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freebsd-nq/sbin/fsck_ffs/fsutil.c
Kirk McKusick c0bfa109b9 Have fsck_ffs(8) properly correct superblock check-hash failures. 
Part of the problem was that fsck_ffs would read the superblock
multiple times complaining and repairing the superblock check hash
each time and then at the end failing to write out the superblock
with the corrected check hash. This fix reads the superblock just
once and if the check hash is corrected ensures that the fixed
superblock gets written.

Tested by:    Peter Holm
PR:           245916
MFC after:    1 week
Sponsored by: Netflix
2022-02-04 11:47:48 -08:00

1338 lines
32 KiB
C
Raw Blame History

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
*/
#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("$FreeBSD$");
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/disk.h>
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/stat.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 <time.h>
#include <unistd.h>
#include <libufs.h>
#include "fsck.h"
int sujrecovery = 0;
static struct bufarea *allocbuf(const char *);
static void cg_write(struct bufarea *);
static void slowio_start(void);
static void slowio_end(void);
static void printIOstats(void);
static void prtbuf(const char *, struct bufarea *);
static long diskreads, totaldiskreads, totalreads; /* Disk cache statistics */
static struct timespec startpass, finishpass;
struct timeval slowio_starttime;
int slowio_delay_usec = 10000; /* Initial IO delay for background fsck */
int slowio_pollcnt;
static struct bufarea cgblk; /* backup buffer for cylinder group blocks */
static TAILQ_HEAD(bufqueue, bufarea) bufqueuehd; /* head of buffer cache LRU */
static LIST_HEAD(bufhash, bufarea) bufhashhd[HASHSIZE]; /* buffer hash list */
static int numbufs; /* size of buffer cache */
static int cachelookups; /* number of cache lookups */
static int cachereads; /* number of cache reads */
static int flushtries; /* number of tries to reclaim memory */
char *buftype[BT_NUMBUFTYPES] = BT_NAMES;
void
fsutilinit(void)
{
diskreads = totaldiskreads = totalreads = 0;
bzero(&startpass, sizeof(struct timespec));
bzero(&finishpass, sizeof(struct timespec));
bzero(&slowio_starttime, sizeof(struct timeval));
slowio_delay_usec = 10000;
slowio_pollcnt = 0;
flushtries = 0;
}
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 %ju out of range",
(uintmax_t)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)
{
int i;
if ((cgblk.b_un.b_buf = Malloc((unsigned int)sblock.fs_bsize)) == NULL)
errx(EEXIT, "Initial malloc(%d) failed", sblock.fs_bsize);
initbarea(&cgblk, BT_CYLGRP);
numbufs = cachelookups = cachereads = 0;
TAILQ_INIT(&bufqueuehd);
for (i = 0; i < HASHSIZE; i++)
LIST_INIT(&bufhashhd[i]);
for (i = 0; i < BT_NUMBUFTYPES; i++) {
readtime[i].tv_sec = totalreadtime[i].tv_sec = 0;
readtime[i].tv_nsec = totalreadtime[i].tv_nsec = 0;
readcnt[i] = totalreadcnt[i] = 0;
}
}
static struct bufarea *
allocbuf(const char *failreason)
{
struct bufarea *bp;
char *bufp;
bp = (struct bufarea *)Malloc(sizeof(struct bufarea));
bufp = Malloc((unsigned int)sblock.fs_bsize);
if (bp == NULL || bufp == NULL) {
errx(EEXIT, "%s", failreason);
/* NOTREACHED */
}
numbufs++;
bp->b_un.b_buf = bufp;
TAILQ_INSERT_HEAD(&bufqueuehd, bp, b_list);
initbarea(bp, BT_UNKNOWN);
return (bp);
}
/*
* Manage cylinder group buffers.
*
* Use getblk() here rather than cgget() because the cylinder group
* may be corrupted but we want it anyway so we can fix it.
