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freebsd-dev/sbin/dumpfs/dumpfs.c
Kirk McKusick b21582ee03 Add a flags parameter to the ffs_sbget() function that reads UFS superblocks. 
Rather than trying to shoehorn flags into the requested superblock
address, create a separate flags parameter to the ffs_sbget()
function in sys/ufs/ffs/ffs_subr.c. The ffs_sbget() function is
used both in the kernel and in user-level utilities through export
to the sbget() function in the libufs(3) library (see sbget(3)
for details). The kernel uses ffs_sbget() when mounting UFS
filesystems, in the glabel(8) and gjournal(8) GEOM utilities,
and in the standalone library used when booting the system
from a UFS root filesystem.

The ffs_sbget() function reads the superblock located at the byte
offset specified by its sblockloc parameter. The value UFS_STDSB
may be specified for sblockloc to request that the standard
location for the superblock be read.

The two existing options are now flags:

UFS_NOHASHFAIL will note if the check hash is wrong but will still
   return the superblock. This is used by the bootstrap code to
   give the system a chance to come up so that fsck can be run to
   correct the problem.

UFS_NOMSG indicates that superblock inconsistency error messages
   should not be printed. It is used by programs like fsck that
   want to print their own error message and programs like glabel(8)
   that just want to know if a UFS filesystem exists on a partition.

One additional flag is added:

UFS_NOCSUM causes only the superblock itself to be returned, but does
   not read in any auxiliary data structures like the cylinder group
   summary information. It is used by clients like glabel(8) that
   just want to check for possible filesystem types. Using UFS_NOCSUM
   skips the superblock checks for csum data which allows superblocks
   that have corrupted csum data to be read and used.

The validate_sblock() function checks that the superblock has not
been corrupted in a way that can crash or hang the system. Unless
the UFS_NOMSG flag is specified, it will print out any errors that
it finds. Prior to this commit, validate_sblock() returned as soon
as it found an inconsistency so would print at most one message.
It now does all its checks so when UFS_NOMSG has not been specified
will print out everything that it finds inconsistent.

