FreeBSD-5.3/sbin/fsck_ffs/fsutil.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[] = "@(#)utilities.c 8.6 (Berkeley) 5/19/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sbin/fsck_ffs/fsutil.c,v 1.24 2004/05/18 19:51:41 scottl Exp $");
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/disklabel.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <fstab.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "fsck.h"
static void slowio_start(void);
static void slowio_end(void);
long diskreads, totalreads; /* Disk cache statistics */
struct timeval slowio_starttime;
int slowio_delay_usec = 10000; /* Initial IO delay for background fsck */
int slowio_pollcnt;
int
ftypeok(union dinode *dp)
{
switch (DIP(dp, di_mode) & IFMT) {
case IFDIR:
case IFREG:
case IFBLK:
case IFCHR:
case IFLNK:
case IFSOCK:
case IFIFO:
return (1);
default:
if (debug)
printf("bad file type 0%o\n", DIP(dp, di_mode));
return (0);
}
}
int
reply(const char *question)
{
int persevere;
char c;
if (preen)
pfatal("INTERNAL ERROR: GOT TO reply()");
persevere = !strcmp(question, "CONTINUE");
printf("\n");
if (!persevere && (nflag || (fswritefd < 0 && bkgrdflag == 0))) {
printf("%s? no\n\n", question);
resolved = 0;
return (0);
}
if (yflag || (persevere && nflag)) {
printf("%s? yes\n\n", question);
return (1);
}
do {
printf("%s? [yn] ", question);
(void) fflush(stdout);
c = getc(stdin);
while (c != '\n' && getc(stdin) != '\n') {
if (feof(stdin)) {
resolved = 0;
return (0);
}
}
} while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
printf("\n");
if (c == 'y' || c == 'Y')
return (1);
resolved = 0;
return (0);
}
/*
* Look up state information for an inode.
*/
struct inostat *
inoinfo(ino_t inum)
{
static struct inostat unallocated = { USTATE, 0, 0 };
struct inostatlist *ilp;
int iloff;
if (inum > maxino)
errx(EEXIT, "inoinfo: inumber %d out of range", inum);
ilp = &inostathead[inum / sblock.fs_ipg];
iloff = inum % sblock.fs_ipg;
if (iloff >= ilp->il_numalloced)
return (&unallocated);
return (&ilp->il_stat[iloff]);
}
/*
* Malloc buffers and set up cache.
*/
void
bufinit(void)
{
struct bufarea *bp;
long bufcnt, i;
char *bufp;
pbp = pdirbp = (struct bufarea *)0;
bufp = malloc((unsigned int)sblock.fs_bsize);
if (bufp == 0)
errx(EEXIT, "cannot allocate buffer pool");
cgblk.b_un.b_buf = bufp;
initbarea(&cgblk);
bufhead.b_next = bufhead.b_prev = &bufhead;
bufcnt = MAXBUFSPACE / sblock.fs_bsize;
if (bufcnt < MINBUFS)
bufcnt = MINBUFS;
for (i = 0; i < bufcnt; i++) {
bp = (struct bufarea *)malloc(sizeof(struct bufarea));
bufp = malloc((unsigned int)sblock.fs_bsize);
if (bp == NULL || bufp == NULL) {
if (i >= MINBUFS)
break;
errx(EEXIT, "cannot allocate buffer pool");
}
bp->b_un.b_buf = bufp;
bp->b_prev = &bufhead;
bp->b_next = bufhead.b_next;
bufhead.b_next->b_prev = bp;
bufhead.b_next = bp;
initbarea(bp);
}
bufhead.b_size = i; /* save number of buffers */
}
/*
* Manage a cache of directory blocks.
