NetBSD-5.0.2/sbin/scan_ffs/scan_ffs.c
/* $NetBSD: scan_ffs.c,v 1.20 2007/12/15 19:44:47 perry Exp $ */
/*
* Copyright (c) 2005-2007 Juan Romero Pardines
* Copyright (c) 1998 Niklas Hallqvist, Tobias Weingartner
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Currently it can detect FFS and LFS partitions (version 1 or 2)
* up to 8192/65536 fragsize/blocksize.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: scan_ffs.c,v 1.20 2007/12/15 19:44:47 perry Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/dkio.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/mount.h>
#include <ufs/ufs/dinode.h>
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_extern.h>
/* Undefine macros defined by both lfs/lfs.h and ffs/fs.h */
#undef fsbtodb
#undef dbtofsb
#undef blkoff
#undef fragoff
#undef lblktosize
#undef lblkno
#undef numfrags
#undef blkroundup
#undef fragroundup
#undef fragstoblks
#undef blkstofrags
#undef fragnum
#undef blknum
#undef blksize
#undef INOPB
#undef INOPF
#undef NINDIR
#include <ufs/ffs/fs.h>
/* Undefine macros defined by both lfs/lfs.h and ffs/fs.h */
/* ...to make sure we don't later depend on their (ambigious) definition */
#undef fsbtodb
#undef dbtofsb
#undef blkoff
#undef fragoff
#undef lblktosize
#undef lblkno
#undef numfrags
#undef blkroundup
#undef fragroundup
#undef fragstoblks
#undef blkstofrags
#undef fragnum
#undef blknum
#undef blksize
#undef INOPB
#undef INOPF
#undef NINDIR
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <err.h>
#include <util.h>
#define BLK_CNT (blk + (n / 512))
/* common struct for FFS/LFS */
struct sblockinfo {
struct lfs *lfs;
struct fs *ffs;
uint64_t lfs_off;
uint64_t ffs_off;
char lfs_path[MAXMNTLEN];
char ffs_path[MAXMNTLEN];
};
static daddr_t blk, lastblk;
static int eflag = 0;
static int fflag = 0;
static int flags = 0;
static int sbaddr = 0; /* counter for the LFS superblocks */
static char device[MAXPATHLEN];
static const char *fstypes[] = { "NONE", "FFSv1", "FFSv2" };
#define FSTYPE_NONE 0
#define FSTYPE_FFSV1 1
#define FSTYPE_FFSV2 2
#define SBCOUNT 128 /* may be changed */
#define SBPASS (SBCOUNT * SBLOCKSIZE / 512)
/* This is only useful for LFS */
/* first sblock address contains the correct offset */
#define FIRST_SBLOCK_ADDRESS 1
/* second and third sblock address contain lfs_fsmnt[MAXMNTLEN] */
#define SECOND_SBLOCK_ADDRESS 2
/* last sblock address in a LFS partition */
#define MAX_SBLOCK_ADDRESS 10
enum { NADA=0, VERBOSE=1, LABELS=2, BLOCKS=4 };
/* FFS functions */
static void ffs_printpart(struct sblockinfo *, int, size_t, int);
static void ffs_scan(struct sblockinfo *, int);
static int ffs_checkver(struct sblockinfo *);
/* LFS functions */
static void lfs_printpart(struct sblockinfo *, int, int);
static void lfs_scan(struct sblockinfo *, int);
/* common functions */
static void usage(void) __dead;
static int scan_disk(int, daddr_t, daddr_t, int);
static int
ffs_checkver(struct sblockinfo *sbi)
{
switch (sbi->ffs->fs_magic) {
case FS_UFS1_MAGIC:
case FS_UFS1_MAGIC_SWAPPED:
sbi->ffs->fs_size = sbi->ffs->fs_old_size;
return FSTYPE_FFSV1;
case FS_UFS2_MAGIC:
case FS_UFS2_MAGIC_SWAPPED:
return FSTYPE_FFSV2;
default:
return FSTYPE_NONE;
}
}
static void
ffs_printpart(struct sblockinfo *sbi, int flag, size_t ffsize, int n)
{
int offset, ver;
switch (flag) {
case VERBOSE:
switch (ffs_checkver(sbi)) {
case FSTYPE_FFSV1:
(void)printf("offset: %" PRIu64 " n: %d "
"id: %x,%x size: %" PRIu64 "\n",
BLK_CNT - (2 * SBLOCKSIZE / 512), n,
sbi->ffs->fs_id[0], sbi->ffs->fs_id[1],
(uint64_t)sbi->ffs->fs_size *
sbi->ffs->fs_fsize / 512);
break;
case FSTYPE_FFSV2:
(void)printf("offset: %" PRIu64 " n: %d "
"id: %x,%x size: %" PRIu64 "\n",
BLK_CNT - (ffsize * SBLOCKSIZE / 512+128),
n, sbi->ffs->fs_id[0], sbi->ffs->fs_id[1],
(uint64_t)sbi->ffs->fs_size *
sbi->ffs->fs_fsize / 512);