*/
static struct bufarea *cgbufs; /* header for cylinder group cache */
static int flushtries; /* number of tries to reclaim memory */
struct bufarea *
cglookup(int cg)
{
struct bufarea *cgbp;
struct cg *cgp;
if ((unsigned) cg >= sblock.fs_ncg)
errx(EEXIT, "cglookup: out of range cylinder group %d", cg);
if (cgbufs == NULL) {
cgbufs = calloc(sblock.fs_ncg, sizeof(struct bufarea));
if (cgbufs == NULL)
errx(EEXIT, "Cannot allocate cylinder group buffers");
}
cgbp = &cgbufs[cg];
if (cgbp->b_un.b_cg != NULL)
return (cgbp);
cgp = NULL;
if (flushtries == 0)
cgp = Malloc((unsigned int)sblock.fs_cgsize);
if (cgp == NULL) {
if (sujrecovery)
errx(EEXIT,"Ran out of memory during journal recovery");
flush(fswritefd, &cgblk);
getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
return (&cgblk);
}
cgbp->b_un.b_cg = cgp;
initbarea(cgbp, BT_CYLGRP);
getblk(cgbp, cgtod(&sblock, cg), sblock.fs_cgsize);
return (cgbp);
}
/*
* Mark a cylinder group buffer as dirty.
* Update its check-hash if they are enabled.
*/
void
cgdirty(struct bufarea *cgbp)
{
struct cg *cg;
cg = cgbp->b_un.b_cg;
if ((sblock.fs_metackhash & CK_CYLGRP) != 0) {
cg->cg_ckhash = 0;
cg->cg_ckhash =
calculate_crc32c(~0L, (void *)cg, sblock.fs_cgsize);
}
dirty(cgbp);
}
/*
* Attempt to flush a cylinder group cache entry.
* Return whether the flush was successful.
*/
int
flushentry(void)
{
struct bufarea *cgbp;
if (sujrecovery || flushtries == sblock.fs_ncg || cgbufs == NULL)
return (0);
cgbp = &cgbufs[flushtries++];
if (cgbp->b_un.b_cg == NULL)
return (0);
flush(fswritefd, cgbp);
free(cgbp->b_un.b_buf);
cgbp->b_un.b_buf = NULL;
return (1);
}
/*
* Manage a cache of directory blocks.
*/
struct bufarea *
getdatablk(ufs2_daddr_t blkno, long size, int type)
{
struct bufarea *bp;
struct bufhash *bhdp;
cachelookups++;
/* If out of range, return empty buffer with b_err == -1 */
if (type != BT_INODES && chkrange(blkno, size / sblock.fs_fsize)) {
blkno = -1;
type = BT_EMPTY;
}
bhdp = &bufhashhd[HASH(blkno)];
LIST_FOREACH(bp, bhdp, b_hash)
if (bp->b_bno == fsbtodb(&sblock, blkno)) {
if (debug && bp->b_size != size) {
prtbuf("getdatablk: size mismatch", bp);
pfatal("getdatablk: b_size %d != size %ld\n",
bp->b_size, size);
}
goto foundit;
}
/*
* Move long-term busy buffer back to the front of the LRU so we
* do not endless inspect them for recycling.
*/
bp = TAILQ_LAST(&bufqueuehd, bufqueue);
if (bp != NULL && bp->b_refcnt != 0) {
TAILQ_REMOVE(&bufqueuehd, bp, b_list);
TAILQ_INSERT_HEAD(&bufqueuehd, bp, b_list);
}
/*
* Allocate up to the minimum number of buffers before
* considering recycling any of them.
*/
if (size > sblock.fs_bsize)
errx(EEXIT, "Excessive buffer size %ld > %d\n", size,
sblock.fs_bsize);
if (numbufs < MINBUFS) {
bp = allocbuf("cannot create minimal buffer pool");
} else if (sujrecovery) {
/*
* SUJ recovery does not want anything written until it
* has successfully completed (so it can fail back to
* full fsck). Thus, we can only recycle clean buffers.
*/
TAILQ_FOREACH_REVERSE(bp, &bufqueuehd, bufqueue, b_list)
if ((bp->b_flags & B_DIRTY) == 0 && bp->b_refcnt == 0)
break;
if (bp == NULL)
bp = allocbuf("Ran out of memory during "
"journal recovery");
else
LIST_REMOVE(bp, b_hash);
} else {
/*
* Recycle oldest non-busy buffer.
