fs/affs: add rename exchange

	return retval;

}

static int

affs_xrename(struct inode *old_dir, struct dentry *old_dentry,

	     struct inode *new_dir, struct dentry *new_dentry)

{

	struct super_block *sb = old_dir->i_sb;

	struct buffer_head *bh_old = NULL;

	struct buffer_head *bh_new = NULL;

	int retval;

	bh_old = affs_bread(sb, d_inode(old_dentry)->i_ino);

	if (!bh_old)

		return -EIO;

	bh_new = affs_bread(sb, d_inode(new_dentry)->i_ino);

	if (!bh_new)

		return -EIO;

	/* Remove old header from its parent directory. */

	affs_lock_dir(old_dir);

	retval = affs_remove_hash(old_dir, bh_old);

	affs_unlock_dir(old_dir);

	if (retval)

		goto done;

	/* Remove new header from its parent directory. */

	affs_lock_dir(new_dir);

	retval = affs_remove_hash(new_dir, bh_new);

	affs_unlock_dir(new_dir);

	if (retval)

		goto done;

	/* Insert old into the new directory with the new name. */

	affs_copy_name(AFFS_TAIL(sb, bh_old)->name, new_dentry);

	affs_fix_checksum(sb, bh_old);

	affs_lock_dir(new_dir);

	retval = affs_insert_hash(new_dir, bh_old);

	affs_unlock_dir(new_dir);

	/* Insert new into the old directory with the old name. */

	affs_copy_name(AFFS_TAIL(sb, bh_new)->name, old_dentry);

	affs_fix_checksum(sb, bh_new);

	affs_lock_dir(old_dir);

	retval = affs_insert_hash(old_dir, bh_new);

	affs_unlock_dir(old_dir);

done:

	mark_buffer_dirty_inode(bh_old, new_dir);

	mark_buffer_dirty_inode(bh_new, old_dir);

	affs_brelse(bh_old);

	affs_brelse(bh_new);

	return retval;

}

int affs_rename2(struct inode *old_dir, struct dentry *old_dentry,

			struct inode *new_dir, struct dentry *new_dentry,

			unsigned int flags)

{

	if (flags & ~RENAME_NOREPLACE)

	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))

		return -EINVAL;

	pr_debug("%s(old=%lu,\"%pd\" to new=%lu,\"%pd\")\n", __func__,

		 old_dir->i_ino, old_dentry, new_dir->i_ino, new_dentry);

	if (flags & RENAME_EXCHANGE)

		return affs_xrename(old_dir, old_dentry, new_dir, new_dentry);

	return affs_rename(old_dir, old_dentry, new_dir, new_dentry);

}