1 /* $OpenBSD: tmpfs_specops.c,v 1.4 2013/12/23 20:35:19 tedu 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 #if 0 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: tmpfs_specops.c,v 1.10 2011/05/24 20:17:49 rmind Exp $"); 41 #endif 42 43 #include <sys/param.h> 44 #include <sys/vnode.h> 45 #include <sys/specdev.h> 46 #include <tmpfs/tmpfs_vnops.h> 47 48 #include <tmpfs/tmpfs.h> 49 50 int tmpfs_spec_close (void *); 51 int tmpfs_spec_read (void *); 52 int tmpfs_spec_write (void *); 53 54 /* 55 * vnode operations vector used for special devices stored in a tmpfs 56 * file system. 57 */ 58 59 struct vops tmpfs_specvops = { 60 .vop_close = spec_close, 61 .vop_access = tmpfs_access, 62 .vop_getattr = tmpfs_getattr, 63 .vop_setattr = tmpfs_setattr, 64 .vop_read = tmpfs_spec_read, 65 .vop_write = tmpfs_spec_write, 66 .vop_fsync = spec_fsync, 67 .vop_inactive = tmpfs_inactive, 68 .vop_reclaim = tmpfs_reclaim, 69 .vop_lock = tmpfs_lock, 70 .vop_unlock = tmpfs_unlock, 71 .vop_print = tmpfs_print, 72 .vop_islocked = tmpfs_islocked, 73 74 /* keep in sync with spec_vops */ 75 .vop_lookup = vop_generic_lookup, 76 .vop_create = spec_badop, 77 .vop_mknod = spec_badop, 78 .vop_open = spec_open, 79 .vop_ioctl = spec_ioctl, 80 .vop_poll = spec_poll, 81 .vop_kqfilter = spec_kqfilter, 82 .vop_revoke = vop_generic_revoke, 83 .vop_remove = spec_badop, 84 .vop_link = spec_badop, 85 .vop_rename = spec_badop, 86 .vop_mkdir = spec_badop, 87 .vop_rmdir = spec_badop, 88 .vop_symlink = spec_badop, 89 .vop_readdir = spec_badop, 90 .vop_readlink = spec_badop, 91 .vop_abortop = spec_badop, 92 .vop_bmap = vop_generic_bmap, 93 .vop_strategy = spec_strategy, 94 .vop_pathconf = spec_pathconf, 95 .vop_advlock = spec_advlock, 96 .vop_bwrite = vop_generic_bwrite, 97 }; 98 99 int 100 tmpfs_spec_read(void *v) 101 { 102 struct vop_read_args /* { 103 struct vnode *a_vp; 104 struct uio *a_uio; 105 int a_ioflag; 106 kauth_cred_t a_cred; 107 } */ *ap = v; 108 struct vnode *vp = ap->a_vp; 109 110 tmpfs_update(VP_TO_TMPFS_NODE(vp), TMPFS_NODE_ACCESSED); 111 return (spec_read(ap)); 112 } 113 114 int 115 tmpfs_spec_write(void *v) 116 { 117 struct vop_write_args /* { 118 struct vnode *a_vp; 119 struct uio *a_uio; 120 int a_ioflag; 121 kauth_cred_t a_cred; 122 } */ *ap = v; 123 struct vnode *vp = ap->a_vp; 124 125 tmpfs_update(VP_TO_TMPFS_NODE(vp), TMPFS_NODE_MODIFIED); 126 return (spec_write(ap)); 127 } 128