ocfs2_which_cluster_group
first_group = ocfs2_which_cluster_group(main_bm_inode, start);
last_group = ocfs2_which_cluster_group(main_bm_inode,
lgd_blkno = ocfs2_which_cluster_group(main_bm_inode,
else if (input->group != ocfs2_which_cluster_group(inode, cluster))
gd_blkno = ocfs2_which_cluster_group(inode, cluster);
*bg_blkno = ocfs2_which_cluster_group(inode,
u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster);