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/* $OpenBSD: kernfsmod.c,v 1.4 2004/04/05 07:19:26 deraadt Exp $ */
/*
* kernfsmod.c
*
* 05 Jun 93 Terry Lambert Original
*
* Copyright (c) 1993 Terrence R. Lambert.
* All rights reserved.
*
* 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 Terrence R. Lambert.
* 4. The name Terrence R. Lambert may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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.
*
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/exec.h>
#include <sys/lkm.h>
#include <sys/file.h>
#include <sys/errno.h>
/*
* This is the vfsops table from /sys/miscfs/kernfs/kernfs_vfsops.c
*/
extern struct vfsops kernfs_vfsops;
extern struct vnodeopv_desc kernfs_vnodeop_opv_desc;
struct vfsconf kernfs_vfsconf = {
&kernfs_vfsops, MOUNT_KERNFS, 11, 0, 0, NULL, NULL
};
/*
* XXX THE FOLLOWING COMMENT IS PROBABLY BOGUS... - cgd, 12/24/94
* Currently, the mount system call is broken in the way it operates
* and the vfssw[] table does not have a character string identifier
* for the file system type; therefore, to remount a file system after
* it has been mounted in the first place, the offset into the table
* must be the same; this will be corrected in future patches, but
* not right now. At the same time the fstab format will need to
* change to allow definition without mount of file systems.
*
* The flags field is a parameter to the init; this could be used to
* change the file system operation: for instance, in ISOFS, this
* could be used to enable/disable Rockridge extensions.
*/
MOD_VFS("kernfsmod", -1, &kernfs_vfsconf)
/*
* External entry point; should generally match name of .o file. The
* arguments are always the same for all loaded modules. The "load",
* "unload", and "stat" functions in "DISPATCH" will be called under
* their respective circumstances. If no function is desired, lkm_nofunc()
* should be supplied. They are called with the same arguments (cmd is
* included to allow the use of a single function, ver is included for
* version matching between modules and the kernel loader for the modules).
*
* Since we expect to link in the kernel and add external symbols to
* the kernel symbol name space in a future version, generally all
* functions used in the implementation of a particular module should
* be static unless they are expected to be seen in other modules or
* to resolve unresolved symbols already existing in the kernel (the
* second case is not likely to ever occur).
*
* The entry point should return 0 unless it is refusing load (in which
* case it should return an errno from errno.h).
*/
int
kernfsmod(lkmtp, cmd, ver)
struct lkm_table *lkmtp;
int cmd;
int ver;
{
/*
* This is normally done automatically at boot time if the
* opv_desc is listed in vfs_opv_descs[] in vfs_conf.c. For
* loaded modules, we have to do it manually.
*/
vfs_opv_init_explicit(&kernfs_vnodeop_opv_desc);
vfs_opv_init_default(&kernfs_vnodeop_opv_desc);
DISPATCH(lkmtp, cmd, ver, lkm_nofunc, lkm_nofunc, lkm_nofunc)
}
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