/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
*
- * 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. 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
+ * This 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.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
-#include <sys/buf.h>
#include <sys/file.h>
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/cd9660_node.h>
-/*
- * Bmap converts the logical block number of a file to its physical block
- * number on the disk. The conversion is done by using the logical block
- * number to index into the data block (extent) for the file.
- */
-int
-cd9660_bmap(ap)
- struct vop_bmap_args /* {
- struct vnode *a_vp;
- daddr_t a_bn;
- struct vnode **a_vpp;
- daddr_t *a_bnp;
- int *a_runp;
- } */ *ap;
-{
- struct iso_node *ip = VTOI(ap->a_vp);
- daddr_t lblkno = ap->a_bn;
- int bshift;
-
- /*
- * Check for underlying vnode requests and ensure that logical
- * to physical mapping is requested.
- */
- if (ap->a_vpp != NULL)
- *ap->a_vpp = ip->i_devvp;
- if (ap->a_bnp == NULL)
- return (0);
-
- /*
- * Compute the requested block number
- */
- bshift = ip->i_mnt->im_bshift;
- *ap->a_bnp = (ip->iso_start + lblkno);
-
- /*
- * Determine maximum number of readahead blocks following the
- * requested block.
- */
- if (ap->a_runp) {
- int nblk;
-
- nblk = (ip->i_size >> bshift) - (lblkno + 1);
- if (nblk <= 0)
- *ap->a_runp = 0;
- else if (nblk >= (MAXBSIZE >> bshift))
- *ap->a_runp = (MAXBSIZE >> bshift) - 1;
- else
- *ap->a_runp = nblk;
- }
-
- return (0);
-}
/* blktooff converts a logical block number to a file offset */
int
-cd9660_blktooff(ap)
- struct vop_blktooff_args /* {
- struct vnode *a_vp;
- daddr_t a_lblkno;
- off_t *a_offset;
- } */ *ap;
+cd9660_blktooff(struct vnop_blktooff_args *ap)
{
register struct iso_node *ip;
- register struct iso_mnt *imp;
+ register struct iso_mnt *imp;
if (ap->a_vp == NULL)
return (EINVAL);
/* offtoblk converts a file offset to a logical block number */
int
-cd9660_offtoblk(ap)
-struct vop_offtoblk_args /* {
- struct vnode *a_vp;
- off_t a_offset;
- daddr_t *a_lblkno;
- } */ *ap;
+cd9660_offtoblk(struct vnop_offtoblk_args *ap)
{
register struct iso_node *ip;
register struct iso_mnt *imp;
ip = VTOI(ap->a_vp);
imp = ip->i_mnt;
- *ap->a_lblkno = (daddr_t)lblkno(imp, ap->a_offset);
+ *ap->a_lblkno = (daddr64_t)lblkno(imp, ap->a_offset);
return (0);
}
int
-cd9660_cmap(ap)
-struct vop_cmap_args /* {
- struct vnode *a_vp;
- off_t a_offset;
- size_t a_size;
- daddr_t *a_bpn;
- size_t *a_run;
- void *a_poff;
-} */ *ap;
+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
if (ap->a_bpn == NULL)
return (0);
- VOP_DEVBLOCKSIZE(ip->i_devvp, &devBlockSize);
+ devBlockSize = vfs_devblocksize(vnode_mount(ap->a_vp));
- *ap->a_bpn = (daddr_t)(ip->iso_start + lblkno(ip->i_mnt, ap->a_foffset));
+ /*
+ * 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 > ap->a_foffset)
- cbytes = ip->i_size - ap->a_foffset;
+ if (ip->i_size > offset)
+ cbytes = ip->i_size - offset;
else
cbytes = 0;
*ap->a_run = MIN(cbytes, ap->a_size);
};
-
+out:
if (ap->a_poff)
- *(int *)ap->a_poff = (long)ap->a_foffset & (devBlockSize - 1);
+ *(int *)ap->a_poff = (long)offset & (devBlockSize - 1);
return (0);
}
projects / apple / xnu.git / blobdiff