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 */
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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("$FreeBSD$");
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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>
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1994-05-26 06:35:07 +00:00
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#include <sys/stat.h>
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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>
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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>
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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>
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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 */
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2020-03-29 20:03:46 +00:00
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1994-05-26 06:35:07 +00:00
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struct bufarea asblk;
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#define altsblock (*asblk.b_un.b_fs)
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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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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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* Read in a superblock finding an alternate if necessary.
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2002-08-21 18:11:48 +00:00
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* Return 1 if successful, 0 if unsuccessful, -1 if file system
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2009-01-30 18:33:05 +00:00
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* is already clean (ckclean and preen mode only).
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1997-03-11 12:20:21 +00:00
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*/
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1995-04-02 14:52:29 +00:00
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int
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2002-03-20 22:57:10 +00:00
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setup(char *dev)
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1994-05-26 06:35:07 +00:00
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{
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2022-02-04 19:46:36 +00:00
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long cg, bmapsize;
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2017-08-09 05:17:21 +00:00
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struct fs proto;
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1994-05-26 06:35:07 +00:00
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2022-02-04 19:46:36 +00:00
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/*
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* We are expected to have an open file descriptor
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*/
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if (fsreadfd < 0)
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1994-05-26 06:35:07 +00:00
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return (0);
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/*
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2022-02-04 19:46:36 +00:00
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* If we do not yet have a superblock, read it in looking
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* for alternates if necessary.
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1994-05-26 06:35:07 +00:00
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*/
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2022-02-04 19:46:36 +00:00
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if (havesb == 0 && readsb(1) == 0) {
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1997-03-11 12:20:21 +00:00
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skipclean = 0;
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2017-08-09 05:17:21 +00:00
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if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
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1994-05-26 06:35:07 +00:00
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return(0);
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2017-08-09 05:17:21 +00:00
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if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
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return (0);
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for (cg = 0; cg < proto.fs_ncg; cg++) {
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bflag = fsbtodb(&proto, cgsblock(&proto, cg));
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if (readsb(0) != 0)
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break;
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}
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if (cg >= proto.fs_ncg) {
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2022-02-04 19:46:36 +00:00
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printf("SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. "
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"YOU MUST USE THE\n-b OPTION TO FSCK TO SPECIFY "
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"THE LOCATION OF AN ALTERNATE\nSUPER-BLOCK TO "
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"SUPPLY NEEDED INFORMATION; SEE fsck_ffs(8).\n");
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2017-08-09 05:17:21 +00:00
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bflag = 0;
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return(0);
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}
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pwarn("USING ALTERNATE SUPERBLOCK AT %jd\n", bflag);
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bflag = 0;
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1994-05-26 06:35:07 +00:00
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}
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2022-02-04 19:46:36 +00:00
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if (preen == 0)
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printf("** %s", dev);
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if (bkgrdflag == 0 &&
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(nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
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fswritefd = -1;
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if (preen)
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pfatal("NO WRITE ACCESS");
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printf(" (NO WRITE)");
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}
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if (preen == 0)
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printf("\n");
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if (sbhashfailed != 0) {
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pwarn("SUPERBLOCK CHECK HASH FAILED");
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if (fswritefd == -1)
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pwarn("OPENED READONLY SO CANNOT CORRECT CHECK HASH\n");
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else if (preen || reply("CORRECT CHECK HASH") != 0) {
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if (preen)
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printf(" (CORRECTED)\n");
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sblock.fs_clean = 0;
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sbdirty();
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}
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}
|
2009-01-30 18:33:05 +00:00
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if (skipclean && ckclean && sblock.fs_clean) {
|
2003-08-01 11:31:19 +00:00
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pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
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1998-12-03 02:27:35 +00:00
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return (-1);
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}
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1994-05-26 06:35:07 +00:00
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maxfsblock = sblock.fs_size;
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maxino = sblock.fs_ncg * sblock.fs_ipg;
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/*
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* Check and potentially fix certain fields in the super block.
