521 lines
13 KiB
C
521 lines
13 KiB
C
/* $NetBSD: scan_ffs.c,v 1.32 2015/10/15 06:25:23 dholland Exp $ */
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/*
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* Copyright (c) 2005-2007 Juan Romero Pardines
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* Copyright (c) 1998 Niklas Hallqvist, Tobias Weingartner
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Currently it can detect FFS and LFS partitions (version 1 or 2)
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* up to 8192/65536 fragsize/blocksize.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: scan_ffs.c,v 1.32 2015/10/15 06:25:23 dholland Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <sys/dkio.h>
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#include <sys/ioctl.h>
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#include <sys/fcntl.h>
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#include <sys/mount.h>
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#include <ufs/lfs/lfs.h>
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#include <ufs/lfs/lfs_accessors.h>
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#include <ufs/lfs/lfs_extern.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <err.h>
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#include <util.h>
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#define BLK_CNT (blk + (n / 512))
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/* common struct for FFS/LFS */
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struct sblockinfo {
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struct lfs *lfs;
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struct fs *ffs;
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uint64_t lfs_off;
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uint64_t ffs_off;
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char lfs_path[MAXMNTLEN];
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char ffs_path[MAXMNTLEN];
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};
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static daddr_t blk, lastblk;
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static int eflag = 0;
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static int fflag = 0;
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static int flags = 0;
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static int sbaddr = 0; /* counter for the LFS superblocks */
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static char device[MAXPATHLEN];
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static const char *fstypes[] = { "NONE", "FFSv1", "FFSv2" };
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#define FSTYPE_NONE 0
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#define FSTYPE_FFSV1 1
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#define FSTYPE_FFSV2 2
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#define SBCOUNT 128 /* may be changed */
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#define SBPASS (SBCOUNT * SBLOCKSIZE / 512)
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/* This is only useful for LFS */
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/* first sblock address contains the correct offset */
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#define FIRST_SBLOCK_ADDRESS 1
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/* second and third sblock address contain lfs_fsmnt[MAXMNTLEN] */
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#define SECOND_SBLOCK_ADDRESS 2
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/* last sblock address in a LFS partition */
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#define MAX_SBLOCK_ADDRESS 10
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enum { NADA=0, VERBOSE=1, LABELS=2, BLOCKS=4 };
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/* FFS functions */
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static void ffs_printpart(struct sblockinfo *, int, size_t, int);
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static void ffs_scan(struct sblockinfo *, int);
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static int ffs_checkver(struct sblockinfo *);
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/* LFS functions */
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static void lfs_printpart(struct sblockinfo *, int, int);
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static void lfs_scan(struct sblockinfo *, int);
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/* common functions */
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static void usage(void) __dead;
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static int scan_disk(int, daddr_t, daddr_t, int);
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static int
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ffs_checkver(struct sblockinfo *sbi)
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{
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switch (sbi->ffs->fs_magic) {
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case FS_UFS1_MAGIC:
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case FS_UFS1_MAGIC_SWAPPED:
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sbi->ffs->fs_size = sbi->ffs->fs_old_size;
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return FSTYPE_FFSV1;
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case FS_UFS2_MAGIC:
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case FS_UFS2_MAGIC_SWAPPED:
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return FSTYPE_FFSV2;
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default:
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return FSTYPE_NONE;
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}
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}
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static void
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ffs_printpart(struct sblockinfo *sbi, int flag, size_t ffsize, int n)
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{
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int offset, ver;
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switch (flag) {
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case VERBOSE:
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switch (ffs_checkver(sbi)) {
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case FSTYPE_FFSV1:
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(void)printf("offset: %" PRIu64 " n: %d "
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"id: %x,%x size: %" PRIu64 "\n",
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BLK_CNT - (2 * SBLOCKSIZE / 512), n,
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sbi->ffs->fs_id[0], sbi->ffs->fs_id[1],
