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freebsd/sbin/ffsinfo/ffsinfo.c

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/*
* Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz
* Copyright (c) 1980, 1989, 1993 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgment:
* This product includes software developed by the University of
* California, Berkeley and its contributors, as well as Christoph
* Herrmann and Thomas-Henning von Kamptz.
* 4. 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.
*
* $TSHeader: src/sbin/ffsinfo/ffsinfo.c,v 1.4 2000/12/12 19:30:55 tomsoft Exp $
*
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz\n\
Copyright (c) 1980, 1989, 1993 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
/* ********************************************************** INCLUDES ***** */
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/stat.h>
#include <stdio.h>
#include <paths.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "debug.h"
/* *********************************************************** GLOBALS ***** */
#ifdef FS_DEBUG
int _dbg_lvl_ = (DL_INFO); /* DL_TRC */
#endif /* FS_DEBUG */
static union {
struct fs fs;
char pad[SBSIZE];
} fsun1, fsun2;
#define sblock fsun1.fs
#define osblock fsun2.fs
static union {
struct cg cg;
char pad[MAXBSIZE];
} cgun1;
#define acg cgun1.cg
static char ablk[MAXBSIZE];
static char i1blk[MAXBSIZE];
static char i2blk[MAXBSIZE];
static char i3blk[MAXBSIZE];
static struct csum *fscs;
/* ******************************************************** PROTOTYPES ***** */
static void rdfs(daddr_t, size_t, void *, int);
static void usage(void);
static struct disklabel *get_disklabel(int);
static struct dinode *ginode(ino_t, int);
static void dump_whole_inode(ino_t, int, int);
/* ************************************************************** rdfs ***** */
/*
* Here we read some block(s) from disk.
*/
void
rdfs(daddr_t bno, size_t size, void *bf, int fsi)
{
DBG_FUNC("rdfs")
ssize_t n;
DBG_ENTER;
if (lseek(fsi, (off_t)bno * DEV_BSIZE, 0) < 0) {
err(33, "rdfs: seek error: %ld", (long)bno);
}
n = read(fsi, bf, size);
if (n != (ssize_t)size) {
err(34, "rdfs: read error: %ld", (long)bno);
}
DBG_LEAVE;
return;
}
/* ************************************************************** main ***** */
/*
* ffsinfo(8) is a tool to dump all metadata of a file system. It helps to find
* errors is the file system much easier. You can run ffsinfo before and after
* an fsck(8), and compare the two ascii dumps easy with diff, and you see
* directly where the problem is. You can control how much detail you want to
* see with some command line arguments. You can also easy check the status
* of a file system, like is there is enough space for growing a file system,
* or how many active snapshots do we have. It provides much more detailed
* information then dumpfs. Snapshots, as they are very new, are not really
* supported. They are just mentioned currently, but it is planned to run
* also over active snapshots, to even get that output.
*/
int
main(int argc, char **argv)
{
DBG_FUNC("main")
char *device, *special, *cp;
char ch;
size_t len;
struct stat st;
struct disklabel *lp;
struct partition *pp;
int fsi;
struct csum *dbg_csp;
int dbg_csc;
char dbg_line[80];
int cylno,i;
int cfg_cg, cfg_in, cfg_lv;
int cg_start, cg_stop;
ino_t in;
char *out_file;
int Lflag=0;
DBG_ENTER;
cfg_lv=0xff;
cfg_in=-2;
cfg_cg=-2;
out_file=strdup("/var/tmp/ffsinfo");
if(out_file == NULL) {
errx(1, "strdup failed");
}
while ((ch=getopt(argc, argv, "Lg:i:l:o:")) != -1) {
switch(ch) {
case 'L':
Lflag=1;
break;
case 'g':
cfg_cg=atol(optarg);
if(cfg_cg < -1) {
usage();
}
break;
case 'i':
cfg_in=atol(optarg);
if(cfg_in < 0) {
usage();
}
break;
case 'l':
cfg_lv=atol(optarg);
if(cfg_lv < 0x1||cfg_lv > 0x3ff) {
usage();
}
break;
case 'o':
free(out_file);
out_file=strdup(optarg);
if(out_file == NULL) {
errx(1, "strdup failed");
}
break;
case '?':
/* FALLTHROUGH */
default:
usage();
}
}
argc -= optind;
argv += optind;
if(argc != 1) {
usage();
}
device=*argv;
/*
* Now we try to guess the (raw)device name.