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*/
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if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
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pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
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if (reply("SET TO DEFAULT") == 1) {
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sblock.fs_optim = FS_OPTTIME;
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sbdirty();
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}
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}
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if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
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pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
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sblock.fs_minfree);
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if (reply("SET TO DEFAULT") == 1) {
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sblock.fs_minfree = 10;
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sbdirty();
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}
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}
|
2002-06-21 06:18:05 +00:00
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if (sblock.fs_magic == FS_UFS1_MAGIC &&
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sblock.fs_old_inodefmt < FS_44INODEFMT) {
|
2002-08-21 18:11:48 +00:00
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pwarn("Format of file system is too old.\n");
|
2002-05-12 23:44:15 +00:00
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pwarn("Must update to modern format using a version of fsck\n");
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pfatal("from before 2002 with the command ``fsck -c 2''\n");
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exit(EEXIT);
|
1994-05-26 06:35:07 +00:00
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}
|
2021-01-07 01:37:08 +00:00
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if ((asblk.b_flags & B_DIRTY) != 0 && !bflag) {
|
1997-03-11 12:20:21 +00:00
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memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
|
1994-05-26 06:35:07 +00:00
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flush(fswritefd, &asblk);
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}
|
2017-08-09 05:17:21 +00:00
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if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
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|
fswritefd != -1 && chkrecovery(fsreadfd) == 0 &&
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reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0)
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saverecovery(fsreadfd, fswritefd);
|
1994-05-26 06:35:07 +00:00
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|
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/*
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* allocate and initialize the necessary maps
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*/
|
2002-09-25 04:06:37 +00:00
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bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short));
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2013-03-23 20:00:02 +00:00
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blockmap = Calloc((unsigned)bmapsize, sizeof (char));
|
1994-05-26 06:35:07 +00:00
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if (blockmap == NULL) {
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printf("cannot alloc %u bytes for blockmap\n",
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(unsigned)bmapsize);
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goto badsb;
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}
|
2017-04-22 14:50:11 +00:00
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inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist));
|
1998-12-03 02:27:35 +00:00
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if (inostathead == NULL) {
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printf("cannot alloc %u bytes for inostathead\n",
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(unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
|
1994-05-26 06:35:07 +00:00
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goto badsb;
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}
|
2002-12-02 19:30:37 +00:00
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numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128);
|
2000-02-28 20:02:41 +00:00
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dirhash = numdirs;
|
1994-05-26 06:35:07 +00:00
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inplast = 0;
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listmax = numdirs + 10;
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2017-04-22 14:50:11 +00:00
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inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *));
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inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *));
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1994-05-26 06:35:07 +00:00
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if (inpsort == NULL || inphead == NULL) {
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2002-07-31 12:01:14 +00:00
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printf("cannot alloc %ju bytes for inphead\n",
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(uintmax_t)numdirs * sizeof(struct inoinfo *));
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1994-05-26 06:35:07 +00:00
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goto badsb;
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}
|
2021-05-29 02:59:07 +00:00
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bufinit();
|
1998-03-08 09:59:44 +00:00
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if (sblock.fs_flags & FS_DOSOFTDEP)
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usedsoftdep = 1;
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else
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usedsoftdep = 0;
|
1994-05-26 06:35:07 +00:00
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return (1);
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badsb:
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1997-03-11 12:20:21 +00:00
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ckfini(0);
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1994-05-26 06:35:07 +00:00
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return (0);
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}
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|
2022-02-23 23:39:52 +00:00
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/*
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* Open a device or file to be checked by fsck.
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*/
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int
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openfilesys(char *dev)
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{
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struct stat statb;
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int saved_fsreadfd;
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|
|
|
2022-03-16 18:37:15 +00:00
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if (stat(dev, &statb) < 0)
|
2022-02-23 23:39:52 +00:00
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return (0);
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if ((statb.st_mode & S_IFMT) != S_IFCHR &&
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(statb.st_mode & S_IFMT) != S_IFBLK) {
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if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
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|
pfatal("BACKGROUND FSCK LACKS A SNAPSHOT\n");
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exit(EEXIT);
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}
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|
|
|
if (bkgrdflag != 0) {
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|
|
cursnapshot = statb.st_ino;
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|
|
} else {
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pfatal("%s IS NOT A DISK DEVICE\n", dev);
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|
|
if (reply("CONTINUE") == 0)
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return (0);
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|
|
|
}
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|
|
|
}
|
|
|
|
saved_fsreadfd = fsreadfd;
|
|
|
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if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
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|
fsreadfd = saved_fsreadfd;
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|
return (0);
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|
|
|
}
|
|
|
|
if (saved_fsreadfd != -1)
|
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|
|
close(saved_fsreadfd);
|
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|
|
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
|
2002-03-20 22:57:10 +00:00
|
|
|
readsb(int listerr)
|
1994-05-26 06:35:07 +00:00
|
|
|
{
|
2018-01-26 00:58:32 +00:00
|
|
|
off_t super;
|
|
|
|
int bad, ret;
|
|
|
|
struct fs *fs;
|
1994-05-26 06:35:07 +00:00
|
|
|
|
2022-02-04 19:46:36 +00:00
|
|
|
super = bflag ? bflag * dev_bsize :
|
|
|
|
sbhashfailed ? STDSB_NOHASHFAIL_NOMSG : STDSB_NOMSG;
|
2018-01-26 00:58:32 +00:00
|
|
|
readcnt[sblk.b_type]++;
|
2022-02-04 19:46:36 +00:00
|
|
|
while ((ret = sbget(fsreadfd, &fs, super)) != 0) {
|
2018-01-26 00:58:32 +00:00
|
|
|
switch (ret) {
|
2022-02-04 19:46:36 +00:00
|
|
|
case EINTEGRITY:
|
|
|
|
if (bflag || super == STDSB_NOHASHFAIL_NOMSG)
|
|
|
|
return (0);
|
|
|
|
super = STDSB_NOHASHFAIL_NOMSG;
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|
|
|
sbhashfailed = 1;
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|
|
|
continue;
|
2018-01-26 00:58:32 +00:00
|
|
|
case ENOENT:
|
|
|
|
if (bflag)
|
2020-09-01 18:50:26 +00:00
|
|
|
printf("%jd is not a file system "
|
2018-01-26 00:58:32 +00:00
|
|
|
"superblock\n", super / dev_bsize);
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|
|
|
else
|
2020-09-01 18:50:26 +00:00
|
|
|
printf("Cannot find file system "
|
2018-01-26 00:58:32 +00:00
|
|
|
"superblock\n");
|
2002-12-02 19:30:37 +00:00
|
|
|
return (0);
|
2018-01-26 00:58:32 +00:00
|
|
|
case EIO:
|
|
|
|
default:
|
2020-09-01 18:50:26 +00:00
|
|
|
printf("I/O error reading %jd\n",
|
2018-01-26 00:58:32 +00:00
|
|
|
super / dev_bsize);
|
2002-06-21 06:18:05 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
}
|
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;
|
1994-05-26 06:35:07 +00:00
|
|
|
/*
|
2002-04-07 05:16:33 +00:00
|
|
|
* Compare all fields that should not differ in alternate super block.
