1 /* $NetBSD: null_vnops.c,v 1.37 2011/01/10 11:11:03 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 1999 National Aeronautics & Space Administration 5 * All rights reserved. 6 * 7 * This software was written by William Studenmund of the 8 * Numerical Aerospace Simulation Facility, NASA Ames Research Center. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the National Aeronautics & Space Administration 19 * nor the names of its contributors may be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB- 27 * UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 28 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Copyright (c) 1992, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * John Heidemann of the UCLA Ficus project. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)null_vnops.c 8.6 (Berkeley) 5/27/95 68 * 69 * Ancestors: 70 * @(#)lofs_vnops.c 1.2 (Berkeley) 6/18/92 71 * Id: lofs_vnops.c,v 1.11 1992/05/30 10:05:43 jsp Exp jsp 72 * ...and... 73 * @(#)null_vnodeops.c 1.20 92/07/07 UCLA Ficus project 74 */ 75 76 /* 77 * Null file-system. 78 * 79 * Implemented using layerfs, see layer_vnops.c for a description. 80 */ 81 82 #include <sys/cdefs.h> 83 __KERNEL_RCSID(0, "$NetBSD: null_vnops.c,v 1.37 2011/01/10 11:11:03 hannken Exp $"); 84 85 #include <sys/param.h> 86 #include <sys/systm.h> 87 #include <sys/vnode.h> 88 89 #include <miscfs/genfs/genfs.h> 90 #include <miscfs/genfs/layer_extern.h> 91 #include <miscfs/nullfs/null.h> 92 93 /* 94 * Global VFS data structures. 95 */ 96 97 int (**null_vnodeop_p)(void *); 98 99 const struct vnodeopv_entry_desc null_vnodeop_entries[] = { 100 { &vop_default_desc, layer_bypass }, 101 102 { &vop_lookup_desc, layer_lookup }, 103 { &vop_setattr_desc, layer_setattr }, 104 { &vop_getattr_desc, layer_getattr }, 105 { &vop_access_desc, layer_access }, 106 { &vop_fsync_desc, layer_fsync }, 107 { &vop_inactive_desc, layer_inactive }, 108 { &vop_reclaim_desc, layer_reclaim }, 109 { &vop_print_desc, layer_print }, 110 { &vop_remove_desc, layer_remove }, 111 { &vop_rename_desc, layer_rename }, 112 { &vop_revoke_desc, layer_revoke }, 113 { &vop_rmdir_desc, layer_rmdir }, 114 115 { &vop_open_desc, layer_open }, /* mount option handling */ 116 117 { &vop_bwrite_desc, layer_bwrite }, 118 { &vop_bmap_desc, layer_bmap }, 119 { &vop_getpages_desc, layer_getpages }, 120 { &vop_putpages_desc, layer_putpages }, 121 122 { NULL, NULL } 123 }; 124 125 const struct vnodeopv_desc null_vnodeop_opv_desc = { 126 &null_vnodeop_p, null_vnodeop_entries 127 }; 128