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freebsd-dev/sbin/fsck_ffs/pass2.c

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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.
* 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[] = "@(#)pass2.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/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <errno.h>
#include <stdint.h>
#include <string.h>
#include "fsck.h"
#define MINDIRSIZE (sizeof (struct dirtemplate))
static int fix_extraneous(struct inoinfo *, struct inodesc *);
static int deleteentry(struct inodesc *);
static int blksort(const void *, const void *);
static int pass2check(struct inodesc *);
void
pass2(void)
{
union dinode *dp;
struct inoinfo **inpp, *inp;
struct inoinfo **inpend;
struct inodesc curino;
union dinode dino;
int i;
char pathbuf[MAXPATHLEN + 1];
switch (inoinfo(ROOTINO)->ino_state) {
case USTATE:
pfatal("ROOT INODE UNALLOCATED");
if (reply("ALLOCATE") == 0) {
ckfini(0);
exit(EEXIT);
}
if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
break;
case DCLEAR:
pfatal("DUPS/BAD IN ROOT INODE");
if (reply("REALLOCATE")) {
freeino(ROOTINO);
if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
break;
}
if (reply("CONTINUE") == 0) {
ckfini(0);
exit(EEXIT);
}
break;
case FSTATE:
case FCLEAR:
case FZLINK:
pfatal("ROOT INODE NOT DIRECTORY");
if (reply("REALLOCATE")) {
freeino(ROOTINO);
if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
break;
}
if (reply("FIX") == 0) {
ckfini(0);
exit(EEXIT);
}
dp = ginode(ROOTINO);
DIP_SET(dp, di_mode, DIP(dp, di_mode) & ~IFMT);
DIP_SET(dp, di_mode, DIP(dp, di_mode) | IFDIR);
inodirty();
break;
case DSTATE:
case DZLINK:
break;
default:
errx(EEXIT, "BAD STATE %d FOR ROOT INODE",
inoinfo(ROOTINO)->ino_state);
}
inoinfo(ROOTINO)->ino_state = DFOUND;
inoinfo(WINO)->ino_state = FSTATE;
inoinfo(WINO)->ino_type = DT_WHT;
/*
* Sort the directory list into disk block order.
*/
qsort((char *)inpsort, (size_t)inplast, sizeof *inpsort, blksort);
/*
* Check the integrity of each directory.
*/
memset(&curino, 0, sizeof(struct inodesc));
curino.id_type = DATA;
curino.id_func = pass2check;
inpend = &inpsort[inplast];
for (inpp = inpsort; inpp < inpend; inpp++) {
if (got_siginfo) {
printf("%s: phase 2: dir %td of %d (%d%%)\n", cdevname,
inpp - inpsort, (int)inplast,
(int)((inpp - inpsort) * 100 / inplast));
got_siginfo = 0;
}
if (got_sigalarm) {
setproctitle("%s p2 %d%%", cdevname,
(int)((inpp - inpsort) * 100 / inplast));
got_sigalarm = 0;
}
inp = *inpp;
if (inp->i_isize == 0)
continue;
if (inp->i_isize < MINDIRSIZE) {
direrror(inp->i_number, "DIRECTORY TOO SHORT");
inp->i_isize = roundup(MINDIRSIZE, DIRBLKSIZ);
if (reply("FIX") == 1) {
dp = ginode(inp->i_number);
DIP_SET(dp, di_size, inp->i_isize);
inodirty();
}
} else if ((inp->i_isize & (DIRBLKSIZ - 1)) != 0) {
getpathname(pathbuf, inp->i_number, inp->i_number);
if (usedsoftdep)
pfatal("%s %s: LENGTH %jd NOT MULTIPLE OF %d",
"DIRECTORY", pathbuf,
(intmax_t)inp->i_isize, DIRBLKSIZ);
else
pwarn("%s %s: LENGTH %jd NOT MULTIPLE OF %d",
"DIRECTORY", pathbuf,
(intmax_t)inp->i_isize, DIRBLKSIZ);
if (preen)
printf(" (ADJUSTED)\n");
inp->i_isize = roundup(inp->i_isize, DIRBLKSIZ);
if (preen || reply("ADJUST") == 1) {
dp = ginode(inp->i_number);
DIP_SET(dp, di_size,
roundup(inp->i_isize, DIRBLKSIZ));
inodirty();
}
}
dp = &dino;
memset(dp, 0, sizeof(struct ufs2_dinode));
DIP_SET(dp, di_mode, IFDIR);
DIP_SET(dp, di_size, inp->i_isize);
for (i = 0;
i < (inp->i_numblks<NDADDR ? inp->i_numblks : NDADDR);
i++)
DIP_SET(dp, di_db[i], inp->i_blks[i]);
if (inp->i_numblks > NDADDR)
for (i = 0; i < NIADDR; i++)
DIP_SET(dp, di_ib[i], inp->i_blks[NDADDR + i]);
curino.id_number = inp->i_number;
curino.id_parent = inp->i_parent;
(void)ckinode(dp, &curino);
}
/*
* Now that the parents of all directories have been found,
* make another pass to verify the value of `..'
