2017-11-20 19:49:47 +00:00
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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1994-05-26 06:35:07 +00:00
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. 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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2017-02-28 23:42:47 +00:00
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* 3. Neither the name of the University nor the names of its contributors
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1994-05-26 06:35:07 +00:00
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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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1998-12-03 02:41:11 +00:00
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#if 0
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2003-05-03 18:41:59 +00:00
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|
#ifndef lint
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1997-03-11 12:20:21 +00:00
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static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
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1994-05-26 06:35:07 +00:00
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|
#endif /* not lint */
|
2003-05-03 18:41:59 +00:00
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|
#endif
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#include <sys/cdefs.h>
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|
|
__FBSDID("$FreeBSD$");
|
1994-05-26 06:35:07 +00:00
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#include <sys/param.h>
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2017-09-04 20:19:36 +00:00
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#include <sys/disk.h>
|
1994-05-26 06:35:07 +00:00
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|
#include <sys/stat.h>
|
2002-08-16 16:08:36 +00:00
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|
#define FSTYPENAMES
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1994-05-26 06:35:07 +00:00
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#include <sys/disklabel.h>
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#include <sys/file.h>
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2001-11-17 23:48:21 +00:00
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#include <sys/sysctl.h>
|
1997-03-11 12:20:21 +00:00
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <ctype.h>
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#include <err.h>
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1994-05-26 06:35:07 +00:00
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|
#include <errno.h>
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2002-09-25 04:06:37 +00:00
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|
#include <limits.h>
|
2002-07-31 12:01:14 +00:00
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#include <stdint.h>
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1994-05-26 06:35:07 +00:00
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#include <string.h>
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2018-01-24 23:57:40 +00:00
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#include <libufs.h>
|
1997-03-11 12:20:21 +00:00
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1994-05-26 06:35:07 +00:00
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#include "fsck.h"
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2021-01-07 01:37:08 +00:00
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struct inoinfo **inphead, **inpsort; /* info about all inodes */
|
2020-03-29 20:03:46 +00:00
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|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
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|
static int sbhashfailed;
|
1994-05-26 06:35:07 +00:00
|
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|
#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
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|
|
2017-08-09 05:17:21 +00:00
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static int calcsb(char *dev, int devfd, struct fs *fs);
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|
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static void saverecovery(int readfd, int writefd);
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static int chkrecovery(int devfd);
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|
|
|
1997-03-11 12:20:21 +00:00
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|
/*
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|
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|
* Read in a superblock finding an alternate if necessary.
|
2002-08-21 18:11:48 +00:00
|
|
|
* Return 1 if successful, 0 if unsuccessful, -1 if file system
|
2009-01-30 18:33:05 +00:00
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|
* is already clean (ckclean and preen mode only).
|
1997-03-11 12:20:21 +00:00
|
|
|
*/
|
1995-04-02 14:52:29 +00:00
|
|
|
int
|
2002-03-20 22:57:10 +00:00
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setup(char *dev)
|
1994-05-26 06:35:07 +00:00
|
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|
{
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
long bmapsize;
|
1994-05-26 06:35:07 +00:00
|
|
|
|
2022-02-04 19:46:36 +00:00
|
|
|
/*
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
* We are expected to have an open file descriptor and a superblock.
|
2022-02-04 19:46:36 +00:00
|
|
|
*/
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
if (fsreadfd < 0 || havesb == 0) {
|
|
|
|
if (debug)
|
|
|
|
printf("setup: bad fsreadfd or missing superblock\n");
|
1994-05-26 06:35:07 +00:00
|
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|
return (0);
|
|
|
|
}
|
2022-02-04 19:46:36 +00:00
|
|
|
if (preen == 0)
|
|
|
|
printf("** %s", dev);
|
|
|
|
if (bkgrdflag == 0 &&
|
|
|
|
(nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
|
|
|
|
fswritefd = -1;
|
|
|
|
if (preen)
|
|
|
|
pfatal("NO WRITE ACCESS");
|
|
|
|
printf(" (NO WRITE)");
|
|
|
|
}
|
|
|
|
if (preen == 0)
|
|
|
|
printf("\n");
|
|
|
|
if (sbhashfailed != 0) {
|
|
|
|
pwarn("SUPERBLOCK CHECK HASH FAILED");
|
|
|
|
if (fswritefd == -1)
|
|
|
|
pwarn("OPENED READONLY SO CANNOT CORRECT CHECK HASH\n");
|
|
|
|
else if (preen || reply("CORRECT CHECK HASH") != 0) {
|
|
|
|
if (preen)
|
|
|
|
printf(" (CORRECTED)\n");
|
|
|
|
sblock.fs_clean = 0;
|
|
|
|
sbdirty();
|
|
|
|
}
|
|
|
|
}
|
2009-01-30 18:33:05 +00:00
|
|
|
if (skipclean && ckclean && sblock.fs_clean) {
|
2003-08-01 11:31:19 +00:00
|
|
|
pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
|
1998-12-03 02:27:35 +00:00
|
|
|
return (-1);
|
|
|
|
}
|
1994-05-26 06:35:07 +00:00
|
|
|
maxfsblock = sblock.fs_size;
|
|
|
|
maxino = sblock.fs_ncg * sblock.fs_ipg;
|
|
|
|
/*
|
|
|
|
* Check and potentially fix certain fields in the super block.