*/
if (0 == strrchr(device, '/') && (stat(device, &st) == -1)) {
/*
* No path prefix was given, so try in that order:
* /dev/r%s
* /dev/%s
* /dev/vinum/r%s
* /dev/vinum/%s.
*
* FreeBSD now doesn't distinguish between raw and block
* devices any longer, but it should still work this way.
*/
len=strlen(device)+strlen(_PATH_DEV)+2+strlen("vinum/");
special=(char *)malloc(len);
if(special == NULL) {
errx(1, "malloc failed");
}
snprintf(special, len, "%sr%s", _PATH_DEV, device);
if (stat(special, &st) == -1) {
snprintf(special, len, "%s%s", _PATH_DEV, device);
if (stat(special, &st) == -1) {
snprintf(special, len, "%svinum/r%s",
_PATH_DEV, device);
if (stat(special, &st) == -1) {
/*
* For now this is the 'last resort'.
*/
snprintf(special, len, "%svinum/%s",
_PATH_DEV, device);
}
}
}
device = special;
}
/*
* Open our device for reading.
*/
fsi = open(device, O_RDONLY);
if (fsi < 0) {
err(1, "%s", device);
}
stat(device, &st);
if(S_ISREG(st.st_mode)) { /* label check not supported for files */
Lflag=1;
}
if(!Lflag) {
/*
* Try to read a label and gess the slice if not specified.
* This code should guess the right thing and avaid to bother
* the user user with the task of specifying the option -v on
* vinum volumes.
*/
cp=device+strlen(device)-1;
lp = get_disklabel(fsi);
if(lp->d_type == DTYPE_VINUM) {
pp = &lp->d_partitions[0];
} else if (isdigit(*cp)) {
pp = &lp->d_partitions[2];
} else if (*cp>='a' && *cp<='h') {
pp = &lp->d_partitions[*cp - 'a'];
} else {
errx(1, "unknown device");
}
/*
* Check if that partition looks suited for dumping.
*/
if (pp->p_size < 1) {
errx(1, "partition is unavailable");
}
if (pp->p_fstype != FS_BSDFFS) {
errx(1, "partition not 4.2BSD");
}
}
/*
* Read the current superblock.
*/
rdfs((daddr_t)(SBOFF/DEV_BSIZE), (size_t)SBSIZE, (void *)&sblock, fsi);
if (sblock.fs_magic != FS_MAGIC) {
errx(1, "superblock not recognized");
}
DBG_OPEN(out_file); /* already here we need a superblock */
if(cfg_lv & 0x001) {
DBG_DUMP_FS(&sblock,
"primary sblock");
}
/*
* Determine here what cylinder groups to dump.
*/
if(cfg_cg==-2) {
cg_start=0;
cg_stop=sblock.fs_ncg;
} else if (cfg_cg==-1) {
cg_start=sblock.fs_ncg-1;
cg_stop=sblock.fs_ncg;
} else if (cfg_cg<sblock.fs_ncg) {
cg_start=cfg_cg;
cg_stop=cfg_cg+1;
} else {
cg_start=sblock.fs_ncg;
cg_stop=sblock.fs_ncg;
}
if (cfg_lv & 0x004) {
fscs = (struct csum *)calloc((size_t)1,
(size_t)sblock.fs_cssize);
if(fscs == NULL) {
errx(1, "calloc failed");
}
/*
* Get the cylinder summary into the memory ...
*/
for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) {
rdfs(fsbtodb(&sblock, sblock.fs_csaddr +
numfrags(&sblock, i)), (size_t)(sblock.fs_cssize-i<
sblock.fs_bsize ? sblock.fs_cssize - i :
sblock.fs_bsize), (void *)(((char *)fscs)+i), fsi);
}
dbg_csp=fscs;
/*
* ... and dump it.
*/
for(dbg_csc=0; dbg_csc<sblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. csum in fscs", dbg_csc);
DBG_DUMP_CSUM(&sblock,
dbg_line,
dbg_csp++);
}
}
/*
* For each requested cylinder group ...
