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NetBSD/sbin/fsck_ext2fs/pass2.c
bouyer 7052d78b8d Ext2 metadata are always stored on disk in little-endian byte order, 
so do byte-swapping on big-endian system. The byte-swap routines are in
fsck/bswap.c because they will also be used in fsck_ffs in future.
Tested on i386 and sparc.
1997-10-09 13:19:32 +00:00

412 lines
12 KiB
C
Raw Blame History

/* $NetBSD: pass2.c,v 1.4 1997/10/09 13:19:38 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[] = "@(#)pass2.c 8.6 (Berkeley) 10/27/94";
#else
__RCSID("$NetBSD: pass2.c,v 1.4 1997/10/09 13:19:38 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 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "fsck.h"
#include "fsutil.h"
#include "extern.h"
#define MINDIRSIZE (sizeof (struct ext2fs_dirtemplate))
static int pass2check __P((struct inodesc *));
static int blksort __P((const void *, const void *));
void
pass2()
{
struct ext2fs_dinode *dp;
struct inoinfo **inpp, *inp;
struct inoinfo **inpend;
struct inodesc curino;
struct ext2fs_dinode dino;
char pathbuf[MAXPATHLEN + 1];
switch (statemap[EXT2_ROOTINO]) {
case USTATE:
pfatal("ROOT INODE UNALLOCATED");
if (reply("ALLOCATE") == 0)
errexit("%s\n", "");
if (allocdir(EXT2_ROOTINO, EXT2_ROOTINO, 0755) != EXT2_ROOTINO)
errexit("CANNOT ALLOCATE ROOT INODE\n");
break;
case DCLEAR:
pfatal("DUPS/BAD IN ROOT INODE");
if (reply("REALLOCATE")) {
freeino(EXT2_ROOTINO);
if (allocdir(EXT2_ROOTINO, EXT2_ROOTINO, 0755) != EXT2_ROOTINO)
errexit("CANNOT ALLOCATE ROOT INODE\n");
break;
}
if (reply("CONTINUE") == 0)
errexit("%s\n", "");
break;
case FSTATE:
case FCLEAR:
pfatal("ROOT INODE NOT DIRECTORY");
if (reply("REALLOCATE")) {
freeino(EXT2_ROOTINO);
if (allocdir(EXT2_ROOTINO, EXT2_ROOTINO, 0755) != EXT2_ROOTINO)
errexit("CANNOT ALLOCATE ROOT INODE\n");
break;
}
if (reply("FIX") == 0)
errexit("%s\n", "");
dp = ginode(EXT2_ROOTINO);
dp->e2di_mode = h2fs16((fs2h16(dp->e2di_mode) & ~IFMT) | IFDIR);
inodirty();
break;
case DSTATE:
break;
default:
errexit("BAD STATE %d FOR ROOT INODE\n", statemap[EXT2_ROOTINO]);
}
/*
* Sort the directory list into disk block order.
*/
qsort((char *)inpsort, (size_t)inplast, sizeof *inpsort, blksort);
/*
* Check the integrity of each directory.
*/
memset(&curino, 0, sizeof(struct inodesc));
curino.id_type = DATA;
curino.id_func = pass2check;
inpend = &inpsort[inplast];
for (inpp = inpsort; inpp < inpend; inpp++) {
inp = *inpp;
if (inp->i_isize == 0)
continue;
if (inp->i_isize < MINDIRSIZE) {
direrror(inp->i_number, "DIRECTORY TOO SHORT");
inp->i_isize = roundup(MINDIRSIZE, sblock.e2fs_bsize);
if (reply("FIX") == 1) {
dp = ginode(inp->i_number);
dp->e2di_size = h2fs32(inp->i_isize);
inodirty();
}
} else if ((inp->i_isize & (sblock.e2fs_bsize - 1)) != 0) {
getpathname(pathbuf, inp->i_number, inp->i_number);
pwarn("DIRECTORY %s: LENGTH %lu NOT MULTIPLE OF %d",
pathbuf, (u_long)inp->i_isize, sblock.e2fs_bsize);
if (preen)
printf(" (ADJUSTED)\n");
inp->i_isize = roundup(inp->i_isize, sblock.e2fs_bsize);
if (preen || reply("ADJUST") == 1) {
dp = ginode(inp->i_number);
dp->e2di_size = h2fs32(inp->i_isize);
inodirty();
}
}
memset(&dino, 0, sizeof(struct ext2fs_dinode));
dino.e2di_mode = h2fs16(IFDIR);
dino.e2di_size = h2fs32(inp->i_isize);
memcpy(&dino.e2di_blocks[0], &inp->i_blks[0], (size_t)inp->i_numblks);
curino.id_number = inp->i_number;
curino.id_parent = inp->i_parent;
(void)ckinode(&dino, &curino);
}
/*
* Now that the parents of all directories have been found,
* make another pass to verify the value of `..'