Sponsored by: The FreeBSD Foundation
2022-07-30 22:51:38 -07:00

542 lines
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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2009 Robert N. M. Watson
* All rights reserved.
*
* This software was developed at the University of Cambridge Computer
* Laboratory with support from a grant from Google, Inc.
*
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Marshall
* Kirk McKusick and Network Associates Laboratories, the Security
* Research Division of Network Associates, Inc. under DARPA/SPAWAR
* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
* research program.
*
* Copyright (c) 1983, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1992, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)dumpfs.c 8.5 (Berkeley) 4/29/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/disklabel.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fstab.h>
#include <libufs.h>
#include <paths.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define afs disk.d_fs
#define acg disk.d_cg
static struct uufsd disk;
static int dumpfs(const char *, int);
static int dumpfsid(void);
static int dumpcg(void);
static int dumpfreespace(const char *, int);
static void dumpfreespacecg(int);
static int marshal(const char *);
static void pbits(void *, int);
static void pblklist(void *, int, off_t, int);
static void ufserr(const char *);
static void usage(void) __dead2;
int
main(int argc, char *argv[])
{
const char *name;
int ch, dofreespace, domarshal, dolabel, dosb, eval;
dofreespace = domarshal = dolabel = dosb = eval = 0;
while ((ch = getopt(argc, argv, "lfms")) != -1) {
switch (ch) {
case 'f':
dofreespace++;
break;
case 'm':
domarshal = 1;
break;
case 'l':
dolabel = 1;
break;
case 's':
dosb = 1;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
if (dofreespace && domarshal)
usage();
if (dofreespace > 2)
usage();
while ((name = *argv++) != NULL) {
if (ufs_disk_fillout_blank(&disk, name) == -1) {
ufserr(name);
eval |= 1;
continue;
}
disk.d_lookupflags |= UFS_NOHASHFAIL;
if (sbread(&disk) == -1) {
ufserr(name);
eval |= 1;
continue;
}
if (dofreespace)
eval |= dumpfreespace(name, dofreespace);
else if (domarshal)
eval |= marshal(name);
else if (dolabel)
eval |= dumpfsid();
else
eval |= dumpfs(name, dosb);
ufs_disk_close(&disk);
}
exit(eval);
}
static int
dumpfsid(void)
{
printf("%sufsid/%08x%08x\n", _PATH_DEV, afs.fs_id[0], afs.fs_id[1]);
return 0;
}
static int
dumpfs(const char *name, int dosb)
{
time_t fstime, fsmtime;
int64_t fssize;
int32_t fsflags;
int i;
switch (disk.d_ufs) {
case 2:
fssize = afs.fs_size;
fstime = afs.fs_time;
fsmtime = afs.fs_mtime;
printf("magic\t%x (UFS2)\n", afs.fs_magic);
printf("last mounted time\t%s", ctime(&fsmtime));
printf("last modified time\t%s", ctime(&fstime));
printf("superblock location\t%jd\tid\t[ %08x %08x ]\n",
(intmax_t)afs.fs_sblockloc, afs.fs_id[0], afs.fs_id[1]);
printf("ncg\t%d\tsize\t%jd\tblocks\t%jd\n",
afs.fs_ncg, (intmax_t)fssize, (intmax_t)afs.fs_dsize);
break;
case 1:
fssize = afs.fs_old_size;
fstime = afs.fs_old_time;