*/
TAILQ_FOREACH_REVERSE(bp, &bufqueuehd, bufqueue, b_list)
if (bp->b_refcnt == 0)
break;
if (bp == NULL)
bp = allocbuf("Ran out of memory for buffers");
else
LIST_REMOVE(bp, b_hash);
}
flush(fswritefd, bp);
bp->b_type = type;
LIST_INSERT_HEAD(bhdp, bp, b_hash);
getblk(bp, blkno, size);
cachereads++;
/* fall through */
foundit:
if (debug && bp->b_type != type) {
printf("getdatablk: buffer type changed to %s",
BT_BUFTYPE(type));
prtbuf("", bp);
}
TAILQ_REMOVE(&bufqueuehd, bp, b_list);
TAILQ_INSERT_HEAD(&bufqueuehd, bp, b_list);
if (bp->b_errs == 0)
bp->b_refcnt++;
return (bp);
}
void
getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
{
ufs2_daddr_t dblk;
struct timespec start, finish;
dblk = fsbtodb(&sblock, blk);
if (bp->b_bno == dblk) {
totalreads++;
} else {
if (debug) {
readcnt[bp->b_type]++;
clock_gettime(CLOCK_REALTIME_PRECISE, &start);
}
if (bp->b_type != BT_EMPTY)
bp->b_errs =
blread(fsreadfd, bp->b_un.b_buf, dblk, size);
else
bp->b_errs = -1;
if (debug) {
clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
timespecsub(&finish, &start, &finish);
timespecadd(&readtime[bp->b_type], &finish,
&readtime[bp->b_type]);
}
bp->b_bno = dblk;
bp->b_size = size;
}
}
void
brelse(struct bufarea *bp)
{
if (bp->b_refcnt <= 0)
prtbuf("brelse: buffer with negative reference count", bp);
bp->b_refcnt--;
}
void
flush(int fd, struct bufarea *bp)
{
struct inode ip;
if ((bp->b_flags & B_DIRTY) == 0)
return;
bp->b_flags &= ~B_DIRTY;
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;
/*
* Write using the appropriate function.
*/
switch (bp->b_type) {
case BT_SUPERBLK:
if (bp != &sblk)
pfatal("BUFFER %p DOES NOT MATCH SBLK %p\n",
bp, &sblk);
if (sbput(fd, bp->b_un.b_fs, 0) == 0)
fsmodified = 1;
break;
case BT_CYLGRP:
if (sujrecovery)
cg_write(bp);
if (cgput(fswritefd, &sblock, bp->b_un.b_cg) == 0)
fsmodified = 1;
break;
case BT_INODES:
if (debug && sblock.fs_magic == FS_UFS2_MAGIC) {
struct ufs2_dinode *dp = bp->b_un.b_dinode2;
int i;
for (i = 0; i < INOPB(&sblock); dp++, i++) {
if (ffs_verify_dinode_ckhash(&sblock, dp) == 0)
continue;
pwarn("flush: INODE CHECK-HASH FAILED");
ip.i_bp = bp;
ip.i_dp = (union dinode *)dp;
ip.i_number = bp->b_index + i;
prtinode(&ip);
if (preen || reply("FIX") != 0) {
if (preen)
printf(" (FIXED)\n");
ffs_update_dinode_ckhash(&sblock, dp);
inodirty(&ip);
}
}
}
/* FALLTHROUGH */
default:
blwrite(fd, bp->b_un.b_buf, bp->b_bno, bp->b_size);
break;
}
}
/*
* Journaled soft updates does not maintain cylinder group summary
* information during cleanup, so this routine recalculates the summary
* information and updates the superblock summary in preparation for
* writing out the cylinder group.
*/
static void
cg_write(struct bufarea *bp)
{
ufs1_daddr_t fragno, cgbno, maxbno;
u_int8_t *blksfree;
struct cg *cgp;
int blk;
int i;
/*
* Fix the frag and cluster summary.
