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NetBSD/sbin/fsck_ext2fs/inode.c

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/* $NetBSD: inode.c,v 1.3 1997/10/09 13:19:36 bouyer Exp $ */
/*
* Copyright (c) 1997 Manuel Bouyer.
* 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/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)inode.c 8.5 (Berkeley) 2/8/95";
#else
__RCSID("$NetBSD: inode.c,v 1.3 1997/10/09 13:19:36 bouyer Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
#include <ufs/ext2fs/ext2fs_dir.h>
#include <ufs/ext2fs/ext2fs.h>
#include <ufs/ufs/dinode.h> /* for IFMT & friends */
#ifndef SMALL
#include <pwd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "fsck.h"
#include "fsutil.h"
#include "extern.h"
/*
* CG is stored in fs byte order in memory, so we can't use ino_to_fsba
* here.
*/
#define fsck_ino_to_fsba(fs, x) \
(fs2h32((fs)->e2fs_gd[ino_to_cg(fs, x)].ext2bgd_i_tables) + \
(((x)-1) % (fs)->e2fs.e2fs_ipg)/(fs)->e2fs_ipb)
static ino_t startinum;
static int iblock __P((struct inodesc *, long, u_int64_t));
int
ckinode(dp, idesc)
struct ext2fs_dinode *dp;
struct inodesc *idesc;
{
u_int32_t *ap;
long ret, n, ndb;
struct ext2fs_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 = fs2h32(dp->e2di_size);
mode = fs2h16(dp->e2di_mode) & IFMT;
if (mode == IFBLK || mode == IFCHR || (mode == IFLNK &&
(fs2h32(dp->e2di_size) < EXT2_MAXSYMLINKLEN)))
return (KEEPON);
dino = *dp;
ndb = howmany(fs2h32(dino.e2di_size), sblock.e2fs_bsize);
for (ap = &dino.e2di_blocks[0]; ap < &dino.e2di_blocks[NDADDR];
ap++,ndb--) {
idesc->id_numfrags = 1;
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->e2di_size = h2fs32((ap - &dino.e2di_blocks[0]) *
sblock.e2fs_bsize);
printf(
"YOU MUST RERUN FSCK AFTERWARDS\n");
rerun = 1;
inodirty();
}
}
continue;
}
idesc->id_blkno = fs2h32(*ap);
if (idesc->id_type == ADDR)
ret = (*idesc->id_func)(idesc);
else
ret = dirscan(idesc);
if (ret & STOP)
return (ret);
}
idesc->id_numfrags = 1;
remsize = fs2h32(dino.e2di_size) - sblock.e2fs_bsize * NDADDR;
sizepb = sblock.e2fs_bsize;
for (ap = &dino.e2di_blocks[NDADDR], n = 1; n <= NIADDR; ap++, n++) {
if (*ap) {
idesc->id_blkno = fs2h32(*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->e2di_size = h2fs32(fs2h32(dp->e2di_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(idesc, ilevel, isize)
struct inodesc *idesc;
long ilevel;
u_int64_t isize;
{
daddr_t *ap;
daddr_t *aplim;
struct bufarea *bp;
int i, n, (*func) __P((struct inodesc *)), nif;
u_int64_t sizepb;
char buf[BUFSIZ];
char pathbuf[MAXPATHLEN + 1];
struct ext2fs_dinode *dp;
if (idesc->id_type == ADDR) {
func = idesc->id_func;
if (((n = (*func)(idesc)) & KEEPON) == 0)
return (n);
} else
func = dirscan;
if (chkrange(idesc->id_blkno, idesc->id_numfrags))
return (SKIP);
bp = getdatablk(idesc->id_blkno, sblock.e2fs_bsize);
ilevel--;
for (sizepb = sblock.e2fs_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 = fs2h32(*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->e2di_size = h2fs32(fs2h32(dp->e2di_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(blk, cnt)
daddr_t blk;
int cnt;
{
int c;
if ((unsigned)(blk + cnt) > maxfsblock)
return (1);
c = dtog(&sblock, blk);
if (blk < sblock.e2fs.e2fs_bpg * c + cgoverhead +
sblock.e2fs.e2fs_first_dblock) {
if ((blk + cnt) > sblock.e2fs.e2fs_bpg * c + cgoverhead +
sblock.e2fs.e2fs_first_dblock) {
if (debug) {
printf("blk %d < cgdmin %d;",
blk, sblock.e2fs.e2fs_bpg * c + cgoverhead +
sblock.e2fs.e2fs_first_dblock);
printf(" blk + cnt %d > cgsbase %d\n",
blk + cnt, sblock.e2fs.e2fs_bpg * c + cgoverhead +
sblock.e2fs.e2fs_first_dblock);
}
return (1);
}
} else {
if ((blk + cnt) > sblock.e2fs.e2fs_bpg * (c + 1) + cgoverhead +
sblock.e2fs.e2fs_first_dblock) {
if (debug) {
printf("blk %d >= cgdmin %d;",
blk, sblock.e2fs.e2fs_bpg * c + cgoverhead +
sblock.e2fs.e2fs_first_dblock);
printf(" blk + cnt %d > cgdmax %d\n",
blk+cnt, sblock.e2fs.e2fs_bpg * (c + 1) + cgoverhead +
sblock.e2fs.e2fs_first_dblock);
}
return (1);
}
}
return (0);
}
/*
* General purpose interface for reading inodes.
