NetBSD/sbin/fsck_ext2fs/main.c

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Apply the NFS exports list rototill patch: - Remove all NFS related stuff from file system specific code. - Drop the vfs_checkexp hook and generalize it in the new nfs_check_export function, thus removing redundancy from all file systems. - Move all NFS export-related stuff from kern/vfs_subr.c to the new file sys/nfs/nfs_export.c. The former was becoming large and its code is always compiled, regardless of the build options. Using the latter, the code is only compiled in when NFSSERVER is enabled. While doing this, also make some functions in nfs_subs.c conditional to NFSSERVER. - Add a new command in nfssvc(2), called NFSSVC_SETEXPORTSLIST, that takes a path and a set of export entries. At the moment it can only clear the exports list or append entries, one by one, but it is done in a way that allows setting the whole set of entries atomically in the future (see the comment in mountd_set_exports_list or in doc/TODO). - Change mountd(8) to use the nfssvc(2) system call instead of mount(2) so that it becomes file system agnostic. In fact, all this whole thing was done to remove a 'XXX' block from this utility! - Change the mount*, newfs and fsck* userland utilities to not deal with NFS exports initialization; done internally by the kernel when initializing the NFS support for each file system. - Implement an interface for VFS (called VFS hooks) so that several kernel subsystems can run arbitrary code upon receipt of specific VFS events. At the moment, this only provides support for unmount and is used to destroy NFS exports lists from the file systems being unmounted, though it has room for extension. Thanks go to yamt@, chs@, thorpej@, wrstuden@ and others for their comments and advice in the development of this patch.
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/* $NetBSD: main.c,v 1.23 2005/09/23 12:10:34 jmmv Exp $ */
/*
* 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.
*/
/*
* Copyright (c) 1997 Manuel Bouyer.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/23/94";
#else
Apply the NFS exports list rototill patch: - Remove all NFS related stuff from file system specific code. - Drop the vfs_checkexp hook and generalize it in the new nfs_check_export function, thus removing redundancy from all file systems. - Move all NFS export-related stuff from kern/vfs_subr.c to the new file sys/nfs/nfs_export.c. The former was becoming large and its code is always compiled, regardless of the build options. Using the latter, the code is only compiled in when NFSSERVER is enabled. While doing this, also make some functions in nfs_subs.c conditional to NFSSERVER. - Add a new command in nfssvc(2), called NFSSVC_SETEXPORTSLIST, that takes a path and a set of export entries. At the moment it can only clear the exports list or append entries, one by one, but it is done in a way that allows setting the whole set of entries atomically in the future (see the comment in mountd_set_exports_list or in doc/TODO). - Change mountd(8) to use the nfssvc(2) system call instead of mount(2) so that it becomes file system agnostic. In fact, all this whole thing was done to remove a 'XXX' block from this utility! - Change the mount*, newfs and fsck* userland utilities to not deal with NFS exports initialization; done internally by the kernel when initializing the NFS support for each file system. - Implement an interface for VFS (called VFS hooks) so that several kernel subsystems can run arbitrary code upon receipt of specific VFS events. At the moment, this only provides support for unmount and is used to destroy NFS exports lists from the file systems being unmounted, though it has room for extension. Thanks go to yamt@, chs@, thorpej@, wrstuden@ and others for their comments and advice in the development of this patch.
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__RCSID("$NetBSD: main.c,v 1.23 2005/09/23 12:10:34 jmmv Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/mount.h>
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#include <ufs/ufs/ufsmount.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
#include <ufs/ext2fs/ext2fs.h>
#include <fstab.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
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#include <time.h>
#include <unistd.h>
#include "fsck.h"
#include "extern.h"
#include "fsutil.h"
int returntosingle;
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static int argtoi(int, const char *, const char *, int);
static int checkfilesys(const char *, char *, long, int);
static void usage(void);
int
main(int argc, char *argv[])
{
int ch;
int ret = 0;
sync();
skipclean = 1;
while ((ch = getopt(argc, argv, "b:dfm:npqy")) != -1) {
switch (ch) {
case 'b':
skipclean = 0;
bflag = argtoi('b', "number", optarg, 10);
printf("Alternate super block location: %d\n", bflag);
break;
case 'd':
debug++;
break;
case 'f':
skipclean = 0;
break;
case 'm':
lfmode = argtoi('m', "mode", optarg, 8);
if (lfmode &~ 07777)
errexit("bad mode to -m: %o\n", lfmode);
printf("** lost+found creation mode %o\n", lfmode);
break;
case 'n':
nflag++;
yflag = 0;
break;
case 'p':
preen++;
break;
case 'P':
/* Progress meter not implemented. */
break;
case 'q': /* Quiet not implemented */
break;
case 'y':
yflag++;
nflag = 0;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!argc)
usage();
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
(void)signal(SIGINT, catch);
if (preen)
(void)signal(SIGQUIT, catchquit);
while (argc-- > 0)
(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
if (returntosingle)
ret = 2;
exit(ret);
}
static int
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argtoi(int flag, const char *req, const char *str, int base)
{
char *cp;
int ret;
ret = (int)strtol(str, &cp, base);
if (cp == str || *cp)
errexit("-%c flag requires a %s\n", flag, req);
return (ret);
}
/*
* Check the specified filesystem.
