+++ /dev/null
-/*
- * 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);
-}
-
projects / apple / xnu.git / blobdiff