[apple/xnu.git] / bsd / miscfs / deadfs / dead_vnops.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  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 the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 *	@(#)dead_vnops.c	8.3 (Berkeley) 5/14/95
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/vnode_internal.h>
#include <sys/errno.h>
#include <sys/namei.h>
#include <sys/buf.h>
#include <vfs/vfs_support.h>

/*
 * Prototypes for dead operations on vnodes.
 */
int	dead_badop(void *);
int	dead_ebadf(void *);
int	dead_lookup(struct vnop_lookup_args *);
#define dead_create (int (*)(struct  vnop_create_args *))dead_badop
#define dead_mknod (int (*)(struct  vnop_mknod_args *))dead_badop
int	dead_open(struct vnop_open_args *);
#define dead_close (int (*)(struct  vnop_close_args *))nullop
#define dead_access (int (*)(struct  vnop_access_args *))dead_ebadf
#define dead_getattr (int (*)(struct  vnop_getattr_args *))dead_ebadf
#define dead_setattr (int (*)(struct  vnop_setattr_args *))dead_ebadf
int	dead_read(struct vnop_read_args *);
int	dead_write(struct vnop_write_args *);
int	dead_ioctl(struct vnop_ioctl_args *);
int	dead_select(struct vnop_select_args *);
#define dead_mmap (int (*)(struct  vnop_mmap_args *))dead_badop
#define dead_fsync (int (*)(struct  vnop_fsync_args *))nullop
#define dead_remove (int (*)(struct  vnop_remove_args ))dead_badop
#define dead_link (int (*)(struct  vnop_link_args *))dead_badop
#define dead_rename (int (*)(struct  vnop_rename_args *))dead_badop
#define dead_mkdir (int (*)(struct  vnop_mkdir_args *))dead_badop
#define dead_rmdir (int (*)(struct  vnop_rmdir_args *))dead_badop
#define dead_symlink (int (*)(struct  vnop_symlink_args *))dead_badop
#define dead_readdir (int (*)(struct  vnop_readdir_args *))dead_ebadf
#define dead_readlink (int (*)(struct  vnop_readlink_args *))dead_ebadf
#define dead_inactive (int (*)(struct  vnop_inactive_args *))nullop
#define dead_reclaim (int (*)(struct  vnop_reclaim_args *))nullop
int	dead_strategy(struct vnop_strategy_args *);
#define dead_pathconf (int (*)(struct  vnop_pathconf_args *))dead_ebadf
#define dead_advlock (int (*)(struct  vnop_advlock_args *))dead_ebadf
#define dead_bwrite (int (*)(struct  vnop_bwrite_args *))nullop
int	dead_pagein(struct vnop_pagein_args *);
int	dead_pageout(struct vnop_pageout_args *);
int dead_blktooff(struct vnop_blktooff_args *);
int dead_offtoblk(struct vnop_offtoblk_args *);
int dead_blockmap(struct vnop_blockmap_args *);

