NetBSD/sbin/fsck_lfs/inode.c

650 lines
16 KiB
C

/* $NetBSD: inode.c,v 1.40 2008/10/09 16:56:23 christos Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Konrad E. Schroder <perseant@hhhh.org>.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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. 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/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/buf.h>
#include <sys/mount.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#define vnode uvnode
#include <ufs/lfs/lfs.h>
#undef vnode
#include <err.h>
#ifndef SMALL
#include <pwd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <util.h>
#include "bufcache.h"
#include "vnode.h"
#include "lfs_user.h"
#include "fsck.h"
#include "fsutil.h"
#include "extern.h"
extern SEGUSE *seg_table;
extern ufs_daddr_t *din_table;
static int iblock(struct inodesc *, long, u_int64_t);
int blksreqd(struct lfs *, int);
int lfs_maxino(void);
/*
* Get a dinode of a given inum.
* XXX combine this function with vget.
*/
struct ufs1_dinode *
ginode(ino_t ino)
{
struct uvnode *vp;
struct ubuf *bp;
IFILE *ifp;
vp = vget(fs, ino);
if (vp == NULL)
return NULL;
if (din_table[ino] == 0x0) {
LFS_IENTRY(ifp, fs, ino, bp);
din_table[ino] = ifp->if_daddr;
seg_table[dtosn(fs, ifp->if_daddr)].su_nbytes += DINODE1_SIZE;
brelse(bp, 0);
}
return (VTOI(vp)->i_din.ffs1_din);
}
/*
* Check validity of held blocks in an inode, recursing through all blocks.
*/
int
ckinode(struct ufs1_dinode *dp, struct inodesc *idesc)
{
ufs_daddr_t *ap, lbn;
long ret, n, ndb, offset;
struct ufs1_dinode dino;
u_int64_t remsize, sizepb;
mode_t mode;
char pathbuf[MAXPATHLEN + 1];
struct uvnode *vp, *thisvp;
if (idesc->id_fix != IGNORE)
idesc->id_fix = DONTKNOW;
idesc->id_entryno = 0;
idesc->id_filesize = dp->di_size;
mode = dp->di_mode & IFMT;
if (mode == IFBLK || mode == IFCHR ||
(mode == IFLNK && (dp->di_size < fs->lfs_maxsymlinklen ||
(fs->lfs_maxsymlinklen == 0 &&
dp->di_blocks == 0))))
return (KEEPON);
dino = *dp;
ndb = howmany(dino.di_size, fs->lfs_bsize);
thisvp = vget(fs, idesc->id_number);
for (lbn = 0; lbn < NDADDR; lbn++) {
ap = dino.di_db + lbn;
if (thisvp)
idesc->id_numfrags =
numfrags(fs, VTOI(thisvp)->i_lfs_fragsize[lbn]);
else {
if (--ndb == 0 && (offset = blkoff(fs, dino.di_size)) != 0) {
idesc->id_numfrags =
numfrags(fs, fragroundup(fs, offset));
} else
idesc->id_numfrags = fs->lfs_frag;
}
if (*ap == 0) {
if (idesc->id_type == DATA && ndb >= 0) {
/* An empty block in a directory XXX */
getpathname(pathbuf, sizeof(pathbuf),
idesc->id_number, idesc->id_number);
pfatal("DIRECTORY %s INO %lld: CONTAINS EMPTY BLOCKS [1]",
pathbuf, (long long)idesc->id_number);
if (reply("ADJUST LENGTH") == 1) {
vp = vget(fs, idesc->id_number);
dp = VTOD(vp);
dp->di_size = (ap - &dino.di_db[0]) *
fs->lfs_bsize;
printf(
"YOU MUST RERUN FSCK AFTERWARDS\n");
rerun = 1;
inodirty(VTOI(vp));
} else
break;
}
continue;
}
idesc->id_blkno = *ap;
