FreeBSD-5.3/sbin/fsck_ffs/pass1.c
/*
* 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.
* 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.
*/
#if 0
#ifndef lint
static const char sccsid[] = "@(#)pass1.c 8.6 (Berkeley) 4/28/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sbin/fsck_ffs/pass1.c,v 1.41 2004/04/09 19:58:28 markm Exp $");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <limits.h>
#include <stdint.h>
#include <string.h>
#include "fsck.h"
static ufs2_daddr_t badblk;
static ufs2_daddr_t dupblk;
static ino_t lastino; /* last inode in use */
static void checkinode(ino_t inumber, struct inodesc *);
void
pass1(void)
{
struct inostat *info;
struct inodesc idesc;
ino_t inumber, inosused;
ufs2_daddr_t i, cgd;
u_int8_t *cp;
int c;
/*
* Set file system reserved blocks in used block map.
*/
for (c = 0; c < sblock.fs_ncg; c++) {
cgd = cgdmin(&sblock, c);
if (c == 0) {
i = cgbase(&sblock, c);
} else
i = cgsblock(&sblock, c);
for (; i < cgd; i++)
setbmap(i);
}
i = sblock.fs_csaddr;
cgd = i + howmany(sblock.fs_cssize, sblock.fs_fsize);
for (; i < cgd; i++)
setbmap(i);
/*
* Find all allocated blocks.
*/
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_func = pass1check;
n_files = n_blks = 0;
for (c = 0; c < sblock.fs_ncg; c++) {
inumber = c * sblock.fs_ipg;
setinodebuf(inumber);
getblk(&cgblk, cgtod(&sblock, c), sblock.fs_cgsize);
if (sblock.fs_magic == FS_UFS2_MAGIC)
inosused = cgrp.cg_initediblk;
else
inosused = sblock.fs_ipg;
if (got_siginfo) {
printf("%s: phase 1: cyl group %d of %d (%d%%)\n",
cdevname, c, sblock.fs_ncg,
c * 100 / sblock.fs_ncg);
got_siginfo = 0;
}
if (got_sigalarm) {
setproctitle("%s p1 %d%%", cdevname,
c * 100 / sblock.fs_ncg);
got_sigalarm = 0;
}
/*
* If we are using soft updates, then we can trust the
* cylinder group inode allocation maps to tell us which
* inodes are allocated. We will scan the used inode map
* to find the inodes that are really in use, and then
* read only those inodes in from disk.
*/
if (preen && usedsoftdep) {
if (!cg_chkmagic(&cgrp))
pfatal("CG %d: BAD MAGIC NUMBER\n", c);
cp = &cg_inosused(&cgrp)[(inosused - 1) / CHAR_BIT];
for ( ; inosused > 0; inosused -= CHAR_BIT, cp--) {
if (*cp == 0)
continue;
for (i = 1 << (CHAR_BIT - 1); i > 0; i >>= 1) {
if (*cp & i)
break;
inosused--;
}
break;
}
if (inosused < 0)
inosused = 0;
}
/*
* Allocate inoinfo structures for the allocated inodes.
*/
inostathead[c].il_numalloced = inosused;
if (inosused == 0) {
inostathead[c].il_stat = 0;
continue;
}
info = calloc((unsigned)inosused, sizeof(struct inostat));
if (info == NULL)
errx(EEXIT, "cannot alloc %u bytes for inoinfo",
(unsigned)(sizeof(struct inostat) * inosused));
inostathead[c].il_stat = info;
/*
* Scan the allocated inodes.
*/
for (i = 0; i < inosused; i++, inumber++) {
if (inumber < ROOTINO) {
(void)getnextinode(inumber);
continue;
}
checkinode(inumber, &idesc);
}
lastino += 1;
if (inosused < sblock.fs_ipg || inumber == lastino)
continue;
/*
* If we were not able to determine in advance which inodes
* were in use, then reduce the size of the inoinfo structure
* to the size necessary to describe the inodes that we
* really found.
