712 lines
19 KiB
C
712 lines
19 KiB
C
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/* $OpenBSD: setup.c,v 1.69 2022/09/01 13:37:57 krw Exp $ */
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/* $NetBSD: setup.c,v 1.27 1996/09/27 22:45:19 christos Exp $ */
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/*
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h> /* MAXBSIZE DEV_BSIZE roundup */
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#define DKTYPENAMES
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#include <sys/time.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/dkio.h>
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#include <sys/disklabel.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <util.h>
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#include <limits.h>
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#include <ctype.h>
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#include <err.h>
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#include "fsck.h"
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#include "extern.h"
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#include "fsutil.h"
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#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
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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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void badsb(int, char *);
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int calcsb(char *, int, struct fs *, struct disklabel *, uint32_t);
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static struct disklabel *getdisklabel(char *, int);
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static int readsb(int);
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static int cmpsb(struct fs *, struct fs *);
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static char rdevname[PATH_MAX];
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long numdirs, listmax, inplast;
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/*
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* Possible locations for the superblock.
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*/
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static const int sbtry[] = SBLOCKSEARCH;
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/* locations the 1st alternate sb can be at */
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static const int altsbtry[] = { 32, 64, 128, 144, 160, 192, 256 };
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int
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setup(char *dev, int isfsdb)
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{
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long size, asked, i, j;
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size_t bmapsize;
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struct disklabel *lp;
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off_t sizepb;
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struct stat statb;
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struct fs proto;
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int doskipclean;
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int32_t maxsymlinklen, nindir;
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uint32_t cg, inopb;
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u_int64_t maxfilesize;
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char *realdev;
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havesb = 0;
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fswritefd = fsreadfd = -1;
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doskipclean = skipclean;
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if ((fsreadfd = opendev(dev, O_RDONLY, 0, &realdev)) == -1) {
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printf("Can't open %s: %s\n", dev, strerror(errno));
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return (0);
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}
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if (strncmp(dev, realdev, PATH_MAX) != 0) {
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blockcheck(unrawname(realdev));
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strlcpy(rdevname, realdev, sizeof(rdevname));
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setcdevname(rdevname, dev, preen);
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if (isfsdb || !hotroot()) {
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if (unveil("/dev", "rw") == -1)
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err(1, "unveil /dev");
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if (pledge("stdio rpath wpath getpw tty disklabel",
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NULL) == -1)
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err(1, "pledge");
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}
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}
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if (fstat(fsreadfd, &statb) == -1) {
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printf("Can't stat %s: %s\n", realdev, strerror(errno));
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close(fsreadfd);
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return (0);
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}
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if (!S_ISCHR(statb.st_mode)) {
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pfatal("%s is not a character device", realdev);
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if (reply("CONTINUE") == 0) {
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close(fsreadfd);
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return (0);
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}
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}
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if (preen == 0) {
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printf("** %s", realdev);
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if (strncmp(dev, realdev, PATH_MAX) != 0)
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printf(" (%s)", dev);
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}
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if (nflag || (fswritefd = opendev(dev, O_WRONLY, 0, NULL)) == -1) {
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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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fsmodified = 0;
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lfdir = 0;
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initbarea(&sblk);
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initbarea(&asblk);
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sblk.b_un.b_buf = malloc(SBSIZE);
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asblk.b_un.b_buf = malloc(SBSIZE);
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if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
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errexit("cannot allocate space for superblock\n");
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if ((lp = getdisklabel(NULL, fsreadfd)) != NULL)
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secsize = lp->d_secsize;
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else
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secsize = DEV_BSIZE;
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if (isfsdb) {
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if (pledge("stdio rpath getpw tty", NULL) == -1)
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err(1, "pledge");
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} else if (!hotroot()) {
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#ifndef SMALL
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if (pledge("stdio getpw", NULL) == -1)
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err(1, "pledge");
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#else
