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

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)dir.c	5.5 (Berkeley) %G%";
#endif not lint

#include <sys/param.h>
#include <sys/inode.h>
#include <sys/fs.h>
#define KERNEL
#include <sys/dir.h>
#undef KERNEL
#include "fsck.h"

#define MINDIRSIZE	(sizeof (struct dirtemplate))

char	*endpathname = &pathname[BUFSIZ - 2];
char	*lfname = "lost+found";
int	lfmode = 01777;
struct	dirtemplate emptydir = { 0, DIRBLKSIZ };
struct	dirtemplate dirhead = { 0, 12, 1, ".", 0, DIRBLKSIZ - 12, 2, ".." };

DIRECT	*fsck_readdir();
BUFAREA	*getdirblk();

descend(parentino, inumber)
	struct inodesc *parentino;
	ino_t inumber;
{
	register DINODE *dp;
	struct inodesc curino;

	bzero((char *)&curino, sizeof(struct inodesc));
	if (statemap[inumber] != DSTATE)
		errexit("BAD INODE %d TO DESCEND", statemap[inumber]);
	statemap[inumber] = DFOUND;
	dp = ginode(inumber);
	if (dp->di_size == 0) {
		direrr(inumber, "ZERO LENGTH DIRECTORY");
		if (reply("REMOVE") == 1)
			statemap[inumber] = DCLEAR;
		return;
	}
	if (dp->di_size < MINDIRSIZE) {
		direrr(inumber, "DIRECTORY TOO SHORT");
		dp->di_size = MINDIRSIZE;
		if (reply("FIX") == 1)
			inodirty();
	}
	if ((dp->di_size & (DIRBLKSIZ - 1)) != 0) {
		pwarn("DIRECTORY %s: LENGTH %d NOT MULTIPLE OF %d",
			pathname, dp->di_size, DIRBLKSIZ);
		dp->di_size = roundup(dp->di_size, DIRBLKSIZ);
		if (preen)
			printf(" (ADJUSTED)\n");
		if (preen || reply("ADJUST") == 1)
			inodirty();
	}
	curino.id_type = DATA;
	curino.id_func = parentino->id_func;
	curino.id_parent = parentino->id_number;
	curino.id_number = inumber;
	(void)ckinode(dp, &curino);
	if (curino.id_entryno < 2) {
		direrr(inumber, "NULL DIRECTORY");
		if (reply("REMOVE") == 1)
			statemap[inumber] = DCLEAR;
	}
}

dirscan(idesc)
	register struct inodesc *idesc;
{
	register DIRECT *dp;
	register BUFAREA *bp;
	int dsize, n;
	long blksiz;
	char dbuf[DIRBLKSIZ];

	if (idesc->id_type != DATA)
		errexit("wrong type to dirscan %d\n", idesc->id_type);
	if (idesc->id_entryno == 0 &&
	    (idesc->id_filesize & (DIRBLKSIZ - 1)) != 0)
		idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ);
	blksiz = idesc->id_numfrags * sblock.fs_fsize;
	if (outrange(idesc->id_blkno, idesc->id_numfrags)) {
		idesc->id_filesize -= blksiz;
		return (SKIP);
	}
	idesc->id_loc = 0;
	for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
		dsize = dp->d_reclen;
		bcopy((char *)dp, dbuf, dsize);
		idesc->id_dirp = (DIRECT *)dbuf;
		if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
			bp = getdirblk(idesc->id_blkno, blksiz);
			bcopy(dbuf, (char *)dp, dsize);
			dirty(bp);
			sbdirty();
		}
		if (n & STOP) 
			return (n);
	}
	return (idesc->id_filesize > 0 ? KEEPON : STOP);
}

/*
 * get next entry in a directory.
 */
DIRECT *
fsck_readdir(idesc)
	register struct inodesc *idesc;
{
	register DIRECT *dp, *ndp;
	register BUFAREA *bp;
	long size, blksiz;

	blksiz = idesc->id_numfrags * sblock.fs_fsize;
	bp = getdirblk(idesc->id_blkno, blksiz);
	if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
	    idesc->id_loc < blksiz) {
		dp = (DIRECT *)(bp->b_un.b_buf + idesc->id_loc);
		if (dircheck(idesc, dp))
			goto dpok;
		idesc->id_loc += DIRBLKSIZ;
		idesc->id_filesize -= DIRBLKSIZ;
		dp->d_reclen = DIRBLKSIZ;
		dp->d_ino = 0;
		dp->d_namlen = 0;
		dp->d_name[0] = '\0';
		if (dofix(idesc, "DIRECTORY CORRUPTED"))
			dirty(bp);
		return (dp);
	}
dpok:
	if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
		return NULL;
	dp = (DIRECT *)(bp->b_un.b_buf + idesc->id_loc);
	idesc->id_loc += dp->d_reclen;
	idesc->id_filesize -= dp->d_reclen;
	if ((idesc->id_loc % DIRBLKSIZ) == 0)
		return (dp);
	ndp = (DIRECT *)(bp->b_un.b_buf + idesc->id_loc);
	if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
	    dircheck(idesc, ndp) == 0) {
		size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
		dp->d_reclen += size;
		idesc->id_loc += size;
		idesc->id_filesize -= size;
		if (dofix(idesc, "DIRECTORY CORRUPTED"))
			dirty(bp);
	}
	return (dp);
}

