[unix-history] / usr / src / sbin / fsck / inode.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[] = "@(#)inode.c	5.8 (Berkeley) %G%";
#endif not lint

#include <sys/param.h>
#include <sys/time.h>
#include <sys/vnode.h>
#include <ufs/inode.h>
#include <ufs/fs.h>
#include <ufs/dir.h>
#include <pwd.h>
#include "fsck.h"

BUFAREA *pbp = 0;

ckinode(dp, idesc)
	DINODE *dp;
	register struct inodesc *idesc;
{
	register daddr_t *ap;
	int ret, n, ndb, offset;
	DINODE dino;

	idesc->id_fix = DONTKNOW;
	idesc->id_entryno = 0;
	idesc->id_filesize = dp->di_size;
	if (SPECIAL(dp))
		return (KEEPON);
	dino = *dp;
	ndb = howmany(dino.di_size, sblock.fs_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.fs_frag;
		if (*ap == 0)
			continue;
		idesc->id_blkno = *ap;
		if (idesc->id_type == ADDR)
			ret = (*idesc->id_func)(idesc);
		else
			ret = dirscan(idesc);
		if (ret & STOP)
			return (ret);
	}
	idesc->id_numfrags = sblock.fs_frag;
	for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
		if (*ap) {
			idesc->id_blkno = *ap;
			ret = iblock(idesc, n,
				dino.di_size - sblock.fs_bsize * NDADDR);
			if (ret & STOP)
				return (ret);
		}
	}
	return (KEEPON);
}

iblock(idesc, ilevel, isize)
	struct inodesc *idesc;
	register ilevel;
	long isize;
{
	register daddr_t *ap;
	register daddr_t *aplim;
	int i, n, (*func)(), nif, sizepb;
	register BUFAREA *bp;
	char buf[BUFSIZ];
	extern int dirscan(), pass1check();

	if (idesc->id_type == ADDR) {
		func = idesc->id_func;
		if (((n = (*func)(idesc)) & KEEPON) == 0)
			return (n);
	} else
		func = dirscan;
	if (outrange(idesc->id_blkno, idesc->id_numfrags)) /* protect thyself */
		return (SKIP);
	bp = getdatablk(idesc->id_blkno, sblock.fs_bsize);
	ilevel--;
	for (sizepb = sblock.fs_bsize, i = 0; i < ilevel; i++)
		sizepb *= NINDIR(&sblock);
	nif = isize / sizepb + 1;
	if (nif > NINDIR(&sblock))
		nif = NINDIR(&sblock);
	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=%d",
				idesc->id_number);
			if (dofix(idesc, buf)) {
				*ap = 0;
				dirty(bp);
			}
		}
		flush(&dfile, bp);
	}
	aplim = &bp->b_un.b_indir[nif];
	for (ap = bp->b_un.b_indir, i = 1; ap < aplim; ap++, i++) {
		if (*ap) {
			idesc->id_blkno = *ap;
			if (ilevel > 0)
				n = iblock(idesc, ilevel, isize - i * sizepb);
			else
				n = (*func)(idesc);
			if (n & STOP) {
				bp->b_flags &= ~B_INUSE;
				return (n);
			}
		}
	}
	bp->b_flags &= ~B_INUSE;
	return (KEEPON);
}

outrange(blk, cnt)
	daddr_t blk;
	int cnt;
{
	register int c;

	if ((unsigned)(blk+cnt) > fmax)
		return (1);
	c = dtog(&sblock, blk);
	if (blk < cgdmin(&sblock, c)) {
		if ((blk+cnt) > cgsblock(&sblock, c)) {
			if (debug) {
				printf("blk %d < cgdmin %d;",
				    blk, cgdmin(&sblock, c));
				printf(" blk+cnt %d > cgsbase %d\n",
				    blk+cnt, cgsblock(&sblock, c));
			}
			return (1);
		}
	} else {
		if ((blk+cnt) > cgbase(&sblock, c+1)) {
			if (debug)  {
				printf("blk %d >= cgdmin %d;",
				    blk, cgdmin(&sblock, c));
				printf(" blk+cnt %d > sblock.fs_fpg %d\n",
				    blk+cnt, sblock.fs_fpg);
			}
			return (1);
		}
	}
	return (0);
}