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if (pledge("stdio", NULL) == -1)
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err(1, "pledge");
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#endif
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}
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/*
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* Read in the superblock, looking for alternates if necessary
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*/
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if (readsb(1) == 0) {
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if (bflag || preen ||
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calcsb(realdev, fsreadfd, &proto, lp, SBLOCK_UFS1) == 0)
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return(0);
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if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
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return (0);
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for (i = 0; i < sizeof(altsbtry) / sizeof(altsbtry[0]); i++) {
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bflag = altsbtry[i];
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/* proto partially setup by calcsb */
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if (readsb(0) != 0 &&
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proto.fs_fsize == sblock.fs_fsize &&
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proto.fs_bsize == sblock.fs_bsize)
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goto found;
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}
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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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proto.fs_fsize == sblock.fs_fsize &&
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proto.fs_bsize == sblock.fs_bsize)
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goto found;
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}
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calcsb(realdev, fsreadfd, &proto, lp, SBLOCK_UFS2);
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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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proto.fs_fsize == sblock.fs_fsize &&
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proto.fs_bsize == sblock.fs_bsize)
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goto found;
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}
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if (cg >= proto.fs_ncg) {
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printf("%s %s\n%s %s\n%s %s\n",
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"SEARCH FOR ALTERNATE SUPER-BLOCK",
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"FAILED. YOU MUST USE THE",
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"-b OPTION TO FSCK_FFS TO SPECIFY THE",
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"LOCATION OF AN ALTERNATE",
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"SUPER-BLOCK TO SUPPLY NEEDED",
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"INFORMATION; SEE fsck_ffs(8).");
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return(0);
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}
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found:
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doskipclean = 0;
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pwarn("USING ALTERNATE SUPERBLOCK AT %lld\n", (long long)bflag);
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}
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if (debug)
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printf("clean = %d\n", sblock.fs_clean);
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if (sblock.fs_clean & FS_ISCLEAN) {
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if (doskipclean) {
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pwarn("%sile system is clean; not checking\n",
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preen ? "f" : "** F");
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return (-1);
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}
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if (!preen)
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pwarn("** File system is already clean\n");
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}
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maxfsblock = sblock.fs_size;
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maxino = sblock.fs_ncg * sblock.fs_ipg;
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sizepb = sblock.fs_bsize;
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maxfilesize = sblock.fs_bsize * NDADDR - 1;
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for (i = 0; i < NIADDR; i++) {
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sizepb *= NINDIR(&sblock);
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maxfilesize += sizepb;
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}
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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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}
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if (sblock.fs_npsect < sblock.fs_nsect ||
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sblock.fs_npsect > sblock.fs_nsect*2) {
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pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
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sblock.fs_npsect);
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sblock.fs_npsect = sblock.fs_nsect;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("SET TO DEFAULT") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_bmask != ~(sblock.fs_bsize - 1)) {
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pwarn("INCORRECT BMASK=%x IN SUPERBLOCK",
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sblock.fs_bmask);
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sblock.fs_bmask = ~(sblock.fs_bsize - 1);
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_fmask != ~(sblock.fs_fsize - 1)) {
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pwarn("INCORRECT FMASK=%x IN SUPERBLOCK",
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sblock.fs_fmask);
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sblock.fs_fmask = ~(sblock.fs_fsize - 1);
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (1 << sblock.fs_bshift != sblock.fs_bsize) {
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pwarn("INCORRECT BSHIFT=%d IN SUPERBLOCK", sblock.fs_bshift);
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sblock.fs_bshift = ffs(sblock.fs_bsize) - 1;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (1 << sblock.fs_fshift != sblock.fs_fsize) {
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pwarn("INCORRECT FSHIFT=%d IN SUPERBLOCK", sblock.fs_fshift);
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sblock.fs_fshift = ffs(sblock.fs_fsize) - 1;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_inodefmt < FS_44INODEFMT) {
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pwarn("Format of filesystem is too old.\n");
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pwarn("Must update to modern format using a version of fsck\n");
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pfatal("from before release 5.0 with the command ``fsck -c 2''\n");
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exit(8);
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}
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if (sblock.fs_maxfilesize != maxfilesize) {
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pwarn("INCORRECT MAXFILESIZE=%llu IN SUPERBLOCK",
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(unsigned long long)sblock.fs_maxfilesize);
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sblock.fs_maxfilesize = maxfilesize;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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maxsymlinklen = sblock.fs_magic == FS_UFS1_MAGIC ?