idesc->id_lblkno = ap - &dino.di_db[0];
if (idesc->id_type == ADDR) {
ret = (*idesc->id_func) (idesc);
} else
ret = dirscan(idesc);
if (ret & STOP)
return (ret);
}
idesc->id_numfrags = fs->lfs_frag;
remsize = dino.di_size - fs->lfs_bsize * NDADDR;
sizepb = fs->lfs_bsize;
for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
if (*ap) {
idesc->id_blkno = *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, sizeof(pathbuf),
idesc->id_number, idesc->id_number);
pfatal("DIRECTORY %s INO %lld: CONTAINS EMPTY BLOCKS [2]",
pathbuf, (long long)idesc->id_number);
if (reply("ADJUST LENGTH") == 1) {
vp = vget(fs, idesc->id_number);
dp = VTOD(vp);
dp->di_size -= remsize;
remsize = 0;
printf(
"YOU MUST RERUN FSCK AFTERWARDS\n");
rerun = 1;
inodirty(VTOI(vp));
break;
} else
break;
}
}
sizepb *= NINDIR(fs);
remsize -= sizepb;
}
return (KEEPON);
}
static int
iblock(struct inodesc *idesc, long ilevel, u_int64_t isize)
{
ufs_daddr_t *ap, *aplim;
struct ubuf *bp;
int i, n, (*func) (struct inodesc *), nif;
u_int64_t sizepb;
char pathbuf[MAXPATHLEN + 1], buf[BUFSIZ];
struct uvnode *devvp, *vp;
int diddirty = 0;
if (idesc->id_type == ADDR) {
func = idesc->id_func;
n = (*func) (idesc);
if ((n & KEEPON) == 0)
return (n);
} else
func = dirscan;
if (chkrange(idesc->id_blkno, fragstofsb(fs, idesc->id_numfrags)))
return (SKIP);
devvp = fs->lfs_devvp;
bread(devvp, fsbtodb(fs, idesc->id_blkno), fs->lfs_bsize,
NOCRED, 0, &bp);
ilevel--;
for (sizepb = fs->lfs_bsize, i = 0; i < ilevel; i++)
sizepb *= NINDIR(fs);
if (isize > sizepb * NINDIR(fs))
nif = NINDIR(fs);
else
nif = howmany(isize, sizepb);
if (idesc->id_func == pass1check && nif < NINDIR(fs)) {
aplim = ((ufs_daddr_t *) bp->b_data) + NINDIR(fs);
for (ap = ((ufs_daddr_t *) bp->b_data) + nif; ap < aplim; ap++) {
if (*ap == 0)
continue;
(void) sprintf(buf, "PARTIALLY TRUNCATED INODE I=%llu",
(unsigned long long)idesc->id_number);
if (dofix(idesc, buf)) {
*ap = 0;
++diddirty;
}
}
}
aplim = ((ufs_daddr_t *) bp->b_data) + nif;
for (ap = ((ufs_daddr_t *) bp->b_data); ap < aplim; ap++) {
if (*ap) {
idesc->id_blkno = *ap;
if (ilevel == 0) {
/*
* dirscan needs lblkno.
*/
idesc->id_lblkno++;
n = (*func) (idesc);
} else {
n = iblock(idesc, ilevel, isize);
}
if (n & STOP) {
if (diddirty)
VOP_BWRITE(bp);
else
brelse(bp, 0);
return (n);
}
} else {
if (idesc->id_type == DATA && isize > 0) {
/* An empty block in a directory XXX */
getpathname(pathbuf, sizeof(pathbuf),
idesc->id_number, idesc->id_number);
pfatal("DIRECTORY %s INO %lld: CONTAINS EMPTY BLOCKS [3]",
pathbuf, (long long)idesc->id_number);
if (reply("ADJUST LENGTH") == 1) {
vp = vget(fs, idesc->id_number);
VTOI(vp)->i_ffs1_size -= isize;
isize = 0;
printf(
"YOU MUST RERUN FSCK AFTERWARDS\n");
rerun = 1;
inodirty(VTOI(vp));
if (diddirty)
VOP_BWRITE(bp);
else
brelse(bp, 0);
return (STOP);
}
}
}
isize -= sizepb;
}
if (diddirty)
VOP_BWRITE(bp);
else
brelse(bp, 0);
return (KEEPON);
}
/*
* Check that a block in a legal block number.