*/
/* ARGSUSED */
static int
checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
{
daddr_t n_bfree;
struct dups *dp;
struct zlncnt *zlnp;
int i;
if (preen && child)
(void)signal(SIGQUIT, voidquit);
setcdevname(filesys, preen);
if (debug && preen)
pwarn("starting\n");
switch (setup(filesys)) {
case 0:
if (preen)
pfatal("CAN'T CHECK FILE SYSTEM.");
case -1:
return (0);
}
/*
* 1: scan inodes tallying blocks used
*/
if (preen == 0) {
if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
printf("** Last Mounted on %s\n",
sblock.e2fs.e2fs_fsmnt);
}
if (hotroot())
printf("** Root file system\n");
printf("** Phase 1 - Check Blocks and Sizes\n");
}
pass1();
/*
* 1b: locate first references to duplicates, if any
*/
if (duplist) {
if (preen)
pfatal("INTERNAL ERROR: dups with -p");
printf("** Phase 1b - Rescan For More DUPS\n");
pass1b();
}
/*
* 2: traverse directories from root to mark all connected directories
*/
if (preen == 0)
printf("** Phase 2 - Check Pathnames\n");
pass2();
/*
* 3: scan inodes looking for disconnected directories
*/
if (preen == 0)
printf("** Phase 3 - Check Connectivity\n");
pass3();
/*
* 4: scan inodes looking for disconnected files; check reference counts
*/
if (preen == 0)
printf("** Phase 4 - Check Reference Counts\n");
pass4();
/*
* 5: check and repair resource counts in cylinder groups
*/
if (preen == 0)
printf("** Phase 5 - Check Cyl groups\n");
pass5();
/*
* print out summary statistics
*/
n_bfree = sblock.e2fs.e2fs_fbcount;
pwarn("%lld files, %lld used, %lld free\n",
(long long)n_files, (long long)n_blks, (long long)n_bfree);
if (debug &&
/* 9 reserved and unused inodes in FS */
(n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
printf("%lld files missing\n", (long long)n_files);
if (debug) {
for (i = 0; i < sblock.e2fs_ncg; i++)
n_blks += cgoverhead(i);
n_blks += sblock.e2fs.e2fs_first_dblock;
if (n_blks -= maxfsblock - n_bfree)
printf("%lld blocks missing\n", (long long)n_blks);
if (duplist != NULL) {
printf("The following duplicate blocks remain:");
for (dp = duplist; dp; dp = dp->next)
printf(" %lld,", (long long)dp->dup);
printf("\n");
}
if (zlnhead != NULL) {
printf("The following zero link count inodes remain:");
for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
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printf(" %llu,",
(unsigned long long)zlnp->zlncnt);
printf("\n");
}
}
zlnhead = (struct zlncnt *)0;
duplist = (struct dups *)0;
muldup = (struct dups *)0;
inocleanup();
if (fsmodified) {
time_t t;
(void)time(&t);
sblock.e2fs.e2fs_wtime = t;
sblock.e2fs.e2fs_lastfsck = t;
sbdirty();
}
ckfini(1);
free(blockmap);
free(statemap);
free((char *)lncntp);
if (!fsmodified)
return (0);
if (!preen)
printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
if (rerun)
printf("\n***** PLEASE RERUN FSCK *****\n");
if (hotroot()) {
struct statvfs stfs_buf;
/*
* We modified the root. Do a mount update on
* it, unless it is read-write, so we can continue.
*/
if (statvfs("/", &stfs_buf) == 0) {
long flags = stfs_buf.f_flag;
struct ufs_args args;
int ret;
if (flags & MNT_RDONLY) {
args.fspec = 0;
flags |= MNT_UPDATE | MNT_RELOAD;
ret = mount(MOUNT_EXT2FS, "/", flags, &args);
if (ret == 0)
return(0);
}
}
if (!preen)
printf("\n***** REBOOT NOW *****\n");
sync();
return (4);
}
return (0);
}
static void
usage(void)
{
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(void) fprintf(stderr,
"usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
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getprogname());
exit(1);
}