20998b4001
- allow vnddetach() to return EBUSY if any vnd's are currently initialised. lkm: - add new 'dev' directory, initially with just a 'vnd' LKM. for now, the vnd lkm driver requests 4 devices.... XXX: vnd should be converted to a psuedo-device that creates & deletes instances of itself (vnd0, vnd1, etc) when vnconfig -c/-u are called, then the vnd lkm driver can not be limited to '4' by default.
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* $NetBSD: lkminit_vnd.c,v 1.1 2002/11/16 08:10:51 mrg Exp $ */
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/*
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* Copyright (c) 2002 Matthew R. Green
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: lkminit_vnd.c,v 1.1 2002/11/16 08:10:51 mrg Exp $");
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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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extern const struct bdevsw vnd_bdevsw;
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extern const struct cdevsw vnd_cdevsw;
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extern void vndattach (int);
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extern int vnddetach (void);
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static int vnd_lkm(struct lkm_table *lkmtp, int cmd);
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int vnd_lkmentry(struct lkm_table *lkmtp, int cmd, int ver);
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MOD_DEV("vnd", "vnd", &vnd_bdevsw, -1, &vnd_cdevsw, -1);
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/*
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* Randomly choose 4; should have vnconfig (un)create each vnd ala "gif"..
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*/
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#define NVNDLKM 4
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static int
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vnd_lkm(struct lkm_table *lkmtp, int cmd)
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{
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int error = 0;
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if (cmd == LKM_E_LOAD)
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vndattach(NVNDLKM);
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else if (cmd == LKM_E_UNLOAD)
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error = vnddetach();
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return (error);
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}
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int
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vnd_lkmentry (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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DISPATCH(lkmtp, cmd, ver, vnd_lkm, vnd_lkm, lkm_nofunc);
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}
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