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MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2;
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if (sblock.fs_maxsymlinklen != maxsymlinklen) {
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pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK",
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sblock.fs_maxsymlinklen);
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sblock.fs_maxsymlinklen = maxsymlinklen;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_qbmask != ~sblock.fs_bmask) {
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pwarn("INCORRECT QBMASK=%lx IN SUPERBLOCK",
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(unsigned long)sblock.fs_qbmask);
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sblock.fs_qbmask = ~sblock.fs_bmask;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_qfmask != ~sblock.fs_fmask) {
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pwarn("INCORRECT QFMASK=%lx IN SUPERBLOCK",
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(unsigned long)sblock.fs_qfmask);
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sblock.fs_qfmask = ~sblock.fs_fmask;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_cgsize != fragroundup(&sblock, CGSIZE(&sblock))) {
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pwarn("INCONSISTENT CGSIZE=%d\n", sblock.fs_cgsize);
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sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock));
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_magic == FS_UFS2_MAGIC)
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inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode);
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else
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inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode);
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if (INOPB(&sblock) != inopb) {
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pwarn("INCONSISTENT INOPB=%u\n", INOPB(&sblock));
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sblock.fs_inopb = inopb;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.fs_magic == FS_UFS2_MAGIC)
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nindir = sblock.fs_bsize / sizeof(int64_t);
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else
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nindir = sblock.fs_bsize / sizeof(int32_t);
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if (NINDIR(&sblock) != nindir) {
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pwarn("INCONSISTENT NINDIR=%d\n", NINDIR(&sblock));
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sblock.fs_nindir = nindir;
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if (preen)
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printf(" (FIXED)\n");
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if (preen || reply("FIX") == 1) {
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sbdirty();
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dirty(&asblk);
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}
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}
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if (asblk.b_dirty && !bflag) {
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||
|
memcpy(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
|
||
|
flush(fswritefd, &asblk);
|
||
|
}
|
||
|
/*
|
||
|
* read in the summary info.
|
||
|
*/
|
||
|
asked = 0;
|
||
|
sblock.fs_csp = calloc(1, sblock.fs_cssize);
|
||
|
if (sblock.fs_csp == NULL) {
|
||
|
printf("cannot alloc %u bytes for cylinder group summary area\n",
|
||
|
(unsigned)sblock.fs_cssize);
|
||
|
goto badsblabel;
|
||
|
}
|
||
|
for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
|
||
|
size = sblock.fs_cssize - i < sblock.fs_bsize ?
|
||
|
sblock.fs_cssize - i : sblock.fs_bsize;
|
||
|
if (bread(fsreadfd, (char *)sblock.fs_csp + i,
|
||
|
fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
|
||
|
size) != 0 && !asked) {
|
||
|
pfatal("BAD SUMMARY INFORMATION");
|
||
|
if (reply("CONTINUE") == 0) {
|
||
|
ckfini(0);
|
||
|
errexit("%s", "");
|
||
|
}
|
||
|
asked++;
|
||
|
}
|
||
|
}
|
||
|
/*
|
||
|
* allocate and initialize the necessary maps
|
||
|
*/
|
||
|
bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t));
|
||
|
blockmap = calloc(bmapsize, sizeof(char));
|
||
|
if (blockmap == NULL) {
|
||
|
printf("cannot alloc %zu bytes for blockmap\n", bmapsize);
|
||
|
goto badsblabel;
|
||
|
}
|
||
|
inostathead = calloc((unsigned)(sblock.fs_ncg),
|
||
|
sizeof(struct inostatlist));
|
||
|
if (inostathead == NULL) {
|
||
|
printf("cannot alloc %zu bytes for inostathead\n",
|
||
|
(unsigned)sblock.fs_ncg * sizeof(struct inostatlist));
|
||
|
goto badsblabel;
|
||
|
}
|
||
|
numdirs = MAXIMUM(sblock.fs_cstotal.cs_ndir, 128);
|
||
|
inplast = 0;
|
||
|
listmax = numdirs + 10;
|
||
|
inpsort = calloc((unsigned)listmax, sizeof(struct inoinfo *));
|
||
|
if (inpsort == NULL) {
|
||
|
printf("cannot alloc %zu bytes for inpsort\n",
|
||
|
(unsigned)listmax * sizeof(struct inoinfo *));
|
||
|
goto badsblabel;
|
||
|
}
|
||
|
inphead = calloc((unsigned)numdirs, sizeof(struct inoinfo *));
|
||
|
if (inphead == NULL) {
|
||
|
printf("cannot alloc %zu bytes for inphead\n",
|
||
|
(unsigned)numdirs * sizeof(struct inoinfo *));
|
||
|
goto badsblabel;
|
||
|
}
|
||
|
bufinit();
|
||
|
if (sblock.fs_flags & FS_DOSOFTDEP)
|
||
|
usedsoftdep = 1;
|
||
|
else
|
||
|
usedsoftdep = 0;
|
||
|
return (1);
|
||
|
|
||
|
badsblabel:
|
||
|
ckfini(0);
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Read in the super block and its summary info.