/*
 * Verify that a directory entry is valid.
 * This is a superset of the checks made in the kernel.
 */
dircheck(idesc, dp)
	struct inodesc *idesc;
	register DIRECT *dp;
{
	register int size;
	register char *cp;
	int spaceleft;

	size = DIRSIZ(dp);
	spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
	if (dp->d_ino < imax &&
	    dp->d_reclen != 0 &&
	    dp->d_reclen <= spaceleft &&
	    (dp->d_reclen & 0x3) == 0 &&
	    dp->d_reclen >= size &&
	    idesc->id_filesize >= size &&
	    dp->d_namlen <= MAXNAMLEN) {
		if (dp->d_ino == 0)
			return (1);
		for (cp = dp->d_name, size = 0; size < dp->d_namlen; size++)
			if (*cp == 0 || (*cp++ & 0200))
				return (0);
		if (*cp == 0)
			return (1);
	}
	return (0);
}

direrr(ino, s)
	ino_t ino;
	char *s;
{
	register DINODE *dp;

	pwarn("%s ", s);
	pinode(ino);
	printf("\n");
	if (ino < ROOTINO || ino > imax) {
		pfatal("NAME=%s\n", pathname);
		return;
	}
	dp = ginode(ino);
	if (ftypeok(dp))
		pfatal("%s=%s\n", DIRCT(dp) ? "DIR" : "FILE", pathname);
	else
		pfatal("NAME=%s\n", pathname);
}

adjust(idesc, lcnt)
	register struct inodesc *idesc;
	short lcnt;
{
	register DINODE *dp;

	dp = ginode(idesc->id_number);
	if (dp->di_nlink == lcnt) {
		if (linkup(idesc->id_number, (ino_t)0) == 0)
			clri(idesc, "UNREF", 0);
	} else {
		pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
			(DIRCT(dp) ? "DIR" : "FILE"));
		pinode(idesc->id_number);
		printf(" COUNT %d SHOULD BE %d",
			dp->di_nlink, dp->di_nlink-lcnt);
		if (preen) {
			if (lcnt < 0) {
				printf("\n");
				pfatal("LINK COUNT INCREASING");
			}
			printf(" (ADJUSTED)\n");
		}
		if (preen || reply("ADJUST") == 1) {
			dp->di_nlink -= lcnt;
			inodirty();
		}
	}
}

mkentry(idesc)
	struct inodesc *idesc;
{
	register DIRECT *dirp = idesc->id_dirp;
	DIRECT newent;
	int newlen, oldlen;

	newent.d_namlen = 11;
	newlen = DIRSIZ(&newent);
	if (dirp->d_ino != 0)
		oldlen = DIRSIZ(dirp);
	else
		oldlen = 0;
	if (dirp->d_reclen - oldlen < newlen)
		return (KEEPON);
	newent.d_reclen = dirp->d_reclen - oldlen;
	dirp->d_reclen = oldlen;
	dirp = (struct direct *)(((char *)dirp) + oldlen);
	dirp->d_ino = idesc->id_parent;	/* ino to be entered is in id_parent */
	dirp->d_reclen = newent.d_reclen;
	dirp->d_namlen = strlen(idesc->id_name);
	bcopy(idesc->id_name, dirp->d_name, dirp->d_namlen + 1);
	return (ALTERED|STOP);
}

chgino(idesc)
	struct inodesc *idesc;
{
	register DIRECT *dirp = idesc->id_dirp;

	if (bcmp(dirp->d_name, idesc->id_name, dirp->d_namlen + 1))
		return (KEEPON);
	dirp->d_ino = idesc->id_parent;;
	return (ALTERED|STOP);
}

linkup(orphan, pdir)
	ino_t orphan;
	ino_t pdir;
{
	register DINODE *dp;
	int lostdir, len;
	ino_t oldlfdir;
	struct inodesc idesc;
	char tempname[BUFSIZ];
	extern int pass4check();

