ext4: add a function which sets up a block group descriptors of a flex bg

	return err;

}

/*

 * ext4_setup_new_descs() will set up the group descriptor descriptors of a flex bg

 */

static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,

				struct ext4_new_flex_group_data *flex_gd)

{

	struct ext4_new_group_data	*group_data = flex_gd->groups;

	struct ext4_group_desc		*gdp;

	struct ext4_sb_info		*sbi = EXT4_SB(sb);

	struct buffer_head		*gdb_bh;

	ext4_group_t			group;

	__u16				*bg_flags = flex_gd->bg_flags;

	int				i, gdb_off, gdb_num, err = 0;

	for (i = 0; i < flex_gd->count; i++, group_data++, bg_flags++) {

		group = group_data->group;

		gdb_off = group % EXT4_DESC_PER_BLOCK(sb);

		gdb_num = group / EXT4_DESC_PER_BLOCK(sb);

		/*

		 * get_write_access() has been called on gdb_bh by ext4_add_new_desc().

		 */

		gdb_bh = sbi->s_group_desc[gdb_num];

		/* Update group descriptor block for new group */

		gdp = (struct ext4_group_desc *)((char *)gdb_bh->b_data +

						 gdb_off * EXT4_DESC_SIZE(sb));

		memset(gdp, 0, EXT4_DESC_SIZE(sb));

		ext4_block_bitmap_set(sb, gdp, group_data->block_bitmap);

		ext4_inode_bitmap_set(sb, gdp, group_data->inode_bitmap);

		ext4_inode_table_set(sb, gdp, group_data->inode_table);

		ext4_free_group_clusters_set(sb, gdp,

					     EXT4_B2C(sbi, group_data->free_blocks_count));

		ext4_free_inodes_set(sb, gdp, EXT4_INODES_PER_GROUP(sb));

		gdp->bg_flags = cpu_to_le16(*bg_flags);

		gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp);

		err = ext4_handle_dirty_metadata(handle, NULL, gdb_bh);

		if (unlikely(err)) {

			ext4_std_error(sb, err);

			break;

		}

		/*

		 * We can allocate memory for mb_alloc based on the new group

		 * descriptor

		 */

		err = ext4_mb_add_groupinfo(sb, group, gdp);

		if (err)

			break;

	}

	return err;

}

/* Add group descriptor data to an existing or new group descriptor block.

 * Ensure we handle all possible error conditions _before_ we start modifying

 * the filesystem, because we cannot abort the transaction and not have it