|
||
|
*/
|
||
|
static int
|
||
|
readsb(int listerr)
|
||
|
{
|
||
|
daddr_t super = 0;
|
||
|
int i;
|
||
|
|
||
|
if (bflag) {
|
||
|
super = bflag;
|
||
|
|
||
|
if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
|
||
|
return (0);
|
||
|
|
||
|
if (sblock.fs_magic != FS_UFS1_MAGIC &&
|
||
|
sblock.fs_magic != FS_UFS2_MAGIC) {
|
||
|
badsb(listerr, "MAGIC NUMBER WRONG");
|
||
|
return (0);
|
||
|
}
|
||
|
} else {
|
||
|
for (i = 0; sbtry[i] != -1; i++) {
|
||
|
super = sbtry[i] / DEV_BSIZE;
|
||
|
|
||
|
if (bread(fsreadfd, (char *)&sblock, super,
|
||
|
(long)SBSIZE) != 0)
|
||
|
return (0);
|
||
|
|
||
|
if (sblock.fs_magic != FS_UFS1_MAGIC &&
|
||
|
sblock.fs_magic != FS_UFS2_MAGIC)
|
||
|
continue; /* Not a superblock */
|
||
|
|
||
|
/*
|
||
|
* Do not look for an FFS1 file system at SBLOCK_UFS2.
|
||
|
* Doing so will find the wrong super-block for file
|
||
|
* systems with 64k block size.
|
||
|
*/
|
||
|
if (sblock.fs_magic == FS_UFS1_MAGIC &&
|
||
|
sbtry[i] == SBLOCK_UFS2)
|
||
|
continue;
|
||
|
|
||
|
if (sblock.fs_magic == FS_UFS2_MAGIC &&
|
||
|
sblock.fs_sblockloc != sbtry[i])
|
||
|
continue; /* Not a superblock */
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (sbtry[i] == -1) {
|
||
|
badsb(listerr, "MAGIC NUMBER WRONG");
|
||
|
return (0);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
sblk.b_bno = super;
|
||
|
sblk.b_size = SBSIZE;
|
||
|
|
||
|
/*
|
||
|
* run a few consistency checks of the super block
|
||
|
*/
|
||
|
if (sblock.fs_ncg < 1) {
|
||
|
badsb(listerr, "NCG OUT OF RANGE");
|
||
|
return (0);
|
||
|
}
|
||
|
if (sblock.fs_cpg < 1) {
|
||
|
badsb(listerr, "CPG OUT OF RANGE");
|
||
|
return (0);
|
||
|
}
|
||
|
if (sblock.fs_magic == FS_UFS1_MAGIC) {
|
||
|
if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl ||
|
||
|
(sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) {
|
||
|
badsb(listerr, "NCYL LESS THAN NCG*CPG");
|
||
|
return (0);
|
||
|
}
|
||
|
}
|
||
|
if (sblock.fs_sbsize > SBSIZE) {
|
||
|
badsb(listerr, "SBSIZE PREPOSTEROUSLY LARGE");
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
if (!POWEROF2(sblock.fs_bsize) || sblock.fs_bsize < MINBSIZE ||
|
||
|
sblock.fs_bsize > MAXBSIZE) {
|
||
|
badsb(listerr, "ILLEGAL BLOCK SIZE IN SUPERBLOCK");
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
if (!POWEROF2(sblock.fs_fsize) || sblock.fs_fsize > sblock.fs_bsize ||
|
||
|
sblock.fs_fsize < sblock.fs_bsize / MAXFRAG) {
|
||
|
badsb(listerr, "ILLEGAL FRAGMENT SIZE IN SUPERBLOCK");
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
