| /* |
| * 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); |
| } |
| |