DINODE *
ginode(inumber)
	ino_t inumber;
{
	daddr_t iblk;
	static ino_t startinum = 0;	/* blk num of first in raw area */

	if (inumber < ROOTINO || inumber > imax)
		errexit("bad inode number %d to ginode\n", inumber);
	if (startinum == 0 ||
	    inumber < startinum || inumber >= startinum + INOPB(&sblock)) {
		iblk = itod(&sblock, inumber);
		if (pbp != 0)
			pbp->b_flags &= ~B_INUSE;
		pbp = getdatablk(iblk, sblock.fs_bsize);
		startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
	}
	return (&pbp->b_un.b_dinode[inumber % INOPB(&sblock)]);
}

inodirty()
{
	
	dirty(pbp);
}

clri(idesc, s, flg)
	register struct inodesc *idesc;
	char *s;
	int flg;
{
	register DINODE *dp;

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

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

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

findino(idesc)
	struct inodesc *idesc;
{
	register 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 <= imax) {
		idesc->id_parent = dirp->d_ino;
		return (STOP|FOUND);
	}
	return (KEEPON);
}

pinode(ino)
	ino_t ino;
{
	register DINODE *dp;
	register char *p;
	struct passwd *pw;
	char *ctime();

	printf(" I=%u ", ino);
	if (ino < ROOTINO || ino > imax)
		return;
	dp = ginode(ino);
	printf(" OWNER=");
	if ((pw = getpwuid((int)dp->di_uid)) != 0)
		printf("%s ", pw->pw_name);
	else
		printf("%d ", dp->di_uid);
	printf("MODE=%o\n", dp->di_mode);
	if (preen)
		printf("%s: ", devname);
	printf("SIZE=%ld ", dp->di_size);
	p = ctime(&dp->di_mtime);
	printf("MTIME=%12.12s %4.4s ", p+4, p+20);
}

blkerr(ino, s, blk)
	ino_t ino;
	char *s;
	daddr_t blk;
{

	pfatal("%ld %s I=%u", blk, s, ino);
	printf("\n");
	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(request, type)
	ino_t request;
	int type;
{
	register ino_t ino;
	register DINODE *dp;

	if (request == 0)
		request = ROOTINO;
	else if (statemap[request] != USTATE)
		return (0);
	for (ino = request; ino < imax; ino++)
		if (statemap[ino] == USTATE)
			break;
	if (ino == imax)
		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(1);
	if (dp->di_db[0] == 0) {
		statemap[ino] = USTATE;
		return (0);
	}
	dp->di_mode = type;
	time(&dp->di_atime);
	dp->di_mtime = dp->di_ctime = dp->di_atime;
	dp->di_size = sblock.fs_fsize;
	dp->di_blocks = btodb(sblock.fs_fsize);
	n_files++;
	inodirty();
	return (ino);
}

/*
 * deallocate an inode
 */
freeino(ino)
	ino_t ino;
{
	struct inodesc idesc;
	extern int pass4check();
	DINODE *dp;