|
|
|
|
*/
|
|
|
|
if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
|
|
|
|
pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
|
|
|
|
if (reply("SET TO DEFAULT") == 1) {
|
|
|
|
sblock.fs_optim = FS_OPTTIME;
|
|
|
|
sbdirty();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
|
|
|
|
pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
|
|
|
|
sblock.fs_minfree);
|
|
|
|
if (reply("SET TO DEFAULT") == 1) {
|
|
|
|
sblock.fs_minfree = 10;
|
|
|
|
sbdirty();
|
|
|
|
}
|
|
|
|
}
|
2002-06-21 06:18:05 +00:00
|
|
|
if (sblock.fs_magic == FS_UFS1_MAGIC &&
|
|
|
|
sblock.fs_old_inodefmt < FS_44INODEFMT) {
|
2002-08-21 18:11:48 +00:00
|
|
|
pwarn("Format of file system is too old.\n");
|
2002-05-12 23:44:15 +00:00
|
|
|
pwarn("Must update to modern format using a version of fsck\n");
|
|
|
|
pfatal("from before 2002 with the command ``fsck -c 2''\n");
|
|
|
|
exit(EEXIT);
|
1994-05-26 06:35:07 +00:00
|
|
|
}
|
2017-08-09 05:17:21 +00:00
|
|
|
if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
|
|
|
|
fswritefd != -1 && chkrecovery(fsreadfd) == 0 &&
|
|
|
|
reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0)
|
|
|
|
saverecovery(fsreadfd, fswritefd);
|
1994-05-26 06:35:07 +00:00
|
|
|
/*
|
|
|
|
* allocate and initialize the necessary maps
|
|
|
|
*/
|
2022-08-13 20:27:37 +00:00
|
|
|
bufinit();
|
2002-09-25 04:06:37 +00:00
|
|
|
bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short));
|
2013-03-23 20:00:02 +00:00
|
|
|
blockmap = Calloc((unsigned)bmapsize, sizeof (char));
|
1994-05-26 06:35:07 +00:00
|
|
|
if (blockmap == NULL) {
|
|
|
|
printf("cannot alloc %u bytes for blockmap\n",
|
|
|
|
(unsigned)bmapsize);
|
|
|
|
goto badsb;
|
|
|
|
}
|
2017-04-22 14:50:11 +00:00
|
|
|
inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist));
|
1998-12-03 02:27:35 +00:00
|
|
|
if (inostathead == NULL) {
|
|
|
|
printf("cannot alloc %u bytes for inostathead\n",
|
|
|
|
(unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
|
1994-05-26 06:35:07 +00:00
|
|
|
goto badsb;
|
|
|
|
}
|
2002-12-02 19:30:37 +00:00
|
|
|
numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128);
|
2000-02-28 20:02:41 +00:00
|
|
|
dirhash = numdirs;
|
1994-05-26 06:35:07 +00:00
|
|
|
inplast = 0;
|
|
|
|
listmax = numdirs + 10;
|
2017-04-22 14:50:11 +00:00
|
|
|
inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *));
|
|
|
|
inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *));
|
1994-05-26 06:35:07 +00:00
|
|
|
if (inpsort == NULL || inphead == NULL) {
|
2002-07-31 12:01:14 +00:00
|
|
|
printf("cannot alloc %ju bytes for inphead\n",
|
|
|
|
(uintmax_t)numdirs * sizeof(struct inoinfo *));
|
1994-05-26 06:35:07 +00:00
|
|
|
goto badsb;
|
|
|
|
}
|
1998-03-08 09:59:44 +00:00
|
|
|
if (sblock.fs_flags & FS_DOSOFTDEP)
|
|
|
|
usedsoftdep = 1;
|
|
|
|
else
|
|
|
|
usedsoftdep = 0;
|
1994-05-26 06:35:07 +00:00
|
|
|
return (1);
|
|
|
|
|
|
|
|
badsb:
|
1997-03-11 12:20:21 +00:00
|
|
|
ckfini(0);
|
1994-05-26 06:35:07 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2022-02-23 23:39:52 +00:00
|
|
|
/*
|
|
|
|
* Open a device or file to be checked by fsck.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
openfilesys(char *dev)
|
|
|
|
{
|
|
|
|
struct stat statb;
