conf.h revision 274366
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 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)conf.h 8.5 (Berkeley) 1/9/95 37 * $FreeBSD: head/sys/sys/conf.h 274366 2014-11-11 04:48:09Z pjd $ 38 */ 39 40#ifndef _SYS_CONF_H_ 41#define _SYS_CONF_H_ 42 43#ifdef _KERNEL 44#include <sys/eventhandler.h> 45#else 46#include <sys/queue.h> 47#endif 48 49struct snapdata; 50struct devfs_dirent; 51struct cdevsw; 52struct file; 53 54struct cdev { 55 void *si_spare0; 56 u_int si_flags; 57#define SI_ETERNAL 0x0001 /* never destroyed */ 58#define SI_ALIAS 0x0002 /* carrier of alias name */ 59#define SI_NAMED 0x0004 /* make_dev{_alias} has been called */ 60#define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */ 61#define SI_CHILD 0x0010 /* child of another struct cdev **/ 62#define SI_DUMPDEV 0x0080 /* is kernel dumpdev */ 63#define SI_CLONELIST 0x0200 /* on a clone list */ 64#define SI_UNMAPPED 0x0400 /* can handle unmapped I/O */ 65#define SI_NOSPLIT 0x0800 /* I/O should not be split up */ 66 struct timespec si_atime; 67 struct timespec si_ctime; 68 struct timespec si_mtime; 69 uid_t si_uid; 70 gid_t si_gid; 71 mode_t si_mode; 72 struct ucred *si_cred; /* cached clone-time credential */ 73 int si_drv0; 74 int si_refcount; 75 LIST_ENTRY(cdev) si_list; 76 LIST_ENTRY(cdev) si_clone; 77 LIST_HEAD(, cdev) si_children; 78 LIST_ENTRY(cdev) si_siblings; 79 struct cdev *si_parent; 80 struct mount *si_mountpt; 81 void *si_drv1, *si_drv2; 82 struct cdevsw *si_devsw; 83 int si_iosize_max; /* maximum I/O size (for physio &al) */ 84 u_long si_usecount; 85 u_long si_threadcount; 86 union { 87 struct snapdata *__sid_snapdata; 88 } __si_u; 89 char si_name[SPECNAMELEN + 1]; 90}; 91 92#define si_snapdata __si_u.__sid_snapdata 93 94#ifdef _KERNEL 95 96/* 97 * Definitions of device driver entry switches 98 */ 99 100struct bio; 101struct buf; 102struct thread; 103struct uio; 104struct knote; 105struct clonedevs; 106struct vm_object; 107struct vnode; 108 109/* 110 * Note: d_thread_t is provided as a transition aid for those drivers 111 * that treat struct proc/struct thread as an opaque data type and 112 * exist in substantially the same form in both 4.x and 5.x. Writers 113 * of drivers that dips into the d_thread_t structure should use 114 * struct thread or struct proc as appropriate for the version of the 115 * OS they are using. It is provided in lieu of each device driver 116 * inventing its own way of doing this. While it does violate style(9) 117 * in a number of ways, this violation is deemed to be less 118 * important than the benefits that a uniform API between releases 119 * gives. 120 * 121 * Users of struct thread/struct proc that aren't device drivers should 122 * not use d_thread_t. 123 */ 124 125typedef struct thread d_thread_t; 126 127typedef int d_open_t(struct cdev *dev, int oflags, int devtype, struct thread *td); 128typedef int d_fdopen_t(struct cdev *dev, int oflags, struct thread *td, struct file *fp); 129typedef int d_close_t(struct cdev *dev, int fflag, int devtype, struct thread *td); 130typedef void d_strategy_t(struct bio *bp); 131typedef int d_ioctl_t(struct cdev *dev, u_long cmd, caddr_t data, 132 int fflag, struct thread *td); 133 134typedef int d_read_t(struct cdev *dev, struct uio *uio, int ioflag); 135typedef int d_write_t(struct cdev *dev, struct uio *uio, int ioflag); 136typedef int d_poll_t(struct cdev *dev, int events, struct thread *td); 137typedef int d_kqfilter_t(struct cdev *dev, struct knote *kn); 138typedef