0ef1c82630
a few lines into <sys/vnode.h>. Add a few fields to struct specinfo, paving the way for the fun part.
73 lines
3.0 KiB
C
73 lines
3.0 KiB
C
/*
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* Copyright 1997,1998 Julian Elischer. All rights reserved.
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* julian@freebsd.org
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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 are
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* 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 notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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* $Id: devfsext.h,v 1.22 1998/12/10 19:57:01 eivind Exp $
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*/
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#ifndef _SYS_DEVFSEXT_H_
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#define _SYS_DEVFSEXT_H_
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/*
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* Make a device at a path, and get a cookie for it in return.
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* Specify the type, the minor number and the devsw entry to use,
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* and the initial default perms/ownerships.
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*/
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void *devfs_add_devswf __P((void *devsw, int minor, int chrblk, uid_t uid,
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gid_t gid, int perms, char *fmt, ...))
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__printflike(7, 8);
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/*
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* Make a link to a device you already made, and have the cookie for
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* We get another cookie, but for now, it can be discarded, as
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* at the moment there is nothing you can do with it that you couldn't do
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* with the original cookie. ( XXX this might be something I should change )
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*/
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void *devfs_makelink __P((void *original, char *fmt, ...)) __printflike(2, 3);
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/*
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* Remove all instances of a device you have made. INCLUDING LINKS.
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* I.e. either the cookie from the original device or the cookie
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* from a link will have the effect of removing both entries.
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* Removing with BOTH an original cookie and one from a link is
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* likely to cause a panic.
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*/
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void devfs_remove_dev __P((void *devnmp));
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/*
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* Check if a device exists and is the type you need. Returns NULL or a
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* cookie that can be used to try 'open' the device. XXX This is a bit
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* of a duplication of devfs_lookup(). I might one day try merge them a bit.
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* Used for mountroot under DEVFS. Path is relative to the base of the devfs.
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*/
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struct vnode *devfs_open_device __P((char *path, int devtype));
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void devfs_close_device __P((struct vnode *vn));
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dev_t devfs_vntodev __P((struct vnode *vn)); /* extract dev_t from devfs vn */
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#define DV_CHR 0
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#define DV_BLK 1
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#define DV_DEV 2
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#endif /* !_SYS_DEVFSEXT_H_ */
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