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(uint64_t)sbi->ffs->fs_size *
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sbi->ffs->fs_fsize / 512);
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break;
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case FSTYPE_FFSV2:
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(void)printf("offset: %" PRIu64 " n: %d "
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"id: %x,%x size: %" PRIu64 "\n",
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BLK_CNT - (ffsize * SBLOCKSIZE / 512+128),
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n, sbi->ffs->fs_id[0], sbi->ffs->fs_id[1],
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(uint64_t)sbi->ffs->fs_size *
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sbi->ffs->fs_fsize / 512);
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break;
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default:
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break;
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}
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break;
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case LABELS:
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(void)printf("X: %9" PRIu64,
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(uint64_t)(sbi->ffs->fs_size *
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sbi->ffs->fs_fsize / 512));
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switch (ffs_checkver(sbi)) {
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case FSTYPE_FFSV1:
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(void)printf(" %9" PRIu64,
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BLK_CNT - (ffsize * SBLOCKSIZE / 512));
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break;
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case FSTYPE_FFSV2:
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(void)printf(" %9" PRIu64,
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BLK_CNT - (ffsize * SBLOCKSIZE / 512 + 128));
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break;
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default:
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break;
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}
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(void)printf(" 4.2BSD %6d %5d %7d # %s [%s]\n",
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sbi->ffs->fs_fsize, sbi->ffs->fs_bsize,
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sbi->ffs->fs_old_cpg,
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sbi->ffs_path, fstypes[ffs_checkver(sbi)]);
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break;
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case BLOCKS:
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default:
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(void)printf("%s ", fstypes[ffs_checkver(sbi)]);
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ver = ffs_checkver(sbi);
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if (ver == FSTYPE_NONE)
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break;
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offset = 0;
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if (flag == BLOCKS)
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(void)printf("sb ");
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else if (ver == FSTYPE_FFSV1)
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offset = (2 * SBLOCKSIZE / 512);
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else if (ver == FSTYPE_FFSV2)
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offset = (ffsize * SBLOCKSIZE / 512 + 128);
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(void)printf("at %" PRIu64, BLK_CNT - offset);
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(void)printf(" size %" PRIu64 ", last mounted on %s\n",
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(uint64_t)(sbi->ffs->fs_size *
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sbi->ffs->fs_fsize / 512), sbi->ffs_path);
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break;
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}
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}
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static void
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ffs_scan(struct sblockinfo *sbi, int n)
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{
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size_t i = 0;
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if (flags & BLOCKS) {
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ffs_printpart(sbi, BLOCKS, 0, n);
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return;
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}
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if (flags & VERBOSE)
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ffs_printpart(sbi, VERBOSE, NADA, n);
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switch (ffs_checkver(sbi)) {
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case FSTYPE_FFSV1:
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/* fsize/bsize > 512/4096 and < 4096/32768. */
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if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 512)) {
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i = 2;
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/* fsize/bsize 4096/32768. */
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} else if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 170)) {
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i = 4;
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/* fsize/bsize 8192/65536 */
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} else if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 73)) {
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i = 8;
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} else
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break;
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if (flags & LABELS)
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ffs_printpart(sbi, LABELS, i, n);
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else
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ffs_printpart(sbi, NADA, i, n);
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break;
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case FSTYPE_FFSV2:
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/*
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* That checks for FFSv2 partitions with fragsize/blocksize:
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* 512/4096, 1024/8192, 2048/16384, 4096/32768 and 8192/65536.
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* Really enough for now.
