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freebsd-dev/sbin/fsck_ffs/pass2.c
Kirk McKusick 52f9710412 Correct several bugs in fsck_ffs(8) triggered by corrupted filesystems. 
If a directory entry has an illegal inode number (less than zero
or greater than the last inode in the filesystem) the entry is removed.
If a directory '.' or '..' entry had an illegal inode number they
were being removed. Since fsck_ffs knows what the correct value is
for these two entries fix them rather deleting them.

Add much more extensive cylinder group checks and use them to be
more careful about rebuilding a cylinder group.

Check for out-of-range block numbers before trying to free them.

When a directory is deleted also remove its cache entry created
in pass1 so that later passes do not try to operate on a deleted
directory.

Check for ctime(3) returning NULL before trying to use its return.

When freeing a  directory inode, do not try to interpret it as a
directory.

Reserve space in the inostatlist to have room to allocate a
lost+found directory.

If an invalid block number is found past the end of an inode simply
remove it rather than clearing and removing the inode.

Modernize the inoinfo structure to use queue(3) LIST rather than a
handrolled linked list implementation.

Reported by:  Bob Prohaska, John-Mark Gurney, and Mark Millard
Tested by:    Peter Holm
Reviewed by:  Peter Holm
MFC after:    2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D38668
2023-03-07 15:14:47 -08:00