int d_mmap_t(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, 139 int nprot, vm_memattr_t *memattr); 140typedef int d_mmap_single_t(struct cdev *cdev, vm_ooffset_t *offset, 141 vm_size_t size, struct vm_object **object, int nprot); 142typedef void d_purge_t(struct cdev *dev); 143 144typedef int dumper_t( 145 void *_priv, /* Private to the driver. */ 146 void *_virtual, /* Virtual (mapped) address. */ 147 vm_offset_t _physical, /* Physical address of virtual. */ 148 off_t _offset, /* Byte-offset to write at. */ 149 size_t _length); /* Number of bytes to dump. */ 150 151#endif /* _KERNEL */ 152 153/* 154 * Types for d_flags. 155 */ 156#define D_TAPE 0x0001 157#define D_DISK 0x0002 158#define D_TTY 0x0004 159#define D_MEM 0x0008 160 161#ifdef _KERNEL 162 163#define D_TYPEMASK 0xffff 164 165/* 166 * Flags for d_flags which the drivers can set. 167 */ 168#define D_TRACKCLOSE 0x00080000 /* track all closes */ 169#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */ 170#define D_NEEDGIANT 0x00400000 /* driver want Giant */ 171#define D_NEEDMINOR 0x00800000 /* driver uses clone_create() */ 172 173/* 174 * Version numbers. 175 */ 176#define D_VERSION_00 0x20011966 177#define D_VERSION_01 0x17032005 /* Add d_uid,gid,mode & kind */ 178#define D_VERSION_02 0x28042009 /* Add d_mmap_single */ 179#define D_VERSION_03 0x17122009 /* d_mmap takes memattr,vm_ooffset_t */ 180#define D_VERSION D_VERSION_03 181 182/* 183 * Flags used for internal housekeeping 184 */ 185#define D_INIT 0x80000000 /* cdevsw initialized */ 186 187/* 188 * Character device switch table 189 */ 190struct cdevsw { 191 int d_version; 192 u_int d_flags; 193 const char *d_name; 194 d_open_t *d_open; 195 d_fdopen_t *d_fdopen; 196 d_close_t *d_close; 197 d_read_t *d_read; 198 d_write_t *d_write; 199 d_ioctl_t *d_ioctl; 200 d_poll_t *d_poll; 201 d_mmap_t *d_mmap; 202 d_strategy_t *d_strategy; 203 dumper_t *d_dump; 204 d_kqfilter_t *d_kqfilter; 205 d_purge_t *d_purge; 206 d_mmap_single_t *d_mmap_single; 207 208 int32_t d_spare0[3]; 209 void *d_spare1[3]; 210 211 /* These fields should not be messed with by drivers */ 212 LIST_HEAD(, cdev) d_devs; 213 int d_spare2; 214 union { 215 struct cdevsw *gianttrick; 216 SLIST_ENTRY(cdevsw) postfree_list; 217 } __d_giant; 218}; 219#define d_gianttrick __d_giant.gianttrick 220#define d_postfree_list __d_giant.postfree_list 221 222struct module; 223 224struct devsw_module_data { 225 int (*chainevh)(struct module *, int, void *); /* next handler */ 226 void *chainarg; /* arg for next event handler */ 227 /* Do not initialize fields hereafter */ 228}; 229 230#define DEV_MODULE_ORDERED(name, evh, arg, ord) \ 231static moduledata_t name##_mod = { \ 232 #name, \ 233 evh, \ 234 arg \ 235}; \ 236DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, ord) 237 238#define DEV_MODULE(name, evh, arg) \ 239 DEV_MODULE_ORDERED(name, evh, arg, SI_ORDER_MIDDLE) 240 241void clone_setup(struct clonedevs **cdp); 242void clone_cleanup(struct clonedevs **); 243#define CLONE_UNITMASK 0xfffff 244#define CLONE_FLAG0 (CLONE_UNITMASK + 1) 245int clone_create(struct clonedevs **, struct cdevsw *, int *unit, struct cdev **dev, int extra); 246 247int count_dev(struct cdev *_dev); 248void destroy_dev(struct cdev *_dev); 249int destroy_dev_sched(struct cdev *dev); 250int destroy_dev_sched_cb(struct cdev *dev, void (*cb)(void *), void *arg); 251void destroy_dev_drain(struct cdevsw *csw); 252void drain_dev_clone_events(void); 253struct cdevsw *dev_refthread(struct cdev *_dev, int *_ref); 