mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-15 10:17:20 +00:00
401475f50c
r356313 broke handling of dirty file system because we have restricted the correction of "odd" byte sequences to checkfat(), and as a result the dirty bit is never cleared. The old fsck_msdosfs code would write FAT twice to fix the dirty bit, which is also not ideal. Fix this by introducing a new rountine, cleardirty() which will perform the set of clean bit only, and use it in checkfilesys() if we thought the file system was dirty. Reviewed by: cem, emaste MFC after: 3 day Differential Revision: https://reviews.freebsd.org/D24581
155 lines
4.4 KiB
C
155 lines
4.4 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
|
|
* Copyright (c) 1995 Martin Husemann
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
|
|
* $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef EXT_H
|
|
#define EXT_H
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stdbool.h>
|
|
|
|
#include "dosfs.h"
|
|
|
|
#define LOSTDIR "LOST.DIR"
|
|
|
|
/*
|
|
* Options:
|
|
*/
|
|
extern int alwaysno; /* assume "no" for all questions */
|
|
extern int alwaysyes; /* assume "yes" for all questions */
|
|
extern int preen; /* we are preening */
|
|
extern int rdonly; /* device is opened read only (supersedes above) */
|
|
extern int skipclean; /* skip clean file systems if preening */
|
|
extern int allow_mmap; /* allow the use of mmap() */
|
|
|
|
/*
|
|
* function declarations
|
|
*/
|
|
int ask(int, const char *, ...) __printflike(2, 3);
|
|
|
|
/*
|
|
* Check the dirty flag. If the file system is clean, then return 1.
|
|
* Otherwise, return 0 (this includes the case of FAT12 file systems --
|
|
* they have no dirty flag, so they must be assumed to be unclean).
|
|
*/
|
|
int checkdirty(int, struct bootblock *);
|
|
|
|
/*
|
|
* Check file system given as arg
|
|
*/
|
|
int checkfilesys(const char *);
|
|
|
|
/*
|
|
* Return values of various functions
|
|
*/
|
|
#define FSOK 0 /* Check was OK */
|
|
#define FSBOOTMOD 1 /* Boot block was modified */
|
|
#define FSDIRMOD 2 /* Some directory was modified */
|
|
#define FSFATMOD 4 /* The FAT was modified */
|
|
#define FSERROR 8 /* Some unrecovered error remains */
|
|
#define FSFATAL 16 /* Some unrecoverable error occurred */
|
|
#define FSDIRTY 32 /* File system is dirty */
|
|
|
|
/*
|
|
* read a boot block in a machine independent fashion and translate
|
|
* it into our struct bootblock.
|
|
*/
|
|
int readboot(int, struct bootblock *);
|
|
|
|
/*
|
|
* Correct the FSInfo block.
|
|
*/
|
|
int writefsinfo(int, struct bootblock *);
|
|
|
|
/* Opaque type */
|
|
struct fat_descriptor;
|
|
|
|
int cleardirty(struct fat_descriptor *);
|
|
|
|
void fat_clear_cl_head(struct fat_descriptor *, cl_t);
|
|
bool fat_is_cl_head(struct fat_descriptor *, cl_t);
|
|
|
|
cl_t fat_get_cl_next(struct fat_descriptor *, cl_t);
|
|
|
|
int fat_set_cl_next(struct fat_descriptor *, cl_t, cl_t);
|
|
|
|
cl_t fat_allocate_cluster(struct fat_descriptor *fat);
|
|
|
|
struct bootblock* fat_get_boot(struct fat_descriptor *);
|
|
int fat_get_fd(struct fat_descriptor *);
|
|
bool fat_is_valid_cl(struct fat_descriptor *, cl_t);
|
|
|
|
/*
|
|
* Read the FAT 0 and return a pointer to the newly allocated
|
|
* descriptor of it.
|
|
*/
|
|
int readfat(int, struct bootblock *, struct fat_descriptor **);
|
|
|
|
/*
|
|
* Write back FAT entries
|
|
*/
|
|
int writefat(struct fat_descriptor *);
|
|
|
|
/*
|
|
* Read a directory
|
|
*/
|
|
int resetDosDirSection(struct fat_descriptor *);
|
|
void finishDosDirSection(void);
|
|
int handleDirTree(struct fat_descriptor *);
|
|
|
|
/*
|
|
* Cross-check routines run after everything is completely in memory
|
|
*/
|
|
int checkchain(struct fat_descriptor *, cl_t, size_t *);
|
|
|
|
/*
|
|
* Check for lost cluster chains
|
|
*/
|
|
int checklost(struct fat_descriptor *);
|
|
/*
|
|
* Try to reconnect a lost cluster chain
|
|
*/
|
|
int reconnect(struct fat_descriptor *, cl_t, size_t);
|
|
void finishlf(void);
|
|
|
|
/*
|
|
* Small helper functions
|
|
*/
|
|
/*
|
|
* Return the type of a reserved cluster as text
|
|
*/
|
|
const char *rsrvdcltype(cl_t);
|
|
|
|
/*
|
|
* Clear a cluster chain in a FAT
|
|
*/
|
|
void clearchain(struct fat_descriptor *, cl_t);
|
|
|
|
#endif
|