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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[] = "@(#)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)
{
struct inode ip;
union dinode *dp;
struct inoinfo **inpp, *inp;
struct inoinfo **inpend;
struct inodesc curino;
union dinode dino;
int i;
char pathbuf[MAXPATHLEN + 1];
switch (inoinfo(UFS_ROOTINO)->ino_state) {
case USTATE:
pfatal("ROOT INODE UNALLOCATED");
if (reply("ALLOCATE") == 0) {
ckfini(0);
exit(EEXIT);
}
if (allocdir(UFS_ROOTINO, UFS_ROOTINO, 0755) != UFS_ROOTINO)
errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
break;
case DCLEAR:
pfatal("DUPS/BAD IN ROOT INODE");
if (reply("REALLOCATE")) {
freedirino(UFS_ROOTINO, UFS_ROOTINO);
if (allocdir(UFS_ROOTINO, UFS_ROOTINO, 0755) !=
UFS_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(UFS_ROOTINO);
if (allocdir(UFS_ROOTINO, UFS_ROOTINO, 0755) !=
UFS_ROOTINO)
errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
break;
}
if (reply("FIX") == 0) {
ckfini(0);
exit(EEXIT);
}
ginode(UFS_ROOTINO, &ip);
dp = ip.i_dp;
DIP_SET(dp, di_mode, DIP(dp, di_mode) & ~IFMT);
DIP_SET(dp, di_mode, DIP(dp, di_mode) | IFDIR);
inodirty(&ip);
irelse(&ip);
break;
case DSTATE:
case DZLINK:
break;
default:
errx(EEXIT, "BAD STATE %d FOR ROOT INODE",
inoinfo(UFS_ROOTINO)->ino_state);
}
inoinfo(UFS_ROOTINO)->ino_state = DFOUND;
inoinfo(UFS_WINO)->ino_state = FSTATE;
inoinfo(UFS_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) {
ginode(inp->i_number, &ip);
DIP_SET(ip.i_dp, di_size, inp->i_isize);
inodirty(&ip);
irelse(&ip);
}
} 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) {
ginode(inp->i_number, &ip);
DIP_SET(ip.i_dp, di_size,
roundup(inp->i_isize, DIRBLKSIZ));
inodirty(&ip);
irelse(&ip);
}
}
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 < MIN(inp->i_numblks, UFS_NDADDR); i++)
DIP_SET(dp, di_db[i], inp->i_blks[i]);
if (inp->i_numblks > UFS_NDADDR)
for (i = 0; i < UFS_NIADDR; i++)
DIP_SET(dp, di_ib[i],
inp->i_blks[UFS_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;
if (debug)
fileerror(inp->i_parent, inp->i_number,
"DEFERRED MISSING '..' FIX");
(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=%ju (%s)\n",
(uintmax_t)inp->i_number, pathbuf);
getpathname(pathbuf, inp->i_dotdot, inp->i_dotdot);
printf("CURRENTLY POINTS TO I=%ju (%s), ",
(uintmax_t)inp->i_dotdot, pathbuf);
getpathname(pathbuf, inp->i_parent, inp->i_parent);
printf("SHOULD POINT TO I=%ju (%s)",
(uintmax_t)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;
struct inode ip;
union dinode *dp;
const char *errmsg;
struct direct proto, *newdirp;
/*
* check for "."
*/
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 '.'");
if (reply("FIX") == 1) {
dirp->d_ino = idesc->id_number;
ret |= ALTERED;
}
}
if (dirp->d_type != DT_DIR) {
direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'");
if (reply("FIX") == 1) {
dirp->d_type = DT_DIR;
ret |= ALTERED;
}
}
goto chk1;
}
proto.d_ino = idesc->id_number;
proto.d_type = DT_DIR;
proto.d_namlen = 1;
(void)strcpy(proto.d_name, ".");
entrysize = DIRSIZ(0, &proto);
direrror(idesc->id_number, "MISSING '.'");
errmsg = "ADD '.' ENTRY";
if (dirp->d_reclen < entrysize + DIRSIZ(0, dirp)) {
/* Not enough space to add '.', replace first entry with '.' */
if (dirp->d_ino != 0) {
pwarn("\nFIRST ENTRY IN DIRECTORY CONTAINS %s\n",
dirp->d_name);
errmsg = "REPLACE WITH '.'";
}
if (reply(errmsg) == 0)
goto chk1;
proto.d_reclen = dirp->d_reclen;
memmove(dirp, &proto, (size_t)entrysize);
ret |= ALTERED;
} else {
/* Move over first entry and add '.' entry */
if (reply(errmsg) == 0)
goto chk1;
newdirp = (struct direct *)((char *)(dirp) + entrysize);
dirp->d_reclen -= entrysize;
memmove(newdirp, dirp, dirp->d_reclen);
proto.d_reclen = entrysize;
memmove(dirp, &proto, (size_t)entrysize);
idesc->id_entryno++;
inoinfo(idesc->id_number)->ino_linkcnt--;
dirp = newdirp;
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) {
if (dirp->d_ino > maxino) {
direrror(idesc->id_number, "BAD INODE NUMBER FOR '..'");
/*
* If we know parent set it now, otherwise let it
* point to the root inode and it will get cleaned
* up later if that is not correct.
*/
if (inp->i_parent != 0)
dirp->d_ino = inp->i_parent;
else
dirp->d_ino = UFS_ROOTINO;
if (reply("FIX") == 1)
ret |= ALTERED;
}
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;
}
fileerror(inp->i_parent != 0 ? inp->i_parent : idesc->id_number,
idesc->id_number, "MISSING '..'");
errmsg = "ADD '..' ENTRY";
if (dirp->d_reclen < entrysize + DIRSIZ(0, dirp)) {
/* No space to add '..', replace second entry with '..' */
if (dirp->d_ino != 0) {
pfatal("SECOND ENTRY IN DIRECTORY CONTAINS %s\n",
dirp->d_name);
errmsg = "REPLACE WITH '..'";
}
if (reply(errmsg) == 0) {
inp->i_dotdot = (ino_t)-1;
goto chk2;
}
if (proto.d_ino == 0) {
/* Defer processing until parent known */
idesc->id_entryno++;
if (debug)
printf("(FIX DEFERRED)\n");
}
inp->i_dotdot = proto.d_ino;
proto.d_reclen = dirp->d_reclen;
memmove(dirp, &proto, (size_t)entrysize);
ret |= ALTERED;
} else {
/* Move over second entry and add '..' entry */
if (reply(errmsg) == 0) {
inp->i_dotdot = (ino_t)-1;
goto chk2;
}
if (proto.d_ino == 0) {
/* Defer processing until parent known */
idesc->id_entryno++;
if (debug)
printf("(FIX DEFERRED)\n");
}
inp->i_dotdot = proto.d_ino;
if (dirp->d_ino == 0) {
proto.d_reclen = dirp->d_reclen;
memmove(dirp, &proto, (size_t)entrysize);
} else {
newdirp = (struct direct *)((char *)(dirp) + entrysize);
dirp->d_reclen -= entrysize;
memmove(newdirp, dirp, dirp->d_reclen);
proto.d_reclen = entrysize;
memmove(dirp, &proto, (size_t)entrysize);
if (dirp->d_ino != 0) {
idesc->id_entryno++;
inoinfo(dirp->d_ino)->ino_linkcnt--;
}
dirp = newdirp;
}
ret |= ALTERED;
}
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 == UFS_WINO && dirp->d_type != DT_WHT) ||
(dirp->d_ino != UFS_WINO && dirp->d_type == DT_WHT))) {
fileerror(idesc->id_number, dirp->d_ino, "BAD WHITEOUT ENTRY");
dirp->d_ino = UFS_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=%ju",
dirname, (uintmax_t)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;
ginode(dirp->d_ino, &ip);
dp = ip.i_dp;
inoinfo(dirp->d_ino)->ino_state =
(DIP(dp, di_mode) & IFMT) == IFDIR ? DSTATE : FSTATE;
inoinfo(dirp->d_ino)->ino_linkcnt = DIP(dp, di_nlink);
irelse(&ip);
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=%ju",
inoinfo(dirp->d_ino)->ino_state,
(uintmax_t)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 inode ip;
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("..");
ginode(dotdesc.id_number, &ip);
if ((ckinode(ip.i_dp, &dotdesc) & FOUND))
inp->i_dotdot = dotdesc.id_parent;
irelse(&ip);
}
/*
* 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 = strchr(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;
ginode(dotdesc.id_number, &ip);
if ((ckinode(ip.i_dp, &dotdesc) & FOUND) && preen)
printf(" (REMOVED)\n");
irelse(&ip);
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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