469 lines
14 KiB
C
469 lines
14 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)setup.c 8.2 (Berkeley) 2/21/94";
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#endif /* not lint */
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#define DKTYPENAMES
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#include <sys/param.h>
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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/disklabel.h>
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#include <sys/file.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "fsck.h"
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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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struct disklabel *getdisklabel();
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setup(dev)
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char *dev;
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{
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long cg, size, asked, i, j;
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long 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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havesb = 0;
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fswritefd = -1;
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if (stat(dev, &statb) < 0) {
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printf("Can't stat %s: %s\n", dev, strerror(errno));
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return (0);
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}
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if ((statb.st_mode & S_IFMT) != S_IFCHR) {
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pfatal("%s is not a character device", dev);
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if (reply("CONTINUE") == 0)
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return (0);
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}
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if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
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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 (preen == 0)
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printf("** %s", dev);
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if (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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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((char *)NULL, fsreadfd))
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dev_bsize = secsize = lp->d_secsize;
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else
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dev_bsize = secsize = DEV_BSIZE;
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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 || calcsb(dev, fsreadfd, &proto) == 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 (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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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 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(8).");
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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 %d\n", bflag);
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bflag = 0;
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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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/*
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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_interleave < 1 ||
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sblock.fs_interleave > sblock.fs_nsect) {
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pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
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sblock.fs_interleave);
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sblock.fs_interleave = 1;
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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_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_inodefmt >= FS_44INODEFMT) {
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newinofmt = 1;
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} else {
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sblock.fs_qbmask = ~sblock.fs_bmask;
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sblock.fs_qfmask = ~sblock.fs_fmask;
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newinofmt = 0;
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}
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/*
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* Convert to new inode format.
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*/
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if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
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if (preen)
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pwarn("CONVERTING TO NEW INODE FORMAT\n");
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else if (!reply("CONVERT TO NEW INODE FORMAT"))
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return(0);
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doinglevel2++;
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sblock.fs_inodefmt = FS_44INODEFMT;
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sizepb = sblock.fs_bsize;
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sblock.fs_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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sblock.fs_maxfilesize += sizepb;
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}
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sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
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sblock.fs_qbmask = ~sblock.fs_bmask;
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sblock.fs_qfmask = ~sblock.fs_fmask;
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sbdirty();
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dirty(&asblk);
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}
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/*
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* Convert to new cylinder group format.
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*/
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if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
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if (preen)
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pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
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else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
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return(0);
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doinglevel1++;
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sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
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sblock.fs_nrpos = 8;
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sblock.fs_postbloff =
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(char *)(&sblock.fs_opostbl[0][0]) -
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(char *)(&sblock.fs_link);
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sblock.fs_rotbloff = &sblock.fs_space[0] -
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(u_char *)(&sblock.fs_link);
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sblock.fs_cgsize =
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fragroundup(&sblock, CGSIZE(&sblock));
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sbdirty();
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dirty(&asblk);
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}
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if (asblk.b_dirty) {
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bcopy((char *)&sblock, (char *)&altsblock,
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(size_t)sblock.fs_sbsize);
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flush(fswritefd, &asblk);
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}
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/*
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* read in the summary info.
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*/
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asked = 0;
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for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
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size = sblock.fs_cssize - i < sblock.fs_bsize ?
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sblock.fs_cssize - i : sblock.fs_bsize;
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sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size);
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if (bread(fsreadfd, (char *)sblock.fs_csp[j],
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fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
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size) != 0 && !asked) {
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pfatal("BAD SUMMARY INFORMATION");
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if (reply("CONTINUE") == 0)
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errexit("");
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asked++;
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}
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}
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/*
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* allocate and initialize the necessary maps
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*/
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bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short));
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blockmap = calloc((unsigned)bmapsize, sizeof (char));
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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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}
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statemap = calloc((unsigned)(maxino + 1), sizeof(char));
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if (statemap == NULL) {
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printf("cannot alloc %u bytes for statemap\n",
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(unsigned)(maxino + 1));
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goto badsb;
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}
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typemap = calloc((unsigned)(maxino + 1), sizeof(char));
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if (typemap == NULL) {
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printf("cannot alloc %u bytes for typemap\n",
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(unsigned)(maxino + 1));
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goto badsb;
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}
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lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short));
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if (lncntp == NULL) {
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printf("cannot alloc %u bytes for lncntp\n",
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(unsigned)(maxino + 1) * sizeof(short));
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goto badsb;
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}
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numdirs = sblock.fs_cstotal.cs_ndir;
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inplast = 0;
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listmax = numdirs + 10;
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inpsort = (struct inoinfo **)calloc((unsigned)listmax,
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sizeof(struct inoinfo *));
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inphead = (struct inoinfo **)calloc((unsigned)numdirs,
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sizeof(struct inoinfo *));
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if (inpsort == NULL || inphead == NULL) {
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printf("cannot alloc %u bytes for inphead\n",
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(unsigned)numdirs * sizeof(struct inoinfo *));
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goto badsb;
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}
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bufinit();
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return (1);
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badsb:
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ckfini();
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return (0);
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}
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/*
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* Read in the super block and its summary info.
