1 /* $NetBSD: tmpfs_specops.c,v 1.2 2005/09/10 22:28:57 jmmv 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. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * tmpfs vnode interface for special devices. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: tmpfs_specops.c,v 1.2 2005/09/10 22:28:57 jmmv Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/vnode.h> 48 49 #include <fs/tmpfs/tmpfs.h> 50 #include <fs/tmpfs/tmpfs_specops.h> 51 52 /* --------------------------------------------------------------------- */ 53 54 /* 55 * vnode operations vector used for special devices stored in a tmpfs 56 * file system. 57 */ 58 int (**tmpfs_specop_p)(void *); 59 const struct vnodeopv_entry_desc tmpfs_specop_entries[] = { 60 { &vop_default_desc, vn_default_error }, 61 { &vop_lookup_desc, tmpfs_spec_lookup }, 62 { &vop_create_desc, tmpfs_spec_create }, 63 { &vop_mknod_desc, tmpfs_spec_mknod }, 64 { &vop_open_desc, tmpfs_spec_open }, 65 { &vop_close_desc, tmpfs_spec_close }, 66 { &vop_access_desc, tmpfs_spec_access }, 67 { &vop_getattr_desc, tmpfs_spec_getattr }, 68 { &vop_setattr_desc, tmpfs_spec_setattr }, 69 { &vop_read_desc, tmpfs_spec_read }, 70 { &vop_write_desc, tmpfs_spec_write }, 71 { &vop_ioctl_desc, tmpfs_spec_ioctl }, 72 { &vop_fcntl_desc, tmpfs_spec_fcntl }, 73 { &vop_poll_desc, tmpfs_spec_poll }, 74 { &vop_kqfilter_desc, tmpfs_spec_kqfilter }, 75 { &vop_revoke_desc, tmpfs_spec_revoke }, 76 { &vop_mmap_desc, tmpfs_spec_mmap }, 77 { &vop_fsync_desc, tmpfs_spec_fsync }, 78 { &vop_seek_desc, tmpfs_spec_seek }, 79 { &vop_remove_desc, tmpfs_spec_remove }, 80 { &vop_link_desc, tmpfs_spec_link }, 81 { &vop_rename_desc, tmpfs_spec_rename }, 82 { &vop_mkdir_desc, tmpfs_spec_mkdir }, 83 { &vop_rmdir_desc, tmpfs_spec_rmdir }, 84 { &vop_symlink_desc, tmpfs_spec_symlink }, 85 { &vop_readdir_desc, tmpfs_spec_readdir }, 86 { &vop_readlink_desc, tmpfs_spec_readlink }, 87 { &vop_abortop_desc, tmpfs_spec_abortop }, 88 { &vop_inactive_desc, tmpfs_spec_inactive }, 89 { &vop_reclaim_desc, tmpfs_spec_reclaim }, 90 { &vop_lock_desc, tmpfs_spec_lock }, 91 { &vop_unlock_desc, tmpfs_spec_unlock }, 92 { &vop_bmap_desc, tmpfs_spec_bmap }, 93 { &vop_strategy_desc, tmpfs_spec_strategy }, 94 { &vop_print_desc, tmpfs_spec_print }, 95 { &vop_pathconf_desc, tmpfs_spec_pathconf }, 96 { &vop_islocked_desc, tmpfs_spec_islocked }, 97 { &vop_advlock_desc, tmpfs_spec_advlock }, 98 { &vop_blkatoff_desc, tmpfs_spec_blkatoff }, 99 { &vop_valloc_desc, tmpfs_spec_valloc }, 100 { &vop_reallocblks_desc, tmpfs_spec_reallocblks }, 101 { &vop_vfree_desc, tmpfs_spec_vfree }, 102 { &vop_truncate_desc, tmpfs_spec_truncate }, 103 { &vop_update_desc, tmpfs_spec_update }, 104 { &vop_lease_desc, tmpfs_spec_lease }, 105 { &vop_bwrite_desc, tmpfs_spec_bwrite }, 106 { &vop_getpages_desc, tmpfs_spec_getpages }, 107 { &vop_putpages_desc, tmpfs_spec_putpages }, 108 { NULL, NULL } 109 }; 110 const struct vnodeopv_desc tmpfs_specop_opv_desc = 111 { &tmpfs_specop_p, tmpfs_specop_entries }; 112 113 /* --------------------------------------------------------------------- */ 114 115 int 116 tmpfs_spec_close(void *v) 117 { 118 struct vnode *vp = ((struct vop_close_args *)v)->a_vp; 119 120 int error; 121 122 error = VOP_UPDATE(vp, NULL, NULL, UPDATE_CLOSE); 123 if (error != 0) 124 error = VOCALL(spec_vnodeop_p, VOFFSET(vop_close), v); 125 126 return error; 127 } 128 129 /* --------------------------------------------------------------------- */ 130 131 int 132 tmpfs_spec_read(void *v) 133 { 134 struct vnode *vp = ((struct vop_read_args *)v)->a_vp; 135 136 VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_ACCESSED; 137 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 138 } 139 140 /* --------------------------------------------------------------------- */ 141 142 int 143 tmpfs_spec_write(void *v) 144 { 145 struct vnode *vp = ((struct vop_write_args *)v)->a_vp; 146 147 VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_MODIFIED; 148 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 149 } 150