	bzero((char *)&idesc, sizeof(struct inodesc));
	idesc.id_type = ADDR;
	idesc.id_func = pass4check;
	idesc.id_number = ino;
	dp = ginode(ino);
	(void)ckinode(dp, &idesc);
	zapino(dp);
	inodirty();
	statemap[ino] = USTATE;
	n_files--;
}
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
7026cd3f	7	#ifndef lint
4d7f4685	8	static char sccsid[] = "@(#)inode.c 5.8 (Berkeley) %G%";
76797561	9	#endif not lint
7026cd3f KM	10
7026cd3f KM	11	#include <sys/param.h>
4d7f4685 KM	12	#include <sys/time.h>
	13	#include <sys/vnode.h>
	14	#include <ufs/inode.h>
	15	#include <ufs/fs.h>
	16	#include <ufs/dir.h>
0086a7e5	17	#include <pwd.h>
7026cd3f KM	18	#include "fsck.h"
7026cd3f KM	19
adc5a10c KM	20	BUFAREA *pbp = 0;
adc5a10c KM	21
7026cd3f KM	22	ckinode(dp, idesc)
	23	DINODE *dp;
	24	register struct inodesc *idesc;
	25	{
	26	register daddr_t *ap;
	27	int ret, n, ndb, offset;
	28	DINODE dino;
	29
7026cd3f KM	30	idesc->id_fix = DONTKNOW;
7026cd3f KM	31	idesc->id_entryno = 0;
f0ed004a	32	idesc->id_filesize = dp->di_size;
f8a97eea KM	33	if (SPECIAL(dp))
	34	return (KEEPON);
	35	dino = *dp;
7026cd3f KM	36	ndb = howmany(dino.di_size, sblock.fs_bsize);
	37	for (ap = &dino.di_db[0]; ap < &dino.di_db[NDADDR]; ap++) {
	38	if (--ndb == 0 && (offset = blkoff(&sblock, dino.di_size)) != 0)
	39	idesc->id_numfrags =
	40	numfrags(&sblock, fragroundup(&sblock, offset));
	41	else
	42	idesc->id_numfrags = sblock.fs_frag;
	43	if (*ap == 0)
	44	continue;
	45	idesc->id_blkno = *ap;
	46	if (idesc->id_type == ADDR)
	47	ret = (*idesc->id_func)(idesc);
	48	else
	49	ret = dirscan(idesc);
	50	if (ret & STOP)
	51	return (ret);
	52	}
	53	idesc->id_numfrags = sblock.fs_frag;
7718c0e6	54	for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
7026cd3f KM	55	if (*ap) {
	56	idesc->id_blkno = *ap;
	57	ret = iblock(idesc, n,
	58	dino.di_size - sblock.fs_bsize * NDADDR);
	59	if (ret & STOP)
	60	return (ret);
	61	}
	62	}
	63	return (KEEPON);
	64	}
	65
	66	iblock(idesc, ilevel, isize)
	67	struct inodesc *idesc;
	68	register ilevel;
	69	long isize;
	70	{
	71	register daddr_t *ap;
	72	register daddr_t *aplim;
7718c0e6	73	int i, n, (*func)(), nif, sizepb;
adc5a10c	74	register BUFAREA *bp;
8f7c3c7e	75	char buf[BUFSIZ];
f10a0ae9	76	extern int dirscan(), pass1check();
7026cd3f KM	77
	78	if (idesc->id_type == ADDR) {
	79	func = idesc->id_func;
	80	if (((n = (*func)(idesc)) & KEEPON) == 0)
	81	return (n);
	82	} else
	83	func = dirscan;
	84	if (outrange(idesc->id_blkno, idesc->id_numfrags)) /* protect thyself */
	85	return (SKIP);
adc5a10c	86	bp = getdatablk(idesc->id_blkno, sblock.fs_bsize);
7026cd3f	87	ilevel--;
7718c0e6 KM	88	for (sizepb = sblock.fs_bsize, i = 0; i < ilevel; i++)
	89	sizepb *= NINDIR(&sblock);
	90	nif = isize / sizepb + 1;
7026cd3f KM	91	if (nif > NINDIR(&sblock))
7026cd3f KM	92	nif = NINDIR(&sblock);
48a66bfb	93	if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) {
adc5a10c KM	94	aplim = &bp->b_un.b_indir[NINDIR(&sblock)];
adc5a10c KM	95	for (ap = &bp->b_un.b_indir[nif]; ap < aplim; ap++) {
48a66bfb KM	96	if (*ap == 0)
48a66bfb KM	97	continue;
9bd38ba8	98	(void)sprintf(buf, "PARTIALLY TRUNCATED INODE I=%d",
