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freebsd/sbin/fsck_ffs/fsutil.c
Kirk McKusick 1c85e6a35d This commit adds basic support for the UFS2 filesystem. The UFS2 
filesystem expands the inode to 256 bytes to make space for 64-bit
block pointers. It also adds a file-creation time field, an ability
to use jumbo blocks per inode to allow extent like pointer density,
and space for extended attributes (up to twice the filesystem block
size worth of attributes, e.g., on a 16K filesystem, there is space
for 32K of attributes). UFS2 fully supports and runs existing UFS1
filesystems. New filesystems built using newfs can be built in either
UFS1 or UFS2 format using the -O option. In this commit UFS1 is
the default format, so if you want to build UFS2 format filesystems,
you must specify -O 2. This default will be changed to UFS2 when
UFS2 proves itself to be stable. In this commit the boot code for
reading UFS2 filesystems is not compiled (see /sys/boot/common/ufsread.c)
as there is insufficient space in the boot block. Once the size of the
boot block is increased, this code can be defined.

Things to note: the definition of SBSIZE has changed to SBLOCKSIZE.
The header file <ufs/ufs/dinode.h> must be included before
<ufs/ffs/fs.h> so as to get the definitions of ufs2_daddr_t and
ufs_lbn_t.

Still TODO:
Verify that the first level bootstraps work for all the architectures.
Convert the utility ffsinfo to understand UFS2 and test growfs.
Add support for the extended attribute storage. Update soft updates
to ensure integrity of extended attribute storage. Switch the
current extended attribute interfaces to use the extended attribute
storage. Add the extent like functionality (framework is there,
but is currently never used).

Sponsored by: DARPA & NAI Labs.
Reviewed by:	Poul-Henning Kamp <phk@freebsd.org>
2002-06-21 06:18:05 +00:00

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/*
* 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.
*/
#ifndef lint
#if 0
static const char sccsid[] = "@(#)utilities.c 8.6 (Berkeley) 5/19/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "fsck.h"
long diskreads, totalreads; /* Disk cache statistics */
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(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 %d TO DISK\n",
(bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
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(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 FILESYSTEM 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 != fsbtodb(&sblock, sblock.fs_sblockloc) &&
!preen && reply("UPDATE STANDARD SUPERBLOCK")) {
sblk.b_bno = fsbtodb(&sblock, sblock.fs_sblockloc);
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);
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 (lseek(fd, offset, 0) < 0)
rwerror("SEEK BLK", blk);
else if (read(fd, buf, (int)size) == size)
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(" %ld (%ld),",
(blk * dev_bsize + i) / secsize,
blk + i / dev_bsize);
else
printf(" %ld,", 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(" %ld,", 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);
}
/*
* 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 = "..";
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)
{
ckfini(0);
exit(12);
}
/*
* When preening, allow a single quit to signal
* a special exit after filesystem checks complete
* so that reboot sequence may be interrupted.
*/
void
catchquit(int sig)
{
printf("returning to single-user after filesystem check\n");
returntosingle = 1;
(void)signal(SIGQUIT, SIG_DFL);
}
/*
* determine whether an inode should be fixed.
*/
int
dofix(struct inodesc *idesc, 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 filesystem 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 = "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);
}
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