*/
for (inpp = inpsort; inpp < inpend; inpp++) {
inp = *inpp;
if (inp->i_parent == 0 || inp->i_isize == 0)
continue;
if (inp->i_dotdot == inp->i_parent ||
inp->i_dotdot == (ino_t)-1)
continue;
if (inp->i_dotdot == 0) {
inp->i_dotdot = inp->i_parent;
fileerror(inp->i_parent, inp->i_number, "MISSING '..'");
if (reply("FIX") == 0)
continue;
(void)makeentry(inp->i_number, inp->i_parent, "..");
lncntp[inp->i_parent]--;
continue;
}
fileerror(inp->i_parent, inp->i_number,
"BAD INODE NUMBER FOR '..'");
if (reply("FIX") == 0)
continue;
lncntp[inp->i_dotdot]++;
lncntp[inp->i_parent]--;
inp->i_dotdot = inp->i_parent;
(void)changeino(inp->i_number, "..", inp->i_parent);
}
/*
* Mark all the directories that can be found from the root.
*/
propagate();
}
static int
pass2check(idesc)
struct inodesc *idesc;
{
struct ext2fs_direct *dirp = idesc->id_dirp;
struct inoinfo *inp;
int n, entrysize, ret = 0;
struct ext2fs_dinode *dp;
char *errmsg;
struct ext2fs_direct proto;
char namebuf[MAXPATHLEN + 1];
char pathbuf[MAXPATHLEN + 1];
/*
* check for "."
*/
if (idesc->id_entryno != 0)
goto chk1;
if (fs2h32(dirp->e2d_ino) != 0 && fs2h16(dirp->e2d_namlen) == 1 &&
dirp->e2d_name[0] == '.') {
if (fs2h32(dirp->e2d_ino) != idesc->id_number) {
direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'");
dirp->e2d_ino = h2fs32(idesc->id_number);
if (reply("FIX") == 1)
ret |= ALTERED;
}
goto chk1;
}
direrror(idesc->id_number, "MISSING '.'");
proto.e2d_ino = h2fs32(idesc->id_number);
proto.e2d_namlen = h2fs16(1);
(void)strcpy(proto.e2d_name, ".");
entrysize = EXT2FS_DIRSIZ(fs2h16(proto.e2d_namlen));
if (fs2h32(dirp->e2d_ino) != 0 && strcmp(dirp->e2d_name, "..") != 0) {
pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n",
dirp->e2d_name);
} else if (fs2h16(dirp->e2d_reclen) < entrysize) {
pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n");
} else if (fs2h16(dirp->e2d_reclen) < 2 * entrysize) {
proto.e2d_reclen = dirp->e2d_reclen;
memcpy(dirp, &proto, (size_t)entrysize);
if (reply("FIX") == 1)
ret |= ALTERED;
} else {
n = fs2h16(dirp->e2d_reclen) - entrysize;
proto.e2d_reclen = h2fs16(entrysize);
memcpy(dirp, &proto, (size_t)entrysize);
idesc->id_entryno++;
lncntp[fs2h32(dirp->e2d_ino)]--;
dirp = (struct ext2fs_direct *)((char *)(dirp) + entrysize);
memset(dirp, 0, (size_t)n);
dirp->e2d_reclen = h2fs16(n);
if (reply("FIX") == 1)
ret |= ALTERED;
}
chk1:
if (idesc->id_entryno > 1)
goto chk2;
inp = getinoinfo(idesc->id_number);
proto.e2d_ino = h2fs32(inp->i_parent);
proto.e2d_namlen = h2fs16(2);
(void)strcpy(proto.e2d_name, "..");
entrysize = EXT2FS_DIRSIZ(2);
if (idesc->id_entryno == 0) {
n = EXT2FS_DIRSIZ(fs2h16(dirp->e2d_namlen));
if (fs2h16(dirp->e2d_reclen) < n + entrysize)
goto chk2;
proto.e2d_reclen = h2fs16(fs2h16(dirp->e2d_reclen) - n);
dirp->e2d_reclen = h2fs16(n);
idesc->id_entryno++;
lncntp[fs2h32(dirp->e2d_ino)]--;
dirp = (struct ext2fs_direct *)((char *)(dirp) + n);
memset(dirp, 0, (size_t)fs2h16(proto.e2d_reclen));
dirp->e2d_reclen = proto.e2d_reclen;
}
if (fs2h32(dirp->e2d_ino) != 0 &&
fs2h16(dirp->e2d_namlen) == 2 &&
strncmp(dirp->e2d_name, "..", 2) == 0) {
inp->i_dotdot = fs2h32(dirp->e2d_ino);
goto chk2;
}
if (fs2h32(dirp->e2d_ino) != 0 &&
fs2h16(dirp->e2d_namlen) == 1 &&
strncmp(dirp->e2d_name, ".", 1) != 0) {
fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n",
dirp->e2d_name);
inp->i_dotdot = (ino_t)-1;
} else if (fs2h16(dirp->e2d_reclen) < entrysize) {
fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n");
inp->i_dotdot = (ino_t)-1;
} else if (inp->i_parent != 0) {
/*
* We know the parent, so fix now.