* Return 0 if in range, 1 if out of range.
*/
int
chkrange(daddr_t blk, int cnt)
{
if (blk < sntod(fs, 0)) {
return (1);
}
if (blk > maxfsblock) {
return (1);
}
if (blk + cnt < sntod(fs, 0)) {
return (1);
}
if (blk + cnt > maxfsblock) {
return (1);
}
return (0);
}
/*
* 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(struct ufs1_dinode * dp, ino_t inumber)
{
struct inoinfo *inp;
struct inoinfo **inpp, **ninpsort;
unsigned int blks;
blks = howmany(dp->di_size, fs->lfs_bsize);
if (blks > NDADDR)
blks = NDADDR + NIADDR;
inp = emalloc(sizeof(*inp) + (blks - 1) * sizeof(ufs_daddr_t));
inpp = &inphead[inumber % numdirs];
inp->i_nexthash = *inpp;
*inpp = inp;
inp->i_child = inp->i_sibling = inp->i_parentp = 0;
if (inumber == ROOTINO)
inp->i_parent = ROOTINO;
else
inp->i_parent = (ino_t) 0;
inp->i_dotdot = (ino_t) 0;
inp->i_number = inumber;
inp->i_isize = dp->di_size;
inp->i_numblks = blks * sizeof(ufs_daddr_t);
memcpy(&inp->i_blks[0], &dp->di_db[0], (size_t) inp->i_numblks);
if (inplast == listmax) {
ninpsort = erealloc(inpsort,
(listmax + 100) * sizeof(struct inoinfo *));
inpsort = ninpsort;
listmax += 100;
}
inpsort[inplast++] = inp;
}
/*
* Look up an inode cache structure.
*/
struct inoinfo *
getinoinfo(ino_t inumber)
{
struct inoinfo *inp;
for (inp = inphead[inumber % numdirs]; inp; inp = inp->i_nexthash) {
if (inp->i_number != inumber)
continue;
return (inp);
}
err(EEXIT, "cannot find inode %llu\n", (unsigned long long)inumber);
return ((struct inoinfo *) 0);
}
/*
* Clean up all the inode cache structure.
*/
void
inocleanup(void)
{
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(struct inode *ip)
{
ip->i_flag |= IN_MODIFIED;
}
void
clri(struct inodesc * idesc, const char *type, int flag)
{
struct uvnode *vp;
vp = vget(fs, idesc->id_number);
if (flag & 0x1) {
pwarn("%s %s", type,
(VTOI(vp)->i_ffs1_mode & IFMT) == IFDIR ? "DIR" : "FILE");
pinode(idesc->id_number);
}
if ((flag & 0x2) || preen || reply("CLEAR") == 1) {
if (preen && flag != 2)
printf(" (CLEARED)\n");
n_files--;
(void) ckinode(VTOD(vp), idesc);
clearinode(idesc->id_number);
statemap[idesc->id_number] = USTATE;
vnode_destroy(vp);
return;
}
return;
}
void
clearinode(ino_t inumber)
{
struct ubuf *bp;
IFILE *ifp;
daddr_t daddr;
/* Send cleared inode to the free list */
LFS_IENTRY(ifp, fs, inumber, bp);
daddr = ifp->if_daddr;
if (daddr == LFS_UNUSED_DADDR) {
brelse(bp, 0);
return;
}
ifp->if_daddr = LFS_UNUSED_DADDR;
ifp->if_nextfree = fs->lfs_freehd;
fs->lfs_freehd = inumber;
sbdirty();
VOP_BWRITE(bp);
/*
* update segment usage.