break;
default:
break;
}
break;
case LABELS:
(void)printf("X: %9" PRIu64,
(uint64_t)(sbi->ffs->fs_size *
sbi->ffs->fs_fsize / 512));
switch (ffs_checkver(sbi)) {
case FSTYPE_FFSV1:
(void)printf(" %9" PRIu64,
BLK_CNT - (ffsize * SBLOCKSIZE / 512));
break;
case FSTYPE_FFSV2:
(void)printf(" %9" PRIu64,
BLK_CNT - (ffsize * SBLOCKSIZE / 512 + 128));
break;
default:
break;
}
(void)printf(" 4.2BSD %6d %5d %7d # %s [%s]\n",
sbi->ffs->fs_fsize, sbi->ffs->fs_bsize,
sbi->ffs->fs_old_cpg,
sbi->ffs_path, fstypes[ffs_checkver(sbi)]);
break;
case BLOCKS:
default:
(void)printf("%s ", fstypes[ffs_checkver(sbi)]);
ver = ffs_checkver(sbi);
if (ver == FSTYPE_NONE)
break;
offset = 0;
if (flag == BLOCKS)
(void)printf("sb ");
else if (ver == FSTYPE_FFSV1)
offset = (2 * SBLOCKSIZE / 512);
else if (ver == FSTYPE_FFSV2)
offset = (ffsize * SBLOCKSIZE / 512 + 128);
(void)printf("at %" PRIu64, BLK_CNT - offset);
(void)printf(" size %" PRIu64 ", last mounted on %s\n",
(uint64_t)(sbi->ffs->fs_size *
sbi->ffs->fs_fsize / 512), sbi->ffs_path);
break;
}
}
static void
ffs_scan(struct sblockinfo *sbi, int n)
{
size_t i = 0;
if (flags & BLOCKS) {
ffs_printpart(sbi, BLOCKS, 0, n);
return;
}
if (flags & VERBOSE)
ffs_printpart(sbi, VERBOSE, NADA, n);
switch (ffs_checkver(sbi)) {
case FSTYPE_FFSV1:
/* fsize/bsize > 512/4096 and < 4096/32768. */
if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 512)) {
i = 2;
/* fsize/bsize 4096/32768. */
} else if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 170)) {
i = 4;
/* fsize/bsize 8192/65536 */
} else if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 73)) {
i = 8;
} else
break;
if (flags & LABELS)
ffs_printpart(sbi, LABELS, i, n);
else
ffs_printpart(sbi, NADA, i, n);
break;
case FSTYPE_FFSV2:
/*
* That checks for FFSv2 partitions with fragsize/blocksize:
* 512/4096, 1024/8192, 2048/16384, 4096/32768 and 8192/65536.
* Really enough for now.
*/
for (i = 1; i < 16; i <<= 1)
if ((BLK_CNT - lastblk) == (i * SBLOCKSIZE / 512)) {
if (flags & LABELS)
ffs_printpart(sbi, LABELS, i, n);
else
ffs_printpart(sbi, NADA, i, n);
}
break;
}
}
static void
lfs_printpart(struct sblockinfo *sbi, int flag, int n)
{
if (flags & VERBOSE)
(void)printf("offset: %" PRIu64 " size %" PRIu32
" fsid %" PRIx32 "\n", sbi->lfs_off, sbi->lfs->lfs_size,
sbi->lfs->lfs_ident);
switch (flag) {
case LABELS:
(void)printf("X: %9" PRIu64,
(uint64_t)(sbi->lfs->lfs_size *
sbi->lfs->lfs_fsize / 512));
(void)printf(" %9" PRIu64, sbi->lfs_off);
(void)printf(" 4.4LFS %6d %5d %7d # %s [LFSv%d]\n",
sbi->lfs->lfs_fsize, sbi->lfs->lfs_bsize,
sbi->lfs->lfs_nseg, sbi->lfs_path,
sbi->lfs->lfs_version);
break;
case BLOCKS:
(void)printf("LFSv%d", sbi->lfs->lfs_version);
(void)printf(" sb at %" PRIu64, sbi->lfs_off + btodb(LFS_LABELPAD));
(void)printf(" fsid %" PRIx32, sbi->lfs->lfs_ident);
(void)printf(" size %" PRIu64 ", last mounted on %s\n",
(uint64_t)(sbi->lfs->lfs_size *
sbi->lfs->lfs_fsize / 512), sbi->lfs_path);
break;
default:
(void)printf("LFSv%d ", sbi->lfs->lfs_version);
(void)printf("at %" PRIu64, sbi->lfs_off);
(void)printf(" size %" PRIu64 ", last mounted on %s\n",
(uint64_t)(sbi->lfs->lfs_size *
sbi->lfs->lfs_fsize / 512), sbi->lfs_path);
break;
}
}
static void
lfs_scan(struct sblockinfo *sbi, int n)
{
/* Check to see if the sb checksums correctly */
if (lfs_sb_cksum(&(sbi->lfs->lfs_dlfs)) != sbi->lfs->lfs_cksum) {
if (flags & VERBOSE)
printf("LFS bad superblock at %" PRIu64 "\n",
BLK_CNT);
return;
}
/* backup offset */
lastblk = BLK_CNT - (LFS_SBPAD / 512);
/* increment counter */
++sbaddr;
if (flags & BLOCKS) {
sbi->lfs_off = BLK_CNT - btodb(LFS_LABELPAD);
lfs_printpart(sbi, BLOCKS, n);
return;
}
switch (sbaddr) {
/*
* first superblock contains the right offset, but lfs_fsmnt is
* empty... fortunately the next superblock address has it.