*/
for (inpp = inpsort; inpp < inpend; inpp++) {
inp = *inpp;
if (inp->i_parent == 0 || inp->i_isize == 0)
continue;
if (inoinfo(inp->i_parent)->ino_state == DFOUND &&
INO_IS_DUNFOUND(inp->i_number))
inoinfo(inp->i_number)->ino_state = DFOUND;
if (inp->i_dotdot == inp->i_parent ||
inp->i_dotdot == (ino_t)-1)
continue;
if (inp->i_dotdot == 0) {
inp->i_dotdot = inp->i_parent;
fileerror(inp->i_parent, inp->i_number, "MISSING '..'");
if (reply("FIX") == 0)
continue;
(void)makeentry(inp->i_number, inp->i_parent, "..");
inoinfo(inp->i_parent)->ino_linkcnt--;
continue;
}
/*
* Here we have:
* inp->i_number is directory with bad ".." in it.
* inp->i_dotdot is current value of "..".
* inp->i_parent is directory to which ".." should point.
*/
getpathname(pathbuf, inp->i_parent, inp->i_number);
printf("BAD INODE NUMBER FOR '..' in DIR I=%d (%s)\n",
inp->i_number, pathbuf);
getpathname(pathbuf, inp->i_dotdot, inp->i_dotdot);
printf("CURRENTLY POINTS TO I=%d (%s), ", inp->i_dotdot,
pathbuf);
getpathname(pathbuf, inp->i_parent, inp->i_parent);
printf("SHOULD POINT TO I=%d (%s)", inp->i_parent, pathbuf);
if (cursnapshot != 0) {
/*
* We need to:
* setcwd(inp->i_number);
* setdotdot(inp->i_dotdot, inp->i_parent);
*/
cmd.value = inp->i_number;
if (sysctlbyname("vfs.ffs.setcwd", 0, 0,
&cmd, sizeof cmd) == -1) {
/* kernel lacks support for these functions */
printf(" (IGNORED)\n");
continue;
}
cmd.value = inp->i_dotdot; /* verify same value */
cmd.size = inp->i_parent; /* new parent */
if (sysctlbyname("vfs.ffs.setdotdot", 0, 0,
&cmd, sizeof cmd) == -1) {
printf(" (FIX FAILED: %s)\n", strerror(errno));
continue;
}
printf(" (FIXED)\n");
inoinfo(inp->i_parent)->ino_linkcnt--;
inp->i_dotdot = inp->i_parent;
continue;
}
if (preen)
printf(" (FIXED)\n");
else if (reply("FIX") == 0)
continue;
inoinfo(inp->i_dotdot)->ino_linkcnt++;
inoinfo(inp->i_parent)->ino_linkcnt--;
inp->i_dotdot = inp->i_parent;
(void)changeino(inp->i_number, "..", inp->i_parent);
}
/*
* Mark all the directories that can be found from the root.
*/
propagate();
}
static int
pass2check(struct inodesc *idesc)
{
struct direct *dirp = idesc->id_dirp;
char dirname[MAXPATHLEN + 1];
struct inoinfo *inp;
int n, entrysize, ret = 0;
union dinode *dp;
const char *errmsg;
struct direct proto;
/*
* check for "."
*/
if (dirp->d_ino > maxino)
goto chk2;
if (idesc->id_entryno != 0)
goto chk1;
if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) {
if (dirp->d_ino != idesc->id_number) {
direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'");
dirp->d_ino = idesc->id_number;
if (reply("FIX") == 1)
ret |= ALTERED;
}
if (dirp->d_type != DT_DIR) {
direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'");
dirp->d_type = DT_DIR;
if (reply("FIX") == 1)
ret |= ALTERED;
}
goto chk1;
}
direrror(idesc->id_number, "MISSING '.'");
proto.d_ino = idesc->id_number;
proto.d_type = DT_DIR;
proto.d_namlen = 1;
(void)strcpy(proto.d_name, ".");
entrysize = DIRSIZ(0, &proto);
if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") != 0) {
pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n",
dirp->d_name);
} else if (dirp->d_reclen < entrysize) {
pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n");
} else if (dirp->d_reclen < 2 * entrysize) {
proto.d_reclen = dirp->d_reclen;
memmove(dirp, &proto, (size_t)entrysize);
if (reply("FIX") == 1)
ret |= ALTERED;
} else {
n = dirp->d_reclen - entrysize;
proto.d_reclen = entrysize;
memmove(dirp, &proto, (size_t)entrysize);
idesc->id_entryno++;
inoinfo(dirp->d_ino)->ino_linkcnt--;
dirp = (struct direct *)((char *)(dirp) + entrysize);
memset(dirp, 0, (size_t)n);
dirp->d_reclen = n;
if (reply("FIX") == 1)
ret |= ALTERED;
}
chk1:
if (idesc->id_entryno > 1)
goto chk2;
inp = getinoinfo(idesc->id_number);
proto.d_ino = inp->i_parent;
proto.d_type = DT_DIR;
proto.d_namlen = 2;
(void)strcpy(proto.d_name, "..");
entrysize = DIRSIZ(0, &proto);
if (idesc->id_entryno == 0) {
n = DIRSIZ(0, dirp);
if (dirp->d_reclen < n + entrysize)
goto chk2;
proto.d_reclen = dirp->d_reclen - n;
dirp->d_reclen = n;
idesc->id_entryno++;
inoinfo(dirp->d_ino)->ino_linkcnt--;
dirp = (struct direct *)((char *)(dirp) + n);
memset(dirp, 0, (size_t)proto.d_reclen);
dirp->d_reclen = proto.d_reclen;
}
if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) {
inp->i_dotdot = dirp->d_ino;
if (dirp->d_type != DT_DIR) {
direrror(idesc->id_number, "BAD TYPE VALUE FOR '..'");
dirp->d_type = DT_DIR;
if (reply("FIX") == 1)
ret |= ALTERED;
}
goto chk2;
}
if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") != 0) {
fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n",
dirp->d_name);
inp->i_dotdot = (ino_t)-1;
} else if (dirp->d_reclen < entrysize) {
fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n");
inp->i_dotdot = (ino_t)-1;
} else if (inp->i_parent != 0) {
/*
* We know the parent, so fix now.
*/
inp->i_dotdot = inp->i_parent;
fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
proto.d_reclen = dirp->d_reclen;
memmove(dirp, &proto, (size_t)entrysize);
if (reply("FIX") == 1)
ret |= ALTERED;
}
idesc->id_entryno++;
if (dirp->d_ino != 0)
inoinfo(dirp->d_ino)->ino_linkcnt--;
return (ret|KEEPON);
chk2:
if (dirp->d_ino == 0)
return (ret|KEEPON);
if (dirp->d_namlen <= 2 &&
dirp->d_name[0] == '.' &&
idesc->id_entryno >= 2) {
if (dirp->d_namlen == 1) {
direrror(idesc->id_number, "EXTRA '.' ENTRY");
dirp->d_ino = 0;
if (reply("FIX") == 1)
ret |= ALTERED;
return (KEEPON | ret);
}
if (dirp->d_name[1] == '.') {
direrror(idesc->id_number, "EXTRA '..' ENTRY");
dirp->d_ino = 0;
if (reply("FIX") == 1)
ret |= ALTERED;
return (KEEPON | ret);
}
}
idesc->id_entryno++;
n = 0;
if (dirp->d_ino > maxino) {