*/
struct bufarea *
getdatablk(ufs2_daddr_t blkno, long size)
{
struct bufarea *bp;
for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
if (bp->b_bno == fsbtodb(&sblock, blkno))
goto foundit;
for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
if ((bp->b_flags & B_INUSE) == 0)
break;
if (bp == &bufhead)
errx(EEXIT, "deadlocked buffer pool");
getblk(bp, blkno, size);
/* fall through */
foundit:
bp->b_prev->b_next = bp->b_next;
bp->b_next->b_prev = bp->b_prev;
bp->b_prev = &bufhead;
bp->b_next = bufhead.b_next;
bufhead.b_next->b_prev = bp;
bufhead.b_next = bp;
bp->b_flags |= B_INUSE;
return (bp);
}
void
getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
{
ufs2_daddr_t dblk;
totalreads++;
dblk = fsbtodb(&sblock, blk);
if (bp->b_bno != dblk) {
flush(fswritefd, bp);
diskreads++;
bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size);
bp->b_bno = dblk;
bp->b_size = size;
}
}
void
flush(int fd, struct bufarea *bp)
{
int i, j;
if (!bp->b_dirty)
return;
bp->b_dirty = 0;
if (fswritefd < 0) {
pfatal("WRITING IN READ_ONLY MODE.\n");
return;
}
if (bp->b_errs != 0)
pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
(bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
(long long)bp->b_bno);
bp->b_errs = 0;
bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
if (bp != &sblk)
return;
for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
bwrite(fswritefd, (char *)sblock.fs_csp + i,
fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
sblock.fs_cssize - i < sblock.fs_bsize ?
sblock.fs_cssize - i : sblock.fs_bsize);
}
}
void
rwerror(const char *mesg, ufs2_daddr_t blk)
{
if (bkgrdcheck)
exit(EEXIT);
if (preen == 0)
printf("\n");
pfatal("CANNOT %s: %ld", mesg, (long)blk);
if (reply("CONTINUE") == 0)
exit(EEXIT);
}
void
ckfini(int markclean)
{
struct bufarea *bp, *nbp;
int ofsmodified, cnt = 0;
if (bkgrdflag) {
unlink(snapname);
if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) {
cmd.value = FS_UNCLEAN;
cmd.size = markclean ? -1 : 1;
if (sysctlbyname("vfs.ffs.setflags", 0, 0,
&cmd, sizeof cmd) == -1)
rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN);
if (!preen) {
printf("\n***** FILE SYSTEM MARKED %s *****\n",
markclean ? "CLEAN" : "DIRTY");
if (!markclean)
rerun = 1;
}
} else if (!preen && !markclean) {
printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
rerun = 1;
}
}
if (fswritefd < 0) {
(void)close(fsreadfd);
return;
}
flush(fswritefd, &sblk);
if (havesb && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
sblk.b_bno != sblock.fs_sblockloc / dev_bsize &&
!preen && reply("UPDATE STANDARD SUPERBLOCK")) {
sblk.b_bno = sblock.fs_sblockloc / dev_bsize;
sbdirty();
flush(fswritefd, &sblk);
}
flush(fswritefd, &cgblk);
free(cgblk.b_un.b_buf);
for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {
cnt++;
flush(fswritefd, bp);
nbp = bp->b_prev;
free(bp->b_un.b_buf);
free((char *)bp);
}
if (bufhead.b_size != cnt)
errx(EEXIT, "panic: lost %d buffers", bufhead.b_size - cnt);
pbp = pdirbp = (struct bufarea *)0;
if (cursnapshot == 0 && sblock.fs_clean != markclean) {
if ((sblock.fs_clean = markclean) != 0) {
sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK);
sblock.fs_pendingblocks = 0;
sblock.fs_pendinginodes = 0;
}
sbdirty();
ofsmodified = fsmodified;
flush(fswritefd, &sblk);
fsmodified = ofsmodified;
if (!preen) {
printf("\n***** FILE SYSTEM MARKED %s *****\n",
markclean ? "CLEAN" : "DIRTY");
if (!markclean)
rerun = 1;
}
} else if (!preen && !markclean) {
printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
rerun = 1;
}
if (debug && totalreads > 0)
printf("cache missed %ld of %ld (%d%%)\n", diskreads,
totalreads, (int)(diskreads * 100 / totalreads));
(void)close(fsreadfd);
(void)close(fswritefd);
}
int
bread(int fd, char *buf, ufs2_daddr_t blk, long size)
{
char *cp;
int i, errs;
off_t offset;
offset = blk;
offset *= dev_bsize;
if (bkgrdflag)
slowio_start();
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK BLK", blk);
else if (read(fd, buf, (int)size) == size) {
if (bkgrdflag)
slowio_end();
return (0);
}
rwerror("READ BLK", blk);
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK BLK", blk);
errs = 0;
memset(buf, 0, (size_t)size);
printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
if (read(fd, cp, (int)secsize) != secsize) {
(void)lseek(fd, offset + i + secsize, 0);
if (secsize != dev_bsize && dev_bsize != 1)
printf(" %jd (%jd),",
(intmax_t)(blk * dev_bsize + i) / secsize,
(intmax_t)blk + i / dev_bsize);
else
printf(" %jd,", (intmax_t)blk + i / dev_bsize);
errs++;
}
}
printf("\n");
if (errs)
resolved = 0;
return (errs);
}
void
bwrite(int fd, char *buf, ufs2_daddr_t blk, long size)
{
int i;
char *cp;
off_t offset;
if (fd < 0)
return;
offset = blk;
offset *= dev_bsize;
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK BLK", blk);
else if (write(fd, buf, (int)size) == size) {
fsmodified = 1;
return;
}
resolved = 0;
rwerror("WRITE BLK", blk);
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK BLK", blk);
printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
if (write(fd, cp, (int)dev_bsize) != dev_bsize) {
(void)lseek(fd, offset + i + dev_bsize, 0);
printf(" %jd,", (intmax_t)blk + i / dev_bsize);
}
printf("\n");
return;
}
/*
* allocate a data block with the specified number of fragments
*/
ufs2_daddr_t
allocblk(long frags)
{
int i, j, k, cg, baseblk;
struct cg *cgp = &cgrp;
if (frags <= 0 || frags > sblock.fs_frag)
return (0);
for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
for (j = 0; j <= sblock.fs_frag - frags; j++) {
if (testbmap(i + j))
continue;
for (k = 1; k < frags; k++)
if (testbmap(i + j + k))
break;
if (k < frags) {
j += k;
continue;
}
cg = dtog(&sblock, i + j);
getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
if (!cg_chkmagic(cgp))
pfatal("CG %d: BAD MAGIC NUMBER\n", cg);
baseblk = dtogd(&sblock, i + j);
for (k = 0; k < frags; k++) {
setbmap(i + j + k);
clrbit(cg_blksfree(cgp), baseblk + k);
}
n_blks += frags;
if (frags == sblock.fs_frag)
cgp->cg_cs.cs_nbfree--;
else
cgp->cg_cs.cs_nffree -= frags;
cgdirty();
return (i + j);
}
}
return (0);
}
/*
* Free a previously allocated block
*/
void
freeblk(ufs2_daddr_t blkno, long frags)
{
struct inodesc idesc;
idesc.id_blkno = blkno;
idesc.id_numfrags = frags;
(void)pass4check(&idesc);
}
/* Slow down IO so as to leave some disk bandwidth for other processes */
void
slowio_start()
{
/* Delay one in every 8 operations */
slowio_pollcnt = (slowio_pollcnt + 1) & 7;
if (slowio_pollcnt == 0) {
gettimeofday(&slowio_starttime, NULL);
}
}
void
slowio_end()
{
struct timeval tv;
int delay_usec;
if (slowio_pollcnt != 0)
return;
/* Update the slowdown interval. */
gettimeofday(&tv, NULL);
delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 +
(tv.tv_usec - slowio_starttime.tv_usec);
if (delay_usec < 64)
delay_usec = 64;
if (delay_usec > 2500000)
delay_usec = 2500000;
slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6;
/* delay by 8 times the average IO delay */
if (slowio_delay_usec > 64)
usleep(slowio_delay_usec * 8);
}
/*
* Find a pathname
*/
void
getpathname(char *namebuf, ino_t curdir, ino_t ino)
{
int len;
char *cp;
struct inodesc idesc;
static int busy = 0;
if (curdir == ino && ino == ROOTINO) {
(void)strcpy(namebuf, "/");
return;
}
if (busy ||
(inoinfo(curdir)->ino_state != DSTATE &&
inoinfo(curdir)->ino_state != DFOUND)) {
(void)strcpy(namebuf, "?");
return;
}
busy = 1;
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_type = DATA;
idesc.id_fix = IGNORE;
cp = &namebuf[MAXPATHLEN - 1];
*cp = '\0';
if (curdir != ino) {
idesc.id_parent = curdir;
goto namelookup;
}
while (ino != ROOTINO) {
idesc.id_number = ino;
idesc.id_func = findino;
idesc.id_name = strdup("..");
if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
break;
namelookup:
idesc.id_number = idesc.id_parent;
idesc.id_parent = ino;
idesc.id_func = findname;
idesc.id_name = namebuf;
if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
break;
len = strlen(namebuf);
cp -= len;
memmove(cp, namebuf, (size_t)len);
*--cp = '/';
if (cp < &namebuf[MAXNAMLEN])
break;
ino = idesc.id_number;
}
busy = 0;
if (ino != ROOTINO)
*--cp = '?';
memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
}
void
catch(int sig __unused)
{
ckfini(0);
exit(12);
}
/*
* When preening, allow a single quit to signal
* a special exit after file system checks complete
* so that reboot sequence may be interrupted.