8f7c3c7e KM	99	idesc->id_number);
8f7c3c7e KM	100	if (dofix(idesc, buf)) {
48a66bfb	101	*ap = 0;
adc5a10c	102	dirty(bp);
48a66bfb KM	103	}
48a66bfb KM	104	}
adc5a10c	105	flush(&dfile, bp);
48a66bfb	106	}
adc5a10c KM	107	aplim = &bp->b_un.b_indir[nif];
adc5a10c KM	108	for (ap = bp->b_un.b_indir, i = 1; ap < aplim; ap++, i++) {
7026cd3f KM	109	if (*ap) {
	110	idesc->id_blkno = *ap;
	111	if (ilevel > 0)
7718c0e6	112	n = iblock(idesc, ilevel, isize - i * sizepb);
7026cd3f KM	113	else
7026cd3f KM	114	n = (*func)(idesc);
adc5a10c KM	115	if (n & STOP) {
adc5a10c KM	116	bp->b_flags &= ~B_INUSE;
7026cd3f	117	return (n);
adc5a10c	118	}
7026cd3f	119	}
adc5a10c KM	120	}
adc5a10c KM	121	bp->b_flags &= ~B_INUSE;
7026cd3f KM	122	return (KEEPON);
	123	}
	124
	125	outrange(blk, cnt)
	126	daddr_t blk;
	127	int cnt;
	128	{
	129	register int c;
	130
	131	if ((unsigned)(blk+cnt) > fmax)
	132	return (1);
	133	c = dtog(&sblock, blk);
	134	if (blk < cgdmin(&sblock, c)) {
	135	if ((blk+cnt) > cgsblock(&sblock, c)) {
	136	if (debug) {
	137	printf("blk %d < cgdmin %d;",
	138	blk, cgdmin(&sblock, c));
	139	printf(" blk+cnt %d > cgsbase %d\n",
	140	blk+cnt, cgsblock(&sblock, c));
	141	}
	142	return (1);
	143	}
	144	} else {
	145	if ((blk+cnt) > cgbase(&sblock, c+1)) {
	146	if (debug) {
	147	printf("blk %d >= cgdmin %d;",
	148	blk, cgdmin(&sblock, c));
	149	printf(" blk+cnt %d > sblock.fs_fpg %d\n",
	150	blk+cnt, sblock.fs_fpg);
	151	}
	152	return (1);
	153	}
	154	}
	155	return (0);
	156	}
	157
	158	DINODE *
	159	ginode(inumber)
	160	ino_t inumber;
	161	{
	162	daddr_t iblk;
	163	static ino_t startinum = 0; /* blk num of first in raw area */
	164
39c18287 KM	165	if (inumber < ROOTINO \|\| inumber > imax)
39c18287 KM	166	errexit("bad inode number %d to ginode\n", inumber);
7026cd3f KM	167	if (startinum == 0 \|\|
	168	inumber < startinum \|\| inumber >= startinum + INOPB(&sblock)) {
	169	iblk = itod(&sblock, inumber);
adc5a10c KM	170	if (pbp != 0)
	171	pbp->b_flags &= ~B_INUSE;
	172	pbp = getdatablk(iblk, sblock.fs_bsize);
7026cd3f KM	173	startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
7026cd3f KM	174	}
adc5a10c KM	175	return (&pbp->b_un.b_dinode[inumber % INOPB(&sblock)]);
	176	}
	177
	178	inodirty()
	179	{
	180
	181	dirty(pbp);
7026cd3f KM	182	}
	183
	184	clri(idesc, s, flg)
	185	register struct inodesc *idesc;
	186	char *s;
	187	int flg;
	188	{
	189	register DINODE *dp;
	190
39c18287	191	dp = ginode(idesc->id_number);
7026cd3f	192	if (flg == 1) {
7718c0e6	193	pwarn("%s %s", s, DIRCT(dp) ? "DIR" : "FILE");
7026cd3f KM	194	pinode(idesc->id_number);
	195	}
	196	if (preen \|\| reply("CLEAR") == 1) {
	197	if (preen)
	198	printf(" (CLEARED)\n");
	199	n_files--;
	200	(void)ckinode(dp, idesc);
	201	zapino(dp);
	202	statemap[idesc->id_number] = USTATE;
	203	inodirty();
7026cd3f KM	204	}
	205	}
	206
3ad2f081 KM	207	findname(idesc)
	208	struct inodesc *idesc;
	209	{
	210	register DIRECT *dirp = idesc->id_dirp;
	211
	212	if (dirp->d_ino != idesc->id_parent)
	213	return (KEEPON);
	214	bcopy(dirp->d_name, idesc->id_name, dirp->d_namlen + 1);
