NetBSD/sbin/fsck_lfs/inode.c

/* $NetBSD: inode.c,v 1.9 2001/01/06 23:08:24 joff Exp $	 */

/*
 * Copyright (c) 1997, 1998
 *      Konrad Schroder.  All rights reserved.
 * 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.
 */

#include <sys/param.h>
#include <sys/time.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <sys/mount.h>		/* XXX */
#include <ufs/lfs/lfs.h>
#ifndef SMALL
#include <pwd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "fsck.h"
#include "fsutil.h"
#include "extern.h"

extern SEGUSE  *seg_table;
extern daddr_t *din_table;

static int      iblock(struct inodesc *, long, u_int64_t);
int             blksreqd(struct lfs *, int);
int             lfs_maxino(void);
SEGUSE         *lfs_gseguse(int, struct bufarea **);
/* static void dump_inoblk (struct lfs *, struct dinode *); */

/* stolen from lfs_inode.c */
/* Search a block for a specific dinode. */
struct dinode  *
lfs_difind(struct lfs * fs, ino_t ino, struct dinode * dip)
{
	register int    cnt;

	for (cnt = 0; cnt < INOPB(fs); cnt++)
		if (dip[cnt].di_inumber == ino)
			return &(dip[cnt]);
	/* printf("lfs_difind: dinode %u not found\n", ino); */
	return NULL;
}

/*
 * Calculate the number of blocks required to be able to address data block
 * blkno (counting, of course, indirect blocks).  blkno must >=0.
 */
int
blksreqd(struct lfs * fs, int blkno)
{
	long            n = blkno;

	if (blkno < NDADDR)
		return blkno;
	n -= NDADDR;
	if (n < NINDIR(fs))
		return blkno + 1;
	n -= NINDIR(fs);
	if (n < NINDIR(fs) * NINDIR(fs))
		return blkno + 2 + n / NINDIR(fs) + 1;
	n -= NINDIR(fs) * NINDIR(fs);
	return blkno + 2 + NINDIR(fs) + n / (NINDIR(fs) * NINDIR(fs)) + 1;
}

#define BASE_SINDIR (NDADDR)
#define BASE_DINDIR (NDADDR+NINDIR(fs))
#define BASE_TINDIR (NDADDR+NINDIR(fs)+NINDIR(fs)*NINDIR(fs))

#define D_UNITS (NINDIR(fs))
#define T_UNITS (NINDIR(fs)*NINDIR(fs))

ufs_daddr_t     lfs_bmap(struct lfs *, struct dinode *, ufs_daddr_t);

ufs_daddr_t
lfs_bmap(struct lfs * fs, struct dinode * idinode, ufs_daddr_t lbn)
{
	ufs_daddr_t     residue, up, off = 0;
	struct bufarea *bp;

