1 files changed, 466 insertions, 0 deletions
diff --git a/sbin/fsck_ifs/setup.c b/sbin/fsck_ifs/setup.c
new file mode 100644
index 000000000000..a32b23cc294d
--- /dev/null
+++ b/sbin/fsck_ifs/setup.c
@@ -0,0 +1,466 @@
+/*
+ * Copyright (c) 1980, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
+#endif /* not lint */
+
+#define DKTYPENAMES
+#include <sys/param.h>
+#include <sys/time.h>
+#include <ufs/ufs/dinode.h>
+#include <ufs/ffs/fs.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/disklabel.h>
+#include <sys/file.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include "fsck.h"
+
+struct bufarea asblk;
+#define altsblock (*asblk.b_un.b_fs)
+#define POWEROF2(num)	(((num) & ((num) - 1)) == 0)
+
+struct	disklabel *getdisklabel();
+
+setup(dev)
+	char *dev;
+{
+	long cg, size, asked, i, j;
+	long bmapsize;
+	struct disklabel *lp;
+	off_t sizepb;
+	struct stat statb;
+	struct fs proto;
+
+	havesb = 0;
+	fswritefd = -1;
+	if (stat(dev, &statb) < 0) {
+		printf("Can't stat %s: %s\n", dev, strerror(errno));
+		return (0);
+	}
+	if ((statb.st_mode & S_IFMT) != S_IFCHR) {
+		pfatal("%s is not a character device", dev);
+		if (reply("CONTINUE") == 0)
+			return (0);
+	}
+	if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
+		printf("Can't open %s: %s\n", dev, strerror(errno));
+		return (0);
+	}
+	if (preen == 0)
+		printf("** %s", dev);
+	if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
+		fswritefd = -1;
+		if (preen)
+			pfatal("NO WRITE ACCESS");
+		printf(" (NO WRITE)");
+	}
+	if (preen == 0)
+		printf("\n");
+	fsmodified = 0;
+	lfdir = 0;
+	initbarea(&sblk);
+	initbarea(&asblk);
+	sblk.b_un.b_buf = malloc(SBSIZE);
+	asblk.b_un.b_buf = malloc(SBSIZE);
+	if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
+		errexit("cannot allocate space for superblock\n");
+	if (lp = getdisklabel((char *)NULL, fsreadfd))
+		dev_bsize = secsize = lp->d_secsize;
+	else
+		dev_bsize = secsize = DEV_BSIZE;
+	/*
+	 * Read in the superblock, looking for alternates if necessary
+	 */
+	if (readsb(1) == 0) {
+		if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
+			return(0);
+		if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
+			return (0);
+		for (cg = 0; cg < proto.fs_ncg; cg++) {
+			bflag = fsbtodb(&proto, cgsblock(&proto, cg));
+			if (readsb(0) != 0)
+				break;
+		}
+		if (cg >= proto.fs_ncg) {
+			printf("%s %s\n%s %s\n%s %s\n",
+				"SEARCH FOR ALTERNATE SUPER-BLOCK",
+				"FAILED. YOU MUST USE THE",
+				"-b OPTION TO FSCK TO SPECIFY THE",
+				"LOCATION OF AN ALTERNATE",
+				"SUPER-BLOCK TO SUPPLY NEEDED",
+				"INFORMATION; SEE fsck(8).");
+			return(0);
+		}
+		pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
+	}
+	maxfsblock = sblock.fs_size;
+	maxino = sblock.fs_ncg * sblock.fs_ipg;
+	/*
+	 * Check and potentially fix certain fields in the super block.
+	 */
+	if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
+		pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
+		if (reply("SET TO DEFAULT") == 1) {
+			sblock.fs_optim = FS_OPTTIME;
+			sbdirty();
+		}
+	}
+	if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
+		pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
+			sblock.fs_minfree);
+		if (reply("SET TO DEFAULT") == 1) {
+			sblock.fs_minfree = 10;
+			sbdirty();
+		}
+	}
+	if (sblock.fs_interleave < 1 || 
+	    sblock.fs_interleave > sblock.fs_nsect) {
+		pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
+			sblock.fs_interleave);
+		sblock.fs_interleave = 1;
+		if (preen)
+			printf(" (FIXED)\n");
+		if (preen || reply("SET TO DEFAULT") == 1) {
+			sbdirty();
+			dirty(&asblk);
+		}
+	}
+	if (sblock.fs_npsect < sblock.fs_nsect || 
+	    sblock.fs_npsect > sblock.fs_nsect*2) {
+		pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
+			sblock.fs_npsect);
+		sblock.fs_npsect = sblock.fs_nsect;
+		if (preen)
+			printf(" (FIXED)\n");
+		if (preen || reply("SET TO DEFAULT") == 1) {
+			sbdirty();
+			dirty(&asblk);
+		}
+	}
+	if (sblock.fs_inodefmt >= FS_44INODEFMT) {
+		newinofmt = 1;
+	} else {
+		sblock.fs_qbmask = ~sblock.fs_bmask;
+		sblock.fs_qfmask = ~sblock.fs_fmask;
+		newinofmt = 0;
+	}
+	/*
+	 * Convert to new inode format.