*/
cgp = bp->b_un.b_cg;
cgp->cg_cs.cs_nbfree = 0;
cgp->cg_cs.cs_nffree = 0;
bzero(&cgp->cg_frsum, sizeof(cgp->cg_frsum));
maxbno = fragstoblks(&sblock, sblock.fs_fpg);
if (sblock.fs_contigsumsize > 0) {
for (i = 1; i <= sblock.fs_contigsumsize; i++)
cg_clustersum(cgp)[i] = 0;
bzero(cg_clustersfree(cgp), howmany(maxbno, CHAR_BIT));
}
blksfree = cg_blksfree(cgp);
for (cgbno = 0; cgbno < maxbno; cgbno++) {
if (ffs_isfreeblock(&sblock, blksfree, cgbno))
continue;
if (ffs_isblock(&sblock, blksfree, cgbno)) {
ffs_clusteracct(&sblock, cgp, cgbno, 1);
cgp->cg_cs.cs_nbfree++;
continue;
}
fragno = blkstofrags(&sblock, cgbno);
blk = blkmap(&sblock, blksfree, fragno);
ffs_fragacct(&sblock, blk, cgp->cg_frsum, 1);
for (i = 0; i < sblock.fs_frag; i++)
if (isset(blksfree, fragno + i))
cgp->cg_cs.cs_nffree++;
}
/*
* Update the superblock cg summary from our now correct values
* before writing the block.
*/
sblock.fs_cs(&sblock, cgp->cg_cgx) = cgp->cg_cs;
}
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;
struct inoinfo *inp, *ninp;
int ofsmodified, cnt, cg, i;
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)
pwarn("CANNOT SET FILE SYSTEM DIRTY FLAG\n");
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;
}
bkgrdflag = 0;
}
if (debug && cachelookups > 0)
printf("cache with %d buffers missed %d of %d (%d%%)\n",
numbufs, cachereads, cachelookups,
(int)(cachereads * 100 / cachelookups));
if (fswritefd < 0) {
(void)close(fsreadfd);
return;
}
/*
* To remain idempotent with partial truncations the buffers
* must be flushed in this order:
* 1) cylinder groups (bitmaps)
* 2) indirect, directory, external attribute, and data blocks
* 3) inode blocks
* 4) superblock
* This ordering preserves access to the modified pointers
* until they are freed.
*/
/* Step 1: cylinder groups */
if (debug)
printf("Flush Cylinder groups\n");
if (cgbufs != NULL) {
for (cnt = 0; cnt < sblock.fs_ncg; cnt++) {
if (cgbufs[cnt].b_un.b_cg == NULL)
continue;
flush(fswritefd, &cgbufs[cnt]);
free(cgbufs[cnt].b_un.b_cg);
}
free(cgbufs);
cgbufs = NULL;
}
flush(fswritefd, &cgblk);
free(cgblk.b_un.b_buf);
cgblk.b_un.b_buf = NULL;
cnt = 0;
/* Step 2: indirect, directory, external attribute, and data blocks */
if (debug)
printf("Flush indirect, directory, external attribute, "
"and data blocks\n");
if (pdirbp != NULL) {
brelse(pdirbp);
pdirbp = NULL;
}
TAILQ_FOREACH_REVERSE_SAFE(bp, &bufqueuehd, bufqueue, b_list, nbp) {
switch (bp->b_type) {
/* These should not be in the buffer cache list */
case BT_UNKNOWN:
case BT_SUPERBLK:
case BT_CYLGRP:
default:
prtbuf("ckfini: improper buffer type on cache list",bp);
continue;
/* These are the ones to flush in this step */
case BT_EMPTY:
if (bp->b_bno >= 0)
pfatal("Unused BT_EMPTY buffer for block %jd\n",
(intmax_t)bp->b_bno);
/* FALLTHROUGH */
case BT_LEVEL1:
case BT_LEVEL2:
case BT_LEVEL3:
case BT_EXTATTR:
case BT_DIRDATA:
case BT_DATA:
break;
/* These are the ones to flush in the next step */
case BT_INODES:
continue;
}
if (debug && bp->b_refcnt != 0) {
prtbuf("ckfini: clearing in-use buffer", bp);
pfatal("ckfini: clearing in-use buffer\n");
}
TAILQ_REMOVE(&bufqueuehd, bp, b_list);
cnt++;
flush(fswritefd, bp);
free(bp->b_un.b_buf);
free((char *)bp);
}
/* Step 3: inode blocks */
if (debug)
printf("Flush inode blocks\n");
if (icachebp != NULL) {
brelse(icachebp);
icachebp = NULL;
}
TAILQ_FOREACH_REVERSE_SAFE(bp, &bufqueuehd, bufqueue, b_list, nbp) {
if (debug && bp->b_refcnt != 0) {
prtbuf("ckfini: clearing in-use buffer", bp);
pfatal("ckfini: clearing in-use buffer\n");
}
TAILQ_REMOVE(&bufqueuehd, bp, b_list);
cnt++;
flush(fswritefd, bp);
free(bp->b_un.b_buf);
free((char *)bp);
}
if (numbufs != cnt)
errx(EEXIT, "panic: lost %d buffers", numbufs - cnt);
/* Step 4: superblock */
if (debug)
printf("Flush the superblock\n");
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")) {
/* Change the write destination to standard superblock */
sblock.fs_sblockactualloc = sblock.fs_sblockloc;
sblk.b_bno = sblock.fs_sblockloc / dev_bsize;
sbdirty();
flush(fswritefd, &sblk);
}
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) {
if (markclean) {
printf("\n***** FILE SYSTEM IS CLEAN *****\n");
} else {
printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
rerun = 1;
}
}
/*
* Free allocated tracking structures.
