[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	5.2 (Berkeley) %G%";
#endif not lint

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

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;
	BUFAREA ib;
	char buf[BUFSIZ];
	extern int 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);
	initbarea(&ib);
	getblk(&ib, idesc->id_blkno, sblock.fs_bsize);
	if (ib.b_errs != NULL)
		return (SKIP);
	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 = &ib.b_un.b_indir[NINDIR(&sblock)];
		for (ap = &ib.b_un.b_indir[nif]; ap < aplim; ap++) {
			if (*ap == 0)
				continue;
			sprintf(buf, "PARTIALLY TRUNCATED INODE I=%d",
				idesc->id_number);
			if (dofix(idesc, buf)) {
				*ap = 0;
				dirty(&ib);
			}
		}
		flush(&dfile, &ib);
	}
	aplim = &ib.b_un.b_indir[nif];
	for (ap = ib.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)
				return (n);
		}
	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);
		getblk(&inoblk, iblk, sblock.fs_bsize);
		startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
	}
	return (&inoblk.b_un.b_dinode[inumber % INOPB(&sblock)]);
}

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);
}

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);
	}
	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
8f7c3c7e	8	static char sccsid[] = "@(#)inode.c 5.2 (Berkeley) %G%";
76797561	9	#endif not lint
7026cd3f	10
1ccd95ec	11	#include <pwd.h>
7026cd3f KM	12	#include <sys/param.h>
	13	#include <sys/inode.h>
	14	#include <sys/fs.h>
	15	#include <sys/dir.h>
	16	#include "fsck.h"
	17
	18	ckinode(dp, idesc)
	19	DINODE *dp;
	20	register struct inodesc *idesc;
	21	{
	22	register daddr_t *ap;
	23	int ret, n, ndb, offset;
	24	DINODE dino;
	25
7026cd3f KM	26	idesc->id_fix = DONTKNOW;
7026cd3f KM	27	idesc->id_entryno = 0;
f0ed004a	28	idesc->id_filesize = dp->di_size;
f8a97eea KM	29	if (SPECIAL(dp))
	30	return (KEEPON);
	31	dino = *dp;
7026cd3f KM	32	ndb = howmany(dino.di_size, sblock.fs_bsize);
	33	for (ap = &dino.di_db[0]; ap < &dino.di_db[NDADDR]; ap++) {
	34	if (--ndb == 0 && (offset = blkoff(&sblock, dino.di_size)) != 0)
	35	idesc->id_numfrags =
	36	numfrags(&sblock, fragroundup(&sblock, offset));
	37	else
	38	idesc->id_numfrags = sblock.fs_frag;
	39	if (*ap == 0)
	40	continue;
	41	idesc->id_blkno = *ap;
	42	if (idesc->id_type == ADDR)
	43	ret = (*idesc->id_func)(idesc);
	44	else
	45	ret = dirscan(idesc);
	46	if (ret & STOP)
	47	return (ret);
	48	}
	49	idesc->id_numfrags = sblock.fs_frag;
7718c0e6	50	for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
7026cd3f KM	51	if (*ap) {
	52	idesc->id_blkno = *ap;
	53	ret = iblock(idesc, n,
	54	dino.di_size - sblock.fs_bsize * NDADDR);
	55	if (ret & STOP)
	56	return (ret);
	57	}
	58	}
	59	return (KEEPON);
	60	}
	61
	62	iblock(idesc, ilevel, isize)
	63	struct inodesc *idesc;
	64	register ilevel;
	65	long isize;
	66	{
	67	register daddr_t *ap;
	68	register daddr_t *aplim;
7718c0e6	69	int i, n, (*func)(), nif, sizepb;
7026cd3f	70	BUFAREA ib;
8f7c3c7e	71	char buf[BUFSIZ];
48a66bfb	72	extern int pass1check();
7026cd3f KM	73
	74	if (idesc->id_type == ADDR) {
	75	func = idesc->id_func;
	76	if (((n = (*func)(idesc)) & KEEPON) == 0)
	77	return (n);
	78	} else
	79	func = dirscan;