*/
inp->i_dotdot = inp->i_parent;
fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
proto.e2d_reclen = dirp->e2d_reclen;
memcpy(dirp, &proto, (size_t)entrysize);
if (reply("FIX") == 1)
ret |= ALTERED;
}
idesc->id_entryno++;
if (fs2h32(dirp->e2d_ino) != 0)
lncntp[fs2h32(dirp->e2d_ino)]--;
return (ret|KEEPON);
chk2:
if (fs2h32(dirp->e2d_ino) == 0)
return (ret|KEEPON);
if (fs2h16(dirp->e2d_namlen) <= 2 &&
dirp->e2d_name[0] == '.' &&
idesc->id_entryno >= 2) {
if (fs2h16(dirp->e2d_namlen) == 1) {
direrror(idesc->id_number, "EXTRA '.' ENTRY");
dirp->e2d_ino = 0;
if (reply("FIX") == 1)
ret |= ALTERED;
return (KEEPON | ret);
}
if (dirp->e2d_name[1] == '.') {
direrror(idesc->id_number, "EXTRA '..' ENTRY");
dirp->e2d_ino = 0;
if (reply("FIX") == 1)
ret |= ALTERED;
return (KEEPON | ret);
}
}
idesc->id_entryno++;
n = 0;
if (fs2h32(dirp->e2d_ino) > maxino ||
(fs2h32(dirp->e2d_ino) < EXT2_FIRSTINO &&
fs2h32(dirp->e2d_ino) != EXT2_ROOTINO)) {
fileerror(idesc->id_number, fs2h32(dirp->e2d_ino), "I OUT OF RANGE");
n = reply("REMOVE");
} else {
again:
switch (statemap[fs2h32(dirp->e2d_ino)]) {
case USTATE:
if (idesc->id_entryno <= 2)
break;
fileerror(idesc->id_number, fs2h32(dirp->e2d_ino), "UNALLOCATED");
n = reply("REMOVE");
break;
case DCLEAR:
case FCLEAR:
if (idesc->id_entryno <= 2)
break;
if (statemap[fs2h32(dirp->e2d_ino)] == FCLEAR)
errmsg = "DUP/BAD";
else if (!preen)
errmsg = "ZERO LENGTH DIRECTORY";
else {
n = 1;
break;
}
fileerror(idesc->id_number, fs2h32(dirp->e2d_ino), errmsg);
if ((n = reply("REMOVE")) == 1)
break;
dp = ginode(fs2h32(dirp->e2d_ino));
statemap[fs2h32(dirp->e2d_ino)] =
(fs2h16(dp->e2di_mode) & IFMT) == IFDIR ? DSTATE : FSTATE;
lncntp[fs2h32(dirp->e2d_ino)] = fs2h16(dp->e2di_nlink);
goto again;
case DSTATE:
case DFOUND:
inp = getinoinfo(fs2h32(dirp->e2d_ino));
if (inp->i_parent != 0 && idesc->id_entryno > 2) {
getpathname(pathbuf, idesc->id_number,
idesc->id_number);
getpathname(namebuf, fs2h32(dirp->e2d_ino),
fs2h32(dirp->e2d_ino));
pwarn("%s %s %s\n", pathbuf,
"IS AN EXTRANEOUS HARD LINK TO DIRECTORY",
namebuf);
if (preen)
printf(" (IGNORED)\n");
else if ((n = reply("REMOVE")) == 1)
break;
}
if (idesc->id_entryno > 2)
inp->i_parent = idesc->id_number;
/* fall through */
case FSTATE:
lncntp[fs2h32(dirp->e2d_ino)]--;
break;
default:
errexit("BAD STATE %d FOR INODE I=%d\n",
statemap[fs2h32(dirp->e2d_ino)], fs2h32(dirp->e2d_ino));
}
}
if (n == 0)
return (ret|KEEPON);
dirp->e2d_ino = 0;
return (ret|KEEPON|ALTERED);
}
/*
* Routine to sort disk blocks.
*/
static int
blksort(inpp1, inpp2)
const void *inpp1, *inpp2;
{
return ((* (struct inoinfo **) inpp1)->i_blks[0] -
(* (struct inoinfo **) inpp2)->i_blks[0]);
}
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