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*/
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for (i = 1; i < 16; i <<= 1)
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if ((BLK_CNT - lastblk) == (daddr_t)(i * SBLOCKSIZE / 512)) {
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if (flags & LABELS)
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ffs_printpart(sbi, LABELS, i, n);
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else
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ffs_printpart(sbi, NADA, i, n);
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}
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break;
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}
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}
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static void
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lfs_printpart(struct sblockinfo *sbi, int flag, int n)
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{
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if (flags & VERBOSE)
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(void)printf("offset: %" PRIu64 " size %" PRIu64
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" fsid %" PRIx32 "\n", sbi->lfs_off,
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lfs_sb_getsize(sbi->lfs),
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lfs_sb_getident(sbi->lfs));
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switch (flag) {
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case LABELS:
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(void)printf("X: %9" PRIu64,
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(lfs_sb_getsize(sbi->lfs) *
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lfs_sb_getfsize(sbi->lfs) / 512));
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(void)printf(" %9" PRIu64, sbi->lfs_off);
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(void)printf(" 4.4LFS %6d %5d %7d # %s [LFS%d v%d]\n",
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lfs_sb_getfsize(sbi->lfs), lfs_sb_getbsize(sbi->lfs),
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lfs_sb_getnseg(sbi->lfs), sbi->lfs_path,
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sbi->lfs->lfs_is64 ? 64 : 32,
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lfs_sb_getversion(sbi->lfs));
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break;
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case BLOCKS:
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(void)printf("LFS%d v%d", sbi->lfs->lfs_is64 ? 64 : 32,
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lfs_sb_getversion(sbi->lfs));
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(void)printf(" sb at %" PRIu64, sbi->lfs_off + btodb(LFS_LABELPAD));
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(void)printf(" fsid %" PRIx32, lfs_sb_getident(sbi->lfs));
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(void)printf(" size %" PRIu64 ", last mounted on %s\n",
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(lfs_sb_getsize(sbi->lfs) *
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lfs_sb_getfsize(sbi->lfs) / 512), sbi->lfs_path);
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break;
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default:
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(void)printf("LFS%d v%d ", sbi->lfs->lfs_is64 ? 64 : 32,
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lfs_sb_getversion(sbi->lfs));
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(void)printf("at %" PRIu64, sbi->lfs_off);
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(void)printf(" size %" PRIu64 ", last mounted on %s\n",
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(lfs_sb_getsize(sbi->lfs) *
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lfs_sb_getfsize(sbi->lfs) / 512), sbi->lfs_path);
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break;
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}
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}
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static void
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lfs_scan(struct sblockinfo *sbi, int n)
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{
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size_t namesize;
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/* Check to see if the sb checksums correctly */
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if (lfs_sb_cksum(sbi->lfs) != lfs_sb_getcksum(sbi->lfs)) {
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if (flags & VERBOSE)
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printf("LFS bad superblock at %" PRIu64 "\n",
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BLK_CNT);
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return;
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}
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/* backup offset */
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lastblk = BLK_CNT - (LFS_SBPAD / 512);
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/* increment counter */
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++sbaddr;
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if (flags & BLOCKS) {
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sbi->lfs_off = BLK_CNT - btodb(LFS_LABELPAD);
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lfs_printpart(sbi, BLOCKS, n);
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return;
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}
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switch (sbaddr) {
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/*
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* first superblock contains the right offset, but lfs_fsmnt is
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* empty... fortunately the next superblock address has it.
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*/
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case FIRST_SBLOCK_ADDRESS:
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/* copy partition offset */
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if ((daddr_t)sbi->lfs_off != lastblk)
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sbi->lfs_off = BLK_CNT - (LFS_LABELPAD / 512);
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break;
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case SECOND_SBLOCK_ADDRESS:
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/* copy the path of last mount */
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namesize = MIN(sizeof(sbi->lfs_path), MIN(
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sizeof(sbi->lfs->lfs_dlfs_u.u_32.dlfs_fsmnt),
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sizeof(sbi->lfs->lfs_dlfs_u.u_64.dlfs_fsmnt)));
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(void)memcpy(sbi->lfs_path, lfs_sb_getfsmnt(sbi->lfs),
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namesize);
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sbi->lfs_path[namesize - 1] = '\0';
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/* print now that we have the info */
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if (flags & LABELS)
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lfs_printpart(sbi, LABELS, n);
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else
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lfs_printpart(sbi, NADA, n);
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/* clear our struct */
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(void)memset(sbi, 0, sizeof(*sbi));
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break;
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case MAX_SBLOCK_ADDRESS:
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/*
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* reset the counter, this is the last superblock address,
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* the next one will be another partition maybe.
