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freebsd-dev/sbin/fsck_ffs/pass5.c
Kirk McKusick 0a6e34e950 Fix size differences between architectures of the UFS/FFS CGSIZE macro value. 
The cylinder group header structure ended with `u_int8_t cg_space[1]'
representing the beginning of the inode bitmap array. Some architectures
like the i386 rounded this up to a 4-byte boundry while other
architectures like the amd64 rounded it up to an 8-byte boundry.
Thus sizeof(struct cg) was four bytes bigger on an amd64 machine
than on an i386 machine. If a filesystem created on an i386 machine
was moved to an amd64 machine, the size of the cylinder group
calculated by the CGSIZE macro would appear to grow by four bytes.
Filesystems whose cylinder groups were exactly equal to the block
size on an i386 machine would appear to have a cylinder group that
was four bytes too big when moved to an amd64 machine. Note that
although the structure appears to be too big, it in fact is fine.
It is just the calaculation of its size that is in error.

The fix is to remove the cg_space element from the cylinder-group
structure so that the calculated size of the structure is the same
size on all architectures.

Reported by:  Tijl Coosemans
Tested by:    Tijl Coosemans and Peter Holm
MFC after:    1 week
Sponsored by: The FreeBSD Foundation
2023-05-15 12:57:15 -07:00

641 lines
18 KiB
C
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/*-
* 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[] = "@(#)pass5.c 8.9 (Berkeley) 4/28/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/sysctl.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <inttypes.h>
#include <limits.h>
#include <string.h>
#include <libufs.h>
#include "fsck.h"
static void check_maps(u_char *, u_char *, int, ufs2_daddr_t, const char *,
int *, int, int, int);
static void clear_blocks(ufs2_daddr_t start, ufs2_daddr_t end);
void
pass5(void)
{
int c, i, j, blk, frags, basesize, mapsize;
int inomapsize, blkmapsize;
struct fs *fs = &sblock;
ufs2_daddr_t d, dbase, dmax, start;
int rewritecg = 0;
ino_t inum;
struct csum *cs;
struct csum_total cstotal;
struct inodesc idesc[3];
char buf[MAXBSIZE];
struct cg *cg, *newcg = (struct cg *)buf;
struct bufarea *cgbp;
inoinfo(UFS_WINO)->ino_state = USTATE;
memset(newcg, 0, (size_t)fs->fs_cgsize);
newcg->cg_niblk = fs->fs_ipg;
/* check to see if we are to add a cylinder group check hash */
if ((ckhashadd & CK_CYLGRP) != 0)
rewritecg = 1;
if (cvtlevel >= 3) {
if (fs->fs_maxcontig < 2 && fs->fs_contigsumsize > 0) {
if (preen)
pwarn("DELETING CLUSTERING MAPS\n");
if (preen || reply("DELETE CLUSTERING MAPS")) {
fs->fs_contigsumsize = 0;
rewritecg = 1;
sbdirty();
}
}
if (fs->fs_maxcontig > 1) {
const char *doit = NULL;
if (fs->fs_contigsumsize < 1) {
doit = "CREAT";
} else if (fs->fs_contigsumsize < fs->fs_maxcontig &&
fs->fs_contigsumsize < FS_MAXCONTIG) {
doit = "EXPAND";
}
if (doit) {
i = fs->fs_contigsumsize;
fs->fs_contigsumsize =
MIN(fs->fs_maxcontig, FS_MAXCONTIG);
if (CGSIZE(fs) > (u_int)fs->fs_bsize) {
pwarn("CANNOT %s CLUSTER MAPS\n", doit);
fs->fs_contigsumsize = i;
} else if (preen ||
reply("CREATE CLUSTER MAPS")) {
if (preen)
pwarn("%sING CLUSTER MAPS\n",
doit);
fs->fs_cgsize =
fragroundup(fs, CGSIZE(fs));
rewritecg = 1;
sbdirty();
}
}
}
}
basesize = sizeof(*newcg);
if (sblock.fs_magic == FS_UFS2_MAGIC) {
newcg->cg_iusedoff = basesize;
} else {
/*
* We reserve the space for the old rotation summary
* tables for the benefit of old kernels, but do not
* maintain them in modern kernels. In time, they can
* go away.