*/
if (lastino < (c * sblock.fs_ipg))
inosused = 0;
else
inosused = lastino - (c * sblock.fs_ipg);
inostathead[c].il_numalloced = inosused;
if (inosused == 0) {
free(inostathead[c].il_stat);
inostathead[c].il_stat = 0;
continue;
}
info = calloc((unsigned)inosused, sizeof(struct inostat));
if (info == NULL)
errx(EEXIT, "cannot alloc %u bytes for inoinfo",
(unsigned)(sizeof(struct inostat) * inosused));
memmove(info, inostathead[c].il_stat, inosused * sizeof(*info));
free(inostathead[c].il_stat);
inostathead[c].il_stat = info;
}
freeinodebuf();
}
static void
checkinode(ino_t inumber, struct inodesc *idesc)
{
union dinode *dp;
struct zlncnt *zlnp;
off_t kernmaxfilesize;
ufs2_daddr_t ndb;
mode_t mode;
int j, ret, offset;
dp = getnextinode(inumber);
mode = DIP(dp, di_mode) & IFMT;
if (mode == 0) {
if ((sblock.fs_magic == FS_UFS1_MAGIC &&
(memcmp(dp->dp1.di_db, ufs1_zino.di_db,
NDADDR * sizeof(ufs1_daddr_t)) ||
memcmp(dp->dp1.di_ib, ufs1_zino.di_ib,
NIADDR * sizeof(ufs1_daddr_t)) ||
dp->dp1.di_mode || dp->dp1.di_size)) ||
(sblock.fs_magic == FS_UFS2_MAGIC &&
(memcmp(dp->dp2.di_db, ufs2_zino.di_db,
NDADDR * sizeof(ufs2_daddr_t)) ||
memcmp(dp->dp2.di_ib, ufs2_zino.di_ib,
NIADDR * sizeof(ufs2_daddr_t)) ||
dp->dp2.di_mode || dp->dp2.di_size))) {
pfatal("PARTIALLY ALLOCATED INODE I=%lu",
(u_long)inumber);
if (reply("CLEAR") == 1) {
dp = ginode(inumber);
clearinode(dp);
inodirty();
}
}
inoinfo(inumber)->ino_state = USTATE;
return;
}
lastino = inumber;
/* This should match the file size limit in ffs_mountfs(). */
if (sblock.fs_magic == FS_UFS1_MAGIC)
kernmaxfilesize = (off_t)0x40000000 * sblock.fs_bsize - 1;
else
kernmaxfilesize = sblock.fs_maxfilesize;
if (DIP(dp, di_size) > kernmaxfilesize ||
DIP(dp, di_size) > sblock.fs_maxfilesize ||
(mode == IFDIR && DIP(dp, di_size) > MAXDIRSIZE)) {
if (debug)
printf("bad size %ju:", (uintmax_t)DIP(dp, di_size));
goto unknown;
}
if (!preen && mode == IFMT && reply("HOLD BAD BLOCK") == 1) {
dp = ginode(inumber);
DIP(dp, di_size) = sblock.fs_fsize;
DIP(dp, di_mode) = IFREG|0600;
inodirty();
}
if ((mode == IFBLK || mode == IFCHR || mode == IFIFO ||
mode == IFSOCK) && DIP(dp, di_size) != 0) {
if (debug)
printf("bad special-file size %ju:",
(uintmax_t)DIP(dp, di_size));
goto unknown;
}
if ((mode == IFBLK || mode == IFCHR) &&
(dev_t)DIP(dp, di_rdev) == NODEV) {
if (debug)
printf("bad special-file rdev NODEV:");
goto unknown;
}
ndb = howmany(DIP(dp, di_size), sblock.fs_bsize);
if (ndb < 0) {
if (debug)
printf("bad size %ju ndb %ju:",
(uintmax_t)DIP(dp, di_size), (uintmax_t)ndb);
goto unknown;
}
if (mode == IFBLK || mode == IFCHR)
ndb++;
if (mode == IFLNK) {
/*
* Fake ndb value so direct/indirect block checks below
* will detect any garbage after symlink string.
*/
if (DIP(dp, di_size) < (off_t)sblock.fs_maxsymlinklen) {
if (sblock.fs_magic == FS_UFS1_MAGIC)
ndb = howmany(DIP(dp, di_size),
sizeof(ufs1_daddr_t));
else
ndb = howmany(DIP(dp, di_size),
sizeof(ufs2_daddr_t));
if (ndb > NDADDR) {
j = ndb - NDADDR;
for (ndb = 1; j > 1; j--)
ndb *= NINDIR(&sblock);
ndb += NDADDR;
}
}
}
for (j = ndb; ndb < NDADDR && j < NDADDR; j++)
if (DIP(dp, di_db[j]) != 0) {
if (debug)
printf("bad direct addr[%d]: %ju\n", j,
(uintmax_t)DIP(dp, di_db[j]));
goto unknown;
}
for (j = 0, ndb -= NDADDR; ndb > 0; j++)
ndb /= NINDIR(&sblock);
for (; j < NIADDR; j++)
if (DIP(dp, di_ib[j]) != 0) {
if (debug)
printf("bad indirect addr: %ju\n",
(uintmax_t)DIP(dp, di_ib[j]));
goto unknown;
}
if (ftypeok(dp) == 0)
goto unknown;
n_files++;
inoinfo(inumber)->ino_linkcnt = DIP(dp, di_nlink);
if (DIP(dp, di_nlink) <= 0) {
zlnp = (struct zlncnt *)malloc(sizeof *zlnp);
if (zlnp == NULL) {
pfatal("LINK COUNT TABLE OVERFLOW");
if (reply("CONTINUE") == 0) {
ckfini(0);
exit(EEXIT);