fileerror(idesc->id_number, dirp->d_ino, "I OUT OF RANGE");
n = reply("REMOVE");
} else if (((dirp->d_ino == WINO && dirp->d_type != DT_WHT) ||
(dirp->d_ino != WINO && dirp->d_type == DT_WHT))) {
fileerror(idesc->id_number, dirp->d_ino, "BAD WHITEOUT ENTRY");
dirp->d_ino = WINO;
dirp->d_type = DT_WHT;
if (reply("FIX") == 1)
ret |= ALTERED;
} else {
again:
switch (inoinfo(dirp->d_ino)->ino_state) {
case USTATE:
if (idesc->id_entryno <= 2)
break;
fileerror(idesc->id_number, dirp->d_ino, "UNALLOCATED");
n = reply("REMOVE");
break;
case DCLEAR:
case FCLEAR:
if (idesc->id_entryno <= 2)
break;
if (inoinfo(dirp->d_ino)->ino_state == FCLEAR)
errmsg = "DUP/BAD";
else if (!preen && !usedsoftdep)
errmsg = "ZERO LENGTH DIRECTORY";
else if (cursnapshot == 0) {
n = 1;
break;
} else {
getpathname(dirname, idesc->id_number,
dirp->d_ino);
pwarn("ZERO LENGTH DIRECTORY %s I=%d",
dirname, dirp->d_ino);
/*
* We need to:
* setcwd(idesc->id_parent);
* rmdir(dirp->d_name);
*/
cmd.value = idesc->id_number;
if (sysctlbyname("vfs.ffs.setcwd", 0, 0,
&cmd, sizeof cmd) == -1) {
/* kernel lacks support */
printf(" (IGNORED)\n");
n = 1;
break;
}
if (rmdir(dirp->d_name) == -1) {
printf(" (REMOVAL FAILED: %s)\n",
strerror(errno));
n = 1;
break;
}
/* ".." reference to parent is removed */
inoinfo(idesc->id_number)->ino_linkcnt--;
printf(" (REMOVED)\n");
break;
}
fileerror(idesc->id_number, dirp->d_ino, errmsg);
if ((n = reply("REMOVE")) == 1)
break;
dp = ginode(dirp->d_ino);
inoinfo(dirp->d_ino)->ino_state =
(DIP(dp, di_mode) & IFMT) == IFDIR ? DSTATE : FSTATE;
inoinfo(dirp->d_ino)->ino_linkcnt = DIP(dp, di_nlink);
goto again;
case DSTATE:
case DZLINK:
if (inoinfo(idesc->id_number)->ino_state == DFOUND)
inoinfo(dirp->d_ino)->ino_state = DFOUND;
/* FALLTHROUGH */
case DFOUND:
inp = getinoinfo(dirp->d_ino);
if (idesc->id_entryno > 2) {
if (inp->i_parent == 0)
inp->i_parent = idesc->id_number;
else if ((n = fix_extraneous(inp, idesc)) == 1)
break;
}
/* FALLTHROUGH */
case FSTATE:
case FZLINK:
if (dirp->d_type != inoinfo(dirp->d_ino)->ino_type) {
fileerror(idesc->id_number, dirp->d_ino,
"BAD TYPE VALUE");
dirp->d_type = inoinfo(dirp->d_ino)->ino_type;
if (reply("FIX") == 1)
ret |= ALTERED;
}
inoinfo(dirp->d_ino)->ino_linkcnt--;
break;
default:
errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
inoinfo(dirp->d_ino)->ino_state, dirp->d_ino);
}
}
if (n == 0)
return (ret|KEEPON);
dirp->d_ino = 0;
return (ret|KEEPON|ALTERED);
}
static int
fix_extraneous(struct inoinfo *inp, struct inodesc *idesc)
{
char *cp;
struct inodesc dotdesc;
char oldname[MAXPATHLEN + 1];
char newname[MAXPATHLEN + 1];
/*
* If we have not yet found "..", look it up now so we know
* which inode the directory itself believes is its parent.
*/
if (inp->i_dotdot == 0) {
memset(&dotdesc, 0, sizeof(struct inodesc));
dotdesc.id_type = DATA;
dotdesc.id_number = idesc->id_dirp->d_ino;
dotdesc.id_func = findino;
dotdesc.id_name = strdup("..");
if ((ckinode(ginode(dotdesc.id_number), &dotdesc) & FOUND))
inp->i_dotdot = dotdesc.id_parent;
}
/*
* We have the previously found old name (inp->i_parent) and the
* just found new name (idesc->id_number). We have five cases:
* 1) ".." is missing - can remove either name, choose to delete
* new one and let fsck create ".." pointing to old name.
* 2) Both new and old are in same directory, choose to delete
* the new name and let fsck fix ".." if it is wrong.
