/* vi: set sw=4 ts=4: *//* * ext_attr.c --- extended attribute blocks * * Copyright (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org> * * Copyright (C) 2002 Theodore Ts'o. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Public * License. * %End-Header% */#include <stdio.h>#include <unistd.h>#include <string.h>#include <time.h>#include "ext2_fs.h"#include "ext2_ext_attr.h"#include "ext2fs.h"errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf){	errcode_t	retval;	retval = io_channel_read_blk(fs->io, block, 1, buf);	if (retval)		return retval;#if BB_BIG_ENDIAN	if ((fs->flags & (EXT2_FLAG_SWAP_BYTES|			  EXT2_FLAG_SWAP_BYTES_READ)) != 0)		ext2fs_swap_ext_attr(buf, buf, fs->blocksize, 1);#endif	return 0;}errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, void *inbuf){	errcode_t	retval;	char		*write_buf;	char		*buf = NULL;	if (BB_BIG_ENDIAN && ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||	    (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE))) {		retval = ext2fs_get_mem(fs->blocksize, &buf);		if (retval)			return retval;		write_buf = buf;		ext2fs_swap_ext_attr(buf, inbuf, fs->blocksize, 1);	} else		write_buf = (char *) inbuf;	retval = io_channel_write_blk(fs->io, block, 1, write_buf);	if (buf)		ext2fs_free_mem(&buf);	if (!retval)		ext2fs_mark_changed(fs);	return retval;}/* * This function adjusts the reference count of the EA block. */errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,				    char *block_buf, int adjust,				    __u32 *newcount){	errcode_t	retval;	struct ext2_ext_attr_header *header;	char	*buf = 0;	if ((blk >= fs->super->s_blocks_count) ||	    (blk < fs->super->s_first_data_block))		return EXT2_ET_BAD_EA_BLOCK_NUM;	if (!block_buf) {		retval = ext2fs_get_mem(fs->blocksize, &buf);		if (retval)			return retval;		block_buf = buf;	}	retval = ext2fs_read_ext_attr(fs, blk, block_buf);	if (retval)		goto errout;	header = (struct ext2_ext_attr_header *) block_buf;	header->h_refcount += adjust;	if (newcount)		*newcount = header->h_refcount;	retval = ext2fs_write_ext_attr(fs, blk, block_buf);	if (retval)		goto errout;errout:	if (buf)		ext2fs_free_mem(&buf);	return retval;}