	if (lbn > 0 && lbn > (idinode->di_size - 1) / dev_bsize) {
		return UNASSIGNED;
	}
	/*
	 * Indirect blocks: if it is a first-level indirect, pull its
	 * address from the inode; otherwise, call ourselves to find the
	 * address of the parent indirect block, and load that to find
	 * the desired address.
	 */
	if (lbn < 0) {
		lbn *= -1;
		if (lbn == NDADDR) {
			/* printf("lbn %d: single indir base\n", -lbn); */
			return idinode->di_ib[0];	/* single indirect */
		} else if (lbn == BASE_DINDIR + 1) {
			/* printf("lbn %d: double indir base\n", -lbn); */
			return idinode->di_ib[1];	/* double indirect */
		} else if (lbn == BASE_TINDIR + 2) {
			/* printf("lbn %d: triple indir base\n", -lbn); */
			return idinode->di_ib[2];	/* triple indirect */
		}
		/*
		 * Find the immediate parent. This is essentially finding the
		 * residue of modulus, and then rounding accordingly.
		 */
		residue = (lbn - NDADDR) % NINDIR(fs);
		if (residue == 1) {
			/* Double indirect.  Parent is the triple. */
			up = idinode->di_ib[2];
			off = (lbn - 2 - BASE_TINDIR) / (NINDIR(fs) * NINDIR(fs));
			if (up == UNASSIGNED || up == LFS_UNUSED_DADDR)
				return UNASSIGNED;
			/* printf("lbn %d: parent is the triple\n", -lbn); */
			bp = getddblk(up, sblock.lfs_bsize);
			bp->b_flags &= ~B_INUSE;
			return ((daddr_t *)(bp->b_un.b_buf))[off];
		} else {	/* residue == 0 */
			/* Single indirect.  Two cases. */
			if (lbn < BASE_TINDIR) {
				/* Parent is the double, simple */
				up = -(BASE_DINDIR) - 1;
				off = (lbn - BASE_DINDIR) / D_UNITS;
				/*
				 * printf("lbn %d: parent is %d/%d\n", -lbn,
				 * up,off);
				 */
			} else {
				/* Ancestor is the triple, more complex */
				up = ((lbn - BASE_TINDIR) / T_UNITS)
					* T_UNITS + BASE_TINDIR + 1;
				off = (lbn / D_UNITS) - (up / D_UNITS);
				up = -up;
				/*
				 * printf("lbn %d: parent is %d/%d\n", -lbn,
				 * up,off);
				 */
			}
		}
	} else {
		/* Direct block.  Its parent must be a single indirect. */
		if (lbn < NDADDR)
			return idinode->di_db[lbn];
		else {
			/* Parent is an indirect block. */
			up = -(((lbn - NDADDR) / D_UNITS) * D_UNITS + NDADDR);
			off = (lbn - NDADDR) % D_UNITS;
			/* printf("lbn %d: parent is %d/%d\n", lbn,up,off); */
		}
	}
	up = lfs_bmap(fs, idinode, up);
	if (up == UNASSIGNED || up == LFS_UNUSED_DADDR)
		return UNASSIGNED;
	bp = getddblk(up, sblock.lfs_bsize);
	bp->b_flags &= ~B_INUSE;
	return ((daddr_t *)(bp->b_un.b_buf))[off];
}

/*
 * This is kind of gross.  We use this to find the nth block
 * from a file whose inode has disk address idaddr.  In practice
 * we will only use this to find blocks of the ifile.
 */
static struct bufarea empty;

struct bufarea *
getfileblk(struct lfs * fs, struct dinode * idinode, ino_t lbn)
{
	struct bufarea *bp;
	ufs_daddr_t     blkno;
	static char     empty_buf[65536];

	empty.b_un.b_buf = &(empty_buf[0]);

	blkno = lfs_bmap(fs, idinode, lbn);
	if (blkno == UNASSIGNED || blkno == LFS_UNUSED_DADDR) {
		printf("Warning: ifile lbn %d unassigned!\n", lbn);
		return &empty;
	}
	bp = getddblk(blkno, sblock.lfs_bsize);
	return bp;
}

#if 0
static struct dinode *
gidinode(void)
{
	static struct dinode *idinode;

	if (!idinode) {		/* only need to do this once */
		idinode = lfs_difind(&sblock, sblock.lfs_ifile, &ifblock);
	}
	return idinode;
}
#endif

struct ifile   *
lfs_ientry(ino_t ino, struct bufarea ** bpp)
{
	struct ifile   *ifp;

	*bpp = getfileblk(&sblock, lfs_ginode(LFS_IFILE_INUM),
			  ino / sblock.lfs_ifpb + sblock.lfs_cleansz +
			  sblock.lfs_segtabsz);
	if (*bpp == &empty) {
		printf("Warning: ino %d ientry in unassigned block\n", ino);
	}
	if (*bpp) {
		ifp = (((struct ifile *)((*bpp)->b_un.b_buf)) +
		       (ino % sblock.lfs_ifpb));
		return ifp;
	} else
		return NULL;
}

