[unix-history] / usr / src / sbin / fsck / setup.c

/*
 * Copyright (c) 1980, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)setup.c	8.4 (Berkeley) %G%";
#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) {
			sblock.fs_interleave);
		sblock.fs_interleave = 1;
			sbdirty();
			dirty(&asblk);
		}
	}
	if (sblock.fs_npsect < sblock.fs_nsect || 
	    sblock.fs_npsect > sblock.fs_nsect*2) {
			sblock.fs_npsect);
		sblock.fs_npsect = sblock.fs_nsect;
			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_firstfield);
		sblock.fs_rotbloff = &sblock.fs_space[0] -
		    (u_char *)(&sblock.fs_firstfield);
		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_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_state = sblock.fs_state;
	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);
}
Commit	Line	Data
76797561	1	/*
21e5ab9a KB	2	* Copyright (c) 1980, 1986, 1993
21e5ab9a KB	3	* The Regents of the University of California. All rights reserved.
fe32782c	4	*
70ab3c27	5	* %sccs.include.redist.c%
76797561 DF	6	*/
76797561 DF	7
eb93b62a	8	#ifndef lint
6c3d0366	9	static char sccsid[] = "@(#)setup.c 8.4 (Berkeley) %G%";
fe32782c	10	#endif /* not lint */
eb93b62a	11
c7aed003	12	#define DKTYPENAMES
eb93b62a	13	#include <sys/param.h>
b82067db	14	#include <sys/time.h>
558b3a30 KB	15	#include <ufs/ufs/dinode.h>
558b3a30 KB	16	#include <ufs/ffs/fs.h>
eb93b62a	17	#include <sys/stat.h>
c7aed003 KM	18	#include <sys/ioctl.h>
	19	#include <sys/disklabel.h>
	20	#include <sys/file.h>
d72e970b KM	21	#include <errno.h>
	22	#include <stdlib.h>
	23	#include <string.h>
c7aed003	24	#include <ctype.h>
eb93b62a KM	25	#include "fsck.h"
eb93b62a KM	26
569ec282	27	struct bufarea asblk;
adc5a10c	28	#define altsblock (*asblk.b_un.b_fs)
c7aed003 KM	29	#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
c7aed003 KM	30
d35d4c2b	31	struct disklabel *getdisklabel();
eb93b62a KM	32
	33	setup(dev)
	34	char *dev;
	35	{
569ec282 KM	36	long cg, size, asked, i, j;
569ec282 KM	37	long bmapsize;
d35d4c2b	38	struct disklabel *lp;
53a26cfb	39	off_t sizepb;
eb93b62a	40	struct stat statb;
c7aed003	41	struct fs proto;
eb93b62a	42
55f8bbd7	43	havesb = 0;
6ec186b9	44	fswritefd = -1;
eb93b62a	45	if (stat(dev, &statb) < 0) {
d72e970b	46	printf("Can't stat %s: %s\n", dev, strerror(errno));
eb93b62a KM	47	return (0);
eb93b62a KM	48	}
9324cdb0 KM	49	if ((statb.st_mode & S_IFMT) != S_IFCHR) {
	50	pfatal("%s is not a character device", dev);
	51	if (reply("CONTINUE") == 0)
	52	return (0);
	53	}
569ec282	54	if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
d72e970b	55	printf("Can't open %s: %s\n", dev, strerror(errno));
eb93b62a KM	56	return (0);
	57	}
	58	if (preen == 0)
	59	printf("** %s", dev);
569ec282 KM	60	if (nflag \|\| (fswritefd = open(dev, O_WRONLY)) < 0) {
569ec282 KM	61	fswritefd = -1;
eb93b62a KM	62	if (preen)
	63	pfatal("NO WRITE ACCESS");