*/
for(cylno=cg_start; cylno<cg_stop; cylno++) {
snprintf(dbg_line, sizeof(dbg_line), "cgr %d", cylno);
if(cfg_lv & 0x002) {
/*
* ... dump the superblock copies ...
*/
rdfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)),
(size_t)SBSIZE, (void *)&osblock, fsi);
DBG_DUMP_FS(&osblock,
dbg_line);
}
/*
* ... read the cylinder group and dump whatever was requested.
*/
rdfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
(size_t)sblock.fs_cgsize, (void *)&acg, fsi);
if(cfg_lv & 0x008) {
DBG_DUMP_CG(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x010) {
DBG_DUMP_INMAP(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x020) {
DBG_DUMP_FRMAP(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x040) {
DBG_DUMP_CLMAP(&sblock,
dbg_line,
&acg);
DBG_DUMP_CLSUM(&sblock,
dbg_line,
&acg);
}
if(cfg_lv & 0x080) {
DBG_DUMP_SPTBL(&sblock,
dbg_line,
&acg);
}
}
/*
* Dump the requested inode(s).
*/
if(cfg_in != -2) {
dump_whole_inode((ino_t)cfg_in, fsi, cfg_lv);
} else {
for(in=cg_start*sblock.fs_ipg; in<(ino_t)cg_stop*sblock.fs_ipg;
in++) {
dump_whole_inode(in, fsi, cfg_lv);
}
}
DBG_CLOSE;
close(fsi);
DBG_LEAVE;
return 0;
}
/* ************************************************** dump_whole_inode ***** */
/*
* Here we dump a list of all blocks allocated by this inode. We follow
* all indirect blocks.
*/
void
dump_whole_inode(ino_t inode, int fsi, int level)
{
DBG_FUNC("dump_whole_inode")
struct dinode *ino;
int rb;
unsigned int ind2ctr, ind3ctr;
ufs_daddr_t *ind2ptr, *ind3ptr;
char comment[80];
DBG_ENTER;
/*
* Read the inode from disk/cache.
*/
ino=ginode(inode, fsi);
if(ino->di_nlink==0) {
DBG_LEAVE;
return; /* inode not in use */
}
/*
* Dump the main inode structure.
*/
snprintf(comment, sizeof(comment), "Inode 0x%08x", inode);
if (level & 0x100) {
DBG_DUMP_INO(&sblock,
comment,
ino);
}
if (!(level & 0x200)) {
DBG_LEAVE;
return;
}
/*
* Ok, now prepare for dumping all direct and indirect pointers.
*/
rb=howmany(ino->di_size, sblock.fs_bsize)-NDADDR;
if(rb>0) {
/*
* Dump single indirect block.
*/
rdfs(fsbtodb(&sblock, ino->di_ib[0]), (size_t)sblock.fs_bsize,
(void *)&i1blk, fsi);
snprintf(comment, sizeof(comment), "Inode 0x%08x: indirect 0",
inode);
DBG_DUMP_IBLK(&sblock,
comment,
i1blk,
(size_t)rb);
rb-=howmany(sblock.fs_bsize, sizeof(ufs_daddr_t));
}
if(rb>0) {
/*
* Dump double indirect blocks.
*/
rdfs(fsbtodb(&sblock, ino->di_ib[1]), (size_t)sblock.fs_bsize,
(void *)&i2blk, fsi);
snprintf(comment, sizeof(comment), "Inode 0x%08x: indirect 1",
inode);
DBG_DUMP_IBLK(&sblock,
comment,
i2blk,
howmany(rb, howmany(sblock.fs_bsize, sizeof(ufs_daddr_t))));
for(ind2ctr=0; ((ind2ctr < howmany(sblock.fs_bsize,
sizeof(ufs_daddr_t)))&&(rb>0)); ind2ctr++) {
ind2ptr=&((ufs_daddr_t *)(void *)&i2blk)[ind2ctr];
rdfs(fsbtodb(&sblock, *ind2ptr),
(size_t)sblock.fs_bsize, (void *)&i1blk, fsi);
snprintf(comment, sizeof(comment),
"Inode 0x%08x: indirect 1->%d", inode, ind2ctr);
DBG_DUMP_IBLK(&sblock,
comment,
i1blk,
(size_t)rb);
rb-=howmany(sblock.fs_bsize, sizeof(ufs_daddr_t));
}
}
if(rb>0) {
/*
* Dump triple indirect blocks.