|
|
|
|
int saved_fsreadfd;
|
|
|
|
|
2022-03-16 18:37:15 +00:00
|
|
|
if (stat(dev, &statb) < 0)
|
2022-02-23 23:39:52 +00:00
|
|
|
return (0);
|
|
|
|
if ((statb.st_mode & S_IFMT) != S_IFCHR &&
|
|
|
|
(statb.st_mode & S_IFMT) != S_IFBLK) {
|
|
|
|
if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
|
|
|
|
pfatal("BACKGROUND FSCK LACKS A SNAPSHOT\n");
|
|
|
|
exit(EEXIT);
|
|
|
|
}
|
|
|
|
if (bkgrdflag != 0) {
|
|
|
|
cursnapshot = statb.st_ino;
|
|
|
|
} else {
|
|
|
|
pfatal("%s IS NOT A DISK DEVICE\n", dev);
|
|
|
|
if (reply("CONTINUE") == 0)
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
saved_fsreadfd = fsreadfd;
|
|
|
|
if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
|
|
|
|
fsreadfd = saved_fsreadfd;
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
if (saved_fsreadfd != -1)
|
|
|
|
close(saved_fsreadfd);
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
1994-05-26 06:35:07 +00:00
|
|
|
/*
|
|
|
|
* Read in the super block and its summary info.
|
|
|
|
*/
|
2001-04-16 22:22:21 +00:00
|
|
|
int
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
readsb(void)
|
1994-05-26 06:35:07 +00:00
|
|
|
{
|
2018-01-26 00:58:32 +00:00
|
|
|
struct fs *fs;
|
1994-05-26 06:35:07 +00:00
|
|
|
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
sbhashfailed = 0;
|
2018-01-26 00:58:32 +00:00
|
|
|
readcnt[sblk.b_type]++;
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
/*
|
|
|
|
* If bflag is given, then check just that superblock.
|
|
|
|
*/
|
|
|
|
if (bflag) {
|
2022-08-17 20:52:41 +00:00
|
|
|
switch (sbget(fsreadfd, &fs, bflag * dev_bsize, 0)) {
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
case 0:
|
|
|
|
goto goodsb;
|
2022-02-04 19:46:36 +00:00
|
|
|
case EINTEGRITY:
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
printf("Check hash failed for superblock at %jd\n",
|
|
|
|
bflag);
|
|
|
|
return (0);
|
2018-01-26 00:58:32 +00:00
|
|
|
case ENOENT:
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
printf("%jd is not a file system superblock\n", bflag);
|
2002-12-02 19:30:37 +00:00
|
|
|
return (0);
|
2018-01-26 00:58:32 +00:00
|
|
|
case EIO:
|
|
|
|
default:
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
printf("I/O error reading %jd\n", bflag);
|
2002-06-21 06:18:05 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
}
|
Move the ability to search for alternate UFS superblocks from fsck_ffs(8)
into ffs_sbsearch() to allow use by other parts of the system.
Historically only fsck_ffs(8), the UFS filesystem checker, had code
to track down and use alternate UFS superblocks. Since fsdb(8) used
much of the fsck_ffs(8) implementation it had some ability to track
down alternate superblocks.
This change extracts the code to track down alternate superblocks
from fsck_ffs(8) and puts it into a new function ffs_sbsearch() in
sys/ufs/ffs/ffs_subr.c. Like ffs_sbget() and ffs_sbput() also found
in ffs_subr.c, these functions can be used directly by the kernel
subsystems. Additionally they are exported to the UFS library,
libufs(8) so that they can be used by user-level programs. The new
functions added to libufs(8) are sbfind(3) that is an alternative
to sbread(3) and sbsearch(3) that is an alternative to sbget(3).