	bzero((char *)&idesc, sizeof(struct inodesc));
	dp = ginode(orphan);
	lostdir = DIRCT(dp);
	pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
	pinode(orphan);
	if (preen && dp->di_size == 0)
		return (0);
	if (preen)
		printf(" (RECONNECTED)\n");
	else
		if (reply("RECONNECT") == 0)
			return (0);
	pathp = pathname;
	*pathp++ = '/';
	*pathp = '\0';
	if (lfdir == 0) {
		dp = ginode(ROOTINO);
		idesc.id_name = lfname;
		idesc.id_type = DATA;
		idesc.id_func = findino;
		idesc.id_number = ROOTINO;
		if ((ckinode(dp, &idesc) & FOUND) != 0) {
			lfdir = idesc.id_parent;
		} else {
			pwarn("NO lost+found DIRECTORY");
			if (preen || reply("CREATE")) {
				lfdir = allocdir(ROOTINO, 0, lfmode);
				if (lfdir != 0) {
					if (makeentry(ROOTINO, lfdir, lfname) != 0) {
						if (preen)
							printf(" (CREATED)\n");
					} else {
						freedir(lfdir, ROOTINO);
						lfdir = 0;
						if (preen)
							printf("\n");
					}
				}
			}
		}
		if (lfdir == 0) {
			pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
			printf("\n\n");
			return (0);
		}
	}
	dp = ginode(lfdir);
	if (!DIRCT(dp)) {
		pfatal("lost+found IS NOT A DIRECTORY");
		if (reply("REALLOCATE") == 0)
			return (0);
		oldlfdir = lfdir;
		if ((lfdir = allocdir(ROOTINO, 0, lfmode)) == 0) {
			pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
			return (0);
		}
		idesc.id_type = DATA;
		idesc.id_func = chgino;
		idesc.id_number = ROOTINO;
		idesc.id_parent = lfdir;	/* new inumber for lost+found */
		idesc.id_name = lfname;
		if ((ckinode(ginode(ROOTINO), &idesc) & ALTERED) == 0) {
			pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
			return (0);
		}
		inodirty();
		idesc.id_type = ADDR;
		idesc.id_func = pass4check;
		idesc.id_number = oldlfdir;
		adjust(&idesc, lncntp[oldlfdir] + 1);
		lncntp[oldlfdir] = 0;
		dp = ginode(lfdir);
	}
	if (statemap[lfdir] != DFOUND) {
		pfatal("SORRY. NO lost+found DIRECTORY\n\n");
		return (0);
	}
	len = strlen(lfname);
	bcopy(lfname, pathp, len + 1);
	pathp += len;
	len = lftempname(tempname, orphan);
	if (makeentry(lfdir, orphan, tempname) == 0) {
		pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
		printf("\n\n");
		return (0);
	}
	lncntp[orphan]--;
	*pathp++ = '/';
	bcopy(tempname, pathp, len + 1);
	pathp += len;
	if (lostdir) {
		dp = ginode(orphan);
		idesc.id_type = DATA;
		idesc.id_func = chgino;
		idesc.id_number = orphan;
		idesc.id_fix = DONTKNOW;
		idesc.id_name = "..";
		idesc.id_parent = lfdir;	/* new value for ".." */
		(void)ckinode(dp, &idesc);
		dp = ginode(lfdir);
		dp->di_nlink++;
		inodirty();
		lncntp[lfdir]++;
		pwarn("DIR I=%u CONNECTED. ", orphan);
		printf("PARENT WAS I=%u\n", pdir);
		if (preen == 0)
			printf("\n");
	}
	return (1);
}

/*
 * make an entry in a directory
 */
makeentry(parent, ino, name)
	ino_t parent, ino;
	char *name;
{
	DINODE *dp;
	struct inodesc idesc;
	
	if (parent < ROOTINO || parent >= imax || ino < ROOTINO || ino >= imax)
		return (0);
	bzero(&idesc, sizeof(struct inodesc));
	idesc.id_type = DATA;
	idesc.id_func = mkentry;
	idesc.id_number = parent;
	idesc.id_parent = ino;	/* this is the inode to enter */
	idesc.id_fix = DONTKNOW;
	idesc.id_name = name;
	dp = ginode(parent);
	if (dp->di_size % DIRBLKSIZ) {
		dp->di_size = roundup(dp->di_size, DIRBLKSIZ);
		inodirty();
	}
	if ((ckinode(dp, &idesc) & ALTERED) != 0)
		return (1);
	if (expanddir(dp) == 0)
		return (0);
	return (ckinode(dp, &idesc) & ALTERED);
}

/*
 * Attempt to expand the size of a directory
 */
expanddir(dp)
	register DINODE *dp;
{
	daddr_t lastbn, newblk;
	register BUFAREA *bp;
	char *cp, firstblk[DIRBLKSIZ];

	lastbn = lblkno(&sblock, dp->di_size);
	if (lastbn >= NDADDR - 1)
		return (0);
	if ((newblk = allocblk(sblock.fs_frag)) == 0)
		return (0);
	dp->di_db[lastbn + 1] = dp->di_db[lastbn];
	dp->di_db[lastbn] = newblk;
	dp->di_size += sblock.fs_bsize;
	dp->di_blocks += btodb(sblock.fs_bsize);
	bp = getdirblk(dp->di_db[lastbn + 1],
		dblksize(&sblock, dp, lastbn + 1));
	if (bp->b_errs != NULL)
		goto bad;
	bcopy(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
	bp = getdirblk(newblk, sblock.fs_bsize);
	if (bp->b_errs != NULL)
		goto bad;
	bcopy(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
	for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
	     cp < &bp->b_un.b_buf[sblock.fs_bsize];
	     cp += DIRBLKSIZ)
		bcopy((char *)&emptydir, cp, sizeof emptydir);
	dirty(bp);
	bp = getdirblk(dp->di_db[lastbn + 1],
		dblksize(&sblock, dp, lastbn + 1));
	if (bp->b_errs != NULL)
		goto bad;
	bcopy((char *)&emptydir, bp->b_un.b_buf, sizeof emptydir);
	pwarn("NO SPACE LEFT IN %s", pathname);
	if (preen)
		printf(" (EXPANDED)\n");
	else if (reply("EXPAND") == 0)
		goto bad;
	dirty(bp);
	inodirty();
	return (1);
bad:
	dp->di_db[lastbn] = dp->di_db[lastbn + 1];
	dp->di_db[lastbn + 1] = 0;
	dp->di_size -= sblock.fs_bsize;
	dp->di_blocks -= btodb(sblock.fs_bsize);
	freeblk(newblk, sblock.fs_frag);
	return (0);
}