SEGUSE         *
lfs_gseguse(int segnum, struct bufarea ** bpp)
{
	int             blkno;

	blkno = segnum / (sblock.lfs_bsize / sizeof(SEGUSE)) + sblock.lfs_cleansz;
	(*bpp) = getfileblk(&sblock, lfs_ginode(LFS_IFILE_INUM), blkno);
	return ((SEGUSE *)(*bpp)->b_un.b_buf) + segnum % (sblock.lfs_bsize / sizeof(SEGUSE));
}

daddr_t
lfs_ino_daddr(ino_t inumber)
{
	daddr_t         daddr;
	IFILE          *ifp;
	struct bufarea *bp;

	if (din_table[inumber]) {
		daddr = din_table[inumber];
	} else {
		if (inumber == LFS_IFILE_INUM)
			daddr = idaddr;
		else {
			ifp = lfs_ientry(inumber, &bp);
			if (ifp == NULL) {
				return NULL;
			}
			if (ifp->if_daddr == LFS_UNUSED_DADDR) {
				bp->b_flags &= ~B_INUSE;
				return NULL;
			}
			bp->b_flags &= ~B_INUSE;
			daddr = ifp->if_daddr;
		}

		din_table[inumber] = daddr;
		seg_table[datosn(&sblock, daddr)].su_nbytes += DINODE_SIZE;
	}
	return daddr;
}

struct dinode  *
lfs_ginode(ino_t inumber)
{
	struct ifile   *ifp;
	struct dinode  *din;
	struct bufarea *bp;
	daddr_t         daddr;

	if (inumber >= maxino)
		errexit("bad inode number %d to lfs_ginode\n", inumber);

#if 0
	if (inumber == LFS_IFILE_INUM) {
		daddr = idaddr;
		if (din_table[LFS_IFILE_INUM] == 0) {
			din_table[LFS_IFILE_INUM] = daddr;
			seg_table[datosn(&sblock, daddr)].su_nbytes += DINODE_SIZE;
		}
		return gidinode();
	}
#endif

	daddr = lfs_ino_daddr(inumber);
	if (daddr == 0)
		return NULL;

	if (pbp)
		pbp->b_flags &= ~B_INUSE;

	pbp = getddblk(daddr, sblock.lfs_bsize);
	din = lfs_difind(&sblock, inumber, pbp->b_un.b_dinode);

	if (din == NULL) {
		pfatal("INODE %d NOT FOUND\n", inumber);
		if (reply("free")) {
			ifp = lfs_ientry(inumber, &bp);
			ifp->if_daddr = LFS_UNUSED_DADDR;
			ifp->if_nextfree = sblock.lfs_free;
			sblock.lfs_free = inumber;
			sbdirty();
			dirty(bp);
			bp->b_flags &= ~B_INUSE;
		}
	}
	return din;
}

/* imported from lfs_vfsops.c */
int
ino_to_fsba(struct lfs * fs, ino_t ino)
{
	daddr_t         daddr = LFS_UNUSED_DADDR;
	struct ifile   *ifp;
	struct bufarea *bp;

	/* Translate the inode number to a disk address. */
	if (ino == LFS_IFILE_INUM)
		daddr = fs->lfs_idaddr;
	else {
		ifp = lfs_ientry(ino, &bp);
		if (ifp) {
			daddr = ifp->if_daddr;
		} else {
			pwarn("Can't locate inode #%ud\n", ino);
		}
		bp->b_flags &= ~B_INUSE;
	}
	return daddr;
}

/*
 * Check validity of held (direct) blocks in an inode.
 */
int
ckinode(struct dinode *dp, struct inodesc *idesc)
{
	register ufs_daddr_t *ap;
	long            ret, n, ndb, offset;
	struct dinode   dino;
	u_int64_t       remsize, sizepb;
	mode_t          mode;
	char            pathbuf[MAXPATHLEN + 1];

	if (idesc->id_fix != IGNORE)
		idesc->id_fix = DONTKNOW;
	idesc->id_entryno = 0;
	idesc->id_filesize = dp->di_size;
	mode = dp->di_mode & IFMT;
	if (mode == IFBLK || mode == IFCHR ||
	    (mode == IFLNK && (dp->di_size < sblock.lfs_maxsymlinklen ||
	                       (sblock.lfs_maxsymlinklen == 0 &&
				dp->di_blocks == 0))))
		return (KEEPON);
	dino = *dp;
	ndb = howmany(dino.di_size, sblock.lfs_bsize);

