/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 2000
* Poul-Henning Kamp. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)conf.h 8.5 (Berkeley) 1/9/95
* $FreeBSD$
*/
#ifndef _SYS_CONF_H_
#define _SYS_CONF_H_
#ifdef _KERNEL
#include <sys/eventhandler.h>
struct tty;
struct disk;
struct vnode;
struct buf;
TAILQ_HEAD(snaphead, inode);
struct specinfo {
u_int si_flags;
#define SI_STASHED 0x0001 /* created in stashed storage */
#define SI_ALIAS 0x0002 /* carrier of alias name */
#define SI_NAMED 0x0004 /* make_dev{_alias} has been called */
#define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */
#define SI_CHILD 0x0010 /* child of another dev_t */
#define SI_DEVOPEN 0x0020 /* opened by device */
#define SI_CONSOPEN 0x0040 /* opened by console */
#define SI_DUMPDEV 0x0080 /* is kernel dumpdev */
struct timespec si_atime;
struct timespec si_ctime;
struct timespec si_mtime;
udev_t si_udev;
LIST_ENTRY(specinfo) si_hash;
SLIST_HEAD(, vnode) si_hlist;
LIST_HEAD(, specinfo) si_children;
LIST_ENTRY(specinfo) si_siblings;
dev_t si_parent;
struct snaphead si_snapshots;
int (*si_copyonwrite)(struct vnode *, struct buf *);
u_int si_inode;
char si_name[SPECNAMELEN + 1];
void *si_drv1, *si_drv2;
struct cdevsw *si_devsw;
int si_iosize_max; /* maximum I/O size (for physio &al) */
uid_t si_uid;
gid_t si_gid;
mode_t si_mode;
union {
struct {
struct tty *__sit_tty;
} __si_tty;
struct {
struct disk *__sid_disk;
struct mount *__sid_mountpoint;
int __sid_bsize_phys; /* min physical block size */
int __sid_bsize_best; /* optimal block size */
} __si_disk;
} __si_u;
};
#define si_tty __si_u.__si_tty.__sit_tty
#define si_disk __si_u.__si_disk.__sid_disk
#define si_mountpoint __si_u.__si_disk.__sid_mountpoint
#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
#define si_bsize_best __si_u.__si_disk.__sid_bsize_best
/*
* Special device management
*/
#define SPECHSZ 64
#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
/*
* Definitions of device driver entry switches
*/
struct bio;
struct buf;
struct thread;
struct uio;
struct knote;
/*
* Note: d_thread_t is provided as a transition aid for those drivers
* that treat struct proc/struct thread as an opaque data type and
* exist in substantially the same form in both 4.x and 5.x. Writers
* of drivers that dips into the d_thread_t structure should use
* struct thread or struct proc as appropriate for the version of the
* OS they are using. It is provided in lieu of each device driver
* inventing its own way of doing this. While it does violate style(9)
* in a number of ways, this violation is deemed to be less
* important than the benefits that a uniform API between releases
* gives.
*
* Users of struct thread/struct proc that aren't device drivers should
* not use d_thread_t.
*/
typedef struct thread d_thread_t;
typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td);
typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td);
typedef void d_strategy_t(struct bio *bp);
typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data,
int fflag, struct thread *td);
typedef int d_dump_t(dev_t dev,void *virtual, vm_offset_t physical, off_t offset, size_t length);
typedef int d_psize_t(dev_t dev);
typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag);
typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag);
typedef int d_poll_t(dev_t dev, int events, struct thread *td);
typedef int d_kqfilter_t(dev_t dev, struct knote *kn);
typedef int d_mmap_t(dev_t dev, vm_offset_t offset, int nprot);
typedef int l_open_t(dev_t dev, struct tty *tp);
typedef int l_close_t(struct tty *tp, int flag);
typedef int l_read_t(struct tty *tp, struct uio *uio, int flag);
typedef int l_write_t(struct tty *tp, struct uio *uio, int flag);
typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data,
int flag, struct thread *td);
typedef int l_rint_t(int c, struct tty *tp);
typedef int l_start_t(struct tty *tp);
typedef int l_modem_t(struct tty *tp, int flag);
/*
* XXX: The dummy argument can be used to do what strategy1() never
* did anywhere: Create a per device flag to lock the device during
* label/slice surgery, all calls with a dummy == 0 gets stalled on
* a queue somewhere, whereas dummy == 1 are let through. Once out
* of surgery, reset the flag and restart all the stuff on the stall
* queue.
*/
#define BIO_STRATEGY(bp, dummy) \
do { \
if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \
Debugger("bio_cmd botch"); \
(*devsw((bp)->bio_dev)->d_strategy)(bp); \
} while (0)
#define DEV_STRATEGY(bp, dummy) \
do { \
if ((bp)->b_flags & B_PHYS) \
(bp)->b_io.bio_offset = (bp)->b_offset; \
else \
(bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \
(bp)->b_io.bio_done = bufdonebio; \
(bp)->b_io.bio_caller2 = (bp); \
BIO_STRATEGY(&(bp)->b_io, dummy); \
} while (0)
#endif /* _KERNEL */
/*
* Types for d_flags.
*/
#define D_TAPE 0x0001
#define D_DISK 0x0002
#define D_TTY 0x0004
#define D_MEM 0x0008
#ifdef _KERNEL
#define D_TYPEMASK 0xffff
/*
* Flags for d_flags.
