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