108 lines
4.4 KiB
C
108 lines
4.4 KiB
C
/*
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* kernfsmod.c
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*
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* 05 Jun 93 Terry Lambert Original
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*
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* Copyright (c) 1993 Terrence R. Lambert.
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* All rights reserved.
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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 Terrence R. Lambert.
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* 4. The name Terrence R. Lambert may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
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* 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 TERRENCE R. LAMBERT 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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* $NetBSD: kernfsmod.c,v 1.5 1997/10/13 11:21:12 lukem Exp $
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*/
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#define printf I_HATE_ANSI
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#include <stdio.h>
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#undef printf
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/lkm.h>
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#include <sys/file.h>
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#include <sys/errno.h>
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/*
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* This is the vfsops table from /sys/miscfs/kernfs/kernfs_vfsops.c
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*/
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extern struct vfsops kernfs_vfsops;
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extern struct vnodeopv_desc kernfs_vnodeop_opv_desc;
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/*
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* XXX THE FOLLOWING COMMENT IS PROBABLY BOGUS... - cgd, 12/24/94
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* Currently, the mount system call is broken in the way it operates
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* and the vfssw[] table does not have a character string identifier
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* for the file system type; therefore, to remount a file system after
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* it has been mounted in the first place, the offset into the table
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* must be the same; this will be corrected in future patches, but
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* not right now. At the same time the fstab format will need to
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* change to allow definition without mount of file systems.
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*
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* The flags field is a parameter to the init; this could be used to
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* change the file system operation: for instance, in ISOFS, this
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* could be used to enable/disable Rockridge extensions.
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*/
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MOD_VFS("kernfs", -1, &kernfs_vfsops)
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/*
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* External entry point; should generally match name of .o file. The
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* arguments are always the same for all loaded modules. The "load",
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* "unload", and "stat" functions in "DISPATCH" will be called under
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* their respective circumstances. If no function is desired, lkm_nofunc()
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* should be supplied. They are called with the same arguments (cmd is
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* included to allow the use of a single function, ver is included for
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* version matching between modules and the kernel loader for the modules).
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*
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* Since we expect to link in the kernel and add external symbols to
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* the kernel symbol name space in a future version, generally all
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* functions used in the implementation of a particular module should
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* be static unless they are expected to be seen in other modules or
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* to resolve unresolved symbols already existing in the kernel (the
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* second case is not likely to ever occur).
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*
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* The entry point should return 0 unless it is refusing load (in which
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* case it should return an errno from errno.h).
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*/
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kernfsmod(lkmtp, cmd, ver)
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struct lkm_table *lkmtp;
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int cmd;
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int ver;
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{
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/*
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* This is normally done automatically at boot time if the
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* opv_desc is listed in vfs_opv_descs[] in vfs_conf.c. For
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* loaded modules, we have to do it manually.
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*/
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vfs_opv_init_explicit(&kernfs_vnodeop_opv_desc);
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vfs_opv_init_default(&kernfs_vnodeop_opv_desc);
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DISPATCH(lkmtp, cmd, ver, lkm_nofunc, lkm_nofunc, lkm_nofunc)
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}
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