	64	printf(" (NO WRITE)");
	65	}
	66	if (preen == 0)
	67	printf("\n");
569ec282	68	fsmodified = 0;
eb93b62a	69	lfdir = 0;
eb93b62a	70	initbarea(&sblk);
7beeecfc	71	initbarea(&asblk);
d35d4c2b KM	72	sblk.b_un.b_buf = malloc(SBSIZE);
	73	asblk.b_un.b_buf = malloc(SBSIZE);
	74	if (sblk.b_un.b_buf == NULL \|\| asblk.b_un.b_buf == NULL)
adc5a10c	75	errexit("cannot allocate space for superblock\n");
569ec282	76	if (lp = getdisklabel((char *)NULL, fsreadfd))
55f8bbd7	77	dev_bsize = secsize = lp->d_secsize;
7beeecfc KM	78	else
7beeecfc KM	79	dev_bsize = secsize = DEV_BSIZE;
eb93b62a	80	/*
c7aed003	81	* Read in the superblock, looking for alternates if necessary
eb93b62a	82	*/
c7aed003	83	if (readsb(1) == 0) {
569ec282	84	if (bflag \|\| preen \|\| calcsb(dev, fsreadfd, &proto) == 0)
c7aed003 KM	85	return(0);
	86	if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
	87	return (0);
	88	for (cg = 0; cg < proto.fs_ncg; cg++) {
	89	bflag = fsbtodb(&proto, cgsblock(&proto, cg));
	90	if (readsb(0) != 0)
	91	break;
	92	}
	93	if (cg >= proto.fs_ncg) {
	94	printf("%s %s\n%s %s\n%s %s\n",
	95	"SEARCH FOR ALTERNATE SUPER-BLOCK",
	96	"FAILED. YOU MUST USE THE",
	97	"-b OPTION TO FSCK TO SPECIFY THE",
	98	"LOCATION OF AN ALTERNATE",
	99	"SUPER-BLOCK TO SUPPLY NEEDED",
	100	"INFORMATION; SEE fsck(8).");
	101	return(0);
	102	}
	103	pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
	104	}
569ec282 KM	105	maxfsblock = sblock.fs_size;
569ec282 KM	106	maxino = sblock.fs_ncg * sblock.fs_ipg;
d9f38d60 KM	107	/*
	108	* Check and potentially fix certain fields in the super block.
	109	*/
	110	if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
	111	pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
	112	if (reply("SET TO DEFAULT") == 1) {
	113	sblock.fs_optim = FS_OPTTIME;
	114	sbdirty();
	115	}
	116	}
	117	if ((sblock.fs_minfree < 0 \|\| sblock.fs_minfree > 99)) {
	118	pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
	119	sblock.fs_minfree);
	120	if (reply("SET TO DEFAULT") == 1) {
	121	sblock.fs_minfree = 10;
	122	sbdirty();
	123	}
	124	}
5f4c807d KM	125	if (sblock.fs_interleave < 1 \|\|
5f4c807d KM	126	sblock.fs_interleave > sblock.fs_nsect) {
d4af1a46	127	sblock.fs_interleave);
43171015	128	sblock.fs_interleave = 1;
d4af1a46	129	sbdirty();
7beeecfc KM	130	dirty(&asblk);
7beeecfc KM	131	}
d4af1a46	132	}
5f4c807d KM	133	if (sblock.fs_npsect < sblock.fs_nsect \|\|
5f4c807d KM	134	sblock.fs_npsect > sblock.fs_nsect*2) {
d4af1a46	135	sblock.fs_npsect);
43171015	136	sblock.fs_npsect = sblock.fs_nsect;
d4af1a46	137	sbdirty();
7beeecfc KM	138	dirty(&asblk);
	139	}
	140	}
249863dc	141	if (sblock.fs_inodefmt >= FS_44INODEFMT) {
3f80f884	142	newinofmt = 1;
249863dc KM	143	} else {
	144	sblock.fs_qbmask = ~sblock.fs_bmask;
	145	sblock.fs_qfmask = ~sblock.fs_fmask;
3f80f884	146	newinofmt = 0;
249863dc KM	147	}
	148	/*
	149	* Convert to new inode format.