if (bflag)
|
||
|
goto out;
|
||
|
getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
|
||
|
if (asblk.b_errs)
|
||
|
return (0);
|
||
|
if (cmpsb(&sblock, &altsblock)) {
|
||
|
if (debug) {
|
||
|
long *nlp, *olp, *endlp;
|
||
|
|
||
|
printf("superblock mismatches\n");
|
||
|
nlp = (long *)&altsblock;
|
||
|
olp = (long *)&sblock;
|
||
|
endlp = olp + (sblock.fs_sbsize / sizeof *olp);
|
||
|
for ( ; olp < endlp; olp++, nlp++) {
|
||
|
if (*olp == *nlp)
|
||
|
continue;
|
||
|
printf("offset %d, original %ld, alternate %ld\n",
|
||
|
(int)(olp - (long *)&sblock), *olp, *nlp);
|
||
|
}
|
||
|
}
|
||
|
badsb(listerr,
|
||
|
"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN LAST ALTERNATE");
|
||
|
return (0);
|
||
|
}
|
||
|
out:
|
||
|
if (sblock.fs_magic == FS_UFS1_MAGIC) {
|
||
|
sblock.fs_time = sblock.fs_ffs1_time;
|
||
|
sblock.fs_size = sblock.fs_ffs1_size;
|
||
|
sblock.fs_dsize = sblock.fs_ffs1_dsize;
|
||
|
sblock.fs_csaddr = sblock.fs_ffs1_csaddr;
|
||
|
sblock.fs_cstotal.cs_ndir = sblock.fs_ffs1_cstotal.cs_ndir;
|
||
|
sblock.fs_cstotal.cs_nbfree = sblock.fs_ffs1_cstotal.cs_nbfree;
|
||
|
sblock.fs_cstotal.cs_nifree = sblock.fs_ffs1_cstotal.cs_nifree;
|
||
|
sblock.fs_cstotal.cs_nffree = sblock.fs_ffs1_cstotal.cs_nffree;
|
||
|
}
|
||
|
havesb = 1;
|
||
|
return (1);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
badsb(int listerr, char *s)
|
||
|
{
|
||
|
|
||
|
if (!listerr)
|
||
|
return;
|
||
|
if (preen)
|
||
|
printf("%s: ", cdevname());
|
||
|
pfatal("BAD SUPER BLOCK: %s\n", s);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Calculate a prototype superblock based on information in the disk label.
|
||
|
* 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!
|
||
|
*/
|
||
|
int
|
||
|
calcsb(char *dev, int devfd, struct fs *fs, struct disklabel *lp,
|
||
|
uint32_t sblockloc)
|
||
|
{
|
||
|
struct partition *pp;
|
||
|
char *cp;
|
||
|
int i;
|
||
|
|
||
|
cp = strchr(dev, '\0');
|
||
|
if ((cp == NULL || (cp[-1] < 'a' || cp[-1] >= 'a' + MAXPARTITIONS)) &&
|
||
|
!isdigit((unsigned char)cp[-1])) {
|
||
|
pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
|
||
|
return (0);
|
||
|
}
|
||
|
cp--;
|
||
|
if (lp == NULL)
|
||
|
pfatal("%s: CANNOT READ DISKLABEL\n", dev);
|
||
|
if (isdigit((unsigned char)*cp))
|
||
|
pp = &lp->d_partitions[0];
|
||
|
else
|
||
|
pp = &lp->d_partitions[*cp - 'a'];
|
||
|
if (pp->p_fstype != FS_BSDFFS) {
|
||
|
pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
|
||
|
dev, pp->p_fstype < FSMAXTYPES ?
