NetBSD/sbin/dump/ffs_inode.c

254 lines
7.0 KiB
C

/* $NetBSD: ffs_inode.c,v 1.13 2003/08/07 10:04:14 agc Exp $ */
/*-
* Copyright (c) 1980, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
__RCSID("$NetBSD: ffs_inode.c,v 1.13 2003/08/07 10:04:14 agc Exp $");
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <ufs/ufs/ufs_bswap.h>
#include <protocols/dumprestore.h>
#include <ctype.h>
#include <errno.h>
#include <fts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "dump.h"
struct fs *sblock;
static off_t sblock_try[] = SBLOCKSEARCH;
off_t sblockloc;
int is_ufs2;
/*
* Read the superblock from disk, and check its magic number.
* Determine whether byte-swapping needs to be done on this file system.
*/
int
fs_read_sblock(char *superblock)
{
int i;
int ns = 0;
sblock = (struct fs *)superblock;
for (i = 0; i < sblock_try[i] != -1; i++) {
rawread(sblock_try[i], (char *)superblock, MAXBSIZE);
switch(sblock->fs_magic) {
case FS_UFS2_MAGIC:
is_ufs2 = 1;
/*FALLTHROUGH*/
case FS_UFS1_MAGIC:
goto found;
case FS_UFS2_MAGIC_SWAPPED:
is_ufs2 = 1;
/*FALLTHROUGH*/
case FS_UFS1_MAGIC_SWAPPED:
ns = 1;
ffs_sb_swap(sblock, sblock);
goto found;
default:
continue;
}
}
quit("can't find superblock\n");
found:
if (is_ufs2 && sblock_try[i] != sblock->fs_sblockloc)
quit("bad superblock\n");
return 0;
}
/*
* Fill in the ufsi struct, as well as the maxino and dev_bsize global
* variables.
*/
struct ufsi *
fs_parametrize(void)
{
static struct ufsi ufsi;
#ifdef FS_44INODEFMT
if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) {
spcl.c_flags = iswap32(iswap32(spcl.c_flags) | DR_NEWINODEFMT);
} else {
/*
* Determine parameters for older file systems. From
* /sys/ufs/ffs/ffs_vfsops.c::ffs_oldfscompat()
*
* XXX: not sure if other variables (fs_npsect, fs_interleave,
* fs_nrpos, fs_maxfilesize) need to be fudged too.
*/
sblock->fs_qbmask = ~sblock->fs_bmask;
sblock->fs_qfmask = ~sblock->fs_fmask;
}
#endif
/* Fill out ufsi struct */
ufsi.ufs_dsize = fsbtodb(sblock,sblock->fs_size);
ufsi.ufs_bsize = sblock->fs_bsize;
ufsi.ufs_bshift = sblock->fs_bshift;
ufsi.ufs_fsize = sblock->fs_fsize;
ufsi.ufs_frag = sblock->fs_frag;
ufsi.ufs_fsatoda = sblock->fs_fsbtodb;
ufsi.ufs_nindir = sblock->fs_nindir;
ufsi.ufs_inopb = sblock->fs_inopb;
ufsi.ufs_maxsymlinklen = sblock->fs_maxsymlinklen;
ufsi.ufs_bmask = sblock->fs_bmask;
ufsi.ufs_fmask = sblock->fs_fmask;
ufsi.ufs_qbmask = sblock->fs_qbmask;
ufsi.ufs_qfmask = sblock->fs_qfmask;
dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
return &ufsi;
}
ino_t
fs_maxino(void)
{
return sblock->fs_ipg * sblock->fs_ncg;
}
void
fs_mapinodes(ino_t maxino, u_int64_t *tape_size, int *anydirskipped)
{
int i, cg, inosused;
struct cg *cgp;
ino_t ino;
char *cp;
if ((cgp = malloc(sblock->fs_cgsize)) == NULL)
quit("fs_mapinodes: cannot allocate memory.\n");
for (cg = 0; cg < sblock->fs_ncg; cg++) {
ino = cg * sblock->fs_ipg;
bread(fsbtodb(sblock, cgtod(sblock, cg)), (char *)cgp,
sblock->fs_cgsize);
if (needswap)
ffs_cg_swap(cgp, cgp, sblock);
if (sblock->fs_magic == FS_UFS2_MAGIC)
inosused = cgp->cg_initediblk;
else
inosused = sblock->fs_ipg;
/*
* If we are using soft updates, then we can trust the
* cylinder group inode allocation maps to tell us which
* inodes are allocated. We will scan the used inode map
* to find the inodes that are really in use, and then
* read only those inodes in from disk.
*/
if (sblock->fs_flags & FS_DOSOFTDEP) {
if (!cg_chkmagic(cgp, 0))
quit("mapfiles: cg %d: bad magic number\n", cg);
cp = &cg_inosused(cgp, 0)[(inosused - 1) / CHAR_BIT];
for ( ; inosused > 0; inosused -= CHAR_BIT, cp--) {
if (*cp == 0)
continue;
for (i = 1 << (CHAR_BIT - 1); i > 0; i >>= 1) {
if (*cp & i)
break;
inosused--;
}
break;
}
if (inosused <= 0)
continue;
}
for (i = 0; i < inosused; i++, ino++) {
if (ino < ROOTINO)
continue;
mapfileino(ino, tape_size, anydirskipped);
}
}
free(cgp);
}
union dinode *
getino(ino_t inum)
{
static ino_t minino, maxino;
static caddr_t inoblock;
int ntoswap, i;
struct ufs1_dinode *dp1;
struct ufs2_dinode *dp2;
if (inoblock == NULL && (inoblock = malloc(ufsib->ufs_bsize)) == NULL)
quit("cannot allocate inode memory.\n");
curino = inum;
if (inum >= minino && inum < maxino)
goto gotit;
bread(fsatoda(ufsib, ino_to_fsba(sblock, inum)), (char *)inoblock,
(int)ufsib->ufs_bsize);
minino = inum - (inum % INOPB(sblock));
maxino = minino + INOPB(sblock);
if (needswap) {
if (is_ufs2) {
dp2 = (struct ufs2_dinode *)inoblock;
ntoswap = ufsib->ufs_bsize / sizeof(struct ufs2_dinode);
for (i = 0; i < ntoswap; i++)
ffs_dinode2_swap(&dp2[i], &dp2[i]);
} else {
dp1 = (struct ufs1_dinode *)inoblock;
ntoswap = ufsib->ufs_bsize / sizeof(struct ufs1_dinode);
for (i = 0; i < ntoswap; i++)
ffs_dinode1_swap(&dp1[i], &dp1[i]);
}
}
gotit:
if (is_ufs2) {
dp2 = &((struct ufs2_dinode *)inoblock)[inum - minino];
return (union dinode *)dp2;
}
dp1 = &((struct ufs1_dinode *)inoblock)[inum - minino];
return ((union dinode *)dp1);
}