*/
newcg->cg_old_btotoff = basesize;
newcg->cg_old_boff = newcg->cg_old_btotoff +
fs->fs_old_cpg * sizeof(int32_t);
newcg->cg_iusedoff = newcg->cg_old_boff +
fs->fs_old_cpg * fs->fs_old_nrpos * sizeof(u_int16_t);
memset(&newcg[1], 0, newcg->cg_iusedoff - basesize);
}
inomapsize = howmany(fs->fs_ipg, CHAR_BIT);
newcg->cg_freeoff = newcg->cg_iusedoff + inomapsize;
blkmapsize = howmany(fs->fs_fpg, CHAR_BIT);
newcg->cg_nextfreeoff = newcg->cg_freeoff + blkmapsize;
if (fs->fs_contigsumsize > 0) {
newcg->cg_clustersumoff = newcg->cg_nextfreeoff -
sizeof(u_int32_t);
newcg->cg_clustersumoff =
roundup(newcg->cg_clustersumoff, sizeof(u_int32_t));
newcg->cg_clusteroff = newcg->cg_clustersumoff +
(fs->fs_contigsumsize + 1) * sizeof(u_int32_t);
newcg->cg_nextfreeoff = newcg->cg_clusteroff +
howmany(fragstoblks(fs, fs->fs_fpg), CHAR_BIT);
}
newcg->cg_magic = CG_MAGIC;
mapsize = newcg->cg_nextfreeoff - newcg->cg_iusedoff;
memset(&idesc[0], 0, sizeof idesc);
for (i = 0; i < 3; i++)
idesc[i].id_type = ADDR;
memset(&cstotal, 0, sizeof(struct csum_total));
dmax = blknum(fs, fs->fs_size + fs->fs_frag - 1);
for (d = fs->fs_size; d < dmax; d++)
setbmap(d);
for (c = 0; c < fs->fs_ncg; c++) {
if (got_siginfo) {
printf("%s: phase 5: 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 p5 %d%%", cdevname,
c * 100 / sblock.fs_ncg);
got_sigalarm = 0;
}
cgbp = cglookup(c);
cg = cgbp->b_un.b_cg;
if (!cg_chkmagic(cg))
pfatal("CG %d: BAD MAGIC NUMBER\n", c);
/*
* If we have a cylinder group check hash and are not adding
* it for the first time, verify that it is good.
*/
if ((fs->fs_metackhash & CK_CYLGRP) != 0 &&
(ckhashadd & CK_CYLGRP) == 0) {
uint32_t ckhash, thishash;
ckhash = cg->cg_ckhash;
cg->cg_ckhash = 0;
thishash = calculate_crc32c(~0L, cg, fs->fs_cgsize);
if (ckhash == thishash) {
cg->cg_ckhash = ckhash;
} else {
pwarn("CG %d: BAD CHECK-HASH %#x vs %#x\n",
c, ckhash, thishash);
cg->cg_ckhash = thishash;
cgdirty(cgbp);
}
}
newcg->cg_time = cg->cg_time;
newcg->cg_old_time = cg->cg_old_time;
newcg->cg_unrefs = cg->cg_unrefs;
newcg->cg_ckhash = cg->cg_ckhash;
newcg->cg_cgx = c;
dbase = cgbase(fs, c);
dmax = dbase + fs->fs_fpg;
if (dmax > fs->fs_size)
dmax = fs->fs_size;
newcg->cg_ndblk = dmax - dbase;
if (fs->fs_magic == FS_UFS1_MAGIC) {
if (c == fs->fs_ncg - 1)
newcg->cg_old_ncyl = howmany(newcg->cg_ndblk,
fs->fs_fpg / fs->fs_old_cpg);
else
newcg->cg_old_ncyl = fs->fs_old_cpg;