*/
case FIRST_SBLOCK_ADDRESS:
/* copy partition offset */
if (sbi->lfs_off != lastblk)
sbi->lfs_off = BLK_CNT - (LFS_LABELPAD / 512);
break;
case SECOND_SBLOCK_ADDRESS:
/* copy the path of last mount */
(void)memcpy(sbi->lfs_path, sbi->lfs->lfs_fsmnt, MAXMNTLEN);
/* print now that we have the info */
if (flags & LABELS)
lfs_printpart(sbi, LABELS, n);
else
lfs_printpart(sbi, NADA, n);
/* clear our struct */
(void)memset(sbi, 0, sizeof(*sbi));
break;
case MAX_SBLOCK_ADDRESS:
/*
* reset the counter, this is the last superblock address,
* the next one will be another partition maybe.
*/
sbaddr = 0;
break;
default:
break;
}
}
static int
scan_disk(int fd, daddr_t beg, daddr_t end, int fflags)
{
struct sblockinfo sbinfo;
uint8_t buf[SBLOCKSIZE * SBCOUNT];
int n;
n = 0;
lastblk = -1;
/* clear our struct before using it */
(void)memset(&sbinfo, 0, sizeof(sbinfo));
if (fflags & LABELS)
(void)printf(
"# size offset fstype [fsize bsize cpg/sgs]\n");
for (blk = beg; blk <= end; blk += SBPASS) {
if (pread(fd, buf, sizeof(buf), blk * 512) == -1) {
if (fflag && fd >= 0)
(void)close(fd);
err(1, "pread");
}
for (n = 0; n < (SBLOCKSIZE * SBCOUNT); n += 512) {
sbinfo.ffs = (struct fs *)&buf[n];
sbinfo.lfs = (struct lfs *)&buf[n];
switch (ffs_checkver(&sbinfo)) {
case FSTYPE_FFSV1:
case FSTYPE_FFSV2:
ffs_scan(&sbinfo, n);
lastblk = BLK_CNT;
(void)memcpy(sbinfo.ffs_path,
sbinfo.ffs->fs_fsmnt, MAXMNTLEN);
break;
case FSTYPE_NONE:
/* maybe LFS? */
if (sbinfo.lfs->lfs_magic == LFS_MAGIC)
lfs_scan(&sbinfo, n);
break;
default:
break;
}
}
}
if (fflag && fd >= 0)
(void)close(fd);
return EXIT_SUCCESS;
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [-blv] [-e end] [-F file] [-s start] "
"device\n", getprogname());
exit(EXIT_FAILURE);
}
int
main(int argc, char **argv)
{
int ch, fd;
const char *fpath;
daddr_t end = -1, beg = 0;
struct disklabel dl;
fpath = NULL;
setprogname(*argv);
while ((ch = getopt(argc, argv, "be:F:ls:v")) != -1)
switch(ch) {
case 'b':
flags |= BLOCKS;
flags &= ~LABELS;
break;
case 'e':
eflag = 1;
end = atoi(optarg);
break;
case 'F':
fflag = 1;
fpath = optarg;
break;
case 'l':
flags |= LABELS;
flags &= ~BLOCKS;
break;
case 's':
beg = atoi(optarg);
break;
case 'v':
flags |= VERBOSE;
break;
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
if (fflag) {
struct stat stp;
if (stat(fpath, &stp))
err(1, "Cannot stat `%s'", fpath);
if (!eflag)
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);
}