/*
 * allocate a new directory
 */
allocdir(parent, request, mode)
	ino_t parent, request;
	int mode;
{
	ino_t ino;
	char *cp;
	DINODE *dp;
	register BUFAREA *bp;

	ino = allocino(request, IFDIR|mode);
	dirhead.dot_ino = ino;
	dirhead.dotdot_ino = parent;
	dp = ginode(ino);
	bp = getdirblk(dp->di_db[0], sblock.fs_fsize);
	if (bp->b_errs != NULL) {
		freeino(ino);
		return (0);
	}
	bcopy((char *)&dirhead, bp->b_un.b_buf, sizeof dirhead);
	for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
	     cp < &bp->b_un.b_buf[sblock.fs_fsize];
	     cp += DIRBLKSIZ)
		bcopy((char *)&emptydir, cp, sizeof emptydir);
	dirty(bp);
	dp->di_nlink = 2;
	inodirty();
	if (ino == ROOTINO) {
		lncntp[ino] = dp->di_nlink;
		return(ino);
	}
	if (statemap[parent] != DSTATE && statemap[parent] != DFOUND) {
		freeino(ino);
		return (0);
	}
	statemap[ino] = statemap[parent];
	if (statemap[ino] == DSTATE) {
		lncntp[ino] = dp->di_nlink;
		lncntp[parent]++;
	}
	dp = ginode(parent);
	dp->di_nlink++;
	inodirty();
	return (ino);
}

/*
 * free a directory inode
 */
freedir(ino, parent)
	ino_t ino, parent;
{
	DINODE *dp;

	if (ino != parent) {
		dp = ginode(parent);
		dp->di_nlink--;
		inodirty();
	}
	freeino(ino);
}

/*
 * generate a temporary name for the lost+found directory.
 */
lftempname(bufp, ino)
	char *bufp;
	ino_t ino;
{
	register ino_t in;
	register char *cp;
	int namlen;

	cp = bufp + 2;
	for (in = imax; in > 0; in /= 10)
		cp++;
	*--cp = 0;
	namlen = cp - bufp;
	in = ino;
	while (cp > bufp) {
		*--cp = (in % 10) + '0';
		in /= 10;
	}
	*cp = '#';
	return (namlen);
}

/*
 * Get a directory block.
 * Insure that it is held until another is requested.
 */
BUFAREA *
getdirblk(blkno, size)
	daddr_t blkno;
	long size;
{
	static BUFAREA *pbp = 0;

