257 lines
7.1 KiB
C
257 lines
7.1 KiB
C
/* $NetBSD: ffs_inode.c,v 1.22 2013/06/23 02:06:04 dholland Exp $ */
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/*-
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* Copyright (c) 1980, 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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__RCSID("$NetBSD: ffs_inode.c,v 1.22 2013/06/23 02:06:04 dholland Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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#include <ufs/ufs/ufs_bswap.h>
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#include <protocols/dumprestore.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fts.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "dump.h"
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static struct fs *sblock;
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static off_t sblock_try[] = SBLOCKSEARCH;
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int is_ufs2;
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/*
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* Read the superblock from disk, and check its magic number.
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* Determine whether byte-swapping needs to be done on this file system.
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*/
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int
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fs_read_sblock(char *superblock)
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{
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int i;
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int ns = 0;
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sblock = (struct fs *)superblock;
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for (i = 0; ; i++) {
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if (sblock_try[i] == -1)
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quit("can't find superblock\n");
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rawread(sblock_try[i], (char *)superblock, MAXBSIZE);
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switch(sblock->fs_magic) {
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case FS_UFS2_MAGIC:
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is_ufs2 = 1;
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/*FALLTHROUGH*/
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case FS_UFS1_MAGIC:
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break;
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case FS_UFS2_MAGIC_SWAPPED:
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is_ufs2 = 1;
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/*FALLTHROUGH*/
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case FS_UFS1_MAGIC_SWAPPED:
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ns = 1;
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ffs_sb_swap(sblock, sblock);
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break;
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default:
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continue;
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}
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if (!is_ufs2 && sblock_try[i] == SBLOCK_UFS2)
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continue;
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if ((is_ufs2 || sblock->fs_old_flags & FS_FLAGS_UPDATED)
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&& sblock_try[i] != sblock->fs_sblockloc)
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continue;
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break;
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}
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return ns;
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}
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/*
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* Fill in the ufsi struct, as well as the maxino and dev_bsize global
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* variables.
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*/
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struct ufsi *
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fs_parametrize(void)
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{
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static struct ufsi ufsi;
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#ifdef FS_44INODEFMT
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if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) {
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spcl.c_flags = iswap32(iswap32(spcl.c_flags) | DR_NEWINODEFMT);
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} else {
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/*
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* Determine parameters for older file systems. From
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* /sys/ufs/ffs/ffs_vfsops.c::ffs_oldfscompat()
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*
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* XXX: not sure if other variables (fs_npsect, fs_interleave,
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* fs_nrpos, fs_maxfilesize) need to be fudged too.
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*/
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sblock->fs_qbmask = ~sblock->fs_bmask;
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sblock->fs_qfmask = ~sblock->fs_fmask;
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}
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#endif
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/* Fill out ufsi struct */
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ufsi.ufs_dsize = FFS_FSBTODB(sblock,sblock->fs_size);
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ufsi.ufs_bsize = sblock->fs_bsize;
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ufsi.ufs_bshift = sblock->fs_bshift;
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ufsi.ufs_fsize = sblock->fs_fsize;
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ufsi.ufs_frag = sblock->fs_frag;
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ufsi.ufs_fsatoda = sblock->fs_fsbtodb;
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ufsi.ufs_nindir = sblock->fs_nindir;
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ufsi.ufs_inopb = sblock->fs_inopb;
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ufsi.ufs_maxsymlinklen = sblock->fs_maxsymlinklen;
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ufsi.ufs_bmask = sblock->fs_bmask;
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ufsi.ufs_fmask = sblock->fs_fmask;
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ufsi.ufs_qbmask = sblock->fs_qbmask;
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ufsi.ufs_qfmask = sblock->fs_qfmask;
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dev_bsize = sblock->fs_fsize / FFS_FSBTODB(sblock, 1);
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return &ufsi;
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}
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ino_t
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fs_maxino(void)
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{
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return sblock->fs_ipg * sblock->fs_ncg;
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}
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void
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fs_mapinodes(ino_t maxino __unused, u_int64_t *tape_size, int *anydirskipped)
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{
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int i, cg, inosused;
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struct cg *cgp;
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ino_t ino;
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char *cp;
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if ((cgp = malloc(sblock->fs_cgsize)) == NULL)
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quit("fs_mapinodes: cannot allocate memory.\n");
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for (cg = 0; cg < sblock->fs_ncg; cg++) {
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ino = cg * sblock->fs_ipg;
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bread(FFS_FSBTODB(sblock, cgtod(sblock, cg)), (char *)cgp,
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sblock->fs_cgsize);
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if (needswap)
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ffs_cg_swap(cgp, cgp, sblock);
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if (sblock->fs_magic == FS_UFS2_MAGIC)
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inosused = cgp->cg_initediblk;
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else
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inosused = sblock->fs_ipg;
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/*
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* If we are using soft updates, then we can trust the
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* cylinder group inode allocation maps to tell us which
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* inodes are allocated. We will scan the used inode map
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* to find the inodes that are really in use, and then
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* read only those inodes in from disk.
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*/
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if (sblock->fs_flags & FS_DOSOFTDEP) {
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if (!cg_chkmagic(cgp, 0))
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quit("mapfiles: cg %d: bad magic number\n", cg);
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cp = &cg_inosused(cgp, 0)[(inosused - 1) / CHAR_BIT];
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for ( ; inosused > 0; inosused -= CHAR_BIT, cp--) {
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if (*cp == 0)
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continue;
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for (i = 1 << (CHAR_BIT - 1); i > 0; i >>= 1) {
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if (*cp & i)
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break;
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inosused--;
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}
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break;
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}
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if (inosused <= 0)
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continue;
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}
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for (i = 0; i < inosused; i++, ino++) {
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if (ino < UFS_ROOTINO)
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continue;
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mapfileino(ino, tape_size, anydirskipped);
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}
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}
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free(cgp);
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}
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union dinode *
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getino(ino_t inum)
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{
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static ino_t minino, maxino;
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static caddr_t inoblock;
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int ntoswap, i;
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struct ufs1_dinode *dp1;
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struct ufs2_dinode *dp2;
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if (inoblock == NULL && (inoblock = malloc(ufsib->ufs_bsize)) == NULL)
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quit("cannot allocate inode memory.\n");
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curino = inum;
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if (inum >= minino && inum < maxino)
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goto gotit;
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bread(fsatoda(ufsib, ino_to_fsba(sblock, inum)), (char *)inoblock,
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(int)ufsib->ufs_bsize);
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minino = inum - (inum % FFS_INOPB(sblock));
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maxino = minino + FFS_INOPB(sblock);
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if (needswap) {
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if (is_ufs2) {
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dp2 = (struct ufs2_dinode *)inoblock;
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ntoswap = ufsib->ufs_bsize / sizeof(struct ufs2_dinode);
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for (i = 0; i < ntoswap; i++)
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ffs_dinode2_swap(&dp2[i], &dp2[i]);
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} else {
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dp1 = (struct ufs1_dinode *)inoblock;
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ntoswap = ufsib->ufs_bsize / sizeof(struct ufs1_dinode);
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for (i = 0; i < ntoswap; i++)
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ffs_dinode1_swap(&dp1[i], &dp1[i]);
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}
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}
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gotit:
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if (is_ufs2) {
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dp2 = &((struct ufs2_dinode *)inoblock)[inum - minino];
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return (union dinode *)dp2;
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}
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dp1 = &((struct ufs1_dinode *)inoblock)[inum - minino];
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return ((union dinode *)dp1);
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}
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