diff options
Diffstat (limited to 'sys/isofs/cd9660/cd9660_bmap.c')
| -rw-r--r-- | sys/isofs/cd9660/cd9660_bmap.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/sys/isofs/cd9660/cd9660_bmap.c b/sys/isofs/cd9660/cd9660_bmap.c deleted file mode 100644 index 147f445..0000000 --- a/sys/isofs/cd9660/cd9660_bmap.c +++ /dev/null @@ -1,104 +0,0 @@ -/*- - * 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. - * 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 8.3 (Berkeley) 1/23/94 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/vnode.h> -#include <sys/mount.h> - -#include <isofs/cd9660/iso.h> -#include <isofs/cd9660/cd9660_node.h> - -/* - * Bmap converts a 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 bufobj **a_bop; - daddr_t *a_bnp; - int *a_runp; - int *a_runb; - } */ *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_bop != NULL) - *ap->a_bop = &ip->i_mnt->im_devvp->v_bufobj; - 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) << (bshift - DEV_BSHIFT); - - /* - * 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; - } - - if (ap->a_runb) { - *ap->a_runb = 0; - } - - return 0; -} |