	if (pbp != 0)
		pbp->b_flags &= ~B_INUSE;
	pbp = getdatablk(blkno, size);
	return (pbp);
}
Commit	Line	Data
76797561 DF	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
250baf55	7	#ifndef lint
c689da7b	8	static char sccsid[] = "@(#)dir.c 5.5 (Berkeley) %G%";
76797561	9	#endif not lint
250baf55 KM	10
	11	#include <sys/param.h>
	12	#include <sys/inode.h>
	13	#include <sys/fs.h>
	14	#define KERNEL
	15	#include <sys/dir.h>
	16	#undef KERNEL
	17	#include "fsck.h"
	18
	19	#define MINDIRSIZE (sizeof (struct dirtemplate))
	20
	21	char *endpathname = &pathname[BUFSIZ - 2];
	22	char *lfname = "lost+found";
c689da7b	23	int lfmode = 01777;
3e2a23ca	24	struct dirtemplate emptydir = { 0, DIRBLKSIZ };
ebd05fde	25	struct dirtemplate dirhead = { 0, 12, 1, ".", 0, DIRBLKSIZ - 12, 2, ".." };
250baf55 KM	26
250baf55 KM	27	DIRECT *fsck_readdir();
adc5a10c	28	BUFAREA *getdirblk();
250baf55 KM	29
	30	descend(parentino, inumber)
	31	struct inodesc *parentino;
	32	ino_t inumber;
	33	{
	34	register DINODE *dp;
	35	struct inodesc curino;
	36
	37	bzero((char *)&curino, sizeof(struct inodesc));
993a756c KM	38	if (statemap[inumber] != DSTATE)
	39	errexit("BAD INODE %d TO DESCEND", statemap[inumber]);
	40	statemap[inumber] = DFOUND;
39c18287	41	dp = ginode(inumber);
250baf55 KM	42	if (dp->di_size == 0) {
	43	direrr(inumber, "ZERO LENGTH DIRECTORY");
	44	if (reply("REMOVE") == 1)
993a756c	45	statemap[inumber] = DCLEAR;
250baf55 KM	46	return;
	47	}
	48	if (dp->di_size < MINDIRSIZE) {
	49	direrr(inumber, "DIRECTORY TOO SHORT");
	50	dp->di_size = MINDIRSIZE;
	51	if (reply("FIX") == 1)
	52	inodirty();
	53	}
f4f8f56a KM	54	if ((dp->di_size & (DIRBLKSIZ - 1)) != 0) {
	55	pwarn("DIRECTORY %s: LENGTH %d NOT MULTIPLE OF %d",
	56	pathname, dp->di_size, DIRBLKSIZ);
	57	dp->di_size = roundup(dp->di_size, DIRBLKSIZ);
	58	if (preen)
	59	printf(" (ADJUSTED)\n");
	60	if (preen \|\| reply("ADJUST") == 1)
	61	inodirty();
	62	}
250baf55 KM	63	curino.id_type = DATA;
	64	curino.id_func = parentino->id_func;
	65	curino.id_parent = parentino->id_number;
	66	curino.id_number = inumber;
250baf55	67	(void)ckinode(dp, &curino);
315f1422 KM	68	if (curino.id_entryno < 2) {
	69	direrr(inumber, "NULL DIRECTORY");
	70	if (reply("REMOVE") == 1)
	71	statemap[inumber] = DCLEAR;
	72	}
250baf55 KM	73	}
	74
	75	dirscan(idesc)
	76	register struct inodesc *idesc;
	77	{
	78	register DIRECT *dp;
adc5a10c	79	register BUFAREA *bp;
250baf55 KM	80	int dsize, n;
	81	long blksiz;
	82	char dbuf[DIRBLKSIZ];
	83
	84	if (idesc->id_type != DATA)
	85	errexit("wrong type to dirscan %d\n", idesc->id_type);
042f816f KM	86	if (idesc->id_entryno == 0 &&
	87	(idesc->id_filesize & (DIRBLKSIZ - 1)) != 0)
	88	idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ);
250baf55 KM	89	blksiz = idesc->id_numfrags * sblock.fs_fsize;
	90	if (outrange(idesc->id_blkno, idesc->id_numfrags)) {
	91	idesc->id_filesize -= blksiz;
	92	return (SKIP);
	93	}
	94	idesc->id_loc = 0;
	95	for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
	96	dsize = dp->d_reclen;
	97	bcopy((char *)dp, dbuf, dsize);
	98	idesc->id_dirp = (DIRECT *)dbuf;
	99	if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
adc5a10c	100	bp = getdirblk(idesc->id_blkno, blksiz);
315f1422	101	bcopy(dbuf, (char *)dp, dsize);
adc5a10c	102	dirty(bp);
315f1422	103	sbdirty();
250baf55 KM	104	}
	105	if (n & STOP)
	106	return (n);
	107	}
	108	return (idesc->id_filesize > 0 ? KEEPON : STOP);
	109	}
	110
	111	/*
	112	* get next entry in a directory.
	113	*/
	114	DIRECT *
	115	fsck_readdir(idesc)
	116	register struct inodesc *idesc;
	117	{
	118	register DIRECT dp, ndp;
adc5a10c	119	register BUFAREA *bp;
250baf55 KM	120	long size, blksiz;
	121
	122	blksiz = idesc->id_numfrags * sblock.fs_fsize;
adc5a10c	123	bp = getdirblk(idesc->id_blkno, blksiz);
250baf55 KM	124	if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
250baf55 KM	125	idesc->id_loc < blksiz) {
adc5a10c	126	dp = (DIRECT *)(bp->b_un.b_buf + idesc->id_loc);
250baf55 KM	127	if (dircheck(idesc, dp))
	128	goto dpok;
	129	idesc->id_loc += DIRBLKSIZ;
	130	idesc->id_filesize -= DIRBLKSIZ;
	131	dp->d_reclen = DIRBLKSIZ;
	132	dp->d_ino = 0;
	133	dp->d_namlen = 0;
	134	dp->d_name[0] = '\0';
7718c0e6	135	if (dofix(idesc, "DIRECTORY CORRUPTED"))
adc5a10c	136	dirty(bp);
250baf55 KM	137	return (dp);
	138	}