*/
if (blockmap != NULL)
free(blockmap);
blockmap = NULL;
if (inostathead != NULL) {
for (cg = 0; cg < sblock.fs_ncg; cg++)
if (inostathead[cg].il_stat != NULL)
free((char *)inostathead[cg].il_stat);
free(inostathead);
}
inostathead = NULL;
if (inpsort != NULL)
free(inpsort);
inpsort = NULL;
if (inphead != NULL) {
for (i = 0; i < dirhash; i++) {
for (inp = inphead[i]; inp != NULL; inp = ninp) {
ninp = inp->i_nexthash;
free(inp);
}
}
free(inphead);
}
inphead = NULL;
finalIOstats();
(void)close(fsreadfd);
(void)close(fswritefd);
}
/*
* Print out I/O statistics.
*/
void
IOstats(char *what)
{
int i;
if (debug == 0)
return;
if (diskreads == 0) {
printf("%s: no I/O\n\n", what);
return;
}
if (startpass.tv_sec == 0)
startpass = startprog;
printf("%s: I/O statistics\n", what);
printIOstats();
totaldiskreads += diskreads;
diskreads = 0;
for (i = 0; i < BT_NUMBUFTYPES; i++) {
timespecadd(&totalreadtime[i], &readtime[i], &totalreadtime[i]);
totalreadcnt[i] += readcnt[i];
readtime[i].tv_sec = readtime[i].tv_nsec = 0;
readcnt[i] = 0;
}
clock_gettime(CLOCK_REALTIME_PRECISE, &startpass);
}
void
finalIOstats(void)
{
int i;
if (debug == 0)
return;
printf("Final I/O statistics\n");
totaldiskreads += diskreads;
diskreads = totaldiskreads;
startpass = startprog;
for (i = 0; i < BT_NUMBUFTYPES; i++) {
timespecadd(&totalreadtime[i], &readtime[i], &totalreadtime[i]);
totalreadcnt[i] += readcnt[i];
readtime[i] = totalreadtime[i];
readcnt[i] = totalreadcnt[i];
}
printIOstats();
}
static void printIOstats(void)
{
long long msec, totalmsec;
int i;
clock_gettime(CLOCK_REALTIME_PRECISE, &finishpass);
timespecsub(&finishpass, &startpass, &finishpass);
printf("Running time: %jd.%03ld sec\n",
(intmax_t)finishpass.tv_sec, finishpass.tv_nsec / 1000000);
printf("buffer reads by type:\n");
for (totalmsec = 0, i = 0; i < BT_NUMBUFTYPES; i++)
totalmsec += readtime[i].tv_sec * 1000 +
readtime[i].tv_nsec / 1000000;
if (totalmsec == 0)
totalmsec = 1;
for (i = 0; i < BT_NUMBUFTYPES; i++) {
if (readcnt[i] == 0)
continue;
msec =
readtime[i].tv_sec * 1000 + readtime[i].tv_nsec / 1000000;
printf("%21s:%8ld %2ld.%ld%% %4jd.%03ld sec %2lld.%lld%%\n",
buftype[i], readcnt[i], readcnt[i] * 100 / diskreads,
(readcnt[i] * 1000 / diskreads) % 10,
(intmax_t)readtime[i].tv_sec, readtime[i].tv_nsec / 1000000,
msec * 100 / totalmsec, (msec * 1000 / totalmsec) % 10);
}
printf("\n");
}
int
blread(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();
totalreads++;
diskreads++;
if (pread(fd, buf, (int)size, offset) == size) {
if (bkgrdflag)
slowio_end();
return (0);
}
/*
* This is handled specially here instead of in rwerror because
* rwerror is used for all sorts of errors, not just true read/write
* errors. It should be refactored and fixed.