printf("magic\t%x (UFS1)\ttime\t%s",
afs.fs_magic, ctime(&fstime));
printf("id\t[ %08x %08x ]\n", afs.fs_id[0], afs.fs_id[1]);
printf("ncg\t%d\tsize\t%jd\tblocks\t%jd\n",
afs.fs_ncg, (intmax_t)fssize, (intmax_t)afs.fs_dsize);
break;
default:
goto err;
}
printf("bsize\t%d\tshift\t%d\tmask\t0x%08x\n",
afs.fs_bsize, afs.fs_bshift, afs.fs_bmask);
printf("fsize\t%d\tshift\t%d\tmask\t0x%08x\n",
afs.fs_fsize, afs.fs_fshift, afs.fs_fmask);
printf("frag\t%d\tshift\t%d\tfsbtodb\t%d\n",
afs.fs_frag, afs.fs_fragshift, afs.fs_fsbtodb);
printf("minfree\t%d%%\toptim\t%s\tsymlinklen %d\n",
afs.fs_minfree, afs.fs_optim == FS_OPTSPACE ? "space" : "time",
afs.fs_maxsymlinklen);
switch (disk.d_ufs) {
case 2:
printf("%s %d\tmaxbpg\t%d\tmaxcontig %d\tcontigsumsize %d\n",
"maxbsize", afs.fs_maxbsize, afs.fs_maxbpg,
afs.fs_maxcontig, afs.fs_contigsumsize);
printf("nbfree\t%jd\tndir\t%jd\tnifree\t%jd\tnffree\t%jd\n",
(intmax_t)afs.fs_cstotal.cs_nbfree,
(intmax_t)afs.fs_cstotal.cs_ndir,
(intmax_t)afs.fs_cstotal.cs_nifree,
(intmax_t)afs.fs_cstotal.cs_nffree);
printf("bpg\t%d\tfpg\t%d\tipg\t%d\tunrefs\t%jd\n",
afs.fs_fpg / afs.fs_frag, afs.fs_fpg, afs.fs_ipg,
(intmax_t)afs.fs_unrefs);
printf("nindir\t%d\tinopb\t%d\tmaxfilesize\t%ju\n",
afs.fs_nindir, afs.fs_inopb,
(uintmax_t)afs.fs_maxfilesize);
printf("sbsize\t%d\tcgsize\t%d\tcsaddr\t%jd\tcssize\t%d\n",
afs.fs_sbsize, afs.fs_cgsize, (intmax_t)afs.fs_csaddr,
afs.fs_cssize);
break;
case 1:
printf("maxbpg\t%d\tmaxcontig %d\tcontigsumsize %d\n",
afs.fs_maxbpg, afs.fs_maxcontig, afs.fs_contigsumsize);
printf("nbfree\t%d\tndir\t%d\tnifree\t%d\tnffree\t%d\n",
afs.fs_old_cstotal.cs_nbfree, afs.fs_old_cstotal.cs_ndir,
afs.fs_old_cstotal.cs_nifree, afs.fs_old_cstotal.cs_nffree);
printf("cpg\t%d\tbpg\t%d\tfpg\t%d\tipg\t%d\n",
afs.fs_old_cpg, afs.fs_fpg / afs.fs_frag, afs.fs_fpg,
afs.fs_ipg);
printf("nindir\t%d\tinopb\t%d\tnspf\t%d\tmaxfilesize\t%ju\n",
afs.fs_nindir, afs.fs_inopb, afs.fs_old_nspf,
(uintmax_t)afs.fs_maxfilesize);
printf("sbsize\t%d\tcgsize\t%d\tcgoffset %d\tcgmask\t0x%08x\n",
afs.fs_sbsize, afs.fs_cgsize, afs.fs_old_cgoffset,
afs.fs_old_cgmask);
printf("csaddr\t%jd\tcssize\t%d\n",
(intmax_t)afs.fs_csaddr, afs.fs_cssize);
printf("rotdelay %dms\trps\t%d\ttrackskew %d\tinterleave %d\n",
afs.fs_old_rotdelay, afs.fs_old_rps, afs.fs_old_trackskew,
afs.fs_old_interleave);
printf("nsect\t%d\tnpsect\t%d\tspc\t%d\n",
afs.fs_old_nsect, afs.fs_old_npsect, afs.fs_old_spc);
break;
default:
goto err;
}
printf("sblkno\t%d\tcblkno\t%d\tiblkno\t%d\tdblkno\t%d\n",
afs.fs_sblkno, afs.fs_cblkno, afs.fs_iblkno, afs.fs_dblkno);
printf("cgrotor\t%d\tfmod\t%d\tronly\t%d\tclean\t%d\n",
afs.fs_cgrotor, afs.fs_fmod, afs.fs_ronly, afs.fs_clean);
printf("metaspace %jd\tavgfpdir %d\tavgfilesize %d\n",
afs.fs_metaspace, afs.fs_avgfpdir, afs.fs_avgfilesize);
printf("flags\t");
if (afs.fs_old_flags & FS_FLAGS_UPDATED)
fsflags = afs.fs_flags;
else
fsflags = afs.fs_old_flags;
if (fsflags == 0)
printf("none");
if (fsflags & FS_UNCLEAN)
printf("unclean ");
if (fsflags & FS_DOSOFTDEP)
