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
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
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* Copyright (c) 1995 Martin Husemann
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $
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* $FreeBSD$
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*/
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#ifndef EXT_H
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#define EXT_H
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#include <sys/types.h>
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#include <stdbool.h>
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#include "dosfs.h"
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#define LOSTDIR "LOST.DIR"
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/*
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* Options:
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*/
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extern int alwaysno; /* assume "no" for all questions */
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extern int alwaysyes; /* assume "yes" for all questions */
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extern int preen; /* we are preening */
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extern int rdonly; /* device is opened read only (supersedes above) */
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extern int skipclean; /* skip clean file systems if preening */
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extern int allow_mmap; /* allow the use of mmap() */
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/*
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* function declarations
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*/
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int ask(int, const char *, ...) __printflike(2, 3);
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/*
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* Check the dirty flag. If the file system is clean, then return 1.
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* Otherwise, return 0 (this includes the case of FAT12 file systems --
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* they have no dirty flag, so they must be assumed to be unclean).
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*/
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int checkdirty(int, struct bootblock *);
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/*
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* Check file system given as arg
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*/
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int checkfilesys(const char *);
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/*
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* Return values of various functions
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*/
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#define FSOK 0 /* Check was OK */
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#define FSBOOTMOD 1 /* Boot block was modified */
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#define FSDIRMOD 2 /* Some directory was modified */
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#define FSFATMOD 4 /* The FAT was modified */
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#define FSERROR 8 /* Some unrecovered error remains */
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#define FSFATAL 16 /* Some unrecoverable error occurred */
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#define FSDIRTY 32 /* File system is dirty */
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/*
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* read a boot block in a machine independent fashion and translate
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* it into our struct bootblock.
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*/
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int readboot(int, struct bootblock *);
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/*
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* Correct the FSInfo block.
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*/
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int writefsinfo(int, struct bootblock *);
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/* Opaque type */
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struct fat_descriptor;
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int cleardirty(struct fat_descriptor *);
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void fat_clear_cl_head(struct fat_descriptor *, cl_t);
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bool fat_is_cl_head(struct fat_descriptor *, cl_t);
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cl_t fat_get_cl_next(struct fat_descriptor *, cl_t);
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int fat_set_cl_next(struct fat_descriptor *, cl_t, cl_t);
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cl_t fat_allocate_cluster(struct fat_descriptor *fat);
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struct bootblock* fat_get_boot(struct fat_descriptor *);
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int fat_get_fd(struct fat_descriptor *);
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bool fat_is_valid_cl(struct fat_descriptor *, cl_t);
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/*
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* Read the FAT 0 and return a pointer to the newly allocated
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* descriptor of it.
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*/
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int readfat(int, struct bootblock *, struct fat_descriptor **);
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/*
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* Write back FAT entries
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*/
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int writefat(struct fat_descriptor *);
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/*
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* Read a directory
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*/
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int resetDosDirSection(struct fat_descriptor *);
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void finishDosDirSection(void);
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int handleDirTree(struct fat_descriptor *);
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/*
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* Cross-check routines run after everything is completely in memory
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*/
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int checkchain(struct fat_descriptor *, cl_t, size_t *);
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/*
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* Check for lost cluster chains
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*/
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int checklost(struct fat_descriptor *);
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/*
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* Try to reconnect a lost cluster chain
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*/
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int reconnect(struct fat_descriptor *, cl_t, size_t);
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void finishlf(void);
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/*
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* Small helper functions
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*/
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/*
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* Return the type of a reserved cluster as text
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*/
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const char *rsrvdcltype(cl_t);
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/*
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* Clear a cluster chain in a FAT
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*/
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void clearchain(struct fat_descriptor *, cl_t);
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#endif
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