*/
if (daddr != LFS_UNUSED_DADDR) {
SEGUSE *sup;
u_int32_t oldsn = dtosn(fs, daddr);
seg_table[oldsn].su_nbytes -= DINODE1_SIZE;
LFS_SEGENTRY(sup, fs, oldsn, bp);
sup->su_nbytes -= DINODE1_SIZE;
LFS_WRITESEGENTRY(sup, fs, oldsn, bp); /* Ifile */
}
}
int
findname(struct inodesc * idesc)
{
struct direct *dirp = idesc->id_dirp;
size_t len;
char *buf;
if (dirp->d_ino != idesc->id_parent)
return (KEEPON);
if ((len = dirp->d_namlen + 1) > MAXPATHLEN) {
/* Truncate it but don't overflow the buffer */
len = MAXPATHLEN;
}
/* this is namebuf with utils.h */
buf = __UNCONST(idesc->id_name);
(void)memcpy(buf, dirp->d_name, len);
return (STOP | FOUND);
}
int
findino(struct inodesc * idesc)
{
struct 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 < maxino) {
idesc->id_parent = dirp->d_ino;
return (STOP | FOUND);
}
return (KEEPON);
}
void
pinode(ino_t ino)
{
struct ufs1_dinode *dp;
char *p;
struct passwd *pw;
time_t t;
printf(" I=%llu ", (unsigned long long)ino);
if (ino < ROOTINO || ino >= maxino)
return;
dp = ginode(ino);
if (dp) {
printf(" OWNER=");
#ifndef SMALL
if (Uflag && (pw = getpwuid((int) dp->di_uid)) != 0)
printf("%s ", pw->pw_name);
else
#endif
printf("%u ", (unsigned) dp->di_uid);
printf("MODE=%o\n", dp->di_mode);
if (preen)
printf("%s: ", cdevname());
printf("SIZE=%llu ", (unsigned long long) dp->di_size);
t = dp->di_mtime;
p = ctime(&t);
printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
}
}
void
blkerror(ino_t ino, const char *type, daddr_t blk)
{
pfatal("%lld %s I=%llu", (long long) blk, type,
(unsigned long long)ino);
printf("\n");
if (exitonfail)
exit(1);
switch (statemap[ino]) {
case FSTATE:
statemap[ino] = FCLEAR;
return;
case DSTATE:
statemap[ino] = DCLEAR;
return;
case FCLEAR:
case DCLEAR:
return;
default:
err(EEXIT, "BAD STATE %d TO BLKERR\n", statemap[ino]);
/* NOTREACHED */
}
}
/*
* allocate an unused inode
*/
ino_t
allocino(ino_t request, int type)
{
ino_t ino;
struct ufs1_dinode *dp;
time_t t;
struct uvnode *vp;
struct ubuf *bp;
if (request == 0)
request = ROOTINO;
else if (statemap[request] != USTATE)
return (0);
for (ino = request; ino < maxino; ino++)
if (statemap[ino] == USTATE)
break;
if (ino == maxino)
extend_ifile(fs);
switch (type & IFMT) {
case IFDIR:
statemap[ino] = DSTATE;
break;
case IFREG:
case IFLNK:
statemap[ino] = FSTATE;
break;
default:
return (0);
}
vp = lfs_valloc(fs, ino);
if (vp == NULL)
return (0);
dp = (VTOI(vp)->i_din.ffs1_din);
bp = getblk(vp, 0, fs->lfs_fsize);
VOP_BWRITE(bp);
dp->di_mode = type;
(void) time(&t);
dp->di_atime = t;
dp->di_mtime = dp->di_ctime = dp->di_atime;
dp->di_size = fs->lfs_fsize;
dp->di_blocks = btofsb(fs, fs->lfs_fsize);
n_files++;
inodirty(VTOI(vp));
typemap[ino] = IFTODT(type);
return (ino);
}
/*
* deallocate an inode
*/
void
freeino(ino_t ino)
{
struct inodesc idesc;
struct uvnode *vp;
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_type = ADDR;
idesc.id_func = pass4check;
idesc.id_number = ino;
vp = vget(fs, ino);
(void) ckinode(VTOD(vp), &idesc);
clearinode(ino);
statemap[ino] = USTATE;
vnode_destroy(vp);
n_files--;
}