1 /* $OpenBSD: tmpfs_specops.c,v 1.8 2021/10/02 08:51:41 semarie 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_read (void *); 46 int tmpfs_spec_write (void *); 47 48 /* 49 * vnode operations vector used for special devices stored in a tmpfs 50 * file system. 51 */ 52 53 const struct vops tmpfs_specvops = { 54 .vop_close = spec_close, 55 .vop_access = tmpfs_access, 56 .vop_getattr = tmpfs_getattr, 57 .vop_setattr = tmpfs_setattr, 58 .vop_read = tmpfs_spec_read, 59 .vop_write = tmpfs_spec_write, 60 .vop_fsync = spec_fsync, 61 .vop_inactive = tmpfs_inactive, 62 .vop_reclaim = tmpfs_reclaim, 63 .vop_lock = tmpfs_lock, 64 .vop_unlock = tmpfs_unlock, 65 .vop_print = tmpfs_print, 66 .vop_islocked = tmpfs_islocked, 67 68 /* keep in sync with spec_vops */ 69 .vop_lookup = vop_generic_lookup, 70 .vop_create = vop_generic_badop, 71 .vop_mknod = vop_generic_badop, 72 .vop_open = spec_open, 73 .vop_ioctl = spec_ioctl, 74 .vop_poll = spec_poll, 75 .vop_kqfilter = spec_kqfilter, 76 .vop_revoke = vop_generic_revoke, 77 .vop_remove = vop_generic_badop, 78 .vop_link = vop_generic_badop, 79 .vop_rename = vop_generic_badop, 80 .vop_mkdir = vop_generic_badop, 81 .vop_rmdir = vop_generic_badop, 82 .vop_symlink = vop_generic_badop, 83 .vop_readdir = vop_generic_badop, 84 .vop_readlink = vop_generic_badop, 85 .vop_abortop = vop_generic_badop, 86 .vop_bmap = vop_generic_bmap, 87 .vop_strategy = spec_strategy, 88 .vop_pathconf = spec_pathconf, 89 .vop_advlock = spec_advlock, 90 .vop_bwrite = vop_generic_bwrite, 91 }; 92 93 int 94 tmpfs_spec_read(void *v) 95 { 96 struct vop_read_args /* { 97 struct vnode *a_vp; 98 struct uio *a_uio; 99 int a_ioflag; 100 kauth_cred_t a_cred; 101 } */ *ap = v; 102 struct vnode *vp = ap->a_vp; 103 104 tmpfs_update(VP_TO_TMPFS_NODE(vp), TMPFS_NODE_ACCESSED); 105 return (spec_read(ap)); 106 } 107 108 int 109 tmpfs_spec_write(void *v) 110 { 111 struct vop_write_args /* { 112 struct vnode *a_vp; 113 struct uio *a_uio; 114 int a_ioflag; 115 kauth_cred_t a_cred; 116 } */ *ap = v; 117 struct vnode *vp = ap->a_vp; 118 119 tmpfs_update(VP_TO_TMPFS_NODE(vp), TMPFS_NODE_MODIFIED); 120 return (spec_write(ap)); 121 } 122