	for (ap = &dino.di_db[0]; ap < &dino.di_db[NDADDR]; ap++) {
		if (--ndb == 0 && (offset = blkoff(&sblock, dino.di_size)) != 0) {
			idesc->id_numfrags =
				numfrags(&sblock, fragroundup(&sblock, offset));
		} else
			idesc->id_numfrags = sblock.lfs_frag;
		if (*ap == 0) {
			if (idesc->id_type == DATA && ndb >= 0) {
				/* An empty block in a directory XXX */
				getpathname(pathbuf, idesc->id_number,
					    idesc->id_number);
				pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
				       pathbuf);
				if (reply("ADJUST LENGTH") == 1) {
					dp = ginode(idesc->id_number);
					dp->di_size = (ap - &dino.di_db[0]) *
						sblock.lfs_bsize;
					printf(
					"YOU MUST RERUN FSCK AFTERWARDS\n");
					rerun = 1;
					inodirty();
				}
			}
			continue;
		}
		idesc->id_blkno = *ap;
		idesc->id_lblkno = ap - &dino.di_db[0];
		if (idesc->id_type == ADDR) {
			ret = (*idesc->id_func)(idesc);
		} else
			ret = dirscan(idesc);
		idesc->id_lblkno = 0;
		if (ret & STOP)
			return (ret);
	}
	idesc->id_numfrags = sblock.lfs_frag;
	remsize = dino.di_size - sblock.lfs_bsize * NDADDR;
	sizepb = sblock.lfs_bsize;
	for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
		if (*ap) {
			idesc->id_blkno = *ap;
			ret = iblock(idesc, n, remsize);
			if (ret & STOP)
				return (ret);
		} else {
			if (idesc->id_type == DATA && remsize > 0) {
				/* An empty block in a directory XXX */
				getpathname(pathbuf, idesc->id_number,
					    idesc->id_number);
				pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
				       pathbuf);
				if (reply("ADJUST LENGTH") == 1) {
					dp = ginode(idesc->id_number);
					dp->di_size -= remsize;
					remsize = 0;
					printf(
					"YOU MUST RERUN FSCK AFTERWARDS\n");
					rerun = 1;
					inodirty();
					break;
				}
			}
		}
		sizepb *= NINDIR(&sblock);
		remsize -= sizepb;
	}
	return (KEEPON);
}

static int
iblock(struct inodesc * idesc, long ilevel, u_int64_t isize)
{
	daddr_t	       *ap, *aplim;
	struct bufarea *bp;
	int             i, n, (*func)(struct inodesc *), nif;
	u_int64_t       sizepb;
	char            pathbuf[MAXPATHLEN + 1], buf[BUFSIZ];
	struct dinode  *dp;

	if (idesc->id_type == ADDR) {
		func = idesc->id_func;
		n = (*func)(idesc);
		if ((n & KEEPON) == 0)
			return (n);
	} else
		func = dirscan;
	if (chkrange(idesc->id_blkno, fragstodb(&sblock, idesc->id_numfrags)))
		return (SKIP);
	bp = getddblk(idesc->id_blkno, sblock.lfs_bsize);
	ilevel--;
	for (sizepb = sblock.lfs_bsize, i = 0; i < ilevel; i++)
		sizepb *= NINDIR(&sblock);
	if (isize > sizepb * NINDIR(&sblock))
		nif = NINDIR(&sblock);
	else
		nif = howmany(isize, sizepb);
	if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) {
		aplim = &bp->b_un.b_indir[NINDIR(&sblock)];
		for (ap = &bp->b_un.b_indir[nif]; ap < aplim; ap++) {
			if (*ap == 0)
				continue;
			(void)sprintf(buf, "PARTIALLY TRUNCATED INODE I=%u",
					      idesc->id_number);
			if (dofix(idesc, buf)) {
				*ap = 0;
				dirty(bp);
			}
		}
		flush(fswritefd, bp);
	}
	aplim = &bp->b_un.b_indir[nif];
	for (ap = bp->b_un.b_indir; ap < aplim; ap++) {
		if (*ap) {
			idesc->id_blkno = *ap;
			if (ilevel == 0)
				n = (*func)(idesc);
			else
				n = iblock(idesc, ilevel, isize);
			if (n & STOP) {
				bp->b_flags &= ~B_INUSE;
				return (n);
			}
		} else {
			if (idesc->id_type == DATA && isize > 0) {
				/* An empty block in a directory XXX */
				getpathname(pathbuf, idesc->id_number,
					    idesc->id_number);
				pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
				       pathbuf);
				if (reply("ADJUST LENGTH") == 1) {
					dp = ginode(idesc->id_number);
					dp->di_size -= isize;
					isize = 0;
					printf(
					"YOU MUST RERUN FSCK AFTERWARDS\n");
					rerun = 1;
					inodirty();
					bp->b_flags &= ~B_INUSE;
					return (STOP);
				}
			}
		}
		isize -= sizepb;
	}
	bp->b_flags &= ~B_INUSE;
	return (KEEPON);
}