#define VOPFUNC int (*)(void *)
int (**dead_vnodeop_p)(void *);
struct vnodeopv_entry_desc dead_vnodeop_entries[] = {
	{ &vnop_default_desc, (VOPFUNC)vn_default_error },
	{ &vnop_lookup_desc, (VOPFUNC)dead_lookup },	/* lookup */
	{ &vnop_create_desc, (VOPFUNC)dead_create },	/* create */
	{ &vnop_open_desc, (VOPFUNC)dead_open },		/* open */
	{ &vnop_mknod_desc, (VOPFUNC)dead_mknod },		/* mknod */
	{ &vnop_close_desc, (VOPFUNC)dead_close },	/* close */
	{ &vnop_access_desc, (VOPFUNC)dead_access },	/* access */
	{ &vnop_getattr_desc, (VOPFUNC)dead_getattr },	/* getattr */
	{ &vnop_setattr_desc, (VOPFUNC)dead_setattr },	/* setattr */
	{ &vnop_read_desc, (VOPFUNC)dead_read },		/* read */
	{ &vnop_write_desc, (VOPFUNC)dead_write },	/* write */
	{ &vnop_ioctl_desc, (VOPFUNC)dead_ioctl },	/* ioctl */
	{ &vnop_select_desc, (VOPFUNC)dead_select },	/* select */
	{ &vnop_mmap_desc, (VOPFUNC)dead_mmap },		/* mmap */
	{ &vnop_fsync_desc, (VOPFUNC)dead_fsync },	/* fsync */
	{ &vnop_remove_desc, (VOPFUNC)dead_remove },	/* remove */
	{ &vnop_link_desc, (VOPFUNC)dead_link },		/* link */
	{ &vnop_rename_desc, (VOPFUNC)dead_rename },	/* rename */
	{ &vnop_mkdir_desc, (VOPFUNC)dead_mkdir },	/* mkdir */
	{ &vnop_rmdir_desc, (VOPFUNC)dead_rmdir },	/* rmdir */
	{ &vnop_symlink_desc, (VOPFUNC)dead_symlink },	/* symlink */
	{ &vnop_readdir_desc, (VOPFUNC)dead_readdir },	/* readdir */
	{ &vnop_readlink_desc, (VOPFUNC)dead_readlink },	/* readlink */
	{ &vnop_inactive_desc, (VOPFUNC)dead_inactive },	/* inactive */
	{ &vnop_reclaim_desc, (VOPFUNC)dead_reclaim },	/* reclaim */
	{ &vnop_strategy_desc, (VOPFUNC)dead_strategy },	/* strategy */
	{ &vnop_pathconf_desc, (VOPFUNC)dead_pathconf },	/* pathconf */
	{ &vnop_advlock_desc, (VOPFUNC)dead_advlock },	/* advlock */
	{ &vnop_bwrite_desc, (VOPFUNC)dead_bwrite },	/* bwrite */
	{ &vnop_pagein_desc, (VOPFUNC)err_pagein },	/* Pagein */
	{ &vnop_pageout_desc, (VOPFUNC)err_pageout },	/* Pageout */
        { &vnop_copyfile_desc, (VOPFUNC)err_copyfile },	/* Copyfile */
	{ &vnop_blktooff_desc, (VOPFUNC)dead_blktooff },	/* blktooff */
	{ &vnop_offtoblk_desc, (VOPFUNC)dead_offtoblk },	/* offtoblk */
  	{ &vnop_blockmap_desc, (VOPFUNC)dead_blockmap },		/* blockmap */
	{ (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc dead_vnodeop_opv_desc =
	{ &dead_vnodeop_p, dead_vnodeop_entries };

/*
 * Trivial lookup routine that always fails.
 */
/* ARGSUSED */
int
dead_lookup(ap)
	struct vnop_lookup_args /* {
		struct vnode * a_dvp;
		struct vnode ** a_vpp;
		struct componentname * a_cnp;
		vfs_context_t a_context;
	} */ *ap;
{

	*ap->a_vpp = NULL;
	return (ENOTDIR);
}

/*
 * Open always fails as if device did not exist.
 */
/* ARGSUSED */
int
dead_open(ap)
	struct vnop_open_args /* {
		struct vnode *a_vp;
		int  a_mode;
		vfs_context_t a_context;
	} */ *ap;
{

	return (ENXIO);
}

/*
 * Vnode op for read
 */
/* ARGSUSED */
int
dead_read(ap)
	struct vnop_read_args /* {
		struct vnode *a_vp;
		struct uio *a_uio;
		int  a_ioflag;
		vfs_context_t a_context;
	} */ *ap;
{

	if (chkvnlock(ap->a_vp))
		panic("dead_read: lock");
	/*
	 * Return EOF for character devices, EIO for others
	 */
	if (ap->a_vp->v_type != VCHR)
		return (EIO);
	return (0);
}