315f1422	215	return (STOP\|FOUND);
3ad2f081 KM	216	}
3ad2f081 KM	217
7026cd3f KM	218	findino(idesc)
	219	struct inodesc *idesc;
	220	{
	221	register DIRECT *dirp = idesc->id_dirp;
	222
	223	if (dirp->d_ino == 0)
	224	return (KEEPON);
3ad2f081 KM	225	if (strcmp(dirp->d_name, idesc->id_name) == 0 &&
	226	dirp->d_ino >= ROOTINO && dirp->d_ino <= imax) {
	227	idesc->id_parent = dirp->d_ino;
315f1422	228	return (STOP\|FOUND);
7026cd3f KM	229	}
	230	return (KEEPON);
	231	}
	232
	233	pinode(ino)
	234	ino_t ino;
	235	{
	236	register DINODE *dp;
	237	register char *p;
1ccd95ec	238	struct passwd *pw;
7026cd3f KM	239	char *ctime();
	240
	241	printf(" I=%u ", ino);
39c18287	242	if (ino < ROOTINO \|\| ino > imax)
7026cd3f	243	return;
39c18287	244	dp = ginode(ino);
7026cd3f	245	printf(" OWNER=");
1ccd95ec KM	246	if ((pw = getpwuid((int)dp->di_uid)) != 0)
	247	printf("%s ", pw->pw_name);
	248	else
7026cd3f	249	printf("%d ", dp->di_uid);
7026cd3f KM	250	printf("MODE=%o\n", dp->di_mode);
	251	if (preen)
	252	printf("%s: ", devname);
	253	printf("SIZE=%ld ", dp->di_size);
	254	p = ctime(&dp->di_mtime);
	255	printf("MTIME=%12.12s %4.4s ", p+4, p+20);
	256	}
	257
	258	blkerr(ino, s, blk)
	259	ino_t ino;
	260	char *s;
	261	daddr_t blk;
	262	{
	263
	264	pfatal("%ld %s I=%u", blk, s, ino);
	265	printf("\n");
993a756c KM	266	switch (statemap[ino]) {
	267
	268	case FSTATE:
	269	statemap[ino] = FCLEAR;
	270	return;
	271
	272	case DSTATE:
	273	statemap[ino] = DCLEAR;
	274	return;
	275
	276	case FCLEAR:
	277	case DCLEAR:
	278	return;
	279
	280	default:
	281	errexit("BAD STATE %d TO BLKERR", statemap[ino]);
	282	/* NOTREACHED */
	283	}
7026cd3f	284	}
ebd05fde KM	285
	286	/*
	287	* allocate an unused inode
	288	*/
	289	ino_t
	290	allocino(request, type)
	291	ino_t request;
	292	int type;
	293	{
	294	register ino_t ino;
	295	register DINODE *dp;
	296
	297	if (request == 0)
	298	request = ROOTINO;
	299	else if (statemap[request] != USTATE)
	300	return (0);
	301	for (ino = request; ino < imax; ino++)
	302	if (statemap[ino] == USTATE)
	303	break;
	304	if (ino == imax)
	305	return (0);
	306	switch (type & IFMT) {
	307	case IFDIR:
	308	statemap[ino] = DSTATE;
	309	break;
	310	case IFREG:
	311	case IFLNK:
	312	statemap[ino] = FSTATE;
	313	break;
	314	default:
	315	return (0);
	316	}
	317	dp = ginode(ino);
	318	dp->di_db[0] = allocblk(1);
	319	if (dp->di_db[0] == 0) {
	320	statemap[ino] = USTATE;
	321	return (0);
	322	}
	323	dp->di_mode = type;
	324	time(&dp->di_atime);
	325	dp->di_mtime = dp->di_ctime = dp->di_atime;
	326	dp->di_size = sblock.fs_fsize;
	327	dp->di_blocks = btodb(sblock.fs_fsize);
	328	n_files++;
	329	inodirty();
	330	return (ino);
	331	}
	332
	333	/*
	334	* deallocate an inode
	335	*/
	336	freeino(ino)
	337	ino_t ino;
	338	{
	339	struct inodesc idesc;
	340	extern int pass4check();
	341	DINODE *dp;
	342
	343	bzero((char *)&idesc, sizeof(struct inodesc));
	344	idesc.id_type = ADDR;
	345	idesc.id_func = pass4check;
	346	idesc.id_number = ino;
	347	dp = ginode(ino);
	348	(void)ckinode(dp, &idesc);
349	zapino(dp);
350	inodirty();
351	statemap[ino] = USTATE;
352	n_files--;
353	}