1 /* $OpenBSD: tmpfs_specops.c,v 1.5 2015/01/21 22:26:52 deraadt Exp $ */ 2 /* $NetBSD: tmpfs_specops.c,v 1.10 2011/05/24 20:17:49 rmind Exp $ */ 3 4 /* 5 * Copyright (c) 2005 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 10 * 2005 program. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * tmpfs vnode interface for special devices. 36 */ 37 38 #include <sys/param.h> 39 #include <sys/vnode.h> 40 #include <sys/specdev.h> 41 #include <tmpfs/tmpfs_vnops.h> 42 43 #include <tmpfs/tmpfs.h> 44 45 int tmpfs_spec_close (void *); 46 int tmpfs_spec_read (void *); 47 int tmpfs_spec_write (void *); 48 49 /* 50 * vnode operations vector used for special devices stored in a tmpfs 51 * file system. 52 */ 53 54 struct vops tmpfs_specvops = { 55 .vop_close = spec_close, 56 .vop_access = tmpfs_access, 57 .vop_getattr = tmpfs_getattr, 58 .vop_setattr = tmpfs_setattr, 59 .vop_read = tmpfs_spec_read, 60 .vop_write = tmpfs_spec_write, 61 .vop_fsync = spec_fsync, 62 .vop_inactive = tmpfs_inactive, 63 .vop_reclaim = tmpfs_reclaim, 64 .vop_lock = tmpfs_lock, 65 .vop_unlock = tmpfs_unlock, 66 .vop_print = tmpfs_print, 67 .vop_islocked = tmpfs_islocked, 68 69 /* keep in sync with spec_vops */ 70 .vop_lookup = vop_generic_lookup, 71 .vop_create = spec_badop, 72 .vop_mknod = spec_badop, 73 .vop_open = spec_open, 74 .vop_ioctl = spec_ioctl, 75 .vop_poll = spec_poll, 76 .vop_kqfilter = spec_kqfilter, 77 .vop_revoke = vop_generic_revoke, 78 .vop_remove = spec_badop, 79 .vop_link = spec_badop, 80 .vop_rename = spec_badop, 81 .vop_mkdir = spec_badop, 82 .vop_rmdir = spec_badop, 83 .vop_symlink = spec_badop, 84 .vop_readdir = spec_badop, 85 .vop_readlink = spec_badop, 86 .vop_abortop = spec_badop, 87 .vop_bmap = vop_generic_bmap, 88 .vop_strategy = spec_strategy, 89 .vop_pathconf = spec_pathconf, 90 .vop_advlock = spec_advlock, 91 .vop_bwrite = vop_generic_bwrite, 92 }; 93 94 int 95 tmpfs_spec_read(void *v) 96 { 97 struct vop_read_args /* { 98 struct vnode *a_vp; 99 struct uio *a_uio; 100 int a_ioflag; 101 kauth_cred_t a_cred; 102 } */ *ap = v; 103 struct vnode *vp = ap->a_vp; 104 105 tmpfs_update(VP_TO_TMPFS_NODE(vp), TMPFS_NODE_ACCESSED); 106 return (spec_read(ap)); 107 } 108 109 int 110 tmpfs_spec_write(void *v) 111 { 112 struct vop_write_args /* { 113 struct vnode *a_vp; 114 struct uio *a_uio; 115 int a_ioflag; 116 kauth_cred_t a_cred; 117 } */ *ap = v; 118 struct vnode *vp = ap->a_vp; 119 120 tmpfs_update(VP_TO_TMPFS_NODE(vp), TMPFS_NODE_MODIFIED); 121 return (spec_write(ap)); 122 } 123