/*
 * Vnode op for write
 */
/* ARGSUSED */
int
dead_write(ap)
	struct vnop_write_args /* {
		struct vnode *a_vp;
		struct uio *a_uio;
		int  a_ioflag;
		vfs_context_t a_context;
	} */ *ap;
{

	if (chkvnlock(ap->a_vp))
		panic("dead_write: lock");
	return (EIO);
}

/*
 * Device ioctl operation.
 */
/* ARGSUSED */
int
dead_ioctl(ap)
	struct vnop_ioctl_args /* {
		struct vnode *a_vp;
		u_long a_command;
		caddr_t  a_data;
		int  a_fflag;
		vfs_context_t a_context;
	} */ *ap;
{

	if (!chkvnlock(ap->a_vp))
		return (EBADF);
	return (VCALL(ap->a_vp, VOFFSET(vnop_ioctl), ap));
}

/* ARGSUSED */
int
dead_select(ap)
	struct vnop_select_args /* {
		struct vnode *a_vp;
		int  a_which;
		int  a_fflags;
		kauth_cred_t a_cred;
		void *a_wql;
		struct proc *a_p;
	} */ *ap;
{

	/*
	 * Let the user find out that the descriptor is gone.
	 */
	return (1);
}

/*
 * Just call the device strategy routine
 */
int
dead_strategy(ap)
	struct vnop_strategy_args /* {
		struct buf *a_bp;
	} */ *ap;
{

	if (buf_vnode(ap->a_bp) == NULL || !chkvnlock(buf_vnode(ap->a_bp))) {
	        buf_seterror(ap->a_bp, EIO);
		buf_biodone(ap->a_bp);
		return (EIO);
	}
	return (VNOP_STRATEGY(ap->a_bp));
}

/*
 * Wait until the vnode has finished changing state.
 */
int
dead_blockmap(ap)
	struct vnop_blockmap_args /* {
		struct vnode *a_vp;
		off_t a_foffset;
		size_t a_size;
		daddr64_t *a_bpn;
		size_t *a_run;
		void *a_poff;
		int flags;
		vfs_context_t a_context;
	} */ *ap;
{

	if (!chkvnlock(ap->a_vp))
		return (EIO);
	return (VNOP_BLOCKMAP(ap->a_vp, ap->a_foffset, ap->a_size, ap->a_bpn,
	                 ap->a_run, ap->a_poff, ap->a_flags, ap->a_context));
}

/*
 * Empty vnode failed operation
 */
/* ARGSUSED */
int
dead_ebadf(void *dummy)
{

	return (EBADF);
}

/*
 * Empty vnode bad operation
 */
/* ARGSUSED */
int
dead_badop(void *dummy)
{

	panic("dead_badop called");
	/* NOTREACHED */
}

/*
 * Empty vnode null operation
 */
/* ARGSUSED */
int
dead_nullop(void *dummy)
{

	return (0);
}

/*
 * We have to wait during times when the vnode is
 * in a state of change.
 */
int
chkvnlock(__unused vnode_t vp)
{
	return (0);
}


/* Blktooff */
int
dead_blktooff(ap)
	struct vnop_blktooff_args /* {
		struct vnode *a_vp;
		daddr64_t a_lblkno;
		off_t *a_offset;    
	} */ *ap;
{
    if (!chkvnlock(ap->a_vp))
		return (EIO);

	*ap->a_offset = (off_t)-1;	/* failure */
	return (0);
}
/* Blktooff */
int
dead_offtoblk(ap)
struct vnop_offtoblk_args /* {
	struct vnode *a_vp;
	off_t a_offset;    
	daddr64_t *a_lblkno;
	} */ *ap;
{
    if (!chkvnlock(ap->a_vp))
		return (EIO);