+	 */
+	if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
+		if (preen)
+			pwarn("CONVERTING TO NEW INODE FORMAT\n");
+		else if (!reply("CONVERT TO NEW INODE FORMAT"))
+			return(0);
+		doinglevel2++;
+		sblock.fs_inodefmt = FS_44INODEFMT;
+		sizepb = sblock.fs_bsize;
+		sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
+		for (i = 0; i < NIADDR; i++) {
+			sizepb *= NINDIR(&sblock);
+			sblock.fs_maxfilesize += sizepb;
+		}
+		sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
+		sblock.fs_qbmask = ~sblock.fs_bmask;
+		sblock.fs_qfmask = ~sblock.fs_fmask;
+		sbdirty();
+		dirty(&asblk);
+	}
+	/*
+	 * Convert to new cylinder group format.
+	 */
+	if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
+		if (preen)
+			pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
+		else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
+			return(0);
+		doinglevel1++;
+		sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
+		sblock.fs_nrpos = 8;
+		sblock.fs_postbloff =
+		    (char *)(&sblock.fs_opostbl[0][0]) -
+		    (char *)(&sblock.fs_link);
+		sblock.fs_rotbloff = &sblock.fs_space[0] -
+		    (u_char *)(&sblock.fs_link);
+		sblock.fs_cgsize =
+			fragroundup(&sblock, CGSIZE(&sblock));
+		sbdirty();
+		dirty(&asblk);
+	}
+	if (asblk.b_dirty) {
+		bcopy((char *)&sblock, (char *)&altsblock,
+			(size_t)sblock.fs_sbsize);
+		flush(fswritefd, &asblk);
+	}
+	/*
+	 * read in the summary info.
+	 */
+	asked = 0;
+	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;
+		sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size);
+		if (bread(fsreadfd, (char *)sblock.fs_csp[j],
+		    fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
+		    size) != 0 && !asked) {
+			pfatal("BAD SUMMARY INFORMATION");
+			if (reply("CONTINUE") == 0)
+				errexit("");
+			asked++;
+		}
+	}
+	/*
+	 * allocate and initialize the necessary maps
+	 */
+	bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short));
+	blockmap = calloc((unsigned)bmapsize, sizeof (char));
+	if (blockmap == NULL) {
+		printf("cannot alloc %u bytes for blockmap\n",
+		    (unsigned)bmapsize);
+		goto badsb;
+	}
+	statemap = calloc((unsigned)(maxino + 1), sizeof(char));
+	if (statemap == NULL) {
+		printf("cannot alloc %u bytes for statemap\n",
+		    (unsigned)(maxino + 1));
+		goto badsb;
+	}
+	typemap = calloc((unsigned)(maxino + 1), sizeof(char));
+	if (typemap == NULL) {
+		printf("cannot alloc %u bytes for typemap\n",
+		    (unsigned)(maxino + 1));
+		goto badsb;
+	}
+	lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short));
+	if (lncntp == NULL) {
+		printf("cannot alloc %u bytes for lncntp\n", 
+		    (unsigned)(maxino + 1) * sizeof(short));
+		goto badsb;
+	}
+	numdirs = sblock.fs_cstotal.cs_ndir;
+	inplast = 0;
+	listmax = numdirs + 10;
+	inpsort = (struct inoinfo **)calloc((unsigned)listmax,
+	    sizeof(struct inoinfo *));
+	inphead = (struct inoinfo **)calloc((unsigned)numdirs,
+	    sizeof(struct inoinfo *));
+	if (inpsort == NULL || inphead == NULL) {
+		printf("cannot alloc %u bytes for inphead\n", 
+		    (unsigned)numdirs * sizeof(struct inoinfo *));
+		goto badsb;
+	}
+	bufinit();
+	return (1);
+
+badsb:
+	ckfini();
+	return (0);
+}
+
+/*
+ * Read in the super block and its summary info.