newcg->cg_old_niblk = fs->fs_ipg;
newcg->cg_niblk = 0;
}
if (fs->fs_contigsumsize > 0)
newcg->cg_nclusterblks = newcg->cg_ndblk / fs->fs_frag;
newcg->cg_cs.cs_ndir = 0;
newcg->cg_cs.cs_nffree = 0;
newcg->cg_cs.cs_nbfree = 0;
newcg->cg_cs.cs_nifree = fs->fs_ipg;
if (cg->cg_rotor >= 0 && cg->cg_rotor < newcg->cg_ndblk)
newcg->cg_rotor = cg->cg_rotor;
else
newcg->cg_rotor = 0;
if (cg->cg_frotor >= 0 && cg->cg_frotor < newcg->cg_ndblk)
newcg->cg_frotor = cg->cg_frotor;
else
newcg->cg_frotor = 0;
if (cg->cg_irotor >= 0 && cg->cg_irotor < fs->fs_ipg)
newcg->cg_irotor = cg->cg_irotor;
else
newcg->cg_irotor = 0;
if (fs->fs_magic == FS_UFS1_MAGIC) {
newcg->cg_initediblk = 0;
} else {
if ((unsigned)cg->cg_initediblk > fs->fs_ipg)
newcg->cg_initediblk = fs->fs_ipg;
else
newcg->cg_initediblk = cg->cg_initediblk;
}
memset(&newcg->cg_frsum[0], 0, sizeof newcg->cg_frsum);
memset(cg_inosused(newcg), 0, (size_t)(mapsize));
inum = fs->fs_ipg * c;
for (i = 0; i < inostathead[c].il_numalloced; inum++, i++) {
switch (inoinfo(inum)->ino_state) {
case USTATE:
break;
case DSTATE:
case DCLEAR:
case DFOUND:
case DZLINK:
newcg->cg_cs.cs_ndir++;
/* FALLTHROUGH */
case FSTATE:
case FCLEAR:
case FZLINK:
newcg->cg_cs.cs_nifree--;
setbit(cg_inosused(newcg), i);
break;
default:
if (inum < UFS_ROOTINO)
break;
errx(EEXIT, "BAD STATE %d FOR INODE I=%ju",
inoinfo(inum)->ino_state, (uintmax_t)inum);
}
}
if (c == 0)
for (i = 0; i < (int)UFS_ROOTINO; i++) {
setbit(cg_inosused(newcg), i);
newcg->cg_cs.cs_nifree--;
}
start = -1;
for (i = 0, d = dbase;
d < dmax;
d += fs->fs_frag, i += fs->fs_frag) {
frags = 0;
for (j = 0; j < fs->fs_frag; j++) {
if (testbmap(d + j)) {
if ((Eflag || Zflag) && start != -1) {
clear_blocks(start, d + j - 1);
start = -1;
}
continue;
}
if (start == -1)
start = d + j;
setbit(cg_blksfree(newcg), i + j);
frags++;
}
if (frags == fs->fs_frag) {
newcg->cg_cs.cs_nbfree++;
if (fs->fs_contigsumsize > 0)
setbit(cg_clustersfree(newcg),
i / fs->fs_frag);
} else if (frags > 0) {
newcg->cg_cs.cs_nffree += frags;
blk = blkmap(fs, cg_blksfree(newcg), i);
ffs_fragacct(fs, blk, newcg->cg_frsum, 1);
}
}
if ((Eflag || Zflag) && start != -1)
clear_blocks(start, d - 1);
if (fs->fs_contigsumsize > 0) {
int32_t *sump = cg_clustersum(newcg);
u_char *mapp = cg_clustersfree(newcg);
int map = *mapp++;
int bit = 1;
int run = 0;
for (i = 0; i < newcg->cg_nclusterblks; i++) {