	150	*/
	151	if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
	152	if (preen)
	153	pwarn("CONVERTING TO NEW INODE FORMAT\n");
	154	else if (!reply("CONVERT TO NEW INODE FORMAT"))
	155	return(0);
	156	doinglevel2++;
	157	sblock.fs_inodefmt = FS_44INODEFMT;
53a26cfb KM	158	sizepb = sblock.fs_bsize;
	159	sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
	160	for (i = 0; i < NIADDR; i++) {
	161	sizepb *= NINDIR(&sblock);
	162	sblock.fs_maxfilesize += sizepb;
	163	}
249863dc	164	sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
53a26cfb KM	165	sblock.fs_qbmask = ~sblock.fs_bmask;
53a26cfb KM	166	sblock.fs_qfmask = ~sblock.fs_fmask;
249863dc KM	167	sbdirty();
249863dc KM	168	dirty(&asblk);
53a26cfb	169	}
249863dc KM	170	/*
	171	* Convert to new cylinder group format.
	172	*/
	173	if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
	174	if (preen)
	175	pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
	176	else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
	177	return(0);
	178	doinglevel1++;
	179	sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
	180	sblock.fs_nrpos = 8;
	181	sblock.fs_postbloff =
	182	(char *)(&sblock.fs_opostbl[0][0]) -
6c3d0366	183	(char *)(&sblock.fs_firstfield);
249863dc	184	sblock.fs_rotbloff = &sblock.fs_space[0] -
6c3d0366	185	(u_char *)(&sblock.fs_firstfield);
249863dc KM	186	sblock.fs_cgsize =
	187	fragroundup(&sblock, CGSIZE(&sblock));
	188	sbdirty();
	189	dirty(&asblk);
7beeecfc KM	190	}
7beeecfc KM	191	if (asblk.b_dirty) {
569ec282	192	bcopy((char )&sblock, (char )&altsblock,
d72e970b	193	(size_t)sblock.fs_sbsize);
569ec282	194	flush(fswritefd, &asblk);
d4af1a46	195	}
eb93b62a KM	196	/*
	197	* read in the summary info.
	198	*/
05d069d3	199	asked = 0;
eb93b62a KM	200	for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
	201	size = sblock.fs_cssize - i < sblock.fs_bsize ?
	202	sblock.fs_cssize - i : sblock.fs_bsize;
	203	sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size);
569ec282	204	if (bread(fsreadfd, (char *)sblock.fs_csp[j],
eb93b62a	205	fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
05d069d3 KM	206	size) != 0 && !asked) {
	207	pfatal("BAD SUMMARY INFORMATION");
	208	if (reply("CONTINUE") == 0)
	209	errexit("");
	210	asked++;
	211	}
eb93b62a KM	212	}
	213	/*
	214	* allocate and initialize the necessary maps
	215	*/
569ec282 KM	216	bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short));
569ec282 KM	217	blockmap = calloc((unsigned)bmapsize, sizeof (char));
eb93b62a	218	if (blockmap == NULL) {
d72e970b KM	219	printf("cannot alloc %u bytes for blockmap\n",
d72e970b KM	220	(unsigned)bmapsize);
eb93b62a KM	221	goto badsb;
eb93b62a KM	222	}
569ec282	223	statemap = calloc((unsigned)(maxino + 1), sizeof(char));
eb93b62a	224	if (statemap == NULL) {
d72e970b KM	225	printf("cannot alloc %u bytes for statemap\n",
d72e970b KM	226	(unsigned)(maxino + 1));
eb93b62a KM	227	goto badsb;
eb93b62a KM	228	}
249863dc KM	229	typemap = calloc((unsigned)(maxino + 1), sizeof(char));
	230	if (typemap == NULL) {
	231	printf("cannot alloc %u bytes for typemap\n",
	232	(unsigned)(maxino + 1));
	233	goto badsb;
	234	}
569ec282	235	lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short));
eb93b62a	236	if (lncntp == NULL) {
d72e970b KM	237	printf("cannot alloc %u bytes for lncntp\n",
d72e970b KM	238	(unsigned)(maxino + 1) * sizeof(short));
eb93b62a KM	239	goto badsb;
eb93b62a KM	240	}
a5880917	241	numdirs = sblock.fs_cstotal.cs_ndir;
a955a370	242	inplast = 0;
a5880917 KM	243	listmax = numdirs + 10;
	244	inpsort = (struct inoinfo **)calloc((unsigned)listmax,
	245	sizeof(struct inoinfo *));
	246	inphead = (struct inoinfo **)calloc((unsigned)numdirs,
	247	sizeof(struct inoinfo *));
	248	if (inpsort == NULL \|\| inphead == NULL) {
d72e970b KM	249	printf("cannot alloc %u bytes for inphead\n",
d72e970b KM	250	(unsigned)numdirs * sizeof(struct inoinfo *));
a5880917 KM	251	goto badsb;
a5880917 KM	252	}
adc5a10c	253	bufinit();
eb93b62a KM	254	return (1);
	255
	256	badsb:
	257	ckfini();
	258	return (0);
c7aed003 KM	259	}
	260
	261	/*
	262	* Read in the super block and its summary info.
