/* * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* $NetBSD: cd9660_bmap.c,v 1.5 1994/12/13 22:33:12 mycroft Exp $ */ /*- * Copyright (c) 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension * Support code is derived from software contributed to Berkeley * by Atsushi Murai (amurai@spec.co.jp). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)cd9660_bmap.c 8.4 (Berkeley) 12/5/94 */ #include <sys/param.h> #include <sys/vnode.h> #include <sys/mount.h> #include <sys/namei.h> #include <sys/file.h> #include <isofs/cd9660/iso.h> #include <isofs/cd9660/cd9660_node.h> /* blktooff converts a logical block number to a file offset */ int cd9660_blktooff(struct vnop_blktooff_args *ap) { register struct iso_node *ip; register struct iso_mnt *imp; if (ap->a_vp == NULL) return (EINVAL); ip = VTOI(ap->a_vp); imp = ip->i_mnt; *ap->a_offset = (off_t)lblktosize(imp, ap->a_lblkno); return (0); } /* offtoblk converts a file offset to a logical block number */ int cd9660_offtoblk(struct vnop_offtoblk_args *ap) { register struct iso_node *ip; register struct iso_mnt *imp; if (ap->a_vp == NULL) return (EINVAL); ip = VTOI(ap->a_vp); imp = ip->i_mnt; *ap->a_lblkno = (daddr64_t)lblkno(imp, ap->a_offset); return (0); } int cd9660_blockmap(struct vnop_blockmap_args *ap) { struct iso_node *ip = VTOI(ap->a_vp); size_t cbytes; int devBlockSize = 0; off_t offset = ap->a_foffset; /* * Check for underlying vnode requests and ensure that logical * to physical mapping is requested. */ if (ap->a_bpn == NULL) return (0); devBlockSize = vfs_devblocksize(vnode_mount(ap->a_vp)); /* * Associated files have an Apple Double header */ if (ip->i_flag & ISO_ASSOCIATED) { if (offset < ADH_SIZE) { if (ap->a_run) *ap->a_run = 0; *ap->a_bpn = (daddr64_t)-1; goto out; } else { offset -= ADH_SIZE; } } *ap->a_bpn = (daddr64_t)(ip->iso_start + lblkno(ip->i_mnt, offset)); /* * Determine maximum number of contiguous bytes following the * requested offset. */ if (ap->a_run) { if (ip->i_size > offset) cbytes = ip->i_size - offset; else cbytes = 0; cbytes = (cbytes + (devBlockSize - 1)) & ~(devBlockSize - 1); *ap->a_run = MIN(cbytes, ap->a_size); }; out: if (ap->a_poff) *(int *)ap->a_poff = (long)offset & (devBlockSize - 1); return (0); }