diff options
Diffstat (limited to 'usr.sbin/makefs/ffs/ufs_bmap.c')
| -rw-r--r-- | usr.sbin/makefs/ffs/ufs_bmap.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/usr.sbin/makefs/ffs/ufs_bmap.c b/usr.sbin/makefs/ffs/ufs_bmap.c deleted file mode 100644 index 85c1d87..0000000 --- a/usr.sbin/makefs/ffs/ufs_bmap.c +++ /dev/null @@ -1,142 +0,0 @@ -/* $NetBSD: ufs_bmap.c,v 1.14 2004/06/20 22:20:18 jmc Exp $ */ -/* From: NetBSD: ufs_bmap.c,v 1.14 2001/11/08 05:00:51 chs Exp */ - -/* - * Copyright (c) 1989, 1991, 1993 - * The Regents of the University of California. All rights reserved. - * (c) UNIX System Laboratories, Inc. - * All or some portions of this file are derived from material licensed - * to the University of California by American Telephone and Telegraph - * Co. or Unix System Laboratories, Inc. and are reproduced herein with - * the permission of UNIX System Laboratories, Inc. - * - * 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. 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. - * - * @(#)ufs_bmap.c 8.8 (Berkeley) 8/11/95 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/time.h> - -#include <assert.h> -#include <errno.h> -#include <strings.h> - -#include "makefs.h" - -#include <ufs/ufs/dinode.h> -#include <ufs/ffs/fs.h> - -#include "ffs/ufs_bswap.h" -#include "ffs/ufs_inode.h" -#include "ffs/ffs_extern.h" - -/* - * Create an array of logical block number/offset pairs which represent the - * path of indirect blocks required to access a data block. The first "pair" - * contains the logical block number of the appropriate single, double or - * triple indirect block and the offset into the inode indirect block array. - * Note, the logical block number of the inode single/double/triple indirect - * block appears twice in the array, once with the offset into the i_ffs_ib and - * once with the offset into the page itself. - */ -int -ufs_getlbns(struct inode *ip, daddr_t bn, struct indir *ap, int *nump) -{ - daddr_t metalbn, realbn; - int64_t blockcnt; - int lbc; - int i, numlevels, off; - u_long lognindir; - - lognindir = ffs(NINDIR(ip->i_fs)) - 1; - if (nump) - *nump = 0; - numlevels = 0; - realbn = bn; - if ((long)bn < 0) - bn = -(long)bn; - - assert (bn >= NDADDR); - - /* - * Determine the number of levels of indirection. After this loop - * is done, blockcnt indicates the number of data blocks possible - * at the given level of indirection, and NIADDR - i is the number - * of levels of indirection needed to locate the requested block. - */ - - bn -= NDADDR; - for (lbc = 0, i = NIADDR;; i--, bn -= blockcnt) { - if (i == 0) - return (EFBIG); - - lbc += lognindir; - blockcnt = (int64_t)1 << lbc; - - if (bn < blockcnt) - break; - } - - /* Calculate the address of the first meta-block. */ - if (realbn >= 0) - metalbn = -(realbn - bn + NIADDR - i); - else - metalbn = -(-realbn - bn + NIADDR - i); - - /* - * At each iteration, off is the offset into the bap array which is - * an array of disk addresses at the current level of indirection. - * The logical block number and the offset in that block are stored - * into the argument array. - */ - ap->in_lbn = metalbn; - ap->in_off = off = NIADDR - i; - ap->in_exists = 0; - ap++; - for (++numlevels; i <= NIADDR; i++) { - /* If searching for a meta-data block, quit when found. */ - if (metalbn == realbn) - break; - - lbc -= lognindir; - blockcnt = (int64_t)1 << lbc; - off = (bn >> lbc) & (NINDIR(ip->i_fs) - 1); - - ++numlevels; - ap->in_lbn = metalbn; - ap->in_off = off; - ap->in_exists = 0; - ++ap; - - metalbn -= -1 + (off << lbc); - } - if (nump) - *nump = numlevels; - return (0); -} |
