291 lines
8.4 KiB
C
291 lines
8.4 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)conf.h 8.5 (Berkeley) 1/9/95
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* $FreeBSD$
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*/
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#ifndef _SYS_CONF_H_
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#define _SYS_CONF_H_
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#include <sys/queue.h>
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#define SPECNAMELEN 15
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struct tty;
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struct disk;
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struct vnode;
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struct specinfo {
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u_int si_flags;
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#define SI_STASHED 0x0001 /* created in stashed storage */
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udev_t si_udev;
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LIST_ENTRY(specinfo) si_hash;
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SLIST_HEAD(, vnode) si_hlist;
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char si_name[SPECNAMELEN + 1];
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void *si_drv1, *si_drv2;
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struct cdevsw *si_devsw;
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void *si_devfs; /* save cookie for devfs operations */
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void *si_bdevfs; /* XXX block device (should go away) */
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int si_iosize_max; /* maximum I/O size (for physio &al) */
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union {
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struct {
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struct tty *__sit_tty;
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} __si_tty;
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struct {
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struct disk *__sid_disk;
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struct mount *__sid_mountpoint;
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int __sid_bsize_phys; /* min physical block size */
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int __sid_bsize_best; /* optimal block size */
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} __si_disk;
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} __si_u;
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};
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#define si_tty __si_u.__si_tty.__sit_tty
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#define si_disk __si_u.__si_disk.__sid_disk
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#define si_mountpoint __si_u.__si_disk.__sid_mountpoint
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#define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
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#define si_bsize_best __si_u.__si_disk.__sid_bsize_best
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/*
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* Exported shorthand
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*/
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#define v_hashchain v_rdev->si_hlist
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#define v_specmountpoint v_rdev->si_mountpoint
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/*
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* Special device management
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*/
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#define SPECHSZ 64
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#define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
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/*
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* Definitions of device driver entry switches
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*/
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struct buf;
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struct proc;
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struct uio;
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typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p));
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typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p));
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typedef void d_strategy_t __P((struct buf *bp));
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typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl));
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typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
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int fflag, struct proc *p));
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typedef int d_dump_t __P((dev_t dev));
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typedef int d_psize_t __P((dev_t dev));
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typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag));
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typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag));
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typedef int d_poll_t __P((dev_t dev, int events, struct proc *p));
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typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot));
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typedef int l_open_t __P((dev_t dev, struct tty *tp));
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typedef int l_close_t __P((struct tty *tp, int flag));
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typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag));
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typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag));
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typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data,
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int flag, struct proc *p));
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typedef int l_rint_t __P((int c, struct tty *tp));
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typedef int l_start_t __P((struct tty *tp));
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typedef int l_modem_t __P((struct tty *tp, int flag));
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/* This is type of the function DEVFS uses to hook into the kernel with */
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typedef void devfs_create_t __P((dev_t dev, uid_t uid, gid_t gid, int perms));
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typedef void devfs_remove_t __P((dev_t dev));
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/*
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* XXX: The dummy argument can be used to do what strategy1() never
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* did anywhere: Create a per device flag to lock the device during
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* label/slice surgery, all calls with a dummy == 0 gets stalled on
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* a queue somewhere, whereas dummy == 1 are let through. Once out
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* of surgery, reset the flag and restart all the stuff on the stall
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* queue.
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*/
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#define BUF_STRATEGY(bp, dummy) (*devsw((bp)->b_dev)->d_strategy)(bp)
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/*
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* Types for d_flags.
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*/
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#define D_TAPE 0x0001
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#define D_DISK 0x0002
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#define D_TTY 0x0004
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#define D_MEM 0x0008
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#define D_TYPEMASK 0xffff
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/*
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* Flags for d_flags.
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*/
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#define D_MEMDISK 0x10000 /* memory type disk */
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#define D_NAGGED 0x20000 /* nagged about missing make_dev() */
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#define D_CANFREE 0x40000 /* can free blocks */
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#define D_TRACKCLOSE 0x80000 /* track all closes */
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/*
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* Character device switch table
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*/
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struct cdevsw {
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d_open_t *d_open;
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d_close_t *d_close;
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d_read_t *d_read;
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d_write_t *d_write;
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d_ioctl_t *d_ioctl;
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d_poll_t *d_poll;
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d_mmap_t *d_mmap;
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d_strategy_t *d_strategy;
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const char *d_name; /* base device name, e.g. 'vn' */
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int d_maj;
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d_dump_t *d_dump;
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d_psize_t *d_psize;
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u_int d_flags;
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int d_bmaj;
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};
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/*
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* Line discipline switch table
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*/
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struct linesw {
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l_open_t *l_open;
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l_close_t *l_close;
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l_read_t *l_read;
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l_write_t *l_write;
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l_ioctl_t *l_ioctl;
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l_rint_t *l_rint;
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l_start_t *l_start;
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l_modem_t *l_modem;
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u_char l_hotchar;
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};
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#ifdef _KERNEL
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extern struct linesw linesw[];
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extern int nlinesw;
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int ldisc_register __P((int , struct linesw *));
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void ldisc_deregister __P((int));
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#define LDISC_LOAD -1 /* Loadable line discipline */
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#endif
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/*
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* Swap device table
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*/
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struct swdevt {
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udev_t sw_dev; /* For quasibogus swapdev reporting */
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int sw_flags;
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int sw_nblks;
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struct vnode *sw_vp;
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dev_t sw_device;
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};
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#define SW_FREED 0x01
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#define SW_SEQUENTIAL 0x02
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#define sw_freed sw_flags /* XXX compat */
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#ifdef _KERNEL
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d_open_t noopen;
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d_close_t noclose;
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d_read_t noread;
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d_write_t nowrite;
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d_ioctl_t noioctl;
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d_mmap_t nommap;
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#define nostrategy ((d_strategy_t *)NULL)
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#define nopoll seltrue
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d_dump_t nodump;
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#define NUMCDEVSW 256
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/*
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* nopsize is little used, so not worth having dummy functions for.
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*/
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#define nopsize ((d_psize_t *)NULL)
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d_open_t nullopen;
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d_close_t nullclose;
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l_read_t l_noread;
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l_write_t l_nowrite;
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struct module;
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struct devsw_module_data {
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int (*chainevh)(struct module *, int, void *); /* next handler */
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void *chainarg; /* arg for next event handler */
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/* Do not initialize fields hereafter */
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};
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#define DEV_MODULE(name, evh, arg) \
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static moduledata_t name##_mod = { \
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#name, \
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evh, \
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arg \
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}; \
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DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
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int cdevsw_add __P((struct cdevsw *new));
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int cdevsw_remove __P((struct cdevsw *old));
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void destroy_dev __P((dev_t dev));
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struct cdevsw *devsw __P((dev_t dev));
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const char *devtoname __P((dev_t dev));
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void freedev __P((dev_t dev));
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int iszerodev __P((dev_t dev));
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dev_t makebdev __P((int maj, int min));
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dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, char *fmt, ...)) __printflike(6, 7);
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int lminor __P((dev_t dev));
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void setconf __P((void));
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extern devfs_create_t *devfs_create_hook;
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/*
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* XXX: This included for when DEVFS resurfaces
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*/
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#define UID_ROOT 0
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#define UID_BIN 3
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#define UID_UUCP 66
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#define GID_WHEEL 0
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#define GID_KMEM 2
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#define GID_OPERATOR 5
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#define GID_BIN 7
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#define GID_GAMES 13
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#define GID_DIALER 68
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#endif /* _KERNEL */
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#endif /* !_SYS_CONF_H_ */
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