2 * ind_block.c --- indirect block I/O routines
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
5 * 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o.
8 * This file may be redistributed under the terms of the GNU Library
9 * General Public License, version 2.
22 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf)
25 #ifdef WORDS_BIGENDIAN
28 int limit = fs->blocksize >> 2;
31 if ((fs->flags & EXT2_FLAG_IMAGE_FILE) &&
32 (fs->io != fs->image_io))
33 memset(buf, 0, fs->blocksize);
35 retval = io_channel_read_blk(fs->io, blk, 1, buf);
39 #ifdef WORDS_BIGENDIAN
40 block_nr = (blk_t *) buf;
41 for (i = 0; i < limit; i++, block_nr++)
42 *block_nr = ext2fs_swab32(*block_nr);
47 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf)
49 #ifdef WORDS_BIGENDIAN
52 int limit = fs->blocksize >> 2;
55 if (fs->flags & EXT2_FLAG_IMAGE_FILE)
58 #ifdef WORDS_BIGENDIAN
59 block_nr = (blk_t *) buf;
60 for (i = 0; i < limit; i++, block_nr++)
61 *block_nr = ext2fs_swab32(*block_nr);
63 return io_channel_write_blk(fs->io, blk, 1, buf);