printf("soft-updates%s ", (fsflags & FS_SUJ) ? "+journal" : "");
if (fsflags & FS_NEEDSFSCK)
printf("needs-fsck-run ");
if (fsflags & FS_INDEXDIRS)
printf("indexed-directories ");
if (fsflags & FS_ACLS)
printf("acls ");
if (fsflags & FS_MULTILABEL)
printf("multilabel ");
if (fsflags & FS_GJOURNAL)
printf("gjournal ");
if (fsflags & FS_FLAGS_UPDATED)
printf("fs_flags-expanded ");
if (fsflags & FS_NFS4ACLS)
printf("nfsv4acls ");
if (fsflags & FS_TRIM)
printf("trim ");
fsflags &= ~(FS_UNCLEAN | FS_DOSOFTDEP | FS_NEEDSFSCK | FS_METACKHASH |
FS_ACLS | FS_MULTILABEL | FS_GJOURNAL | FS_FLAGS_UPDATED |
FS_NFS4ACLS | FS_SUJ | FS_TRIM | FS_INDEXDIRS);
if (fsflags != 0)
printf("unknown-flags (%#x)", fsflags);
putchar('\n');
if (afs.fs_flags & FS_METACKHASH) {
printf("check hashes\t");
fsflags = afs.fs_metackhash;
if (fsflags == 0)
printf("none");
if (fsflags & CK_SUPERBLOCK)
printf("superblock ");
if (fsflags & CK_CYLGRP)
printf("cylinder-groups ");
if (fsflags & CK_INODE)
printf("inodes ");
if (fsflags & CK_INDIR)
printf("indirect-blocks ");
if (fsflags & CK_DIR)
printf("directories ");
}
fsflags &= ~(CK_SUPERBLOCK | CK_CYLGRP | CK_INODE | CK_INDIR | CK_DIR);
if (fsflags != 0)
printf("unknown flags (%#x)", fsflags);
putchar('\n');
printf("fsmnt\t%s\n", afs.fs_fsmnt);
printf("volname\t%s\tswuid\t%ju\tprovidersize\t%ju\n",
afs.fs_volname, (uintmax_t)afs.fs_swuid,
(uintmax_t)afs.fs_providersize);
printf("\ncs[].cs_(nbfree,ndir,nifree,nffree):\n\t");
for (i = 0; i < afs.fs_ncg; i++) {
struct csum *cs = &afs.fs_cs(&afs, i);
if (i && i % 4 == 0)
printf("\n\t");
printf("(%d,%d,%d,%d) ",
cs->cs_nbfree, cs->cs_ndir, cs->cs_nifree, cs->cs_nffree);
}
printf("\n");
if (fssize % afs.fs_fpg) {
if (disk.d_ufs == 1)
printf("cylinders in last group %d\n",
howmany(afs.fs_old_size % afs.fs_fpg,
afs.fs_old_spc / afs.fs_old_nspf));
printf("blocks in last group %ld\n\n",
(long)((fssize % afs.fs_fpg) / afs.fs_frag));
}
if (dosb)
return (0);
while ((i = cgread(&disk)) != 0) {
if (i == -1 || dumpcg())
goto err;
}
return (0);
err: ufserr(name);
return (1);
}
static int
dumpcg(void)
{
time_t cgtime;
off_t cur;
int i, j;
printf("\ncg %d:\n", disk.d_lcg);
cur = fsbtodb(&afs, cgtod(&afs, disk.d_lcg)) * disk.d_bsize;
switch (disk.d_ufs) {
case 2:
cgtime = acg.cg_time;
printf("magic\t%x\ttell\t%jx\ttime\t%s",
acg.cg_magic, (intmax_t)cur, ctime(&cgtime));
printf("cgx\t%d\tndblk\t%d\tniblk\t%d\tinitiblk %d\tunrefs %d\n",
acg.cg_cgx, acg.cg_ndblk, acg.cg_niblk, acg.cg_initediblk,
acg.cg_unrefs);
break;
case 1:
cgtime = acg.cg_old_time;
printf("magic\t%x\ttell\t%jx\ttime\t%s",
acg.cg_magic, (intmax_t)cur, ctime(&cgtime));
printf("cgx\t%d\tncyl\t%d\tniblk\t%d\tndblk\t%d\n",
acg.cg_cgx, acg.cg_old_ncyl, acg.cg_old_niblk,
acg.cg_ndblk);
break;
default:
break;
}
printf("nbfree\t%d\tndir\t%d\tnifree\t%d\tnffree\t%d\n",
acg.cg_cs.cs_nbfree, acg.cg_cs.cs_ndir,
acg.cg_cs.cs_nifree, acg.cg_cs.cs_nffree);
printf("rotor\t%d\tirotor\t%d\tfrotor\t%d\nfrsum",
acg.cg_rotor, acg.cg_irotor, acg.cg_frotor);
for (i = 1, j = 0; i < afs.fs_frag; i++) {
printf("\t%d", acg.cg_frsum[i]);
