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