	263	*/
	264	readsb(listerr)
	265	int listerr;
	266	{
55f8bbd7	267	daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
c7aed003	268
569ec282	269	if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
c7aed003 KM	270	return (0);
	271	sblk.b_bno = super;
	272	sblk.b_size = SBSIZE;
	273	/*
	274	* run a few consistency checks of the super block
	275	*/
	276	if (sblock.fs_magic != FS_MAGIC)
	277	{ badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
	278	if (sblock.fs_ncg < 1)
	279	{ badsb(listerr, "NCG OUT OF RANGE"); return (0); }
7beeecfc	280	if (sblock.fs_cpg < 1)
c7aed003 KM	281	{ badsb(listerr, "CPG OUT OF RANGE"); return (0); }
	282	if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl \|\|
	283	(sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl)
	284	{ badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
	285	if (sblock.fs_sbsize > SBSIZE)
	286	{ badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
55f8bbd7 MK	287	/*
	288	* Compute block size that the filesystem is based on,
	289	* according to fsbtodb, and adjust superblock block number
	290	* so we can tell if this is an alternate later.
	291	*/
55f8bbd7 MK	292	super *= dev_bsize;
	293	dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
	294	sblk.b_bno = super / dev_bsize;
0af8a0aa KM	295	if (bflag) {
	296	havesb = 1;
	297	return (1);
	298	}
c7aed003 KM	299	/*
	300	* Set all possible fields that could differ, then do check
	301	* of whole super block against an alternate super block.
	302	* When an alternate super-block is specified this check is skipped.
	303	*/
7beeecfc	304	getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
d35d4c2b	305	if (asblk.b_errs)
7beeecfc	306	return (0);
c7aed003 KM	307	altsblock.fs_time = sblock.fs_time;
	308	altsblock.fs_cstotal = sblock.fs_cstotal;
	309	altsblock.fs_cgrotor = sblock.fs_cgrotor;
	310	altsblock.fs_fmod = sblock.fs_fmod;
	311	altsblock.fs_clean = sblock.fs_clean;
	312	altsblock.fs_ronly = sblock.fs_ronly;
	313	altsblock.fs_flags = sblock.fs_flags;
	314	altsblock.fs_maxcontig = sblock.fs_maxcontig;
	315	altsblock.fs_minfree = sblock.fs_minfree;
	316	altsblock.fs_optim = sblock.fs_optim;
	317	altsblock.fs_rotdelay = sblock.fs_rotdelay;
	318	altsblock.fs_maxbpg = sblock.fs_maxbpg;
	319	bcopy((char )sblock.fs_csp, (char )altsblock.fs_csp,
	320	sizeof sblock.fs_csp);
	321	bcopy((char )sblock.fs_fsmnt, (char )altsblock.fs_fsmnt,
	322	sizeof sblock.fs_fsmnt);
cfbff64d MK	323	bcopy((char )sblock.fs_sparecon, (char )altsblock.fs_sparecon,
cfbff64d MK	324	sizeof sblock.fs_sparecon);
7beeecfc KM	325	/*
	326	* The following should not have to be copied.