/*
 * Check that a block in a legal block number.
 * Return 0 if in range, 1 if out of range.
 */
int
chkrange(daddr_t blk, int cnt)
{
	if (blk < btodb(LFS_LABELPAD+LFS_SBPAD)) {
		return (1);
	}
	if (blk > fsbtodb(&sblock, maxfsblock)) {
		return (1);
	}
	return (0);
}

/*
 * General purpose interface for reading inodes.
 */
struct dinode  *
ginode(ino_t inumber)
{
	return lfs_ginode(inumber);
}

/*
 * Routines to maintain information about directory inodes.
 * This is built during the first pass and used during the
 * second and third passes.
 *
 * Enter inodes into the cache.
 */
void
cacheino(struct dinode *dp, ino_t inumber)
{
	register struct inoinfo *inp;
	struct inoinfo **inpp;
	unsigned int    blks;

	blks = howmany(dp->di_size, sblock.lfs_bsize);
	if (blks > NDADDR)
		blks = NDADDR + NIADDR;
	inp = (struct inoinfo *)
		malloc(sizeof(*inp) + (blks - 1) * sizeof(daddr_t));
	if (inp == NULL)
		return;
	inpp = &inphead[inumber % numdirs];
	inp->i_nexthash = *inpp;
	*inpp = inp;
	inp->i_child = inp->i_sibling = inp->i_parentp = 0;
	if (inumber == ROOTINO)
		inp->i_parent = ROOTINO;
	else
		inp->i_parent = (ino_t)0;
	inp->i_dotdot = (ino_t)0;
	inp->i_number = inumber;
	inp->i_isize = dp->di_size;
	inp->i_numblks = blks * sizeof(daddr_t);
	memcpy(&inp->i_blks[0], &dp->di_db[0], (size_t)inp->i_numblks);
	if (inplast == listmax) {
		listmax += 100;
		inpsort = (struct inoinfo **)realloc((char *) inpsort,
			     (unsigned)listmax * sizeof(struct inoinfo *));
		if (inpsort == NULL)
			errexit("cannot increase directory list");
	}
	inpsort[inplast++] = inp;
}

/*
 * Look up an inode cache structure.
 */
struct inoinfo *
getinoinfo(ino_t inumber)
{
	register struct inoinfo *inp;

	for (inp = inphead[inumber % numdirs]; inp; inp = inp->i_nexthash) {
		if (inp->i_number != inumber)
			continue;
		return (inp);
	}
	errexit("cannot find inode %d\n", inumber);
	return ((struct inoinfo *)0);
}

/*
 * Clean up all the inode cache structure.
 */
void
inocleanup()
{
	register struct inoinfo **inpp;

	if (inphead == NULL)
		return;
	for (inpp = &inpsort[inplast - 1]; inpp >= inpsort; inpp--)
		free((char *)(*inpp));
	free((char *)inphead);
	free((char *)inpsort);
	inphead = inpsort = NULL;
}

void
inodirty()
{
	dirty(pbp);
}

void
clri(struct inodesc *idesc, char *type, int flag)
{
	register struct dinode *dp;
	struct bufarea *bp;
	IFILE          *ifp;

	dp = ginode(idesc->id_number);
	if (flag == 1) {
		pwarn("%s %s", type,
		      (dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE");
		pinode(idesc->id_number);
	}
	if (preen || reply("CLEAR") == 1) {
		if (preen)
			printf(" (CLEARED)\n");
		n_files--;
		(void)ckinode(dp, idesc);
		clearinode(dp);
		statemap[idesc->id_number] = USTATE;
		inodirty();