}
} else {
zlnp->zlncnt = inumber;
zlnp->next = zlnhead;
zlnhead = zlnp;
}
}
if (mode == IFDIR) {
if (DIP(dp, di_size) == 0)
inoinfo(inumber)->ino_state = DCLEAR;
else
inoinfo(inumber)->ino_state = DSTATE;
cacheino(dp, inumber);
countdirs++;
} else
inoinfo(inumber)->ino_state = FSTATE;
inoinfo(inumber)->ino_type = IFTODT(mode);
badblk = dupblk = 0;
idesc->id_number = inumber;
if (DIP(dp, di_flags) & SF_SNAPSHOT)
idesc->id_type = SNAP;
else
idesc->id_type = ADDR;
(void)ckinode(dp, idesc);
if (sblock.fs_magic == FS_UFS2_MAGIC && dp->dp2.di_extsize > 0) {
idesc->id_type = ADDR;
ndb = howmany(dp->dp2.di_extsize, sblock.fs_bsize);
for (j = 0; j < NXADDR; j++) {
if (--ndb == 0 &&
(offset = blkoff(&sblock, dp->dp2.di_extsize)) != 0)
idesc->id_numfrags = numfrags(&sblock,
fragroundup(&sblock, offset));
else
idesc->id_numfrags = sblock.fs_frag;
if (dp->dp2.di_extb[j] == 0)
continue;
idesc->id_blkno = dp->dp2.di_extb[j];
ret = (*idesc->id_func)(idesc);
if (ret & STOP)
break;
}
}
if (sblock.fs_magic == FS_UFS2_MAGIC)
eascan(idesc, &dp->dp2);
idesc->id_entryno *= btodb(sblock.fs_fsize);
if (DIP(dp, di_blocks) != idesc->id_entryno) {
pwarn("INCORRECT BLOCK COUNT I=%lu (%ju should be %ju)",
(u_long)inumber, (uintmax_t)DIP(dp, di_blocks),
(uintmax_t)idesc->id_entryno);
if (preen)
printf(" (CORRECTED)\n");
else if (reply("CORRECT") == 0)
return;
if (bkgrdflag == 0) {
dp = ginode(inumber);
DIP(dp, di_blocks) = idesc->id_entryno;
inodirty();
} else {
cmd.value = idesc->id_number;
cmd.size = idesc->id_entryno - DIP(dp, di_blocks);
if (debug)
printf("adjblkcnt ino %ju amount %lld\n",
(uintmax_t)cmd.value, (long long)cmd.size);
if (sysctl(adjblkcnt, MIBSIZE, 0, 0,
&cmd, sizeof cmd) == -1)
rwerror("ADJUST INODE BLOCK COUNT", cmd.value);
}
}
return;
unknown:
pfatal("UNKNOWN FILE TYPE I=%lu", (u_long)inumber);
inoinfo(inumber)->ino_state = FCLEAR;
if (reply("CLEAR") == 1) {
inoinfo(inumber)->ino_state = USTATE;
dp = ginode(inumber);
clearinode(dp);
inodirty();
}
}
int
pass1check(struct inodesc *idesc)
{
int res = KEEPON;
int anyout, nfrags;
ufs2_daddr_t blkno = idesc->id_blkno;
struct dups *dlp;
struct dups *new;
if (idesc->id_type == SNAP) {
if (blkno == BLK_NOCOPY)
return (KEEPON);
if (idesc->id_number == cursnapshot) {
if (blkno == blkstofrags(&sblock, idesc->id_lbn))
return (KEEPON);
if (blkno == BLK_SNAP) {
blkno = blkstofrags(&sblock, idesc->id_lbn);
idesc->id_entryno -= idesc->id_numfrags;
}
} else {
if (blkno == BLK_SNAP)
return (KEEPON);
}
}
if ((anyout = chkrange(blkno, idesc->id_numfrags)) != 0) {
blkerror(idesc->id_number, "BAD", blkno);
if (badblk++ >= MAXBAD) {
pwarn("EXCESSIVE BAD BLKS I=%lu",
(u_long)idesc->id_number);
if (preen)
printf(" (SKIPPING)\n");
else if (reply("CONTINUE") == 0) {
ckfini(0);
exit(EEXIT);
}
return (STOP);
}
}
for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
if (anyout && chkrange(blkno, 1)) {
res = SKIP;
} else if (!testbmap(blkno)) {
n_blks++;
setbmap(blkno);
} else {
blkerror(idesc->id_number, "DUP", blkno);
if (dupblk++ >= MAXDUP) {
pwarn("EXCESSIVE DUP BLKS I=%lu",
(u_long)idesc->id_number);
if (preen)
printf(" (SKIPPING)\n");
else if (reply("CONTINUE") == 0) {
ckfini(0);
exit(EEXIT);
}
return (STOP);
}
new = (struct dups *)malloc(sizeof(struct dups));
if (new == NULL) {
pfatal("DUP TABLE OVERFLOW.");
if (reply("CONTINUE") == 0) {
ckfini(0);
exit(EEXIT);
}
return (STOP);
}
new->dup = blkno;
if (muldup == 0) {
duplist = muldup = new;
new->next = 0;
} else {
new->next = muldup->next;
muldup->next = new;
}
for (dlp = duplist; dlp != muldup; dlp = dlp->next)
if (dlp->dup == blkno)
break;
if (dlp == muldup && dlp->dup != blkno)
muldup = new;
}
/*
* count the number of blocks found in id_entryno
*/
idesc->id_entryno++;
}
return (res);
}