*/
rdfs(fsbtodb(&sblock, ino->di_ib[2]), (size_t)sblock.fs_bsize,
(void *)&i3blk, fsi);
snprintf(comment, sizeof(comment), "Inode 0x%08x: indirect 2",
inode);
#define SQUARE(a) ((a)*(a))
DBG_DUMP_IBLK(&sblock,
comment,
i3blk,
howmany(rb,
SQUARE(howmany(sblock.fs_bsize, sizeof(ufs_daddr_t)))));
#undef SQUARE
for(ind3ctr=0; ((ind3ctr < howmany(sblock.fs_bsize,
sizeof(ufs_daddr_t)))&&(rb>0)); ind3ctr ++) {
ind3ptr=&((ufs_daddr_t *)(void *)&i3blk)[ind3ctr];
rdfs(fsbtodb(&sblock, *ind3ptr),
(size_t)sblock.fs_bsize, (void *)&i2blk, fsi);
snprintf(comment, sizeof(comment),
"Inode 0x%08x: indirect 2->%d", inode, ind3ctr);
DBG_DUMP_IBLK(&sblock,
comment,
i2blk,
howmany(rb,
howmany(sblock.fs_bsize, sizeof(ufs_daddr_t))));
for(ind2ctr=0; ((ind2ctr < howmany(sblock.fs_bsize,
sizeof(ufs_daddr_t)))&&(rb>0)); ind2ctr ++) {
ind2ptr=&((ufs_daddr_t *)(void *)&i2blk)
[ind2ctr];
rdfs(fsbtodb(&sblock, *ind2ptr),
(size_t)sblock.fs_bsize, (void *)&i1blk,
fsi);
snprintf(comment, sizeof(comment),
"Inode 0x%08x: indirect 2->%d->%d", inode,
ind3ctr, ind3ctr);
DBG_DUMP_IBLK(&sblock,
comment,
i1blk,
(size_t)rb);
rb-=howmany(sblock.fs_bsize,
sizeof(ufs_daddr_t));
}
}
}
DBG_LEAVE;
return;
}
/* ***************************************************** get_disklabel ***** */
/*
* Read the disklabel from disk.
*/
struct disklabel *
get_disklabel(int fd)
{
DBG_FUNC("get_disklabel")
static struct disklabel *lab;
DBG_ENTER;
lab=(struct disklabel *)malloc(sizeof(struct disklabel));
if (!lab) {
errx(1, "malloc failed");
}
if (ioctl(fd, DIOCGDINFO, (char *)lab) < 0) {
errx(1, "DIOCGDINFO failed");
exit(-1);
}
DBG_LEAVE;
return (lab);
}
/* ************************************************************* usage ***** */
/*
* Dump a line of usage.
*/
void
usage(void)
{
DBG_FUNC("usage")
DBG_ENTER;
fprintf(stderr,
"usage: ffsinfo [-L] [-g cylgrp] [-i inode] [-l level] "
"[-o outfile]\n"
" special | file\n");
DBG_LEAVE;
exit(1);
}
/* ************************************************************ ginode ***** */
/*
* This function provides access to an individual inode. We find out in which
* block the requested inode is located, read it from disk if needed, and
* return the pointer into that block. We maintain a cache of one block to
* not read the same block again and again if we iterate linearly over all
* inodes.
*/
struct dinode *
ginode(ino_t inumber, int fsi)
{
DBG_FUNC("ginode")
ufs_daddr_t iblk;
static ino_t startinum=0; /* first inode in cached block */
struct dinode *pi;
DBG_ENTER;
pi=(struct dinode *)(void *)ablk;
if (startinum == 0 || inumber < startinum ||
inumber >= startinum + INOPB(&sblock)) {
/*
* The block needed is not cached, so we have to read it from
* disk now.
*/
iblk = ino_to_fsba(&sblock, inumber);
rdfs(fsbtodb(&sblock, iblk), (size_t)sblock.fs_bsize,
(void *)&ablk, fsi);
startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
}
DBG_LEAVE;
return (&(pi[inumber % INOPB(&sblock)]));
}
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