See their manual pages for further details.
The utilities that have been changed to search for superblocks are
dumpfs(8), fsdb(8), ffsinfo(8), and fsck_ffs(8). Also, the prtblknos(8)
tool found in tools/diag/prtblknos searches for superblocks.
The UFS specific mount code uses the superblock search interface
when mounting the root filesystem and when the administrator doing
a mount(8) command specifies the force flag (-f). The standalone UFS
boot code (found in stand/libsa/ufs.c) uses the superblock search
code in the hope of being able to get the system up and running so
that fsck_ffs(8) can be used to get the filesystem cleaned up.
The following utilities have not been changed to search for
superblocks: clri(8), tunefs(8), snapinfo(8), fstyp(8), quot(8),
dump(8), fsirand(8), growfs(8), quotacheck(8), gjournal(8), and
glabel(8). When these utilities fail, they do report the cause of
the failure. The one exception is the tasting code used to try and
figure what a given disk contains. The tasting code will remain
silent so as not to put out a slew of messages as it trying to taste
every new mass storage device that shows up.
Reviewed by: kib
Reviewed by: Warner Losh
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D36053
Sponsored by: The FreeBSD Foundation
2022-08-13 19:41:53 +00:00
|
|
|
/*
|
|
|
|
* Check for the standard superblock and use it if good.
|
|
|
|
*/
|
|
|
|
if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG) == 0)
|
|
|
|
goto goodsb;
|
|
|
|
/*
|
|
|
|
* Check if the only problem is a check-hash failure.
|
|
|
|
*/
|
|
|
|
skipclean = 0;
|
|
|
|
if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG | UFS_NOHASHFAIL) == 0) {
|
|
|
|
sbhashfailed = 1;
|
|
|
|
goto goodsb;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Do an exhaustive search for a usable superblock.
|
|
|
|
*/
|
|
|
|
switch (sbsearch(fsreadfd, &fs, 0)) {
|
|
|
|
case 0:
|
|
|
|
goto goodsb;
|
|
|
|
case ENOENT:
|
|
|
|
printf("SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. "
|
|
|
|
"YOU MUST USE THE\n-b OPTION TO FSCK TO SPECIFY "
|
|
|
|
"THE LOCATION OF AN ALTERNATE\nSUPER-BLOCK TO "
|
|
|
|
"SUPPLY NEEDED INFORMATION; SEE fsck_ffs(8).\n");
|
|
|
|
return (0);
|
|
|
|
case EIO:
|
|
|
|
default:
|
|
|
|
printf("I/O error reading a usable superblock\n");
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
goodsb:
|
2018-01-26 00:58:32 +00:00
|
|
|
memcpy(&sblock, fs, fs->fs_sbsize);
|
|
|
|
free(fs);
|
1994-05-26 06:35:07 +00:00
|
|
|
/*
|
2002-08-21 18:11:48 +00:00
|
|
|
* Compute block size that the file system is based on,
|
1994-05-26 06:35:07 +00:00
|
|
|
* according to fsbtodb, and adjust superblock block number
|
|
|
|
* so we can tell if this is an alternate later.
|
|
|
|
*/
|
|
|
|
dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
|
2018-01-26 00:58:32 +00:00
|
|
|
sblk.b_bno = sblock.fs_sblockactualloc / dev_bsize;
|
2002-06-21 06:18:05 +00:00
|
|
|
sblk.b_size = SBLOCKSIZE;
|
|
|
|
/*
|
|
|
|
* If not yet done, update UFS1 superblock with new wider fields.