*/
struct ext2fs_dinode *
ginode(inumber)
ino_t inumber;
{
daddr_t iblk;
if ((inumber < EXT2_FIRSTINO && inumber != EXT2_ROOTINO)
|| inumber > maxino)
errexit("bad inode number %d to ginode\n", inumber);
if (startinum == 0 ||
inumber < startinum || inumber >= startinum + sblock.e2fs_ipb) {
iblk = fsck_ino_to_fsba(&sblock, inumber);
if (pbp != 0)
pbp->b_flags &= ~B_INUSE;
pbp = getdatablk(iblk, sblock.e2fs_bsize);
startinum = ((inumber -1) / sblock.e2fs_ipb) * sblock.e2fs_ipb + 1;
}
return (&pbp->b_un.b_dinode[(inumber-1) % sblock.e2fs_ipb]);
}
/*
* Special purpose version of ginode used to optimize first pass
* over all the inodes in numerical order.
*/
ino_t nextino, lastinum;
long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
struct ext2fs_dinode *inodebuf;
struct ext2fs_dinode *
getnextinode(inumber)
ino_t inumber;
{
long size;
daddr_t dblk;
static struct ext2fs_dinode *dp;
if (inumber != nextino++ || inumber > maxino)
errexit("bad inode number %d to nextinode\n", inumber);
if (inumber >= lastinum) {
readcnt++;
dblk = fsbtodb(&sblock, fsck_ino_to_fsba(&sblock, lastinum));
if (readcnt % readpercg == 0) {
size = partialsize;
lastinum += partialcnt;
} else {
size = inobufsize;
lastinum += fullcnt;
}
(void)bread(fsreadfd, (char *)inodebuf, dblk, size);
dp = inodebuf;
}
return (dp++);
}
void
resetinodebuf()
{
startinum = 0;
nextino = 1;
lastinum = 1;
readcnt = 0;
inobufsize = blkroundup(&sblock, INOBUFSIZE);
fullcnt = inobufsize / sizeof(struct ext2fs_dinode);
readpercg = sblock.e2fs.e2fs_ipg / fullcnt;
partialcnt = sblock.e2fs.e2fs_ipg % fullcnt;
partialsize = partialcnt * sizeof(struct ext2fs_dinode);
if (partialcnt != 0) {
readpercg++;
} else {
partialcnt = fullcnt;
partialsize = inobufsize;
}
if (inodebuf == NULL &&
(inodebuf = (struct ext2fs_dinode *)malloc((unsigned)inobufsize)) ==
NULL)
errexit("Cannot allocate space for inode buffer\n");
while (nextino < EXT2_ROOTINO)
(void)getnextinode(nextino);
}
void
freeinodebuf()
{
if (inodebuf != NULL)
free((char *)inodebuf);
inodebuf = NULL;
}
/*
* 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(dp, inumber)
struct ext2fs_dinode *dp;
ino_t inumber;
{
struct inoinfo *inp;
struct inoinfo **inpp;
unsigned int blks;
blks = howmany(fs2h32(dp->e2di_size), sblock.e2fs_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 == EXT2_ROOTINO)
inp->i_parent = EXT2_ROOTINO;
else
inp->i_parent = (ino_t)0;
inp->i_dotdot = (ino_t)0;
inp->i_number = inumber;
inp->i_isize = fs2h32(dp->e2di_size);
inp->i_numblks = blks * sizeof(daddr_t);
memcpy(&inp->i_blks[0], &dp->e2di_blocks[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\n");
}
inpsort[inplast++] = inp;
}
/*
* Look up an inode cache structure.