	*ap->a_lblkno = (daddr64_t)-1;	/* failure */
	return (0);
}
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	29	/*
	30	* Copyright (c) 1989, 1993
	31	* The Regents of the University of California. All rights reserved.
	32	*
	33	* Redistribution and use in source and binary forms, with or without
	34	* modification, are permitted provided that the following conditions
	35	* are met:
	36	* 1. Redistributions of source code must retain the above copyright
	37	* notice, this list of conditions and the following disclaimer.
	38	* 2. Redistributions in binary form must reproduce the above copyright
	39	* notice, this list of conditions and the following disclaimer in the
	40	* documentation and/or other materials provided with the distribution.
	41	* 3. All advertising materials mentioning features or use of this software
	42	* must display the following acknowledgement:
	43	* This product includes software developed by the University of
	44	* California, Berkeley and its contributors.
	45	* 4. Neither the name of the University nor the names of its contributors
	46	* may be used to endorse or promote products derived from this software
	47	* without specific prior written permission.
	48	*
	49	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	50	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	51	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	52	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	53	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	54	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	55	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	56	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	57	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	58	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	59	* SUCH DAMAGE.
	60	*
	61	* @(#)dead_vnops.c 8.3 (Berkeley) 5/14/95
	62	*/
	63
	64	#include <sys/param.h>
	65	#include <sys/systm.h>
	66	#include <sys/time.h>
91447636	67	#include <sys/vnode_internal.h>
1c79356b A	68	#include <sys/errno.h>
	69	#include <sys/namei.h>
	70	#include <sys/buf.h>
	71	#include <vfs/vfs_support.h>
	72
	73	/*
	74	* Prototypes for dead operations on vnodes.
	75	*/
91447636 A	76	int dead_badop(void *);
	77	int dead_ebadf(void *);
	78	int dead_lookup(struct vnop_lookup_args *);
	79	#define dead_create (int ()(struct vnop_create_args ))dead_badop
	80	#define dead_mknod (int ()(struct vnop_mknod_args ))dead_badop
	81	int dead_open(struct vnop_open_args *);
	82	#define dead_close (int ()(struct vnop_close_args ))nullop
	83	#define dead_access (int ()(struct vnop_access_args ))dead_ebadf
	84	#define dead_getattr (int ()(struct vnop_getattr_args ))dead_ebadf
	85	#define dead_setattr (int ()(struct vnop_setattr_args ))dead_ebadf
	86	int dead_read(struct vnop_read_args *);
	87	int dead_write(struct vnop_write_args *);
	88	int dead_ioctl(struct vnop_ioctl_args *);
	89	int dead_select(struct vnop_select_args *);
	90	#define dead_mmap (int ()(struct vnop_mmap_args ))dead_badop