	80	if (outrange(idesc->id_blkno, idesc->id_numfrags)) /* protect thyself */
	81	return (SKIP);
	82	initbarea(&ib);
49505034 KM	83	getblk(&ib, idesc->id_blkno, sblock.fs_bsize);
49505034 KM	84	if (ib.b_errs != NULL)
7026cd3f KM	85	return (SKIP);
7026cd3f KM	86	ilevel--;
7718c0e6 KM	87	for (sizepb = sblock.fs_bsize, i = 0; i < ilevel; i++)
	88	sizepb *= NINDIR(&sblock);
	89	nif = isize / sizepb + 1;
7026cd3f KM	90	if (nif > NINDIR(&sblock))
7026cd3f KM	91	nif = NINDIR(&sblock);
48a66bfb KM	92	if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) {
	93	aplim = &ib.b_un.b_indir[NINDIR(&sblock)];
	94	for (ap = &ib.b_un.b_indir[nif]; ap < aplim; ap++) {
	95	if (*ap == 0)
	96	continue;
8f7c3c7e KM	97	sprintf(buf, "PARTIALLY TRUNCATED INODE I=%d",
	98	idesc->id_number);
	99	if (dofix(idesc, buf)) {
48a66bfb KM	100	*ap = 0;
	101	dirty(&ib);
	102	}
	103	}
	104	flush(&dfile, &ib);
	105	}
7026cd3f KM	106	aplim = &ib.b_un.b_indir[nif];
	107	for (ap = ib.b_un.b_indir, i = 1; ap < aplim; ap++, i++)
	108	if (*ap) {
	109	idesc->id_blkno = *ap;
	110	if (ilevel > 0)
7718c0e6	111	n = iblock(idesc, ilevel, isize - i * sizepb);
7026cd3f KM	112	else
	113	n = (*func)(idesc);
	114	if (n & STOP)
	115	return (n);
	116	}
	117	return (KEEPON);
	118	}
	119
	120	outrange(blk, cnt)
	121	daddr_t blk;
	122	int cnt;
	123	{
	124	register int c;
	125
	126	if ((unsigned)(blk+cnt) > fmax)
	127	return (1);
	128	c = dtog(&sblock, blk);
	129	if (blk < cgdmin(&sblock, c)) {
	130	if ((blk+cnt) > cgsblock(&sblock, c)) {
	131	if (debug) {
	132	printf("blk %d < cgdmin %d;",
	133	blk, cgdmin(&sblock, c));
	134	printf(" blk+cnt %d > cgsbase %d\n",
	135	blk+cnt, cgsblock(&sblock, c));
	136	}
	137	return (1);
	138	}
	139	} else {
	140	if ((blk+cnt) > cgbase(&sblock, c+1)) {
	141	if (debug) {
	142	printf("blk %d >= cgdmin %d;",
	143	blk, cgdmin(&sblock, c));
	144	printf(" blk+cnt %d > sblock.fs_fpg %d\n",
	145	blk+cnt, sblock.fs_fpg);
	146	}
	147	return (1);
	148	}
	149	}
	150	return (0);
	151	}
	152
	153	DINODE *
	154	ginode(inumber)
	155	ino_t inumber;
	156	{
	157	daddr_t iblk;
	158	static ino_t startinum = 0; /* blk num of first in raw area */
	159
39c18287 KM	160	if (inumber < ROOTINO \|\| inumber > imax)
39c18287 KM	161	errexit("bad inode number %d to ginode\n", inumber);
7026cd3f KM	162	if (startinum == 0 \|\|
	163	inumber < startinum \|\| inumber >= startinum + INOPB(&sblock)) {
	164	iblk = itod(&sblock, inumber);
49505034	165	getblk(&inoblk, iblk, sblock.fs_bsize);
7026cd3f KM	166	startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
	167	}
	168	return (&inoblk.b_un.b_dinode[inumber % INOPB(&sblock)]);
	169	}
	170
	171	clri(idesc, s, flg)
	172	register struct inodesc *idesc;
	173	char *s;
	174	int flg;
	175	{
	176	register DINODE *dp;
	177
39c18287	178	dp = ginode(idesc->id_number);
7026cd3f	179	if (flg == 1) {
7718c0e6	180	pwarn("%s %s", s, DIRCT(dp) ? "DIR" : "FILE");
7026cd3f KM	181	pinode(idesc->id_number);
	182	}
	183	if (preen \|\| reply("CLEAR") == 1) {
	184	if (preen)
	185	printf(" (CLEARED)\n");
	186	n_files--;
	187	(void)ckinode(dp, idesc);
	188	zapino(dp);
	189	statemap[idesc->id_number] = USTATE;
	190	inodirty();
7026cd3f KM	191	}
	192	}
	193
3ad2f081 KM	194	findname(idesc)
	195	struct inodesc *idesc;
	196	{