*/
void
catchquit(int sig __unused)
{
printf("returning to single-user after file system check\n");
returntosingle = 1;
(void)signal(SIGQUIT, SIG_DFL);
}
/*
* determine whether an inode should be fixed.
*/
int
dofix(struct inodesc *idesc, const char *msg)
{
switch (idesc->id_fix) {
case DONTKNOW:
if (idesc->id_type == DATA)
direrror(idesc->id_number, msg);
else
pwarn("%s", msg);
if (preen) {
printf(" (SALVAGED)\n");
idesc->id_fix = FIX;
return (ALTERED);
}
if (reply("SALVAGE") == 0) {
idesc->id_fix = NOFIX;
return (0);
}
idesc->id_fix = FIX;
return (ALTERED);
case FIX:
return (ALTERED);
case NOFIX:
case IGNORE:
return (0);
default:
errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
}
/* NOTREACHED */
return (0);
}
#include <stdarg.h>
/*
* An unexpected inconsistency occured.
* Die if preening or file system is running with soft dependency protocol,
* otherwise just print message and continue.
*/
void
pfatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (!preen) {
(void)vfprintf(stdout, fmt, ap);
va_end(ap);
if (usedsoftdep)
(void)fprintf(stdout,
"\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n");
/*
* Force foreground fsck to clean up inconsistency.
*/
if (bkgrdflag) {
cmd.value = FS_NEEDSFSCK;
cmd.size = 1;
if (sysctlbyname("vfs.ffs.setflags", 0, 0,
&cmd, sizeof cmd) == -1)
pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
fprintf(stdout, "CANNOT RUN IN BACKGROUND\n");
ckfini(0);
exit(EEXIT);
}
return;
}
if (cdevname == NULL)
cdevname = strdup("fsck");
(void)fprintf(stdout, "%s: ", cdevname);
(void)vfprintf(stdout, fmt, ap);
(void)fprintf(stdout,
"\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n",
cdevname, usedsoftdep ? " SOFT UPDATE " : " ");
/*
* Force foreground fsck to clean up inconsistency.
*/
if (bkgrdflag) {
cmd.value = FS_NEEDSFSCK;
cmd.size = 1;
if (sysctlbyname("vfs.ffs.setflags", 0, 0,
&cmd, sizeof cmd) == -1)
pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
}
ckfini(0);
exit(EEXIT);
}
/*
* Pwarn just prints a message when not preening or running soft dependency
* protocol, or a warning (preceded by filename) when preening.
*/
void
pwarn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (preen)
(void)fprintf(stdout, "%s: ", cdevname);
(void)vfprintf(stdout, fmt, ap);
va_end(ap);
}
/*
* Stub for routines from kernel.
*/
void
panic(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
pfatal("INTERNAL INCONSISTENCY:");
(void)vfprintf(stdout, fmt, ap);
va_end(ap);
exit(EEXIT);
}