	91	#define dead_fsync (int ()(struct vnop_fsync_args ))nullop
	92	#define dead_remove (int (*)(struct vnop_remove_args ))dead_badop
	93	#define dead_link (int ()(struct vnop_link_args ))dead_badop
	94	#define dead_rename (int ()(struct vnop_rename_args ))dead_badop
	95	#define dead_mkdir (int ()(struct vnop_mkdir_args ))dead_badop
	96	#define dead_rmdir (int ()(struct vnop_rmdir_args ))dead_badop
	97	#define dead_symlink (int ()(struct vnop_symlink_args ))dead_badop
	98	#define dead_readdir (int ()(struct vnop_readdir_args ))dead_ebadf
	99	#define dead_readlink (int ()(struct vnop_readlink_args ))dead_ebadf
	100	#define dead_inactive (int ()(struct vnop_inactive_args ))nullop
	101	#define dead_reclaim (int ()(struct vnop_reclaim_args ))nullop
	102	int dead_strategy(struct vnop_strategy_args *);
	103	#define dead_pathconf (int ()(struct vnop_pathconf_args ))dead_ebadf
	104	#define dead_advlock (int ()(struct vnop_advlock_args ))dead_ebadf
	105	#define dead_bwrite (int ()(struct vnop_bwrite_args ))nullop
	106	int dead_pagein(struct vnop_pagein_args *);
	107	int dead_pageout(struct vnop_pageout_args *);
	108	int dead_blktooff(struct vnop_blktooff_args *);
	109	int dead_offtoblk(struct vnop_offtoblk_args *);
	110	int dead_blockmap(struct vnop_blockmap_args *);
1c79356b A	111
	112	#define VOPFUNC int ()(void )
	113	int (*dead_vnodeop_p)(void );
	114	struct vnodeopv_entry_desc dead_vnodeop_entries[] = {
91447636 A	115	{ &vnop_default_desc, (VOPFUNC)vn_default_error },
	116	{ &vnop_lookup_desc, (VOPFUNC)dead_lookup }, /* lookup */
	117	{ &vnop_create_desc, (VOPFUNC)dead_create }, /* create */
	118	{ &vnop_open_desc, (VOPFUNC)dead_open }, /* open */
	119	{ &vnop_mknod_desc, (VOPFUNC)dead_mknod }, /* mknod */
	120	{ &vnop_close_desc, (VOPFUNC)dead_close }, /* close */
	121	{ &vnop_access_desc, (VOPFUNC)dead_access }, /* access */
	122	{ &vnop_getattr_desc, (VOPFUNC)dead_getattr }, /* getattr */
	123	{ &vnop_setattr_desc, (VOPFUNC)dead_setattr }, /* setattr */
	124	{ &vnop_read_desc, (VOPFUNC)dead_read }, /* read */
	125	{ &vnop_write_desc, (VOPFUNC)dead_write }, /* write */
	126	{ &vnop_ioctl_desc, (VOPFUNC)dead_ioctl }, /* ioctl */
	127	{ &vnop_select_desc, (VOPFUNC)dead_select }, /* select */
	128	{ &vnop_mmap_desc, (VOPFUNC)dead_mmap }, /* mmap */
	129	{ &vnop_fsync_desc, (VOPFUNC)dead_fsync }, /* fsync */
	130	{ &vnop_remove_desc, (VOPFUNC)dead_remove }, /* remove */
	131	{ &vnop_link_desc, (VOPFUNC)dead_link }, /* link */
	132	{ &vnop_rename_desc, (VOPFUNC)dead_rename }, /* rename */
	133	{ &vnop_mkdir_desc, (VOPFUNC)dead_mkdir }, /* mkdir */
	134	{ &vnop_rmdir_desc, (VOPFUNC)dead_rmdir }, /* rmdir */
	135	{ &vnop_symlink_desc, (VOPFUNC)dead_symlink }, /* symlink */
	136	{ &vnop_readdir_desc, (VOPFUNC)dead_readdir }, /* readdir */
	137	{ &vnop_readlink_desc, (VOPFUNC)dead_readlink }, /* readlink */
	138	{ &vnop_inactive_desc, (VOPFUNC)dead_inactive }, /* inactive */
	139	{ &vnop_reclaim_desc, (VOPFUNC)dead_reclaim }, /* reclaim */