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*/
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sbaddr = 0;
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break;
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default:
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break;
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}
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}
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static int
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lfs_checkmagic(struct sblockinfo *sbinfo)
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{
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switch (sbinfo->lfs->lfs_dlfs_u.u_32.dlfs_magic) {
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case LFS_MAGIC:
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sbinfo->lfs->lfs_is64 = false;
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sbinfo->lfs->lfs_dobyteswap = false;
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return 1;
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case LFS_MAGIC_SWAPPED:
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sbinfo->lfs->lfs_is64 = false;
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sbinfo->lfs->lfs_dobyteswap = true;
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return 1;
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case LFS64_MAGIC:
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sbinfo->lfs->lfs_is64 = true;
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sbinfo->lfs->lfs_dobyteswap = false;
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return 1;
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case LFS64_MAGIC_SWAPPED:
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sbinfo->lfs->lfs_is64 = true;
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sbinfo->lfs->lfs_dobyteswap = true;
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return 1;
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default:
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return 0;
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}
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}
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static int
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scan_disk(int fd, daddr_t beg, daddr_t end, int fflags)
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{
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struct sblockinfo sbinfo;
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uint8_t buf[SBLOCKSIZE * SBCOUNT];
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int n;
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n = 0;
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lastblk = -1;
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/* clear our struct before using it */
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(void)memset(&sbinfo, 0, sizeof(sbinfo));
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if (fflags & LABELS)
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(void)printf(
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"# size offset fstype [fsize bsize cpg/sgs]\n");
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for (blk = beg; blk <= end; blk += SBPASS) {
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if (pread(fd, buf, sizeof(buf), blk * 512) == -1) {
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if (fflag && fd >= 0)
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(void)close(fd);
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err(1, "pread");
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}
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for (n = 0; n < (SBLOCKSIZE * SBCOUNT); n += 512) {
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sbinfo.ffs = (struct fs *)&buf[n];
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sbinfo.lfs = (struct lfs *)&buf[n];
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switch (ffs_checkver(&sbinfo)) {
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case FSTYPE_FFSV1:
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case FSTYPE_FFSV2:
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ffs_scan(&sbinfo, n);
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lastblk = BLK_CNT;
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(void)memcpy(sbinfo.ffs_path,
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sbinfo.ffs->fs_fsmnt, MAXMNTLEN);
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break;
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case FSTYPE_NONE:
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/* maybe LFS? */
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if (lfs_checkmagic(&sbinfo))
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lfs_scan(&sbinfo, n);
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break;
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default:
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break;
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}
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}
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}
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if (fflag && fd >= 0)
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(void)close(fd);
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return EXIT_SUCCESS;
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"Usage: %s [-blv] [-e end] [-F file] [-s start] "
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"device\n", getprogname());
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exit(EXIT_FAILURE);
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}
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int
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main(int argc, char **argv)
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{
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int ch, fd;
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const char *fpath;
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daddr_t end = -1, beg = 0;
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struct disklabel dl;
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fpath = NULL;
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setprogname(*argv);
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while ((ch = getopt(argc, argv, "be:F:ls:v")) != -1)
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switch(ch) {
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case 'b':
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flags |= BLOCKS;
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flags &= ~LABELS;
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break;
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case 'e':
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eflag = 1;
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end = atoi(optarg);
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break;
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case 'F':
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fflag = 1;
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fpath = optarg;
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break;
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case 'l':
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flags |= LABELS;
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flags &= ~BLOCKS;
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break;
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case 's':
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beg = atoi(optarg);
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break;
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case 'v':
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flags |= VERBOSE;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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argc -= optind;
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argv += optind;
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if (fflag) {
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struct stat stp;
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if (stat(fpath, &stp))
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err(1, "Cannot stat `%s'", fpath);
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if (!eflag)
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end = (uint64_t)stp.st_size;
|
|
|
|
(void)printf("Total file size: %" PRIu64 "\n\n",
|
|
(uint64_t)stp.st_size);
|
|
|
|
fd = open(fpath, O_RDONLY | O_DIRECT);
|
|
} else {
|
|
if (argc != 1)
|
|
usage();
|
|
|
|
fd = opendisk(argv[0], O_RDONLY, device, sizeof(device), 0);
|
|
|
|
if (ioctl(fd, DIOCGDINFO, &dl) == -1) {
|
|
warn("Couldn't retrieve disklabel");
|
|
(void)memset(&dl, 0, sizeof(dl));
|
|
dl.d_secperunit = 0x7fffffff;
|
|
} else {
|
|
(void)printf("Disk: %s\n", dl.d_typename);
|
|
(void)printf("Total sectors on disk: %" PRIu32 "\n\n",
|
|
dl.d_secperunit);
|
|
}
|
|
}
|
|
|
|
if (!eflag && !fflag)
|
|
end = dl.d_secperunit; /* default to max sectors */
|
|
|
|
if (fd == -1)
|
|
err(1, "Cannot open `%s'", device);
|
|
/* NOTREACHED */
|
|
|
|
return scan_disk(fd, beg, end, flags);
|
|
}
|