	327	*/
	328	altsblock.fs_fsbtodb = sblock.fs_fsbtodb;
	329	altsblock.fs_interleave = sblock.fs_interleave;
	330	altsblock.fs_npsect = sblock.fs_npsect;
	331	altsblock.fs_nrpos = sblock.fs_nrpos;
6cea9ab1	332	altsblock.fs_state = sblock.fs_state;
ad132be1 KM	333	altsblock.fs_qbmask = sblock.fs_qbmask;
	334	altsblock.fs_qfmask = sblock.fs_qfmask;
	335	altsblock.fs_state = sblock.fs_state;
	336	altsblock.fs_maxfilesize = sblock.fs_maxfilesize;
cfbff64d MK	337	if (bcmp((char )&sblock, (char )&altsblock, (int)sblock.fs_sbsize)) {
	338	badsb(listerr,
	339	"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
	340	return (0);
	341	}
55f8bbd7	342	havesb = 1;
c7aed003	343	return (1);
eb93b62a KM	344	}
eb93b62a KM	345
c7aed003 KM	346	badsb(listerr, s)
c7aed003 KM	347	int listerr;
eb93b62a KM	348	char *s;
	349	{
	350
c7aed003 KM	351	if (!listerr)
c7aed003 KM	352	return;
eb93b62a	353	if (preen)
8b45fecd	354	printf("%s: ", cdevname);
c7aed003 KM	355	pfatal("BAD SUPER BLOCK: %s\n", s);
	356	}
	357
	358	/*
	359	* Calculate a prototype superblock based on information in the disk label.
	360	* When done the cgsblock macro can be calculated and the fs_ncg field
	361	* can be used. Do NOT attempt to use other macros without verifying that
	362	* their needed information is available!
	363	*/
	364	calcsb(dev, devfd, fs)
	365	char *dev;
	366	int devfd;
	367	register struct fs *fs;
	368	{
	369	register struct disklabel *lp;
	370	register struct partition *pp;
	371	register char *cp;
c7aed003 KM	372	int i;
	373
	374	cp = index(dev, '\0') - 1;
	375	if (cp == (char )-1 \|\| (cp < 'a' \|\| cp > 'h') && !isdigit(cp)) {
	376	pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
	377	return (0);
	378	}
	379	lp = getdisklabel(dev, devfd);
	380	if (isdigit(*cp))
	381	pp = &lp->d_partitions[0];
	382	else
	383	pp = &lp->d_partitions[*cp - 'a'];
	384	if (pp->p_fstype != FS_BSDFFS) {
55f8bbd7	385	pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
c7aed003 KM	386	dev, pp->p_fstype < FSMAXTYPES ?
	387	fstypenames[pp->p_fstype] : "unknown");
	388	return (0);
	389	}
569ec282	390	bzero((char *)fs, sizeof(struct fs));
c7aed003 KM	391	fs->fs_fsize = pp->p_fsize;
	392	fs->fs_frag = pp->p_frag;
	393	fs->fs_cpg = pp->p_cpg;
	394	fs->fs_size = pp->p_size;
	395	fs->fs_ntrak = lp->d_ntracks;
	396	fs->fs_nsect = lp->d_nsectors;
	397	fs->fs_spc = lp->d_secpercyl;
	398	fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
	399	fs->fs_sblkno = roundup(
	400	howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
	401	fs->fs_frag);
	402	fs->fs_cgmask = 0xffffffff;
	403	for (i = fs->fs_ntrak; i > 1; i >>= 1)
	404	fs->fs_cgmask <<= 1;
	405	if (!POWEROF2(fs->fs_ntrak))
	406	fs->fs_cgmask <<= 1;
	407	fs->fs_cgoffset = roundup(
	408	howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
	409	fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
	410	fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg);
	411	for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
	412	fs->fs_fsbtodb++;
55f8bbd7	413	dev_bsize = lp->d_secsize;
c7aed003 KM	414	return (1);
	415	}
	416
c7aed003 KM	417	struct disklabel *
	418	getdisklabel(s, fd)
	419	char *s;
	420	int fd;
	421	{
	422	static struct disklabel lab;
	423
	424	if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
919c85da MK	425	if (s == NULL)
919c85da MK	426	return ((struct disklabel *)NULL);
d72e970b	427	pwarn("ioctl (GCINFO): %s\n", strerror(errno));
1a85539e	428	errexit("%s: can't read disk label\n", s);
c7aed003 KM	429	}
	430	return (&lab);
	431	}