	139	dpok:
	140	if (idesc->id_filesize <= 0 \|\| idesc->id_loc >= blksiz)
	141	return NULL;
adc5a10c	142	dp = (DIRECT *)(bp->b_un.b_buf + idesc->id_loc);
250baf55 KM	143	idesc->id_loc += dp->d_reclen;
	144	idesc->id_filesize -= dp->d_reclen;
	145	if ((idesc->id_loc % DIRBLKSIZ) == 0)
	146	return (dp);
adc5a10c	147	ndp = (DIRECT *)(bp->b_un.b_buf + idesc->id_loc);
250baf55 KM	148	if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
	149	dircheck(idesc, ndp) == 0) {
	150	size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
	151	dp->d_reclen += size;
	152	idesc->id_loc += size;
	153	idesc->id_filesize -= size;
7718c0e6	154	if (dofix(idesc, "DIRECTORY CORRUPTED"))
adc5a10c	155	dirty(bp);
250baf55 KM	156	}
	157	return (dp);
	158	}
	159
	160	/*
	161	* Verify that a directory entry is valid.
	162	* This is a superset of the checks made in the kernel.
	163	*/
	164	dircheck(idesc, dp)
	165	struct inodesc *idesc;
	166	register DIRECT *dp;
	167	{
	168	register int size;
	169	register char *cp;
	170	int spaceleft;
	171
	172	size = DIRSIZ(dp);
	173	spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
	174	if (dp->d_ino < imax &&
	175	dp->d_reclen != 0 &&
	176	dp->d_reclen <= spaceleft &&
	177	(dp->d_reclen & 0x3) == 0 &&
	178	dp->d_reclen >= size &&
	179	idesc->id_filesize >= size &&
	180	dp->d_namlen <= MAXNAMLEN) {
	181	if (dp->d_ino == 0)
	182	return (1);
	183	for (cp = dp->d_name, size = 0; size < dp->d_namlen; size++)
	184	if (cp == 0 \|\| (cp++ & 0200))
	185	return (0);
	186	if (*cp == 0)
	187	return (1);
	188	}
	189	return (0);
	190	}
	191
	192	direrr(ino, s)
	193	ino_t ino;
	194	char *s;
	195	{
	196	register DINODE *dp;
	197
	198	pwarn("%s ", s);
	199	pinode(ino);
	200	printf("\n");
39c18287 KM	201	if (ino < ROOTINO \|\| ino > imax) {
	202	pfatal("NAME=%s\n", pathname);
	203	return;
	204	}
	205	dp = ginode(ino);
	206	if (ftypeok(dp))
7718c0e6	207	pfatal("%s=%s\n", DIRCT(dp) ? "DIR" : "FILE", pathname);
250baf55 KM	208	else
	209	pfatal("NAME=%s\n", pathname);
	210	}
	211
	212	adjust(idesc, lcnt)
	213	register struct inodesc *idesc;
	214	short lcnt;
	215	{
	216	register DINODE *dp;
	217
39c18287	218	dp = ginode(idesc->id_number);
250baf55 KM	219	if (dp->di_nlink == lcnt) {
	220	if (linkup(idesc->id_number, (ino_t)0) == 0)
	221	clri(idesc, "UNREF", 0);
993a756c	222	} else {
7718c0e6 KM	223	pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
7718c0e6 KM	224	(DIRCT(dp) ? "DIR" : "FILE"));
250baf55 KM	225	pinode(idesc->id_number);
	226	printf(" COUNT %d SHOULD BE %d",
	227	dp->di_nlink, dp->di_nlink-lcnt);
	228	if (preen) {
	229	if (lcnt < 0) {
	230	printf("\n");
7718c0e6	231	pfatal("LINK COUNT INCREASING");
250baf55 KM	232	}
	233	printf(" (ADJUSTED)\n");
	234	}
	235	if (preen \|\| reply("ADJUST") == 1) {
	236	dp->di_nlink -= lcnt;
	237	inodirty();
	238	}
	239	}
	240	}
	241
	242	mkentry(idesc)
	243	struct inodesc *idesc;
	244	{
	245	register DIRECT *dirp = idesc->id_dirp;
	246	DIRECT newent;
	247	int newlen, oldlen;
	248
	249	newent.d_namlen = 11;
	250	newlen = DIRSIZ(&newent);
	251	if (dirp->d_ino != 0)
	252	oldlen = DIRSIZ(dirp);
	253	else
	254	oldlen = 0;
	255	if (dirp->d_reclen - oldlen < newlen)
	256	return (KEEPON);
	257	newent.d_reclen = dirp->d_reclen - oldlen;
	258	dirp->d_reclen = oldlen;
	259	dirp = (struct direct )(((char )dirp) + oldlen);
	260	dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */
	261	dirp->d_reclen = newent.d_reclen;
ebd05fde KM	262	dirp->d_namlen = strlen(idesc->id_name);
ebd05fde KM	263	bcopy(idesc->id_name, dirp->d_name, dirp->d_namlen + 1);
250baf55 KM	264	return (ALTERED\|STOP);
	265	}
	266
59e3daa2	267	chgino(idesc)
250baf55 KM	268	struct inodesc *idesc;
	269	{
	270	register DIRECT *dirp = idesc->id_dirp;
	271
59e3daa2 KM	272	if (bcmp(dirp->d_name, idesc->id_name, dirp->d_namlen + 1))
	273	return (KEEPON);
	274	dirp->d_ino = idesc->id_parent;;
	275	return (ALTERED\|STOP);
250baf55 KM	276	}
	277
	278	linkup(orphan, pdir)
	279	ino_t orphan;
	280	ino_t pdir;
	281	{
	282	register DINODE *dp;
	283	int lostdir, len;
ebd05fde	284	ino_t oldlfdir;
250baf55	285	struct inodesc idesc;
ebd05fde	286	char tempname[BUFSIZ];
59e3daa2	287	extern int pass4check();
250baf55 KM	288
250baf55 KM	289	bzero((char *)&idesc, sizeof(struct inodesc));
39c18287	290	dp = ginode(orphan);