|
|
|
|
*/
|
|
|
|
if (sblock.fs_magic == FS_UFS1_MAGIC &&
|
|
|
|
sblock.fs_maxbsize != sblock.fs_bsize) {
|
|
|
|
sblock.fs_maxbsize = sblock.fs_bsize;
|
|
|
|
sblock.fs_time = sblock.fs_old_time;
|
|
|
|
sblock.fs_size = sblock.fs_old_size;
|
|
|
|
sblock.fs_dsize = sblock.fs_old_dsize;
|
|
|
|
sblock.fs_csaddr = sblock.fs_old_csaddr;
|
|
|
|
sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir;
|
|
|
|
sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree;
|
|
|
|
sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree;
|
|
|
|
sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree;
|
|
|
|
}
|
1994-05-26 06:35:07 +00:00
|
|
|
havesb = 1;
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
2001-04-23 21:39:14 +00:00
|
|
|
void
|
2002-03-20 22:57:10 +00:00
|
|
|
sblock_init(void)
|
2001-04-16 22:22:21 +00:00
|
|
|
{
|
|
|
|
|
2022-02-23 23:39:52 +00:00
|
|
|
fsreadfd = -1;
|
2001-04-16 22:22:21 +00:00
|
|
|
fswritefd = -1;
|
|
|
|
fsmodified = 0;
|
|
|
|
lfdir = 0;
|
2013-02-24 06:44:29 +00:00
|
|
|
initbarea(&sblk, BT_SUPERBLK);
|
2013-03-23 20:00:02 +00:00
|
|
|
sblk.b_un.b_buf = Malloc(SBLOCKSIZE);
|
2022-08-04 23:06:43 +00:00
|
|
|
if (sblk.b_un.b_buf == NULL)
|
2001-04-16 22:22:21 +00:00
|
|
|
errx(EEXIT, "cannot allocate space for superblock");
|
2015-01-06 05:28:37 +00:00
|
|
|
dev_bsize = secsize = DEV_BSIZE;
|
1994-05-26 06:35:07 +00:00
|
|
|
}
|
2017-08-09 05:17:21 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Calculate a prototype superblock based on information in the boot area.
|
|
|
|
* When done the cgsblock macro can be calculated and the fs_ncg field
|
|
|
|
* can be used. Do NOT attempt to use other macros without verifying that
|
|
|
|
* their needed information is available!
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
calcsb(char *dev, int devfd, struct fs *fs)
|
|
|
|
{
|
2017-09-04 20:19:36 +00:00
|
|
|
struct fsrecovery *fsr;
|
|
|
|
char *fsrbuf;
|
|
|
|
u_int secsize;
|
2017-08-09 05:17:21 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We need fragments-per-group and the partition-size.
|
|
|
|
*
|
|
|
|
* Newfs stores these details at the end of the boot block area
|
|
|
|
* at the start of the filesystem partition. If they have been
|
|
|
|
* overwritten by a boot block, we fail. But usually they are
|
|
|
|
* there and we can use them.
|
|
|
|
*/
|
2017-09-04 20:19:36 +00:00
|
|
|
if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1)
|
|
|
|
return (0);
|
|
|
|
fsrbuf = Malloc(secsize);
|
|
|
|
if (fsrbuf == NULL)
|
|
|
|
errx(EEXIT, "calcsb: cannot allocate recovery buffer");
|
|
|
|
if (blread(devfd, fsrbuf,
|
2019-12-10 20:04:08 +00:00
|
|
|
(SBLOCK_UFS2 - secsize) / dev_bsize, secsize) != 0) {
|
|
|
|
free(fsrbuf);
|
2017-09-04 20:19:36 +00:00
|
|
|
return (0);
|
2019-12-10 20:04:08 +00:00
|
|
|
}
|
2017-09-04 20:19:36 +00:00
|
|
|
fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
|
2019-12-10 20:04:08 +00:00
|
|
|
if (fsr->fsr_magic != FS_UFS2_MAGIC) {
|
|
|
|
free(fsrbuf);
|
2017-08-09 05:17:21 +00:00
|
|
|
return (0);
|
2019-12-10 20:04:08 +00:00
|
|
|
}
|
2017-08-09 05:17:21 +00:00
|
|
|
memset(fs, 0, sizeof(struct fs));
|
2017-09-04 20:19:36 +00:00
|
|
|
fs->fs_fpg = fsr->fsr_fpg;
|
|
|
|
fs->fs_fsbtodb = fsr->fsr_fsbtodb;
|
|
|
|
fs->fs_sblkno = fsr->fsr_sblkno;
|
|
|
|
fs->fs_magic = fsr->fsr_magic;
|
|
|
|
fs->fs_ncg = fsr->fsr_ncg;
|
|
|
|
free(fsrbuf);
|
2017-08-09 05:17:21 +00:00
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check to see if recovery information exists.
|
2017-09-04 20:19:36 +00:00
|
|
|
* Return 1 if it exists or cannot be created.
|
|
|
|
* Return 0 if it does not exist and can be created.
|
2017-08-09 05:17:21 +00:00
|
|
|
*/
|
|
|
|
static int
|
|
|
|
chkrecovery(int devfd)
|
|
|
|
{
|
2017-09-04 20:19:36 +00:00
|
|
|
struct fsrecovery *fsr;
|
|
|
|
char *fsrbuf;
|
2022-02-20 21:18:05 +00:00
|
|
|
u_int secsize, rdsize;
|
2017-08-09 05:17:21 +00:00
|
|
|
|
2017-09-04 20:19:36 +00:00
|
|
|
/*
|
|
|
|
* Could not determine if backup material exists, so do not
|
|
|
|
* offer to create it.