	140	{ &vnop_strategy_desc, (VOPFUNC)dead_strategy }, /* strategy */
	141	{ &vnop_pathconf_desc, (VOPFUNC)dead_pathconf }, /* pathconf */
	142	{ &vnop_advlock_desc, (VOPFUNC)dead_advlock }, /* advlock */
	143	{ &vnop_bwrite_desc, (VOPFUNC)dead_bwrite }, /* bwrite */
	144	{ &vnop_pagein_desc, (VOPFUNC)err_pagein }, /* Pagein */
	145	{ &vnop_pageout_desc, (VOPFUNC)err_pageout }, /* Pageout */
	146	{ &vnop_copyfile_desc, (VOPFUNC)err_copyfile }, /* Copyfile */
	147	{ &vnop_blktooff_desc, (VOPFUNC)dead_blktooff }, /* blktooff */
	148	{ &vnop_offtoblk_desc, (VOPFUNC)dead_offtoblk }, /* offtoblk */
	149	{ &vnop_blockmap_desc, (VOPFUNC)dead_blockmap }, /* blockmap */
1c79356b A	150	{ (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
	151	};
	152	struct vnodeopv_desc dead_vnodeop_opv_desc =
	153	{ &dead_vnodeop_p, dead_vnodeop_entries };
	154
	155	/*
	156	* Trivial lookup routine that always fails.
	157	*/
	158	/* ARGSUSED */
	159	int
	160	dead_lookup(ap)
91447636	161	struct vnop_lookup_args /* {
1c79356b A	162	struct vnode * a_dvp;
	163	struct vnode ** a_vpp;
	164	struct componentname * a_cnp;
91447636	165	vfs_context_t a_context;
1c79356b A	166	} / ap;
	167	{
	168
	169	*ap->a_vpp = NULL;
	170	return (ENOTDIR);
	171	}
	172
	173	/*
	174	* Open always fails as if device did not exist.
	175	*/
	176	/* ARGSUSED */
	177	int
	178	dead_open(ap)
91447636	179	struct vnop_open_args /* {
1c79356b A	180	struct vnode *a_vp;
1c79356b A	181	int a_mode;
91447636	182	vfs_context_t a_context;
1c79356b A	183	} / ap;
	184	{
	185
	186	return (ENXIO);
	187	}
	188
	189	/*
	190	* Vnode op for read
	191	*/
	192	/* ARGSUSED */
	193	int
	194	dead_read(ap)
91447636	195	struct vnop_read_args /* {
1c79356b A	196	struct vnode *a_vp;
	197	struct uio *a_uio;
	198	int a_ioflag;
91447636	199	vfs_context_t a_context;
1c79356b A	200	} / ap;
	201	{
	202
	203	if (chkvnlock(ap->a_vp))
	204	panic("dead_read: lock");
	205	/*
	206	* Return EOF for character devices, EIO for others
	207	*/
	208	if (ap->a_vp->v_type != VCHR)
	209	return (EIO);
	210	return (0);
	211	}
	212
	213	/*
	214	* Vnode op for write
	215	*/
	216	/* ARGSUSED */
	217	int
	218	dead_write(ap)
91447636	219	struct vnop_write_args /* {
1c79356b A	220	struct vnode *a_vp;
	221	struct uio *a_uio;
	222	int a_ioflag;
91447636	223	vfs_context_t a_context;
1c79356b A	224	} / ap;
	225	{
	226
	227	if (chkvnlock(ap->a_vp))
	228	panic("dead_write: lock");
	229	return (EIO);
	230	}
	231
	232	/*
	233	* Device ioctl operation.
	234	*/
	235	/* ARGSUSED */
	236	int
	237	dead_ioctl(ap)
91447636	238	struct vnop_ioctl_args /* {
1c79356b A	239	struct vnode *a_vp;
	240	u_long a_command;
	241	caddr_t a_data;
	242	int a_fflag;
91447636	243	vfs_context_t a_context;
1c79356b A	244	} / ap;
	245	{
	246
	247	if (!chkvnlock(ap->a_vp))
	248	return (EBADF);
91447636	249	return (VCALL(ap->a_vp, VOFFSET(vnop_ioctl), ap));
1c79356b A	250	}
	251
	252	/* ARGSUSED */
	253	int
	254	dead_select(ap)