7718c0e6	291	lostdir = DIRCT(dp);
250baf55 KM	292	pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
	293	pinode(orphan);
	294	if (preen && dp->di_size == 0)
	295	return (0);
	296	if (preen)
	297	printf(" (RECONNECTED)\n");
	298	else
	299	if (reply("RECONNECT") == 0)
	300	return (0);
	301	pathp = pathname;
	302	*pathp++ = '/';
	303	*pathp = '\0';
	304	if (lfdir == 0) {
39c18287	305	dp = ginode(ROOTINO);
7718c0e6	306	idesc.id_name = lfname;
250baf55 KM	307	idesc.id_type = DATA;
	308	idesc.id_func = findino;
	309	idesc.id_number = ROOTINO;
315f1422	310	if ((ckinode(dp, &idesc) & FOUND) != 0) {
ebd05fde KM	311	lfdir = idesc.id_parent;
	312	} else {
	313	pwarn("NO lost+found DIRECTORY");
	314	if (preen \|\| reply("CREATE")) {
c689da7b	315	lfdir = allocdir(ROOTINO, 0, lfmode);
ca1a30be KM	316	if (lfdir != 0) {
ca1a30be KM	317	if (makeentry(ROOTINO, lfdir, lfname) != 0) {
ebd05fde KM	318	if (preen)
	319	printf(" (CREATED)\n");
	320	} else {
ca1a30be KM	321	freedir(lfdir, ROOTINO);
ca1a30be KM	322	lfdir = 0;
ebd05fde KM	323	if (preen)
	324	printf("\n");
	325	}
	326	}
	327	}
	328	}
39c18287	329	if (lfdir == 0) {
ebd05fde	330	pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
250baf55 KM	331	printf("\n\n");
	332	return (0);
	333	}
	334	}
39c18287	335	dp = ginode(lfdir);
59e3daa2 KM	336	if (!DIRCT(dp)) {
	337	pfatal("lost+found IS NOT A DIRECTORY");
	338	if (reply("REALLOCATE") == 0)
	339	return (0);
	340	oldlfdir = lfdir;
c689da7b	341	if ((lfdir = allocdir(ROOTINO, 0, lfmode)) == 0) {
59e3daa2 KM	342	pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
	343	return (0);
	344	}
	345	idesc.id_type = DATA;
	346	idesc.id_func = chgino;
	347	idesc.id_number = ROOTINO;
	348	idesc.id_parent = lfdir; /* new inumber for lost+found */
	349	idesc.id_name = lfname;
	350	if ((ckinode(ginode(ROOTINO), &idesc) & ALTERED) == 0) {
	351	pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
	352	return (0);
	353	}
	354	inodirty();
	355	idesc.id_type = ADDR;
	356	idesc.id_func = pass4check;
	357	idesc.id_number = oldlfdir;
	358	adjust(&idesc, lncntp[oldlfdir] + 1);
	359	lncntp[oldlfdir] = 0;
	360	dp = ginode(lfdir);
	361	}
	362	if (statemap[lfdir] != DFOUND) {
	363	pfatal("SORRY. NO lost+found DIRECTORY\n\n");
250baf55 KM	364	return (0);
250baf55 KM	365	}
250baf55 KM	366	len = strlen(lfname);
	367	bcopy(lfname, pathp, len + 1);
	368	pathp += len;
ca1a30be KM	369	len = lftempname(tempname, orphan);
ca1a30be KM	370	if (makeentry(lfdir, orphan, tempname) == 0) {
250baf55 KM	371	pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
	372	printf("\n\n");
	373	return (0);
	374	}
	375	lncntp[orphan]--;
	376	*pathp++ = '/';
2c4b8d40	377	bcopy(tempname, pathp, len + 1);
ebd05fde	378	pathp += len;
250baf55 KM	379	if (lostdir) {
	380	dp = ginode(orphan);
	381	idesc.id_type = DATA;
59e3daa2	382	idesc.id_func = chgino;
250baf55	383	idesc.id_number = orphan;
250baf55	384	idesc.id_fix = DONTKNOW;
59e3daa2 KM	385	idesc.id_name = "..";
59e3daa2 KM	386	idesc.id_parent = lfdir; /* new value for ".." */
250baf55	387	(void)ckinode(dp, &idesc);
39c18287 KM	388	dp = ginode(lfdir);
	389	dp->di_nlink++;
	390	inodirty();
	391	lncntp[lfdir]++;
250baf55 KM	392	pwarn("DIR I=%u CONNECTED. ", orphan);
	393	printf("PARENT WAS I=%u\n", pdir);
	394	if (preen == 0)
	395	printf("\n");
	396	}
	397	return (1);
	398	}
	399
3e2a23ca KM	400	/*
	401	* make an entry in a directory
	402	*/
ca1a30be KM	403	makeentry(parent, ino, name)
	404	ino_t parent, ino;
	405	char *name;
3e2a23ca	406	{
ca1a30be KM	407	DINODE *dp;
ca1a30be KM	408	struct inodesc idesc;
3e2a23ca	409
ca1a30be KM	410	if (parent < ROOTINO \|\| parent >= imax \|\| ino < ROOTINO \|\| ino >= imax)
	411	return (0);
	412	bzero(&idesc, sizeof(struct inodesc));
	413	idesc.id_type = DATA;
	414	idesc.id_func = mkentry;
	415	idesc.id_number = parent;
	416	idesc.id_parent = ino; /* this is the inode to enter */
	417	idesc.id_fix = DONTKNOW;
	418	idesc.id_name = name;
	419	dp = ginode(parent);
042f816f KM	420	if (dp->di_size % DIRBLKSIZ) {
	421	dp->di_size = roundup(dp->di_size, DIRBLKSIZ);
	422	inodirty();
	423	}
ca1a30be	424	if ((ckinode(dp, &idesc) & ALTERED) != 0)
3e2a23ca KM	425	return (1);
	426	if (expanddir(dp) == 0)
	427	return (0);
ca1a30be	428	return (ckinode(dp, &idesc) & ALTERED);
3e2a23ca KM	429	}
	430
	431	/*
