| 1 | /* $NetBSD: null_vnops.c,v 1.39 2014/02/27 16:51:38 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 1.39 2014/02/27 16:51:38 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_lock_desc, layer_lock }, |
| 110 | { &vop_print_desc, layer_print }, |
| 111 | { &vop_remove_desc, layer_remove }, |
| 112 | { &vop_rename_desc, layer_rename }, |
| 113 | { &vop_revoke_desc, layer_revoke }, |
| 114 | { &vop_rmdir_desc, layer_rmdir }, |
| 115 | |
| 116 | { &vop_open_desc, layer_open }, /* mount option handling */ |
| 117 | |
| 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 | |