Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/conf.h
Version:
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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: releng/5.1/sys/sys/conf.h 112569 2003-03-25 00:07:06Z jake $ 42 */ 43 44 #ifndef _SYS_CONF_H_ 45 #define _SYS_CONF_H_ 46 47 #ifdef _KERNEL 48 #include <sys/eventhandler.h> 49 50 struct tty; 51 struct disk; 52 struct vnode; 53 struct buf; 54 TAILQ_HEAD(snaphead, inode); 55 56 struct 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 */ 122 123 struct bio; 124 struct buf; 125 struct thread; 126 struct uio; 127 struct 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 */ 144 145 typedef struct thread d_thread_t; 146 147 typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td); 148 typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td); 149 typedef void d_strategy_t(struct bio *bp); 150 typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data, 151 int fflag, struct thread *td); 152 153 typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag); 154 typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag); 155 typedef int d_poll_t(dev_t dev, int events, struct thread *td); 156 typedef int d_kqfilter_t(dev_t dev, struct knote *kn); 157 typedef int d_mmap_t(dev_t dev, vm_offset_t offset, vm_paddr_t *paddr, 158 int nprot); 159 160 typedef int l_open_t(dev_t dev, struct tty *tp); 161 typedef int l_close_t(struct tty *tp, int flag); 162 typedef int l_read_t(struct tty *tp, struct uio *uio, int flag); 163 typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 164 typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, 165 int flag, struct thread *td); 166 typedef int l_rint_t(int c, struct tty *tp); 167 typedef int l_start_t(struct tty *tp); 168 typedef int l_modem_t(struct tty *tp, int flag); 169 170 typedef 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 */ 221 struct 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 */ 240 struct 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 }; 251 252 extern struct linesw linesw[]; 253 extern int nlinesw; 254 255 int ldisc_register(int , struct linesw *); 256 void ldisc_deregister(int); 257 #define LDISC_LOAD -1 /* Loadable line discipline */ 258 #endif /* _KERNEL */ 259 260 #ifdef _KERNEL 261 d_open_t noopen; 262 d_close_t noclose; 263 d_read_t noread; 264 d_write_t nowrite; 265 d_ioctl_t noioctl; 266 d_mmap_t nommap; 267 d_kqfilter_t nokqfilter; 268 #define nostrategy ((d_strategy_t *)NULL) 269 #define nopoll seltrue 270 271 dumper_t nodump; 272 273 #define NUMCDEVSW 256 274 275 #define MAJOR_AUTO 0 /* XXX: Not GM */ 276 277 /* 278 * nopsize is little used, so not worth having dummy functions for. 279 */ 280 #define nopsize (NULL) 281 282 d_open_t nullopen; 283 d_close_t nullclose; 284 285 l_ioctl_t l_nullioctl; 286 l_read_t l_noread; 287 l_write_t l_nowrite; 288 289 struct module; 290 291 struct devsw_module_data { 292 int (*chainevh)(struct module *, int, void *); /* next handler */ 293 void *chainarg; /* arg for next event handler */ 294 /* Do not initialize fields hereafter */ 295 }; 296 297 #define DEV_MODULE(name, evh, arg) \ 298 static moduledata_t name##_mod = { \ 299 #name, \ 300 evh, \ 301 arg \ 302 }; \ 303 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 304 305 306 int count_dev(dev_t _dev); 307 void destroy_dev(dev_t _dev); 308 void revoke_and_destroy_dev(dev_t _dev); 309 struct cdevsw *devsw(dev_t _dev); 310 const char *devtoname(dev_t _dev); 311 int dev_named(dev_t _pdev, const char *_name); 312 void dev_depends(dev_t _pdev, dev_t _cdev); 313 void freedev(dev_t _dev); 314 dev_t makebdev(int _maj, int _min); 315 dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid, 316 int _perms, const char *_fmt, ...) __printflike(6, 7); 317 dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3); 318 int dev2unit(dev_t _dev); 319 int unit2minor(int _unit); 320 void setconf(void); 321 dev_t getdiskbyname(char *_name); 322 323 void devfs_create(dev_t dev); 324 void devfs_destroy(dev_t dev); 325 326 #define UID_ROOT 0 327 #define UID_BIN 3 328 #define UID_UUCP 66 329 330 #define GID_WHEEL 0 331 #define GID_KMEM 2 332 #define GID_OPERATOR 5 333 #define GID_BIN 7 334 #define GID_GAMES 13 335 #define GID_DIALER 68 336 337 typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result); 338 339 int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 340 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 341 342 /* Stuff relating to kernel-dump */ 343 344 struct dumperinfo { 345 dumper_t *dumper; /* Dumping function. */ 346 void *priv; /* Private parts. */ 347 u_int blocksize; /* Size of block in bytes. */ 348 off_t mediaoffset; /* Initial offset in bytes. */ 349 off_t mediasize; /* Space available in bytes. */ 350 }; 351 352 int set_dumper(struct dumperinfo *); 353 void dumpsys(struct dumperinfo *); 354 extern int dumping; /* system is dumping */ 355 356 #endif /* _KERNEL */ 357 358 #endif /* !_SYS_CONF_H_ */
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