1139776Simp/*- 21541Srgrimes * Copyright (c) 1989, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 4. Neither the name of the University nor the names of its contributors 141541Srgrimes * may be used to endorse or promote products derived from this software 151541Srgrimes * without specific prior written permission. 161541Srgrimes * 171541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271541Srgrimes * SUCH DAMAGE. 281541Srgrimes * 291541Srgrimes * @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93 3050477Speter * $FreeBSD: releng/11.0/sys/fs/deadfs/dead_vnops.c 273132 2014-10-15 13:22:33Z kib $ 311541Srgrimes */ 321541Srgrimes 331541Srgrimes#include <sys/param.h> 341541Srgrimes#include <sys/systm.h> 352946Swollman#include <sys/kernel.h> 3631561Sbde#include <sys/lock.h> 3776166Smarkm#include <sys/mutex.h> 3876166Smarkm#include <sys/poll.h> 391541Srgrimes#include <sys/vnode.h> 401541Srgrimes 411541Srgrimes/* 421541Srgrimes * Prototypes for dead operations on vnodes. 431541Srgrimes */ 44138270Sphkstatic vop_lookup_t dead_lookup; 45138270Sphkstatic vop_open_t dead_open; 46155896Sjeffstatic vop_getwritemount_t dead_getwritemount; 47166167Skibstatic vop_rename_t dead_rename; 481541Srgrimes 49138290Sphkstruct vop_vector dead_vnodeops = { 50138290Sphk .vop_default = &default_vnodeops, 51140196Sphk 52138290Sphk .vop_access = VOP_EBADF, 53138290Sphk .vop_advlock = VOP_EBADF, 54240464Skib .vop_bmap = VOP_EBADF, 55138290Sphk .vop_create = VOP_PANIC, 56138290Sphk .vop_getattr = VOP_EBADF, 57155896Sjeff .vop_getwritemount = dead_getwritemount, 58138290Sphk .vop_inactive = VOP_NULL, 59240464Skib .vop_ioctl = VOP_EBADF, 60138290Sphk .vop_link = VOP_PANIC, 61138290Sphk .vop_lookup = dead_lookup, 62138290Sphk .vop_mkdir = VOP_PANIC, 63138290Sphk .vop_mknod = VOP_PANIC, 64138290Sphk .vop_open = dead_open, 65138290Sphk .vop_pathconf = VOP_EBADF, /* per pathconf(2) */ 66138290Sphk .vop_poll = dead_poll, 67138290Sphk .vop_read = dead_read, 68138290Sphk .vop_readdir = VOP_EBADF, 69138290Sphk .vop_readlink = VOP_EBADF, 70138290Sphk .vop_reclaim = VOP_NULL, 71138290Sphk .vop_remove = VOP_PANIC, 72166167Skib .vop_rename = dead_rename, 73138290Sphk .vop_rmdir = VOP_PANIC, 74138290Sphk .vop_setattr = VOP_EBADF, 75138290Sphk .vop_symlink = VOP_PANIC, 76185958Smarcus .vop_vptocnp = VOP_EBADF, 77138290Sphk .vop_write = dead_write, 781541Srgrimes}; 791541Srgrimes 80155896Sjeffstatic int 81273132Skibdead_getwritemount(struct vop_getwritemount_args *ap) 82155896Sjeff{ 83273132Skib 84155896Sjeff *(ap->a_mpp) = NULL; 85155896Sjeff return (0); 86155896Sjeff} 87155896Sjeff 881541Srgrimes/* 891541Srgrimes * Trivial lookup routine that always fails. 901541Srgrimes */ 9112570Sphkstatic int 92273132Skibdead_lookup(struct vop_lookup_args *ap) 931541Srgrimes{ 941541Srgrimes 951541Srgrimes *ap->a_vpp = NULL; 961541Srgrimes return (ENOTDIR); 971541Srgrimes} 981541Srgrimes 991541Srgrimes/* 1001541Srgrimes * Open always fails as if device did not exist. 1011541Srgrimes */ 10212570Sphkstatic int 103273132Skibdead_open(struct vop_open_args *ap) 1041541Srgrimes{ 1051541Srgrimes 1061541Srgrimes return (ENXIO); 1071541Srgrimes} 1081541Srgrimes 109273131Skibint 110273132Skibdead_read(struct vop_read_args *ap) 1111541Srgrimes{ 112273132Skib 1131541Srgrimes /* 11422521Sdyson * Return EOF for tty devices, EIO for others 11522521Sdyson */ 116101308Sjeff if ((ap->a_vp->v_vflag & VV_ISTTY) == 0) 11722521Sdyson return (EIO); 1181541Srgrimes return (0); 1191541Srgrimes} 1201541Srgrimes 121273131Skibint 122273132Skibdead_write(struct vop_write_args *ap) 1231541Srgrimes{ 124273132Skib 1251541Srgrimes return (EIO); 1261541Srgrimes} 1271541Srgrimes 128273131Skibint 129273132Skibdead_poll(struct vop_poll_args *ap) 13031727Swollman{ 131273130Skib 132273130Skib if (ap->a_events & ~POLLSTANDARD) 133273130Skib return (POLLNVAL); 134273130Skib 135273130Skib /* 136273130Skib * Let the user find out that the descriptor is gone. 137273130Skib */ 138273130Skib return (POLLHUP | ((POLLIN | POLLRDNORM) & ap->a_events)); 139273130Skib 14031727Swollman} 141166167Skib 142166167Skibstatic int 143273132Skibdead_rename(struct vop_rename_args *ap) 144166167Skib{ 145206093Skib 146206093Skib vop_rename_fail(ap); 147166167Skib return (EXDEV); 148166167Skib} 149