|
||
|
fstypenames[pp->p_fstype] : "unknown");
|
||
|
return (0);
|
||
|
}
|
||
|
memset(fs, 0, sizeof(struct fs));
|
||
|
fs->fs_fsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock);
|
||
|
fs->fs_frag = DISKLABELV1_FFS_FRAG(pp->p_fragblock);
|
||
|
fs->fs_fpg = pp->p_cpg * fs->fs_frag;
|
||
|
fs->fs_bsize = fs->fs_fsize * fs->fs_frag;
|
||
|
fs->fs_nspf = DL_SECTOBLK(lp, fs->fs_fsize / lp->d_secsize);
|
||
|
for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
|
||
|
fs->fs_fsbtodb++;
|
||
|
/*
|
||
|
* fs->fs_size is in fragments, DL_GETPSIZE() is in disk sectors
|
||
|
* and fs_nspf is in DEV_BSIZE blocks. Shake well.
|
||
|
*/
|
||
|
fs->fs_size = DL_SECTOBLK(lp, DL_GETPSIZE(pp)) / fs->fs_nspf;
|
||
|
fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg);
|
||
|
fs->fs_sblkno = roundup(
|
||
|
howmany(sblockloc + SBSIZE, fs->fs_fsize),
|
||
|
fs->fs_frag);
|
||
|
|
||
|
return (1);
|
||
|
}
|
||
|
|
||
|
static struct disklabel *
|
||
|
getdisklabel(char *s, int fd)
|
||
|
{
|
||
|
static struct disklabel lab;
|
||
|
|
||
|
if (ioctl(fd, DIOCGDINFO, (char *)&lab) == -1) {
|
||
|
if (s == NULL)
|
||
|
return (NULL);
|
||
|
pwarn("ioctl (GCINFO): %s\n", strerror(errno));
|
||
|
errexit("%s: can't read disk label\n", s);
|
||
|
}
|
||
|
return (&lab);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Compare two superblocks
|
||
|
*/
|
||
|
static int
|
||
|
cmpsb(struct fs *sb, struct fs *asb)
|
||
|
{
|
||
|
/*
|
||
|
* Only compare fields which should be the same, and ignore ones
|
||
|
* likely to change to ensure future compatibility.
|
||
|
*/
|
||
|
if (asb->fs_sblkno != sb->fs_sblkno ||
|
||
|
asb->fs_cblkno != sb->fs_cblkno ||
|
||
|
asb->fs_iblkno != sb->fs_iblkno ||
|
||
|
asb->fs_dblkno != sb->fs_dblkno ||
|
||
|
asb->fs_cgoffset != sb->fs_cgoffset ||
|
||
|
asb->fs_cgmask != sb->fs_cgmask ||
|
||
|
asb->fs_ncg != sb->fs_ncg ||
|
||
|
asb->fs_bsize != sb->fs_bsize ||
|
||
|
asb->fs_fsize != sb->fs_fsize ||
|
||
|
asb->fs_frag != sb->fs_frag ||
|
||
|
asb->fs_bmask != sb->fs_bmask ||
|
||
|
asb->fs_fmask != sb->fs_fmask ||
|
||
|
asb->fs_bshift != sb->fs_bshift ||
|
||
|
asb->fs_fshift != sb->fs_fshift ||
|
||
|
asb->fs_fragshift != sb->fs_fragshift ||
|
||
|
asb->fs_fsbtodb != sb->fs_fsbtodb ||
|
||
|
asb->fs_sbsize != sb->fs_sbsize ||
|
||
|
asb->fs_nindir != sb->fs_nindir ||
|
||
|
asb->fs_inopb != sb->fs_inopb ||
|
||
|
asb->fs_cssize != sb->fs_cssize ||
|
||
|
asb->fs_cpg != sb->fs_cpg ||
|
||
|
asb->fs_ipg != sb->fs_ipg ||
|
||
|
asb->fs_fpg != sb->fs_fpg ||
|
||
|
asb->fs_magic != sb->fs_magic)
|
||
|
return (1);
|
||
|
/* they're the same */
|
||
|
return (0);
|
||
|
}
|