if ((map & bit) != 0) {
run++;
} else if (run != 0) {
if (run > fs->fs_contigsumsize)
run = fs->fs_contigsumsize;
sump[run]++;
run = 0;
}
if ((i & (CHAR_BIT - 1)) != (CHAR_BIT - 1)) {
bit <<= 1;
} else {
map = *mapp++;
bit = 1;
}
}
if (run != 0) {
if (run > fs->fs_contigsumsize)
run = fs->fs_contigsumsize;
sump[run]++;
}
}
if (bkgrdflag != 0) {
cstotal.cs_nffree += cg->cg_cs.cs_nffree;
cstotal.cs_nbfree += cg->cg_cs.cs_nbfree;
cstotal.cs_nifree += cg->cg_cs.cs_nifree;
cstotal.cs_ndir += cg->cg_cs.cs_ndir;
} else {
cstotal.cs_nffree += newcg->cg_cs.cs_nffree;
cstotal.cs_nbfree += newcg->cg_cs.cs_nbfree;
cstotal.cs_nifree += newcg->cg_cs.cs_nifree;
cstotal.cs_ndir += newcg->cg_cs.cs_ndir;
}
cs = &fs->fs_cs(fs, c);
if (cursnapshot == 0 &&
memcmp(&newcg->cg_cs, cs, sizeof *cs) != 0 &&
dofix(&idesc[0], "FREE BLK COUNT(S) WRONG IN SUPERBLK")) {
memmove(cs, &newcg->cg_cs, sizeof *cs);
sbdirty();
}
if (rewritecg) {
memmove(cg, newcg, (size_t)fs->fs_cgsize);
cgdirty(cgbp);
continue;
}
if (cursnapshot == 0 &&
memcmp(newcg, cg, basesize) != 0 &&
dofix(&idesc[2], "SUMMARY INFORMATION BAD")) {
memmove(cg, newcg, (size_t)basesize);
cgdirty(cgbp);
}
if (bkgrdflag != 0 || usedsoftdep || debug)
update_maps(cg, newcg, bkgrdflag);
if (cursnapshot == 0 &&
memcmp(cg_inosused(newcg), cg_inosused(cg), mapsize) != 0 &&
dofix(&idesc[1], "BLK(S) MISSING IN BIT MAPS")) {
memmove(cg_inosused(cg), cg_inosused(newcg),
(size_t)mapsize);
cgdirty(cgbp);
}
}
if (cursnapshot == 0 &&
memcmp(&cstotal, &fs->fs_cstotal, sizeof cstotal) != 0
&& dofix(&idesc[0], "SUMMARY BLK COUNT(S) WRONG IN SUPERBLK")) {
if (debug) {
printf("cstotal is currently: %jd dirs, %jd blks free, "
"%jd frags free, %jd inos free, %jd clusters\n",
(intmax_t)fs->fs_cstotal.cs_ndir,
(intmax_t)fs->fs_cstotal.cs_nbfree,
(intmax_t)fs->fs_cstotal.cs_nffree,
(intmax_t)fs->fs_cstotal.cs_nifree,
(intmax_t)fs->fs_cstotal.cs_numclusters);
printf("cstotal ought to be: %jd dirs, %jd blks free, "
"%jd frags free, %jd inos free, %jd clusters\n",
(intmax_t)cstotal.cs_ndir,
(intmax_t)cstotal.cs_nbfree,
(intmax_t)cstotal.cs_nffree,
(intmax_t)cstotal.cs_nifree,
(intmax_t)cstotal.cs_numclusters);
}
memmove(&fs->fs_cstotal, &cstotal, sizeof cstotal);
fs->fs_ronly = 0;
fs->fs_fmod = 0;
sbdirty();
}
/*
* When doing background fsck on a snapshot, figure out whether
* the superblock summary is inaccurate and correct it when
* necessary.