91447636	255	struct vnop_select_args /* {
1c79356b A	256	struct vnode *a_vp;
	257	int a_which;
	258	int a_fflags;
91447636	259	kauth_cred_t a_cred;
0b4e3aa0	260	void *a_wql;
1c79356b A	261	struct proc *a_p;
	262	} / ap;
	263	{
	264
	265	/*
	266	* Let the user find out that the descriptor is gone.
	267	*/
	268	return (1);
	269	}
	270
	271	/*
	272	* Just call the device strategy routine
	273	*/
	274	int
	275	dead_strategy(ap)
91447636	276	struct vnop_strategy_args /* {
1c79356b A	277	struct buf *a_bp;
	278	} / ap;
	279	{
	280
91447636 A	281	if (buf_vnode(ap->a_bp) == NULL \|\| !chkvnlock(buf_vnode(ap->a_bp))) {
	282	buf_seterror(ap->a_bp, EIO);
	283	buf_biodone(ap->a_bp);
1c79356b A	284	return (EIO);
1c79356b A	285	}
91447636	286	return (VNOP_STRATEGY(ap->a_bp));
1c79356b A	287	}
	288
	289	/*
	290	* Wait until the vnode has finished changing state.
	291	*/
	292	int
91447636 A	293	dead_blockmap(ap)
91447636 A	294	struct vnop_blockmap_args /* {
1c79356b A	295	struct vnode *a_vp;
	296	off_t a_foffset;
	297	size_t a_size;
91447636	298	daddr64_t *a_bpn;
1c79356b A	299	size_t *a_run;
1c79356b A	300	void *a_poff;
91447636 A	301	int flags;
91447636 A	302	vfs_context_t a_context;
1c79356b A	303	} / ap;
	304	{
	305
	306	if (!chkvnlock(ap->a_vp))
	307	return (EIO);
91447636 A	308	return (VNOP_BLOCKMAP(ap->a_vp, ap->a_foffset, ap->a_size, ap->a_bpn,
91447636 A	309	ap->a_run, ap->a_poff, ap->a_flags, ap->a_context));
1c79356b A	310	}
	311
	312	/*
	313	* Empty vnode failed operation
	314	*/
91447636	315	/* ARGSUSED */
1c79356b	316	int
91447636	317	dead_ebadf(void *dummy)
1c79356b A	318	{
	319
	320	return (EBADF);
	321	}
	322
	323	/*
	324	* Empty vnode bad operation
	325	*/
91447636	326	/* ARGSUSED */
1c79356b	327	int
91447636	328	dead_badop(void *dummy)
1c79356b A	329	{
	330
	331	panic("dead_badop called");
	332	/* NOTREACHED */
	333	}
	334
	335	/*
	336	* Empty vnode null operation
	337	*/
91447636	338	/* ARGSUSED */
1c79356b	339	int
91447636	340	dead_nullop(void *dummy)
1c79356b A	341	{
	342
	343	return (0);
	344	}
	345
	346	/*
	347	* We have to wait during times when the vnode is
	348	* in a state of change.
	349	*/
	350	int
91447636	351	chkvnlock(__unused vnode_t vp)
1c79356b	352	{
91447636	353	return (0);
1c79356b A	354	}
	355
	356
	357	/* Blktooff */
	358	int
	359	dead_blktooff(ap)
91447636	360	struct vnop_blktooff_args /* {
1c79356b	361	struct vnode *a_vp;
91447636	362	daddr64_t a_lblkno;
1c79356b A	363	off_t *a_offset;
	364	} / ap;
	365	{
	366	if (!chkvnlock(ap->a_vp))
	367	return (EIO);
	368
	369	ap->a_offset = (off_t)-1; / failure */
	370	return (0);
	371	}
	372	/* Blktooff */
	373	int
	374	dead_offtoblk(ap)
91447636	375	struct vnop_offtoblk_args /* {
1c79356b A	376	struct vnode *a_vp;
1c79356b A	377	off_t a_offset;
91447636	378	daddr64_t *a_lblkno;
1c79356b A	379	} / ap;
	380	{
	381	if (!chkvnlock(ap->a_vp))
	382	return (EIO);
	383
91447636	384	ap->a_lblkno = (daddr64_t)-1; / failure */
1c79356b A	385	return (0);
1c79356b A	386	}