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freebsd/sbin/fsck_ffs/pass2.c
Kirk McKusick 5cc52631b3 Rewrite the disk I/O management system in fsck_ffs(8). Other than 
making fsck_ffs(8) run faster, there should be no functional change.

The original fsck_ffs(8) had its own disk I/O management system.
When gjournal(8) was added to FreeBSD 7, code was added to fsck_ffs(8)
to do the necessary gjournal rollback. Rather than use the existing
fsck_ffs(8) disk I/O system, it wrote its own from scratch. Similarly
when journalled soft updates were added in FreeBSD 9, code was added
to fsck_ffs(8) to do the necessary journal rollback. And once again,
rather than using either of the existing fsck_ffs(8) disk I/O
systems, it wrote its own from scratch. Lastly the fsdb(8) utility
uses the fsck_ffs(8) disk I/O management system. In preparation for
making the changes necessary to enable snapshots to be taken when
using journalled soft updates, it was necessary to have a single
disk I/O system used by all the various subsystems in fsck_ffs(8).

This commit merges the functionality required by all the different
subsystems into a single disk I/O system that supports all of their
needs. In so doing it picks up optimizations from each of them
with the results that each of the subsystems does fewer reads and
writes than it did with its own customized I/O system. It also
greatly simplifies making changes to fsck_ffs(8) since everything
goes through a single place. For example the ginode() function
fetches an inode from the disk. When inode check hashes were added,
they previously had to be checked in the code implementing inode
fetch in each of the three different disk I/O systems. Now they
need only be checked in ginode().

Tested by:    Peter Holm
Sponsored by: Netflix
2021-01-07 15:03:15 -08:00

685 lines
19 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[] = "@(#)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")) {
freeino(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;
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=%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;
/*
* 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 == 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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