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/*
* dirblock.c --- directory block routines.
*
* Copyright (C) 1995, 1996 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
#include "config.h"
#include <stdio.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <time.h>
#include "ext2_fs.h"
#include "ext2fs.h"
errcode_t ext2fs_read_dir_block4(ext2_filsys fs, blk64_t block,
void *buf, int flags EXT2FS_ATTR((unused)),
ext2_ino_t ino)
{
errcode_t retval;
int corrupt = 0;
retval = io_channel_read_blk64(fs->io, block, 1, buf);
if (retval)
return retval;
if (!(fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) &&
!ext2fs_dir_block_csum_verify(fs, ino,
(struct ext2_dir_entry *)buf))
corrupt = 1;
#ifdef WORDS_BIGENDIAN
retval = ext2fs_dirent_swab_in(fs, buf, flags);
#endif
if (!retval && corrupt)
retval = EXT2_ET_DIR_CSUM_INVALID;
return retval;
}
errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
void *buf, int flags EXT2FS_ATTR((unused)))
{
return ext2fs_read_dir_block4(fs, block, buf, flags, 0);
}
errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
void *buf, int flags EXT2FS_ATTR((unused)))
{
return ext2fs_read_dir_block3(fs, block, buf, flags);
}
errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
void *buf)
{
return ext2fs_read_dir_block3(fs, block, buf, 0);
}
errcode_t ext2fs_write_dir_block4(ext2_filsys fs, blk64_t block,
void *inbuf, int flags EXT2FS_ATTR((unused)),
ext2_ino_t ino)
{
errcode_t retval;
char *buf = inbuf;
#ifdef WORDS_BIGENDIAN
retval = ext2fs_get_mem(fs->blocksize, &buf);
if (retval)
return retval;
memcpy(buf, inbuf, fs->blocksize);
retval = ext2fs_dirent_swab_out(fs, buf, flags);
if (retval)
return retval;
#endif
retval = ext2fs_dir_block_csum_set(fs, ino,
(struct ext2_dir_entry *)buf);
if (retval)
goto out;
retval = io_channel_write_blk64(fs->io, block, 1, buf);
out:
#ifdef WORDS_BIGENDIAN
ext2fs_free_mem(&buf);
#endif
return retval;
}
errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
void *inbuf, int flags EXT2FS_ATTR((unused)))
{
return ext2fs_write_dir_block4(fs, block, inbuf, flags, 0);
}
errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
void *inbuf, int flags EXT2FS_ATTR((unused)))
{
return ext2fs_write_dir_block3(fs, block, inbuf, flags);
}
errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
void *inbuf)
{
return ext2fs_write_dir_block3(fs, block, inbuf, 0);
}
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