*/
struct inoinfo *
getinoinfo(inumber)
ino_t inumber;
{
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()
{
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(idesc, type, flag)
struct inodesc *idesc;
char *type;
int flag;
{
struct ext2fs_dinode *dp;
dp = ginode(idesc->id_number);
if (flag == 1) {
pwarn("%s %s", type,
(dp->e2di_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();
}
}
int
findname(idesc)
struct inodesc *idesc;
{
struct ext2fs_direct *dirp = idesc->id_dirp;
u_int16_t namlen = fs2h16(dirp->e2d_namlen);
if (fs2h32(dirp->e2d_ino) != idesc->id_parent)
return (KEEPON);
memcpy(idesc->id_name, dirp->e2d_name, (size_t)namlen);
idesc->id_name[namlen] = '\0';
return (STOP|FOUND);
}
int
findino(idesc)
struct inodesc *idesc;
{
struct ext2fs_direct *dirp = idesc->id_dirp;
u_int32_t ino = fs2h32(dirp->e2d_ino);
if (ino == 0)
return (KEEPON);
if (strcmp(dirp->e2d_name, idesc->id_name) == 0 &&
(ino == EXT2_ROOTINO || ino >= EXT2_FIRSTINO)
&& ino <= maxino) {
idesc->id_parent = ino;
return (STOP|FOUND);
}
return (KEEPON);
}
void
pinode(ino)
ino_t ino;
{
struct ext2fs_dinode *dp;
char *p;
struct passwd *pw;
time_t t;
printf(" I=%u ", ino);
if ((ino < EXT2_FIRSTINO && ino != EXT2_ROOTINO) || ino > maxino)
return;
dp = ginode(ino);
printf(" OWNER=");
#ifndef SMALL
if ((pw = getpwuid((int)dp->e2di_uid)) != 0)
printf("%s ", pw->pw_name);
else
#endif
printf("%u ", (unsigned)fs2h16(dp->e2di_uid));
printf("MODE=%o\n", fs2h16(dp->e2di_mode));
if (preen)
printf("%s: ", cdevname());
printf("SIZE=%u ", fs2h32(dp->e2di_size));
t = fs2h32(dp->e2di_mtime);
p = ctime(&t);
printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
}
void
blkerror(ino, type, blk)
ino_t ino;
char *type;
daddr_t blk;
{
pfatal("%d %s I=%u", blk, type, 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\n", statemap[ino]);
/* NOTREACHED */
}
}
/*
* allocate an unused inode
*/
ino_t
allocino(request, type)
ino_t request;
int type;
{
ino_t ino;
struct ext2fs_dinode *dp;
time_t t;
if (request == 0)
request = EXT2_ROOTINO;
else if (statemap[request] != USTATE)
return (0);
for (ino = request; ino < maxino; ino++) {
if ((ino > EXT2_ROOTINO) && (ino < EXT2_FIRSTINO))
continue;
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->e2di_blocks[0] = h2fs32(allocblk());
if (dp->e2di_blocks[0] == 0) {
statemap[ino] = USTATE;
return (0);
}
dp->e2di_mode = h2fs16(type);
(void)time(&t);
dp->e2di_atime = h2fs32(t);
dp->e2di_mtime = dp->e2di_ctime = dp->e2di_atime;
dp->e2di_dtime = 0;
dp->e2di_size = h2fs32(sblock.e2fs_bsize);
dp->e2di_nblock = h2fs32(btodb(sblock.e2fs_bsize));
n_files++;
inodirty();
return (ino);
}
/*
* deallocate an inode
*/
void
freeino(ino)
ino_t ino;
{
struct inodesc idesc;
struct ext2fs_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--;
}
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