*/
if (surrender) {
pfatal("CANNOT READ_BLK: %ld", (long)blk);
errx(EEXIT, "ABORTING DUE TO READ ERRORS");
} else
rwerror("READ 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 (pread(fd, cp, (int)secsize, offset + i) != secsize) {
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
blwrite(int fd, char *buf, ufs2_daddr_t blk, ssize_t size)
{
int i;
char *cp;
off_t offset;
if (fd < 0)
return;
offset = blk;
offset *= dev_bsize;
if (pwrite(fd, buf, size, offset) == size) {
fsmodified = 1;
return;
}
resolved = 0;
rwerror("WRITE BLK", blk);
printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
if (pwrite(fd, cp, dev_bsize, offset + i) != dev_bsize)
printf(" %jd,", (intmax_t)blk + i / dev_bsize);
printf("\n");
return;
}
void
blerase(int fd, ufs2_daddr_t blk, long size)
{
off_t ioarg[2];
if (fd < 0)
return;
ioarg[0] = blk * dev_bsize;
ioarg[1] = size;
ioctl(fd, DIOCGDELETE, ioarg);
/* we don't really care if we succeed or not */
return;
}
/*
* Fill a contiguous region with all-zeroes. Note ZEROBUFSIZE is by
* definition a multiple of dev_bsize.
*/
void
blzero(int fd, ufs2_daddr_t blk, long size)
{
static char *zero;
off_t offset, len;
if (fd < 0)
return;
if (zero == NULL) {
zero = calloc(ZEROBUFSIZE, 1);
if (zero == NULL)
errx(EEXIT, "cannot allocate buffer pool");
}
offset = blk * dev_bsize;
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK BLK", blk);
while (size > 0) {
len = MIN(ZEROBUFSIZE, size);
if (write(fd, zero, len) != len)
rwerror("WRITE BLK", blk);
blk += len / dev_bsize;
size -= len;
}
}
/*
* Verify cylinder group's magic number and other parameters. If the
* test fails, offer an option to rebuild the whole cylinder group.
*/
int
check_cgmagic(int cg, struct bufarea *cgbp, int request_rebuild)
{
struct cg *cgp = cgbp->b_un.b_cg;
uint32_t cghash, calchash;
static int prevfailcg = -1;
/*
* Extended cylinder group checks.
*/
calchash = cgp->cg_ckhash;
if ((sblock.fs_metackhash & CK_CYLGRP) != 0 &&
(ckhashadd & CK_CYLGRP) == 0) {
cghash = cgp->cg_ckhash;
cgp->cg_ckhash = 0;
calchash = calculate_crc32c(~0L, (void *)cgp, sblock.fs_cgsize);
cgp->cg_ckhash = cghash;
}
if (cgp->cg_ckhash == calchash &&
cg_chkmagic(cgp) &&
cgp->cg_cgx == cg &&
((sblock.fs_magic == FS_UFS1_MAGIC &&
cgp->cg_old_niblk == sblock.fs_ipg &&
cgp->cg_ndblk <= sblock.fs_fpg &&
cgp->cg_old_ncyl <= sblock.fs_old_cpg) ||
(sblock.fs_magic == FS_UFS2_MAGIC &&
cgp->cg_niblk == sblock.fs_ipg &&
cgp->cg_ndblk <= sblock.fs_fpg &&
cgp->cg_initediblk <= sblock.fs_ipg))) {
return (1);
}
if (prevfailcg == cg)
return (0);
prevfailcg = cg;
pfatal("CYLINDER GROUP %d: INTEGRITY CHECK FAILED", cg);
if (!request_rebuild) {
printf("\n");
return (0);
}
if (!reply("REBUILD CYLINDER GROUP")) {
printf("YOU WILL NEED TO RERUN FSCK.\n");
rerun = 1;
return (1);
}
/*
* Zero out the cylinder group and then initialize critical fields.