|
|
|
|
*/
|
2019-12-10 20:04:08 +00:00
|
|
|
fsrbuf = NULL;
|
2022-02-20 21:18:05 +00:00
|
|
|
rdsize = sblock.fs_fsize;
|
2017-09-04 20:19:36 +00:00
|
|
|
if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1 ||
|
2022-02-20 21:18:05 +00:00
|
|
|
rdsize % secsize != 0 ||
|
|
|
|
(fsrbuf = Malloc(rdsize)) == NULL ||
|
|
|
|
blread(devfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize,
|
|
|
|
rdsize) != 0) {
|
2019-12-10 20:04:08 +00:00
|
|
|
free(fsrbuf);
|
2017-09-04 20:19:36 +00:00
|
|
|
return (1);
|
2019-12-10 20:04:08 +00:00
|
|
|
}
|
2017-09-04 20:19:36 +00:00
|
|
|
/*
|
|
|
|
* Recovery material has already been created, so do not
|
|
|
|
* need to create it again.
|
|
|
|
*/
|
2022-02-20 21:18:05 +00:00
|
|
|
fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr];
|
2017-09-04 20:19:36 +00:00
|
|
|
if (fsr->fsr_magic == FS_UFS2_MAGIC) {
|
|
|
|
free(fsrbuf);
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Recovery material has not been created and can be if desired.
|
|
|
|
*/
|
|
|
|
free(fsrbuf);
|
|
|
|
return (0);
|
2017-08-09 05:17:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2022-02-20 21:18:05 +00:00
|
|
|
* Read the last filesystem-size piece of the boot block, replace the
|
|
|
|
* last 20 bytes with the recovery information, then write it back.
|
2017-08-09 05:17:21 +00:00
|
|
|
* The recovery information only works for UFS2 filesystems.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
saverecovery(int readfd, int writefd)
|
|
|
|
{
|
2017-09-04 20:19:36 +00:00
|
|
|
struct fsrecovery *fsr;
|
|
|
|
char *fsrbuf;
|
2022-02-20 21:18:05 +00:00
|
|
|
u_int secsize, rdsize;
|
2017-08-09 05:17:21 +00:00
|
|
|
|
2019-12-10 20:04:08 +00:00
|
|
|
fsrbuf = NULL;
|
2022-02-20 21:18:05 +00:00
|
|
|
rdsize = sblock.fs_fsize;
|
2017-08-09 05:17:21 +00:00
|
|
|
if (sblock.fs_magic != FS_UFS2_MAGIC ||
|
2017-09-04 20:19:36 +00:00
|
|
|
ioctl(readfd, DIOCGSECTORSIZE, &secsize) == -1 ||
|
2022-02-20 21:18:05 +00:00
|
|
|
rdsize % secsize != 0 ||
|
|
|
|
(fsrbuf = Malloc(rdsize)) == NULL ||
|
|
|
|
blread(readfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize,
|
|
|
|
rdsize) != 0) {
|
2017-09-04 20:19:36 +00:00
|
|
|
printf("RECOVERY DATA COULD NOT BE CREATED\n");
|
2019-12-10 20:04:08 +00:00
|
|
|
free(fsrbuf);
|
2017-08-09 05:17:21 +00:00
|
|
|
return;
|
2017-09-04 20:19:36 +00:00
|
|
|
}
|
2022-02-20 21:18:05 +00:00
|
|
|
fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr];
|
2017-09-04 20:19:36 +00:00
|
|
|
fsr->fsr_magic = sblock.fs_magic;
|
|
|
|
fsr->fsr_fpg = sblock.fs_fpg;
|
|
|
|
fsr->fsr_fsbtodb = sblock.fs_fsbtodb;
|
|
|
|
fsr->fsr_sblkno = sblock.fs_sblkno;
|
|
|
|
fsr->fsr_ncg = sblock.fs_ncg;
|
2022-02-20 21:18:05 +00:00
|
|
|
blwrite(writefd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, rdsize);
|
2017-09-04 20:19:36 +00:00
|
|
|
free(fsrbuf);
|
2017-08-09 05:17:21 +00:00
|
|
|
}
|