1 /* $NetBSD: tmpfs_specops.c,v 1.6 2005/12/11 12:24:29 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9 * 2005 program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * tmpfs vnode interface for special devices. 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: tmpfs_specops.c,v 1.6 2005/12/11 12:24:29 christos Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/vnode.h> 49 50 #include <fs/tmpfs/tmpfs.h> 51 #include <fs/tmpfs/tmpfs_specops.h> 52 53 /* --------------------------------------------------------------------- */ 54 55 /* 56 * vnode operations vector used for special devices stored in a tmpfs 57 * file system. 58 */ 59 int (**tmpfs_specop_p)(void *); 60 const struct vnodeopv_entry_desc tmpfs_specop_entries[] = { 61 { &vop_default_desc, vn_default_error }, 62 { &vop_lookup_desc, tmpfs_spec_lookup }, 63 { &vop_create_desc, tmpfs_spec_create }, 64 { &vop_mknod_desc, tmpfs_spec_mknod }, 65 { &vop_open_desc, tmpfs_spec_open }, 66 { &vop_close_desc, tmpfs_spec_close }, 67 { &vop_access_desc, tmpfs_spec_access }, 68 { &vop_getattr_desc, tmpfs_spec_getattr }, 69 { &vop_setattr_desc, tmpfs_spec_setattr }, 70 { &vop_read_desc, tmpfs_spec_read }, 71 { &vop_write_desc, tmpfs_spec_write }, 72 { &vop_ioctl_desc, tmpfs_spec_ioctl }, 73 { &vop_fcntl_desc, tmpfs_spec_fcntl }, 74 { &vop_poll_desc, tmpfs_spec_poll }, 75 { &vop_kqfilter_desc, tmpfs_spec_kqfilter }, 76 { &vop_revoke_desc, tmpfs_spec_revoke }, 77 { &vop_mmap_desc, tmpfs_spec_mmap }, 78 { &vop_fsync_desc, tmpfs_spec_fsync }, 79 { &vop_seek_desc, tmpfs_spec_seek }, 80 { &vop_remove_desc, tmpfs_spec_remove }, 81 { &vop_link_desc, tmpfs_spec_link }, 82 { &vop_rename_desc, tmpfs_spec_rename }, 83 { &vop_mkdir_desc, tmpfs_spec_mkdir }, 84 { &vop_rmdir_desc, tmpfs_spec_rmdir }, 85 { &vop_symlink_desc, tmpfs_spec_symlink }, 86 { &vop_readdir_desc, tmpfs_spec_readdir }, 87 { &vop_readlink_desc, tmpfs_spec_readlink }, 88 { &vop_abortop_desc, tmpfs_spec_abortop }, 89 { &vop_inactive_desc, tmpfs_spec_inactive }, 90 { &vop_reclaim_desc, tmpfs_spec_reclaim }, 91 { &vop_lock_desc, tmpfs_spec_lock }, 92 { &vop_unlock_desc, tmpfs_spec_unlock }, 93 { &vop_bmap_desc, tmpfs_spec_bmap }, 94 { &vop_strategy_desc, tmpfs_spec_strategy }, 95 { &vop_print_desc, tmpfs_spec_print }, 96 { &vop_pathconf_desc, tmpfs_spec_pathconf }, 97 { &vop_islocked_desc, tmpfs_spec_islocked }, 98 { &vop_advlock_desc, tmpfs_spec_advlock }, 99 { &vop_lease_desc, tmpfs_spec_lease }, 100 { &vop_bwrite_desc, tmpfs_spec_bwrite }, 101 { &vop_getpages_desc, tmpfs_spec_getpages }, 102 { &vop_putpages_desc, tmpfs_spec_putpages }, 103 { NULL, NULL } 104 }; 105 const struct vnodeopv_desc tmpfs_specop_opv_desc = 106 { &tmpfs_specop_p, tmpfs_specop_entries }; 107 108 /* --------------------------------------------------------------------- */ 109 110 int 111 tmpfs_spec_close(void *v) 112 { 113 struct vnode *vp = ((struct vop_close_args *)v)->a_vp; 114 115 int error; 116 117 tmpfs_update(vp, NULL, NULL, UPDATE_CLOSE); 118 error = VOCALL(spec_vnodeop_p, VOFFSET(vop_close), v); 119 120 return error; 121 } 122 123 /* --------------------------------------------------------------------- */ 124 125 int 126 tmpfs_spec_read(void *v) 127 { 128 struct vnode *vp = ((struct vop_read_args *)v)->a_vp; 129 130 VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_ACCESSED; 131 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 132 } 133 134 /* --------------------------------------------------------------------- */ 135 136 int 137 tmpfs_spec_write(void *v) 138 { 139 struct vnode *vp = ((struct vop_write_args *)v)->a_vp; 140 141 VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_MODIFIED; 142 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 143 } 144