	432	* Attempt to expand the size of a directory
	433	*/
	434	expanddir(dp)
	435	register DINODE *dp;
	436	{
	437	daddr_t lastbn, newblk;
adc5a10c	438	register BUFAREA *bp;
3e2a23ca KM	439	char *cp, firstblk[DIRBLKSIZ];
	440
	441	lastbn = lblkno(&sblock, dp->di_size);
	442	if (lastbn >= NDADDR - 1)
	443	return (0);
	444	if ((newblk = allocblk(sblock.fs_frag)) == 0)
	445	return (0);
	446	dp->di_db[lastbn + 1] = dp->di_db[lastbn];
	447	dp->di_db[lastbn] = newblk;
	448	dp->di_size += sblock.fs_bsize;
	449	dp->di_blocks += btodb(sblock.fs_bsize);
adc5a10c KM	450	bp = getdirblk(dp->di_db[lastbn + 1],
	451	dblksize(&sblock, dp, lastbn + 1));
	452	if (bp->b_errs != NULL)
3e2a23ca	453	goto bad;
adc5a10c KM	454	bcopy(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
	455	bp = getdirblk(newblk, sblock.fs_bsize);
	456	if (bp->b_errs != NULL)
3e2a23ca	457	goto bad;
adc5a10c KM	458	bcopy(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
	459	for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
	460	cp < &bp->b_un.b_buf[sblock.fs_bsize];
3e2a23ca KM	461	cp += DIRBLKSIZ)
3e2a23ca KM	462	bcopy((char *)&emptydir, cp, sizeof emptydir);
adc5a10c KM	463	dirty(bp);
	464	bp = getdirblk(dp->di_db[lastbn + 1],
	465	dblksize(&sblock, dp, lastbn + 1));
	466	if (bp->b_errs != NULL)
3e2a23ca	467	goto bad;
adc5a10c	468	bcopy((char *)&emptydir, bp->b_un.b_buf, sizeof emptydir);
3e2a23ca KM	469	pwarn("NO SPACE LEFT IN %s", pathname);
	470	if (preen)
	471	printf(" (EXPANDED)\n");
	472	else if (reply("EXPAND") == 0)
	473	goto bad;
adc5a10c	474	dirty(bp);
3e2a23ca KM	475	inodirty();
	476	return (1);
	477	bad:
	478	dp->di_db[lastbn] = dp->di_db[lastbn + 1];
	479	dp->di_db[lastbn + 1] = 0;
	480	dp->di_size -= sblock.fs_bsize;
	481	dp->di_blocks -= btodb(sblock.fs_bsize);
	482	freeblk(newblk, sblock.fs_frag);
	483	return (0);
	484	}
	485
ebd05fde KM	486	/*
	487	* allocate a new directory
	488	*/
c689da7b	489	allocdir(parent, request, mode)
ebd05fde	490	ino_t parent, request;
c689da7b	491	int mode;
ebd05fde KM	492	{
	493	ino_t ino;
	494	char *cp;
	495	DINODE *dp;
adc5a10c	496	register BUFAREA *bp;
ebd05fde	497
c689da7b	498	ino = allocino(request, IFDIR\|mode);
ebd05fde KM	499	dirhead.dot_ino = ino;
	500	dirhead.dotdot_ino = parent;
	501	dp = ginode(ino);
adc5a10c KM	502	bp = getdirblk(dp->di_db[0], sblock.fs_fsize);
adc5a10c KM	503	if (bp->b_errs != NULL) {
ebd05fde KM	504	freeino(ino);
	505	return (0);
	506	}
adc5a10c KM	507	bcopy((char *)&dirhead, bp->b_un.b_buf, sizeof dirhead);
	508	for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
	509	cp < &bp->b_un.b_buf[sblock.fs_fsize];
ebd05fde KM	510	cp += DIRBLKSIZ)
ebd05fde KM	511	bcopy((char *)&emptydir, cp, sizeof emptydir);
adc5a10c	512	dirty(bp);
ebd05fde KM	513	dp->di_nlink = 2;
	514	inodirty();
	515	if (ino == ROOTINO) {
	516	lncntp[ino] = dp->di_nlink;
	517	return(ino);
	518	}
	519	if (statemap[parent] != DSTATE && statemap[parent] != DFOUND) {
	520	freeino(ino);
	521	return (0);
	522	}
	523	statemap[ino] = statemap[parent];
	524	if (statemap[ino] == DSTATE) {
	525	lncntp[ino] = dp->di_nlink;
	526	lncntp[parent]++;
	527	}
	528	dp = ginode(parent);
	529	dp->di_nlink++;
	530	inodirty();
	531	return (ino);
	532	}
	533
	534	/*
	535	* free a directory inode
	536	*/
	537	freedir(ino, parent)
	538	ino_t ino, parent;
	539	{
	540	DINODE *dp;
	541
	542	if (ino != parent) {
	543	dp = ginode(parent);
	544	dp->di_nlink--;
	545	inodirty();
	546	}
	547	freeino(ino);
	548	}
	549
250baf55 KM	550	/*
	551	* generate a temporary name for the lost+found directory.
	552	*/
	553	lftempname(bufp, ino)
	554	char *bufp;
	555	ino_t ino;
	556	{
	557	register ino_t in;
	558	register char *cp;
	559	int namlen;
	560
	561	cp = bufp + 2;
	562	for (in = imax; in > 0; in /= 10)
	563	cp++;
	564	*--cp = 0;
	565	namlen = cp - bufp;
	566	in = ino;
	567	while (cp > bufp) {
	568	*--cp = (in % 10) + '0';
	569	in /= 10;
	570	}
	571	*cp = '#';
	572	return (namlen);
	573	}
adc5a10c KM	574
	575	/*
	576	* Get a directory block.
	577	* Insure that it is held until another is requested.
	578	*/
	579	BUFAREA *
	580	getdirblk(blkno, size)
	581	daddr_t blkno;
	582	long size;
	583	{
	584	static BUFAREA *pbp = 0;
	585
	586	if (pbp != 0)
	587	pbp->b_flags &= ~B_INUSE;
	588	pbp = getdatablk(blkno, size);
	589	return (pbp);
	590	}