|
1994-05-26 06:35:07 +00:00
|
|
|
* When an alternate super-block is specified this check is skipped.
|
|
|
|
*/
|
2017-08-07 21:23:59 +00:00
|
|
|
if (bflag)
|
|
|
|
goto out;
|
1994-05-26 06:35:07 +00:00
|
|
|
getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
|
|
|
|
if (asblk.b_errs)
|
|
|
|
return (0);
|
2017-08-07 21:23:59 +00:00
|
|
|
bad = 0;
|
|
|
|
#define CHK(x, y) \
|
|
|
|
if (altsblock.x != sblock.x) { \
|
|
|
|
bad++; \
|
|
|
|
if (listerr && debug) \
|
|
|
|
printf("SUPER BLOCK VS ALTERNATE MISMATCH %s: " y " vs " y "\n", \
|
|
|
|
#x, (intmax_t)sblock.x, (intmax_t)altsblock.x); \
|
|
|
|
}
|
|
|
|
CHK(fs_sblkno, "%jd");
|
|
|
|
CHK(fs_cblkno, "%jd");
|
|
|
|
CHK(fs_iblkno, "%jd");
|
|
|
|
CHK(fs_dblkno, "%jd");
|
|
|
|
CHK(fs_ncg, "%jd");
|
|
|
|
CHK(fs_bsize, "%jd");
|
|
|
|
CHK(fs_fsize, "%jd");
|
|
|
|
CHK(fs_frag, "%jd");
|
|
|
|
CHK(fs_bmask, "%#jx");
|
|
|
|
CHK(fs_fmask, "%#jx");
|
|
|
|
CHK(fs_bshift, "%jd");
|
|
|
|
CHK(fs_fshift, "%jd");
|
|
|
|
CHK(fs_fragshift, "%jd");
|
|
|
|
CHK(fs_fsbtodb, "%jd");
|
|
|
|
CHK(fs_sbsize, "%jd");
|
|
|
|
CHK(fs_nindir, "%jd");
|
|
|
|
CHK(fs_inopb, "%jd");
|
|
|
|
CHK(fs_cssize, "%jd");
|
|
|
|
CHK(fs_ipg, "%jd");
|
|
|
|
CHK(fs_fpg, "%jd");
|
|
|
|
CHK(fs_magic, "%#jx");
|
|
|
|
#undef CHK
|
|
|
|
if (bad) {
|
2017-08-07 21:23:54 +00:00
|
|
|
if (listerr == 0)
|
|
|
|
return (0);
|
|
|
|
if (preen)
|
|
|
|
printf("%s: ", cdevname);
|
|
|
|
printf(
|
|
|
|
"VALUES IN SUPER BLOCK LSB=%jd DISAGREE WITH THOSE IN\n"
|
2017-08-07 21:23:59 +00:00
|
|
|
"LAST ALTERNATE LSB=%jd\n",
|
2017-08-07 21:23:54 +00:00
|
|
|
sblk.b_bno, asblk.b_bno);
|
|
|
|
if (reply("IGNORE ALTERNATE SUPER BLOCK") == 0)
|
|
|
|
return (0);
|
1994-05-26 06:35:07 +00:00
|
|
|
}
|
2002-12-02 19:30:37 +00:00
|
|
|
out:
|
2002-06-21 06:18:05 +00:00
|
|
|
/*
|
|
|
|
* 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);
|
|
|
|
initbarea(&asblk, BT_SUPERBLK);
|
2013-03-23 20:00:02 +00:00
|
|
|
sblk.b_un.b_buf = Malloc(SBLOCKSIZE);
|
|
|
|
asblk.b_un.b_buf = Malloc(SBLOCKSIZE);
|
2001-04-16 22:22:21 +00:00
|
|
|
if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
|
|
|
|
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
|
|
|
}
|