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*/
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readsb(listerr)
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int listerr;
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{
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daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
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if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
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return (0);
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sblk.b_bno = super;
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sblk.b_size = SBSIZE;
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/*
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* run a few consistency checks of the super block
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*/
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if (sblock.fs_magic != FS_MAGIC)
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{ badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
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if (sblock.fs_ncg < 1)
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{ badsb(listerr, "NCG OUT OF RANGE"); return (0); }
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if (sblock.fs_cpg < 1)
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{ badsb(listerr, "CPG OUT OF RANGE"); return (0); }
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if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl ||
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(sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl)
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{ badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
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if (sblock.fs_sbsize > SBSIZE)
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{ badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
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/*
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* Compute block size that the filesystem is based on,
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* according to fsbtodb, and adjust superblock block number
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* so we can tell if this is an alternate later.
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*/
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super *= dev_bsize;
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dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
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sblk.b_bno = super / dev_bsize;
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if (bflag) {
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havesb = 1;
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return (1);
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}
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/*
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* Set all possible fields that could differ, then do check
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* of whole super block against an alternate super block.
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* When an alternate super-block is specified this check is skipped.
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*/
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getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
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if (asblk.b_errs)
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return (0);
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altsblock.fs_link = sblock.fs_link;
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altsblock.fs_rlink = sblock.fs_rlink;
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altsblock.fs_time = sblock.fs_time;
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altsblock.fs_cstotal = sblock.fs_cstotal;
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altsblock.fs_cgrotor = sblock.fs_cgrotor;
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altsblock.fs_fmod = sblock.fs_fmod;
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altsblock.fs_clean = sblock.fs_clean;
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altsblock.fs_ronly = sblock.fs_ronly;
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altsblock.fs_flags = sblock.fs_flags;
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altsblock.fs_maxcontig = sblock.fs_maxcontig;
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altsblock.fs_minfree = sblock.fs_minfree;
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altsblock.fs_optim = sblock.fs_optim;
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altsblock.fs_rotdelay = sblock.fs_rotdelay;
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altsblock.fs_maxbpg = sblock.fs_maxbpg;
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bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp,
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sizeof sblock.fs_csp);
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bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt,
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sizeof sblock.fs_fsmnt);
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bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon,
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sizeof sblock.fs_sparecon);
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/*
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* The following should not have to be copied.
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*/
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altsblock.fs_fsbtodb = sblock.fs_fsbtodb;
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altsblock.fs_interleave = sblock.fs_interleave;
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altsblock.fs_npsect = sblock.fs_npsect;
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altsblock.fs_nrpos = sblock.fs_nrpos;
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altsblock.fs_qbmask = sblock.fs_qbmask;
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altsblock.fs_qfmask = sblock.fs_qfmask;
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altsblock.fs_state = sblock.fs_state;
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altsblock.fs_maxfilesize = sblock.fs_maxfilesize;
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if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) {
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badsb(listerr,
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"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
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return (0);
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}
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havesb = 1;
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return (1);
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}
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badsb(listerr, s)
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int listerr;
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char *s;
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{
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if (!listerr)
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return;
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if (preen)
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printf("%s: ", cdevname);
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pfatal("BAD SUPER BLOCK: %s\n", s);
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}
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/*
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* Calculate a prototype superblock based on information in the disk label.
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* When done the cgsblock macro can be calculated and the fs_ncg field
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* can be used. Do NOT attempt to use other macros without verifying that
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* their needed information is available!
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*/
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calcsb(dev, devfd, fs)
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char *dev;
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int devfd;
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register struct fs *fs;
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{
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register struct disklabel *lp;
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register struct partition *pp;
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register char *cp;
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int i;
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cp = index(dev, '\0') - 1;
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if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) {
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pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
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return (0);
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}
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lp = getdisklabel(dev, devfd);
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if (isdigit(*cp))
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pp = &lp->d_partitions[0];
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else
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pp = &lp->d_partitions[*cp - 'a'];
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if (pp->p_fstype != FS_BSDFFS) {
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pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
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dev, pp->p_fstype < FSMAXTYPES ?
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fstypenames[pp->p_fstype] : "unknown");
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return (0);
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}
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bzero((char *)fs, sizeof(struct fs));
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fs->fs_fsize = pp->p_fsize;
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fs->fs_frag = pp->p_frag;
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fs->fs_cpg = pp->p_cpg;
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fs->fs_size = pp->p_size;
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fs->fs_ntrak = lp->d_ntracks;
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fs->fs_nsect = lp->d_nsectors;
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fs->fs_spc = lp->d_secpercyl;
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fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
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fs->fs_sblkno = roundup(
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howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
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fs->fs_frag);
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fs->fs_cgmask = 0xffffffff;
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for (i = fs->fs_ntrak; i > 1; i >>= 1)
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fs->fs_cgmask <<= 1;
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if (!POWEROF2(fs->fs_ntrak))
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fs->fs_cgmask <<= 1;
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fs->fs_cgoffset = roundup(
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howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
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fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
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fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg);
|
|
for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
|
|
fs->fs_fsbtodb++;
|
|
dev_bsize = lp->d_secsize;
|
|
return (1);
|
|
}
|
|
|
|
struct disklabel *
|
|
getdisklabel(s, fd)
|
|
char *s;
|
|
int fd;
|
|
{
|
|
static struct disklabel lab;
|
|
|
|
if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
|
|
if (s == NULL)
|
|
return ((struct disklabel *)NULL);
|
|
pwarn("ioctl (GCINFO): %s\n", strerror(errno));
|
|
errexit("%s: can't read disk label\n", s);
|
|
}
|
|
return (&lab);
|
|
}
|