releases 139 * gives. 140 * 141 * Users of struct thread/struct proc that aren't device drivers should 142 * not use d_thread_t. 143 */ 144 145typedef struct thread d_thread_t; 146 147typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td); 148typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td); 149typedef void d_strategy_t(struct bio *bp); 150typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data, 151 int fflag, struct thread *td); 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, vm_paddr_t *paddr, 158 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 170typedef int dumper_t( 171 void *priv, /* Private to the driver. */ 172 void *virtual, /* Virtual (mapped) address. */ 173 vm_offset_t physical, /* Physical address of virtual. */ 174 off_t offset, /* Byte-offset to write at. */ 175 size_t length); /* Number of bytes to dump. */ 176 177#define BIO_STRATEGY(bp) \ 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) \ 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); \ 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_TRACKCLOSE 0x00080000 /* track all closes */ 215#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */ 216#define D_NOGIANT 0x00400000 /* Doesn't want Giant */ 217 218/* 219 * Character device switch table 220 */ 221struct cdevsw { 222 int d_maj; 223 u_int d_flags; 224 const char *d_name; 225 d_open_t *d_open; 226 d_close_t *d_close; 227 d_read_t *d_read; 228 d_write_t *d_write; 229 d_ioctl_t *d_ioctl; 230 d_poll_t *d_poll; 231 d_mmap_t *d_mmap; 232 d_strategy_t *d_strategy; 233 dumper_t *d_dump; 234 d_kqfilter_t *d_kqfilter; 235}; 236 237/* 238 * Line discipline switch table 239 */ 240struct linesw { 241 l_open_t *l_open; 242 l_close_t *l_close; 243 l_read_t *l_read; 244 l_write_t *l_write; 245 l_ioctl_t *l_ioctl; 246 l_rint_t *l_rint; 247 l_start_t *l_start; 248 l_modem_t *l_modem; 249 u_char l_hotchar; 250}; 251 252extern struct linesw linesw[]; 253extern int nlinesw; 254 255int ldisc_register(int , struct linesw *); 256void ldisc_deregister(int); 257#define LDISC_LOAD -1 /* Loadable line discipline */ 258#endif /* _KERNEL */ 259 260#ifdef _KERNEL 261d_read_t noread; 262d_write_t nowrite; 263d_ioctl_t noioctl; 264d_mmap_t nommap; 265d_kqfilter_t nokqfilter; 266#define nostrategy ((d_strategy_t *)NULL) 267#define nopoll seltrue 268 269dumper_t nodump; 270 271#define NUMCDEVSW 256 272 273#define MAJOR_AUTO 0 /* XXX: Not GM */ 274 275d_open_t nullopen; 276d_close_t nullclose; 277 278l_ioctl_t l_nullioctl; 279l_read_t l_noread; 280l_write_t l_nowrite; 281 282struct module; 283 284struct devsw_module_data { 285 int (*chainevh)(struct module *, int, void *); /* next handler */ 286 void *chainarg; /* arg for next event handler */ 287 /* Do not initialize fields hereafter */ 288}; 289 290#define DEV_MODULE(name, evh, arg) \ 291static moduledata_t name##_mod = { \ 292 #name, \ 293 evh, \ 294 arg \ 295}; \ 296DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 297 298 299int count_dev(dev_t _dev); 300void destroy_dev(dev_t _dev); 301void revoke_and_destroy_dev(dev_t _dev); 302struct cdevsw *devsw(dev_t _dev); 303const char *devtoname(dev_t _dev); 304int dev_named(dev_t _pdev, const char *_name); 305void dev_depends(dev_t _pdev, dev_t _cdev); 306void freedev(dev_t _dev); 307dev_t makebdev(int _maj, int _min); 308dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid, 309 int _perms, const char *_fmt, ...) __printflike(6, 7); 310dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3); 311int dev2unit(dev_t _dev); 312int unit2minor(int _unit); 313void setconf(void); 314dev_t getdiskbyname(char *_name); 315 316void devfs_create(dev_t dev); 317void devfs_destroy(dev_t dev); 318 319#define UID_ROOT 0 320#define UID_BIN 3 321#define UID_UUCP 66 322 323#define GID_WHEEL 0 324#define GID_KMEM 2 325#define GID_OPERATOR 5 326#define GID_BIN 7 327#define GID_GAMES 13 328#define GID_DIALER 68 329 330typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result); 331 332int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 333EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 334 335/* Stuff relating to kernel-dump */ 336 337struct dumperinfo { 338 dumper_t *dumper; /* Dumping function. */ 339 void *priv; /* Private parts. */ 340 u_int blocksize; /* Size of block in bytes. */ 341 off_t mediaoffset; /* Initial offset in bytes. */ 342 off_t mediasize; /* Space available in bytes. */ 343}; 344 345int set_dumper(struct dumperinfo *); 346void dumpsys(struct dumperinfo *); 347extern int dumping; /* system is dumping */ 348 349#endif /* _KERNEL */ 350 351#endif /* !_SYS_CONF_H_ */ 352