	197	register DIRECT *dirp = idesc->id_dirp;
	198
	199	if (dirp->d_ino != idesc->id_parent)
	200	return (KEEPON);
	201	bcopy(dirp->d_name, idesc->id_name, dirp->d_namlen + 1);
	202	return (STOP);
	203	}
	204
7026cd3f KM	205	findino(idesc)
	206	struct inodesc *idesc;
	207	{
	208	register DIRECT *dirp = idesc->id_dirp;
	209
	210	if (dirp->d_ino == 0)
	211	return (KEEPON);
3ad2f081 KM	212	if (strcmp(dirp->d_name, idesc->id_name) == 0 &&
	213	dirp->d_ino >= ROOTINO && dirp->d_ino <= imax) {
	214	idesc->id_parent = dirp->d_ino;
7026cd3f KM	215	return (STOP);
	216	}
	217	return (KEEPON);
	218	}
	219
	220	pinode(ino)
	221	ino_t ino;
	222	{
	223	register DINODE *dp;
	224	register char *p;
1ccd95ec	225	struct passwd *pw;
7026cd3f KM	226	char *ctime();
	227
	228	printf(" I=%u ", ino);
39c18287	229	if (ino < ROOTINO \|\| ino > imax)
7026cd3f	230	return;
39c18287	231	dp = ginode(ino);
7026cd3f	232	printf(" OWNER=");
1ccd95ec KM	233	if ((pw = getpwuid((int)dp->di_uid)) != 0)
	234	printf("%s ", pw->pw_name);
	235	else
7026cd3f	236	printf("%d ", dp->di_uid);
7026cd3f KM	237	printf("MODE=%o\n", dp->di_mode);
	238	if (preen)
	239	printf("%s: ", devname);
	240	printf("SIZE=%ld ", dp->di_size);
	241	p = ctime(&dp->di_mtime);
	242	printf("MTIME=%12.12s %4.4s ", p+4, p+20);
	243	}
	244
	245	blkerr(ino, s, blk)
	246	ino_t ino;
	247	char *s;
	248	daddr_t blk;
	249	{
	250
	251	pfatal("%ld %s I=%u", blk, s, ino);
	252	printf("\n");
993a756c KM	253	switch (statemap[ino]) {
	254
	255	case FSTATE:
	256	statemap[ino] = FCLEAR;
	257	return;
	258
	259	case DSTATE:
	260	statemap[ino] = DCLEAR;
	261	return;
	262
	263	case FCLEAR:
	264	case DCLEAR:
	265	return;
	266
	267	default:
	268	errexit("BAD STATE %d TO BLKERR", statemap[ino]);
	269	/* NOTREACHED */
	270	}
7026cd3f	271	}
ebd05fde KM	272
	273	/*
	274	* allocate an unused inode
	275	*/
	276	ino_t
	277	allocino(request, type)
	278	ino_t request;
	279	int type;
	280	{
	281	register ino_t ino;
	282	register DINODE *dp;
	283
	284	if (request == 0)
	285	request = ROOTINO;
	286	else if (statemap[request] != USTATE)
	287	return (0);
	288	for (ino = request; ino < imax; ino++)
	289	if (statemap[ino] == USTATE)
	290	break;
	291	if (ino == imax)
	292	return (0);
	293	switch (type & IFMT) {
	294	case IFDIR:
	295	statemap[ino] = DSTATE;
	296	break;
	297	case IFREG:
	298	case IFLNK:
	299	statemap[ino] = FSTATE;
	300	break;
	301	default:
	302	return (0);
	303	}
	304	dp = ginode(ino);
	305	dp->di_db[0] = allocblk(1);
	306	if (dp->di_db[0] == 0) {
	307	statemap[ino] = USTATE;
	308	return (0);
	309	}
	310	dp->di_mode = type;
	311	time(&dp->di_atime);
	312	dp->di_mtime = dp->di_ctime = dp->di_atime;
	313	dp->di_size = sblock.fs_fsize;
	314	dp->di_blocks = btodb(sblock.fs_fsize);
	315	n_files++;
	316	inodirty();
	317	return (ino);
	318	}
	319
	320	/*
	321	* deallocate an inode
	322	*/
	323	freeino(ino)
	324	ino_t ino;
	325	{
	326	struct inodesc idesc;
	327	extern int pass4check();
	328	DINODE *dp;
	329
	330	bzero((char *)&idesc, sizeof(struct inodesc));
	331	idesc.id_type = ADDR;
	332	idesc.id_func = pass4check;
	333	idesc.id_number = ino;
	334	dp = ginode(ino);
	335	(void)ckinode(dp, &idesc);
336	zapino(dp);
337	inodirty();
338	statemap[ino] = USTATE;
339	n_files--;
340	}