*/
if (cursnapshot != 0) {
cmd.size = 1;
cmd.value = cstotal.cs_ndir - fs->fs_cstotal.cs_ndir;
if (cmd.value != 0) {
if (debug)
printf("adjndir by %+" PRIi64 "\n", cmd.value);
if (bkgrdsumadj == 0 || sysctl(adjndir, MIBSIZE, 0, 0,
&cmd, sizeof cmd) == -1)
rwerror("ADJUST NUMBER OF DIRECTORIES", cmd.value);
}
cmd.value = cstotal.cs_nbfree - fs->fs_cstotal.cs_nbfree;
if (cmd.value != 0) {
if (debug)
printf("adjnbfree by %+" PRIi64 "\n", cmd.value);
if (bkgrdsumadj == 0 || sysctl(adjnbfree, MIBSIZE, 0, 0,
&cmd, sizeof cmd) == -1)
rwerror("ADJUST NUMBER OF FREE BLOCKS", cmd.value);
}
cmd.value = cstotal.cs_nifree - fs->fs_cstotal.cs_nifree;
if (cmd.value != 0) {
if (debug)
printf("adjnifree by %+" PRIi64 "\n", cmd.value);
if (bkgrdsumadj == 0 || sysctl(adjnifree, MIBSIZE, 0, 0,
&cmd, sizeof cmd) == -1)
rwerror("ADJUST NUMBER OF FREE INODES", cmd.value);
}
cmd.value = cstotal.cs_nffree - fs->fs_cstotal.cs_nffree;
if (cmd.value != 0) {
if (debug)
printf("adjnffree by %+" PRIi64 "\n", cmd.value);
if (bkgrdsumadj == 0 || sysctl(adjnffree, MIBSIZE, 0, 0,
&cmd, sizeof cmd) == -1)
rwerror("ADJUST NUMBER OF FREE FRAGS", cmd.value);
}
cmd.value = cstotal.cs_numclusters - fs->fs_cstotal.cs_numclusters;
if (cmd.value != 0) {
if (debug)
printf("adjnumclusters by %+" PRIi64 "\n", cmd.value);
if (bkgrdsumadj == 0 || sysctl(adjnumclusters, MIBSIZE, 0, 0,
&cmd, sizeof cmd) == -1)
rwerror("ADJUST NUMBER OF FREE CLUSTERS", cmd.value);
}
}
}
/*
* Compare the original cylinder group inode and block bitmaps with the
* updated cylinder group inode and block bitmaps. Free inodes and blocks
* that have been added. Complain if any previously freed inodes blocks
* are now allocated.
*/
void
update_maps(
struct cg *oldcg, /* cylinder group of claimed allocations */
struct cg *newcg, /* cylinder group of determined allocations */
int usesysctl) /* 1 => use sysctl interface to update maps */
{
int inomapsize, excessdirs;
struct fs *fs = &sblock;
inomapsize = howmany(fs->fs_ipg, CHAR_BIT);
excessdirs = oldcg->cg_cs.cs_ndir - newcg->cg_cs.cs_ndir;
if (excessdirs < 0) {
pfatal("LOST %d DIRECTORIES\n", -excessdirs);
excessdirs = 0;
}
if (excessdirs > 0)
check_maps(cg_inosused(newcg), cg_inosused(oldcg), inomapsize,
oldcg->cg_cgx * (ufs2_daddr_t)fs->fs_ipg, "DIR", freedirs,
0, excessdirs, usesysctl);
check_maps(cg_inosused(newcg), cg_inosused(oldcg), inomapsize,
oldcg->cg_cgx * (ufs2_daddr_t)fs->fs_ipg, "FILE", freefiles,
excessdirs, fs->fs_ipg, usesysctl);
check_maps(cg_blksfree(oldcg), cg_blksfree(newcg),
howmany(fs->fs_fpg, CHAR_BIT),
oldcg->cg_cgx * (ufs2_daddr_t)fs->fs_fpg, "FRAG",
freeblks, 0, fs->fs_fpg, usesysctl);
}
static void
check_maps(
u_char *map1, /* map of claimed allocations */
u_char *map2, /* map of determined allocations */
int mapsize, /* size of above two maps */
ufs2_daddr_t startvalue, /* resource value for first element in map */