*/
#define D_MEMDISK 0x00010000 /* memory type disk */
#define D_NAGGED 0x00020000 /* nagged about missing make_dev() */
#define D_CANFREE 0x00040000 /* can free blocks */
#define D_TRACKCLOSE 0x00080000 /* track all closes */
#define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
#define D_KQFILTER 0x00200000 /* has kqfilter entry */
/*
* Character device switch table
*/
struct cdevsw {
d_open_t *d_open;
d_close_t *d_close;
d_read_t *d_read;
d_write_t *d_write;
d_ioctl_t *d_ioctl;
d_poll_t *d_poll;
d_mmap_t *d_mmap;
d_strategy_t *d_strategy;
const char *d_name; /* base device name, e.g. 'vn' */
int d_maj;
d_dump_t *d_dump;
d_psize_t *d_psize;
u_int d_flags;
/* additions below are not binary compatible with 4.2 and below */
d_kqfilter_t *d_kqfilter;
};
/*
* Line discipline switch table
*/
struct linesw {
l_open_t *l_open;
l_close_t *l_close;
l_read_t *l_read;
l_write_t *l_write;
l_ioctl_t *l_ioctl;
l_rint_t *l_rint;
l_start_t *l_start;
l_modem_t *l_modem;
u_char l_hotchar;
};
extern struct linesw linesw[];
extern int nlinesw;
int ldisc_register(int , struct linesw *);
void ldisc_deregister(int);
#define LDISC_LOAD -1 /* Loadable line discipline */
#endif /* _KERNEL */
/*
* Swap device table
*/
struct swdevt {
udev_t sw_dev; /* For quasibogus swapdev reporting */
int sw_flags;
int sw_nblks;
int sw_used;
struct vnode *sw_vp;
dev_t sw_device;
};
#define SW_FREED 0x01
#define SW_SEQUENTIAL 0x02
#define sw_freed sw_flags /* XXX compat */
#ifdef _KERNEL
d_open_t noopen;
d_close_t noclose;
d_read_t noread;
d_write_t nowrite;
d_ioctl_t noioctl;
d_mmap_t nommap;
d_kqfilter_t nokqfilter;
#define nostrategy ((d_strategy_t *)NULL)
#define nopoll seltrue
d_dump_t nodump;
#define NUMCDEVSW 256
/*
* nopsize is little used, so not worth having dummy functions for.
*/
#define nopsize ((d_psize_t *)NULL)
d_open_t nullopen;
d_close_t nullclose;
l_ioctl_t l_nullioctl;
l_read_t l_noread;
l_write_t l_nowrite;
struct module;
struct devsw_module_data {
int (*chainevh)(struct module *, int, void *); /* next handler */
void *chainarg; /* arg for next event handler */
/* Do not initialize fields hereafter */
};
#define DEV_MODULE(name, evh, arg) \
static moduledata_t name##_mod = { \
#name, \
evh, \
arg \
}; \
DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
int cdevsw_add(struct cdevsw *new);
int cdevsw_remove(struct cdevsw *old);
int count_dev(dev_t dev);
void destroy_dev(dev_t dev);
void revoke_and_destroy_dev(dev_t dev);
struct cdevsw *devsw(dev_t dev);
const char *devtoname(dev_t dev);
int dev_named(dev_t pdev, const char *name);
void dev_depends(dev_t pdev, dev_t cdev);
void freedev(dev_t dev);
int iszerodev(dev_t dev);
dev_t makebdev(int maj, int min);
dev_t make_dev(struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...) __printflike(6, 7);
dev_t make_dev_alias(dev_t pdev, const char *fmt, ...) __printflike(2, 3);
int dev2unit(dev_t dev);
int unit2minor(int unit);
void setconf(void);
dev_t getdiskbyname(char *name);
/* This is type of the function DEVFS uses to hook into the kernel with */
typedef void devfs_create_t(dev_t dev);
typedef void devfs_destroy_t(dev_t dev);
extern devfs_create_t *devfs_create_hook;
extern devfs_destroy_t *devfs_destroy_hook;
extern int devfs_present;
#define UID_ROOT 0
#define UID_BIN 3
#define UID_UUCP 66
#define GID_WHEEL 0
#define GID_KMEM 2
#define GID_OPERATOR 5
#define GID_BIN 7
#define GID_GAMES 13
#define GID_DIALER 68
typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result);
int dev_stdclone(char *name, char **namep, const char *stem, int *unit);
EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
/* Stuff relating to kernel-dump */
typedef int dumper_t(
void *priv, /* Private to the driver. */
void *virtual, /* Virtual (mapped) address. */
vm_offset_t physical, /* Physical address of virtual. */
off_t offset, /* Byte-offset to write at. */
size_t length); /* Number of bytes to dump. */
struct dumperinfo {
dumper_t *dumper; /* Dumping function. */
void *priv; /* Private parts. */
u_int blocksize; /* Size of block in bytes. */
off_t mediaoffset; /* Initial offset in bytes. */
off_t mediasize; /* Space available in bytes. */
};
int set_dumper(struct dumperinfo *);
void dumpsys(struct dumperinfo *);
extern int dumping; /* system is dumping */
#endif /* _KERNEL */
#endif /* !_SYS_CONF_H_ */