* Bit maps and summaries will be recalculated by later passes.
*/
memset(cgp, 0, (size_t)sblock.fs_cgsize);
cgp->cg_magic = CG_MAGIC;
cgp->cg_cgx = cg;
cgp->cg_niblk = sblock.fs_ipg;
cgp->cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
if (cgbase(&sblock, cg) + sblock.fs_fpg < sblock.fs_size)
cgp->cg_ndblk = sblock.fs_fpg;
else
cgp->cg_ndblk = sblock.fs_size - cgbase(&sblock, cg);
cgp->cg_iusedoff = &cgp->cg_space[0] - (u_char *)(&cgp->cg_firstfield);
if (sblock.fs_magic == FS_UFS1_MAGIC) {
cgp->cg_niblk = 0;
cgp->cg_initediblk = 0;
cgp->cg_old_ncyl = sblock.fs_old_cpg;
cgp->cg_old_niblk = sblock.fs_ipg;
cgp->cg_old_btotoff = cgp->cg_iusedoff;
cgp->cg_old_boff = cgp->cg_old_btotoff +
sblock.fs_old_cpg * sizeof(int32_t);
cgp->cg_iusedoff = cgp->cg_old_boff +
sblock.fs_old_cpg * sizeof(u_int16_t);
}
cgp->cg_freeoff = cgp->cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
cgp->cg_nextfreeoff = cgp->cg_freeoff + howmany(sblock.fs_fpg,CHAR_BIT);
if (sblock.fs_contigsumsize > 0) {
cgp->cg_nclusterblks = cgp->cg_ndblk / sblock.fs_frag;
cgp->cg_clustersumoff =
roundup(cgp->cg_nextfreeoff, sizeof(u_int32_t));
cgp->cg_clustersumoff -= sizeof(u_int32_t);
cgp->cg_clusteroff = cgp->cg_clustersumoff +
(sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
cgp->cg_nextfreeoff = cgp->cg_clusteroff +
howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
}
cgdirty(cgbp);
return (0);
}
/*
* allocate a data block with the specified number of fragments
*/
ufs2_daddr_t
allocblk(long frags)
{
int i, j, k, cg, baseblk;
struct bufarea *cgbp;
struct cg *cgp;
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);
cgbp = cglookup(cg);
cgp = cgbp->b_un.b_cg;
if (!check_cgmagic(cg, cgbp, 0)) {
i = (cg + 1) * sblock.fs_fpg - sblock.fs_frag;
continue;
}
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(cgbp);
return (i + j);
}
}
return (0);
}
/*
* 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 inode ip;
struct inodesc idesc;
static int busy = 0;
if (curdir == ino && ino == UFS_ROOTINO) {
(void)strcpy(namebuf, "/");
return;
}
if (busy || !INO_IS_DVALID(curdir)) {
(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 != UFS_ROOTINO) {
idesc.id_number = ino;
idesc.id_func = findino;
idesc.id_name = strdup("..");
ginode(ino, &ip);
if ((ckinode(ip.i_dp, &idesc) & FOUND) == 0) {
irelse(&ip);
break;
}
irelse(&ip);
namelookup:
idesc.id_number = idesc.id_parent;
idesc.id_parent = ino;
idesc.id_func = findname;
idesc.id_name = namebuf;
ginode(idesc.id_number, &ip);
if ((ckinode(ip.i_dp, &idesc) & FOUND) == 0) {
irelse(&ip);
break;
}
irelse(&ip);
len = strlen(namebuf);
cp -= len;
memmove(cp, namebuf, (size_t)len);
*--cp = '/';
if (cp < &namebuf[UFS_MAXNAMLEN])
break;
ino = idesc.id_number;
}
busy = 0;
if (ino != UFS_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>
/*
* Print details about a buffer.
*/
static void
prtbuf(const char *msg, struct bufarea *bp)
{
printf("%s: bp %p, type %s, bno %jd, size %d, refcnt %d, flags %s, "
"index %jd\n", msg, bp, BT_BUFTYPE(bp->b_type), (intmax_t) bp->b_bno,
bp->b_size, bp->b_refcnt, bp->b_flags & B_DIRTY ? "dirty" : "clean",
(intmax_t) bp->b_index);
}
/*
* An unexpected inconsistency occurred.
* 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);
}
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