fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY 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 REGENTS OR CONTRIBUTORS 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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* @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/poll.h>
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#include <sys/vnode.h>
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/*
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* Prototypes for dead operations on vnodes.
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*/
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static vop_lookup_t dead_lookup;
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static vop_open_t dead_open;
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static vop_getwritemount_t dead_getwritemount;
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static vop_rename_t dead_rename;
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struct vop_vector dead_vnodeops = {
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.vop_default = &default_vnodeops,
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.vop_access = VOP_EBADF,
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.vop_advlock = VOP_EBADF,
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.vop_bmap = VOP_EBADF,
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.vop_create = VOP_PANIC,
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.vop_getattr = VOP_EBADF,
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.vop_getwritemount = dead_getwritemount,
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.vop_inactive = VOP_NULL,
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.vop_ioctl = VOP_EBADF,
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.vop_link = VOP_PANIC,
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.vop_lookup = dead_lookup,
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.vop_mkdir = VOP_PANIC,
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.vop_mknod = VOP_PANIC,
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.vop_open = dead_open,
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.vop_pathconf = VOP_EBADF, /* per pathconf(2) */
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.vop_poll = dead_poll,
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.vop_read = dead_read,
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.vop_readdir = VOP_EBADF,
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.vop_readlink = VOP_EBADF,
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.vop_reclaim = VOP_NULL,
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.vop_remove = VOP_PANIC,
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.vop_rename = dead_rename,
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.vop_rmdir = VOP_PANIC,
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.vop_setattr = VOP_EBADF,
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.vop_symlink = VOP_PANIC,
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.vop_vptocnp = VOP_EBADF,
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.vop_write = dead_write,
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};
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static int
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dead_getwritemount(struct vop_getwritemount_args *ap)
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{
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*(ap->a_mpp) = NULL;
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return (0);
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}
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/*
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* Trivial lookup routine that always fails.
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*/
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static int
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dead_lookup(struct vop_lookup_args *ap)
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{
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*ap->a_vpp = NULL;
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return (ENOTDIR);
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}
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/*
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* Open always fails as if device did not exist.
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*/
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static int
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dead_open(struct vop_open_args *ap)
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{
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return (ENXIO);
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}
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int
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dead_read(struct vop_read_args *ap)
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{
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/*
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* Return EOF for tty devices, EIO for others
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*/
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if ((ap->a_vp->v_vflag & VV_ISTTY) == 0)
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return (EIO);
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return (0);
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}
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int
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dead_write(struct vop_write_args *ap)
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{
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return (EIO);
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}
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int
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dead_poll(struct vop_poll_args *ap)
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{
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if (ap->a_events & ~POLLSTANDARD)
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return (POLLNVAL);
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/*
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* Let the user find out that the descriptor is gone.
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*/
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return (POLLHUP | ((POLLIN | POLLRDNORM) & ap->a_events));
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}
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static int
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dead_rename(struct vop_rename_args *ap)
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{
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vop_rename_fail(ap);
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return (EXDEV);
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}
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