+ */
+readsb(listerr)
+	int listerr;
+{
+	daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
+
+	if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
+		return (0);
+	sblk.b_bno = super;
+	sblk.b_size = SBSIZE;
+	/*
+	 * run a few consistency checks of the super block
+	 */
+	if (sblock.fs_magic != FS_MAGIC)
+		{ badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
+	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_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, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
+	/*
+	 * Compute block size that the filesystem is based on,
+	 * according to fsbtodb, and adjust superblock block number
+	 * so we can tell if this is an alternate later.
+	 */
+	super *= dev_bsize;
+	dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
+	sblk.b_bno = super / dev_bsize;
+	if (bflag) {
+		havesb = 1;
+		return (1);
+	}
+	/*
+	 * Set all possible fields that could differ, then do check
+	 * of whole super block against an alternate super block.
+	 * When an alternate super-block is specified this check is skipped.
+	 */
+	getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
+	if (asblk.b_errs)
+		return (0);
+	altsblock.fs_link = sblock.fs_link;
+	altsblock.fs_rlink = sblock.fs_rlink;
+	altsblock.fs_time = sblock.fs_time;
+	altsblock.fs_cstotal = sblock.fs_cstotal;
+	altsblock.fs_cgrotor = sblock.fs_cgrotor;
+	altsblock.fs_fmod = sblock.fs_fmod;
+	altsblock.fs_clean = sblock.fs_clean;
+	altsblock.fs_ronly = sblock.fs_ronly;
+	altsblock.fs_flags = sblock.fs_flags;
+	altsblock.fs_maxcontig = sblock.fs_maxcontig;
+	altsblock.fs_minfree = sblock.fs_minfree;
+	altsblock.fs_optim = sblock.fs_optim;
+	altsblock.fs_rotdelay = sblock.fs_rotdelay;
+	altsblock.fs_maxbpg = sblock.fs_maxbpg;
+	bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp,
+		sizeof sblock.fs_csp);
+	bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt,
+		sizeof sblock.fs_fsmnt);
+	bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon,
+		sizeof sblock.fs_sparecon);
+	/*
+	 * The following should not have to be copied.
+	 */
+	altsblock.fs_fsbtodb = sblock.fs_fsbtodb;
+	altsblock.fs_interleave = sblock.fs_interleave;
+	altsblock.fs_npsect = sblock.fs_npsect;
+	altsblock.fs_nrpos = sblock.fs_nrpos;
+	altsblock.fs_qbmask = sblock.fs_qbmask;
+	altsblock.fs_qfmask = sblock.fs_qfmask;
+	altsblock.fs_state = sblock.fs_state;
+	altsblock.fs_maxfilesize = sblock.fs_maxfilesize;
+	if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) {
+		badsb(listerr,
+		"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
+		return (0);
+	}
+	havesb = 1;
+	return (1);
+}
+
+badsb(listerr, s)
+	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!
+ */
+calcsb(dev, devfd, fs)
+	char *dev;
+	int devfd;
+	register struct fs *fs;
+{
+	register struct disklabel *lp;
+	register struct partition *pp;
+	register char *cp;
+	int i;
+
+	cp = index(dev, '\0') - 1;
+	if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) {
+		pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
+		return (0);
+	}
+	lp = getdisklabel(dev, devfd);
+	if (isdigit(*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);
+	}
+	bzero((char *)fs, sizeof(struct fs));
+	fs->fs_fsize = pp->p_fsize;
+	fs->fs_frag = pp->p_frag;
+	fs->fs_cpg = pp->p_cpg;
+	fs->fs_size = pp->p_size;
+	fs->fs_ntrak = lp->d_ntracks;
+	fs->fs_nsect = lp->d_nsectors;
+	fs->fs_spc = lp->d_secpercyl;
+	fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
+	fs->fs_sblkno = roundup(
+		howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
+		fs->fs_frag);
+	fs->fs_cgmask = 0xffffffff;
+	for (i = fs->fs_ntrak; i > 1; i >>= 1)
+		fs->fs_cgmask <<= 1;
+	if (!POWEROF2(fs->fs_ntrak))
+		fs->fs_cgmask <<= 1;
+	fs->fs_cgoffset = roundup(
+		howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
+	fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
+	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);
+}