		/* Send cleared inode to the free list */

		ifp = lfs_ientry(idesc->id_number, &bp);
		ifp->if_daddr = LFS_UNUSED_DADDR;
		ifp->if_nextfree = sblock.lfs_free;
		sblock.lfs_free = idesc->id_number;
		sbdirty();
		dirty(bp);
		bp->b_flags &= ~B_INUSE;
	}
}

int
findname(struct inodesc *idesc)
{
	register struct direct *dirp = idesc->id_dirp;

	if (dirp->d_ino != idesc->id_parent)
		return (KEEPON);
	memcpy(idesc->id_name, dirp->d_name, (size_t)dirp->d_namlen + 1);
	return (STOP | FOUND);
}

int
findino(struct inodesc *idesc)
{
	register struct direct *dirp = idesc->id_dirp;

	if (dirp->d_ino == 0)
		return (KEEPON);
	if (strcmp(dirp->d_name, idesc->id_name) == 0 &&
	    dirp->d_ino >= ROOTINO && dirp->d_ino < maxino) {
		idesc->id_parent = dirp->d_ino;
		return (STOP | FOUND);
	}
	return (KEEPON);
}

void
pinode(ino_t ino)
{
	register struct dinode *dp;
	register char  *p;
	struct passwd  *pw;
	time_t          t;

	printf(" I=%u ", ino);
	if (ino < ROOTINO || ino >= maxino)
		return;
	dp = ginode(ino);
	if (dp) {
		printf(" OWNER=");
#ifndef SMALL
		if ((pw = getpwuid((int)dp->di_uid)) != 0)
			printf("%s ", pw->pw_name);
		else
#endif
			printf("%u ", (unsigned)dp->di_uid);
		printf("MODE=%o\n", dp->di_mode);
		if (preen)
			printf("%s: ", cdevname());
		printf("SIZE=%llu ", (unsigned long long)dp->di_size);
		t = dp->di_mtime;
		p = ctime(&t);
		printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
	}
}

void
blkerror(ino_t ino, char *type, daddr_t blk)
{

	pfatal("%d %s I=%u", blk, type, ino);
	printf("\n");
	if (exitonfail)
		exit(1);
	switch (statemap[ino]) {

	case FSTATE:
		statemap[ino] = FCLEAR;
		return;

	case DSTATE:
		statemap[ino] = DCLEAR;
		return;

	case FCLEAR:
	case DCLEAR:
		return;

	default:
		errexit("BAD STATE %d TO BLKERR", statemap[ino]);
		/* NOTREACHED */
	}
}

/*
 * allocate an unused inode
 */
ino_t
allocino(ino_t request, int type)
{
	register ino_t  ino;
	register struct dinode *dp;
	time_t          t;

	if (request == 0)
		request = ROOTINO;
	else if (statemap[request] != USTATE)
		return (0);
	for (ino = request; ino < maxino; ino++)
		if (statemap[ino] == USTATE)
			break;
	if (ino == maxino)
		return (0);
	switch (type & IFMT) {
	case IFDIR:
		statemap[ino] = DSTATE;
		break;
	case IFREG:
	case IFLNK:
		statemap[ino] = FSTATE;
		break;
	default:
		return (0);
	}
	dp = ginode(ino);
	dp->di_db[0] = allocblk((long)1);
	if (dp->di_db[0] == 0) {
		statemap[ino] = USTATE;
		return (0);
	}
	dp->di_mode = type;
	(void)time(&t);
	dp->di_atime = t;
	dp->di_mtime = dp->di_ctime = dp->di_atime;
	dp->di_size = sblock.lfs_fsize;
	dp->di_blocks = btodb(sblock.lfs_fsize);
	n_files++;
	inodirty();
	if (newinofmt)
		typemap[ino] = IFTODT(type);
	return (ino);
}

/*
 * deallocate an inode
 */
void
freeino(ino_t ino)
{
	struct inodesc  idesc;
	struct dinode  *dp;

	memset(&idesc, 0, sizeof(struct inodesc));
	idesc.id_type = ADDR;
	idesc.id_func = pass4check;
	idesc.id_number = ino;
	dp = ginode(ino);
	(void)ckinode(dp, &idesc);
	clearinode(dp);
	inodirty();
	statemap[ino] = USTATE;

	n_files--;
}