254struct cdevsw *devvn_refthread(struct vnode *vp, struct cdev **devp, int *_ref); 255void dev_relthread(struct cdev *_dev, int _ref); 256void dev_depends(struct cdev *_pdev, struct cdev *_cdev); 257void dev_ref(struct cdev *dev); 258void dev_refl(struct cdev *dev); 259void dev_rel(struct cdev *dev); 260void dev_strategy(struct cdev *dev, struct buf *bp); 261void dev_strategy_csw(struct cdev *dev, struct cdevsw *csw, struct buf *bp); 262struct cdev *make_dev(struct cdevsw *_devsw, int _unit, uid_t _uid, gid_t _gid, 263 int _perms, const char *_fmt, ...) __printflike(6, 7); 264struct cdev *make_dev_cred(struct cdevsw *_devsw, int _unit, 265 struct ucred *_cr, uid_t _uid, gid_t _gid, int _perms, 266 const char *_fmt, ...) __printflike(7, 8); 267#define MAKEDEV_REF 0x01 268#define MAKEDEV_WHTOUT 0x02 269#define MAKEDEV_NOWAIT 0x04 270#define MAKEDEV_WAITOK 0x08 271#define MAKEDEV_ETERNAL 0x10 272#define MAKEDEV_CHECKNAME 0x20 273struct cdev *make_dev_credf(int _flags, 274 struct cdevsw *_devsw, int _unit, 275 struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode, 276 const char *_fmt, ...) __printflike(8, 9); 277int make_dev_p(int _flags, struct cdev **_cdev, struct cdevsw *_devsw, 278 struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode, 279 const char *_fmt, ...) __printflike(8, 9); 280struct cdev *make_dev_alias(struct cdev *_pdev, const char *_fmt, ...) 281 __printflike(2, 3); 282int make_dev_alias_p(int _flags, struct cdev **_cdev, struct cdev *_pdev, 283 const char *_fmt, ...) __printflike(4, 5); 284int make_dev_physpath_alias(int _flags, struct cdev **_cdev, 285 struct cdev *_pdev, struct cdev *_old_alias, 286 const char *_physpath); 287void dev_lock(void); 288void dev_unlock(void); 289void setconf(void); 290 291#ifdef KLD_MODULE 292#define MAKEDEV_ETERNAL_KLD 0 293#else 294#define MAKEDEV_ETERNAL_KLD MAKEDEV_ETERNAL 295#endif 296 297#define dev2unit(d) ((d)->si_drv0) 298 299typedef void (*cdevpriv_dtr_t)(void *data); 300int devfs_get_cdevpriv(void **datap); 301int devfs_set_cdevpriv(void *priv, cdevpriv_dtr_t dtr); 302void devfs_clear_cdevpriv(void); 303void devfs_fpdrop(struct file *fp); /* XXX This is not public KPI */ 304 305ino_t devfs_alloc_cdp_inode(void); 306void devfs_free_cdp_inode(ino_t ino); 307 308#define UID_ROOT 0 309#define UID_BIN 3 310#define UID_UUCP 66 311#define UID_NOBODY 65534 312 313#define GID_WHEEL 0 314#define GID_KMEM 2 315#define GID_TTY 4 316#define GID_OPERATOR 5 317#define GID_BIN 7 318#define GID_GAMES 13 319#define GID_DIALER 68 320#define GID_NOBODY 65534 321 322typedef void (*dev_clone_fn)(void *arg, struct ucred *cred, char *name, 323 int namelen, struct cdev **result); 324 325int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit); 326EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn); 327 328/* Stuff relating to kernel-dump */ 329 330struct dumperinfo { 331 dumper_t *dumper; /* Dumping function. */ 332 void *priv; /* Private parts. */ 333 u_int blocksize; /* Size of block in bytes. */ 334 u_int maxiosize; /* Max size allowed for an individual I/O */ 335 off_t mediaoffset; /* Initial offset in bytes. */ 336 off_t mediasize; /* Space available in bytes. */ 337}; 338 339int set_dumper(struct dumperinfo *, const char *_devname, struct thread *td); 340int dump_write(struct dumperinfo *, void *, vm_offset_t, off_t, size_t); 341int dumpsys(struct dumperinfo *); 342int doadump(boolean_t); 343extern int dumping; /* system is dumping */ 344 345#endif /* _KERNEL */ 346 347#endif /* !_SYS_CONF_H_ */ 348