j += i * acg.cg_frsum[i];
}
printf("\nsum of frsum: %d", j);
if (afs.fs_contigsumsize > 0) {
for (i = 1; i < afs.fs_contigsumsize; i++) {
if ((i - 1) % 8 == 0)
printf("\nclusters %d-%d:", i,
MIN(afs.fs_contigsumsize - 1, i + 7));
printf("\t%d", cg_clustersum(&acg)[i]);
}
printf("\nclusters size %d and over: %d\n",
afs.fs_contigsumsize,
cg_clustersum(&acg)[afs.fs_contigsumsize]);
printf("clusters free:\t");
pbits(cg_clustersfree(&acg), acg.cg_nclusterblks);
} else
printf("\n");
printf("inodes used:\t");
pbits(cg_inosused(&acg), afs.fs_ipg);
printf("blks free:\t");
pbits(cg_blksfree(&acg), afs.fs_fpg);
return (0);
}
static int
dumpfreespace(const char *name, int fflag)
{
int i;
while ((i = cgread(&disk)) != 0) {
if (i == -1)
goto err;
dumpfreespacecg(fflag);
}
return (0);
err:
ufserr(name);
return (1);
}
static void
dumpfreespacecg(int fflag)
{
pblklist(cg_blksfree(&acg), afs.fs_fpg, disk.d_lcg * afs.fs_fpg,
fflag);
}
static int
marshal(const char *name)
{
struct fs *fs;
fs = &disk.d_fs;
printf("# newfs command for %s (%s)\n", name, disk.d_name);
printf("newfs ");
if (fs->fs_volname[0] != '\0')
printf("-L %s ", fs->fs_volname);
printf("-O %d ", disk.d_ufs);
if (fs->fs_flags & FS_DOSOFTDEP)
printf("-U ");
printf("-a %d ", fs->fs_maxcontig);
printf("-b %d ", fs->fs_bsize);
/* -c is dumb */
printf("-d %d ", fs->fs_maxbsize);
printf("-e %d ", fs->fs_maxbpg);
printf("-f %d ", fs->fs_fsize);
printf("-g %d ", fs->fs_avgfilesize);
printf("-h %d ", fs->fs_avgfpdir);
printf("-i %jd ", fragroundup(fs, lblktosize(fs, fragstoblks(fs,
fs->fs_fpg)) / fs->fs_ipg));
if (fs->fs_flags & FS_SUJ)
printf("-j ");
if (fs->fs_flags & FS_GJOURNAL)
printf("-J ");
printf("-k %jd ", fs->fs_metaspace);
if (fs->fs_flags & FS_MULTILABEL)
printf("-l ");
printf("-m %d ", fs->fs_minfree);
/* -n unimplemented */
printf("-o ");
switch (fs->fs_optim) {
case FS_OPTSPACE:
printf("space ");
break;
case FS_OPTTIME:
printf("time ");
break;
default:
printf("unknown ");
break;
}
/* -p..r unimplemented */
printf("-s %jd ", (intmax_t)fsbtodb(fs, fs->fs_size));
if (fs->fs_flags & FS_TRIM)
printf("-t ");
printf("%s ", disk.d_name);
printf("\n");
return 0;
}
static void
pbits(void *vp, int max)
{
int i;
char *p;
int count, j;
for (count = i = 0, p = vp; i < max; i++)
if (isset(p, i)) {
if (count)
printf(",%s", count % 6 ? " " : "\n\t");
count++;
printf("%d", i);
j = i;
while ((i+1)<max && isset(p, i+1))
i++;
if (i != j)
printf("-%d", i);
}
printf("\n");
}
static void
pblklist(void *vp, int max, off_t offset, int fflag)
{
int i, j;
char *p;
for (i = 0, p = vp; i < max; i++) {
if (isset(p, i)) {
printf("%jd", (intmax_t)(i + offset));
if (fflag < 2) {
j = i;
while ((i+1)<max && isset(p, i+1))
i++;
if (i != j)
printf("-%jd", (intmax_t)(i + offset));
}
printf("\n");
}
}
}
static void
ufserr(const char *name)
{
if (disk.d_error != NULL)
warnx("%s: %s", name, disk.d_error);
else if (errno)
warn("%s", name);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: dumpfs [-flm] filesys | device\n");
exit(1);
}
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