const char *name, /* name of resource found in maps */
int *opcode, /* sysctl opcode to free resource */
int skip, /* number of entries to skip before starting to free */
int limit, /* limit on number of entries to free */
int usesysctl) /* 1 => use sysctl interface to update maps */
{
# define BUFSIZE 16
char buf[BUFSIZE];
long i, j, k, l, m, size;
ufs2_daddr_t n, astart, aend, ustart, uend;
void (*msg)(const char *fmt, ...);
if (usesysctl)
msg = pfatal;
else
msg = pwarn;
astart = ustart = aend = uend = -1;
for (i = 0; i < mapsize; i++) {
j = *map1++;
k = *map2++;
if (j == k)
continue;
for (m = 0, l = 1; m < CHAR_BIT; m++, l <<= 1) {
if ((j & l) == (k & l))
continue;
n = startvalue + i * CHAR_BIT + m;
if ((j & l) != 0) {
if (astart == -1) {
astart = aend = n;
continue;
}
if (aend + 1 == n) {
aend = n;
continue;
}
if (astart == aend)
(*msg)("ALLOCATED %s %" PRId64
" MARKED FREE\n",
name, astart);
else
(*msg)("%s %sS %" PRId64 "-%" PRId64
" MARKED FREE\n",
"ALLOCATED", name, astart, aend);
astart = aend = n;
} else {
if (ustart == -1) {
ustart = uend = n;
continue;
}
if (uend + 1 == n) {
uend = n;
continue;
}
size = uend - ustart + 1;
if (size <= skip) {
skip -= size;
ustart = uend = n;
continue;
}
if (skip > 0) {
ustart += skip;
size -= skip;
skip = 0;
}
if (size > limit)
size = limit;
if (debug && size == 1)
pwarn("%s %s %" PRId64
" MARKED USED\n",
"UNALLOCATED", name, ustart);
else if (debug)
pwarn("%s %sS %" PRId64 "-%" PRId64
" MARKED USED\n",
"UNALLOCATED", name, ustart,
ustart + size - 1);
if (usesysctl != 0) {
cmd.value = ustart;
cmd.size = size;
if (sysctl(opcode, MIBSIZE, 0, 0,
&cmd, sizeof cmd) == -1) {
snprintf(buf, BUFSIZE,
"FREE %s", name);
rwerror(buf, cmd.value);
}
}
limit -= size;
if (limit <= 0)
return;
ustart = uend = n;
}
}
}
if (astart != -1) {
if (astart == aend)
(*msg)("ALLOCATED %s %" PRId64
" MARKED FREE\n", name, astart);
else
(*msg)("ALLOCATED %sS %" PRId64 "-%" PRId64
" MARKED FREE\n",
name, astart, aend);
}
if (ustart != -1) {
size = uend - ustart + 1;
if (size <= skip)
return;
if (skip > 0) {
ustart += skip;
size -= skip;
}
if (size > limit)
size = limit;
if (debug) {
if (size == 1)
pwarn("UNALLOCATED %s %" PRId64
" MARKED USED\n",
name, ustart);
else
pwarn("UNALLOCATED %sS %" PRId64 "-%" PRId64
" MARKED USED\n",
name, ustart, ustart + size - 1);
}
if (usesysctl != 0) {
cmd.value = ustart;
cmd.size = size;
if (sysctl(opcode, MIBSIZE, 0, 0, &cmd,
sizeof cmd) == -1) {
snprintf(buf, BUFSIZE, "FREE %s", name);
rwerror(buf, cmd.value);
}
}
}
}
static void
clear_blocks(ufs2_daddr_t start, ufs2_daddr_t end)
{
if (debug)
printf("Zero frags %jd to %jd\n", start, end);
if (Zflag)
blzero(fswritefd, fsbtodb(&sblock, start),
lfragtosize(&sblock, end - start + 1));
if (Eflag)
blerase(fswritefd, fsbtodb(&sblock, start),
lfragtosize(&sblock, end - start + 1));
}
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