* 3) ".." does not point to the new name, so delete it and let
* fsck fix ".." to point to the old one if it is wrong.
* 4) ".." points to the old name only, so delete the new one.
* 5) ".." points to the new name only, so delete the old one.
*
* For cases 1-4 we eliminate the new name;
* for case 5 we eliminate the old name.
*/
if (inp->i_dotdot == 0 || /* Case 1 */
idesc->id_number == inp->i_parent || /* Case 2 */
inp->i_dotdot != idesc->id_number || /* Case 3 */
inp->i_dotdot == inp->i_parent) { /* Case 4 */
getpathname(newname, idesc->id_number, idesc->id_number);
if (strcmp(newname, "/") != 0)
strcat (newname, "/");
strcat(newname, idesc->id_dirp->d_name);
getpathname(oldname, inp->i_number, inp->i_number);
pwarn("%s IS AN EXTRANEOUS HARD LINK TO DIRECTORY %s",
newname, oldname);
if (cursnapshot != 0) {
/*
* We need to
* setcwd(idesc->id_number);
* unlink(idesc->id_dirp->d_name);
*/
cmd.value = idesc->id_number;
if (sysctlbyname("vfs.ffs.setcwd", 0, 0,
&cmd, sizeof cmd) == -1) {
printf(" (IGNORED)\n");
return (0);
}
cmd.value = (intptr_t)idesc->id_dirp->d_name;
cmd.size = inp->i_number; /* verify same name */
if (sysctlbyname("vfs.ffs.unlink", 0, 0,
&cmd, sizeof cmd) == -1) {
printf(" (UNLINK FAILED: %s)\n",
strerror(errno));
return (0);
}
printf(" (REMOVED)\n");
return (0);
}
if (preen) {
printf(" (REMOVED)\n");
return (1);
}
return (reply("REMOVE"));
}
/*
* None of the first four cases above, so must be case (5).
* Eliminate the old name and make the new the name the parent.
*/
getpathname(oldname, inp->i_parent, inp->i_number);
getpathname(newname, inp->i_number, inp->i_number);
pwarn("%s IS AN EXTRANEOUS HARD LINK TO DIRECTORY %s", oldname,
newname);
if (cursnapshot != 0) {
/*
* We need to
* setcwd(inp->i_parent);
* unlink(last component of oldname pathname);
*/
cmd.value = inp->i_parent;
if (sysctlbyname("vfs.ffs.setcwd", 0, 0,
&cmd, sizeof cmd) == -1) {
printf(" (IGNORED)\n");
return (0);
}
if ((cp = rindex(oldname, '/')) == NULL) {
printf(" (IGNORED)\n");
return (0);
}
cmd.value = (intptr_t)(cp + 1);
cmd.size = inp->i_number; /* verify same name */
if (sysctlbyname("vfs.ffs.unlink", 0, 0,
&cmd, sizeof cmd) == -1) {
printf(" (UNLINK FAILED: %s)\n",
strerror(errno));
return (0);
}
printf(" (REMOVED)\n");
inp->i_parent = idesc->id_number; /* reparent to correct dir */
return (0);
}
if (!preen && !reply("REMOVE"))
return (0);
memset(&dotdesc, 0, sizeof(struct inodesc));
dotdesc.id_type = DATA;
dotdesc.id_number = inp->i_parent; /* directory in which name appears */
dotdesc.id_parent = inp->i_number; /* inode number in entry to delete */
dotdesc.id_func = deleteentry;
if ((ckinode(ginode(dotdesc.id_number), &dotdesc) & FOUND) && preen)
printf(" (REMOVED)\n");
inp->i_parent = idesc->id_number; /* reparent to correct directory */
inoinfo(inp->i_number)->ino_linkcnt++; /* name gone, return reference */
return (0);
}
static int
deleteentry(struct inodesc *idesc)
{
struct direct *dirp = idesc->id_dirp;
if (idesc->id_entryno++ < 2 || dirp->d_ino != idesc->id_parent)
return (KEEPON);
dirp->d_ino = 0;
return (ALTERED|STOP|FOUND);
}
/*
* Routine to sort disk blocks.
*/
static int
blksort(const void *arg1, const void *arg2)
{
return ((*(struct inoinfo * const *)arg1)->i_blks[0] -
(*(struct inoinfo * const *)arg2)->i_blks[0]);
}
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