f2fs_start_bidx_of_node
ei.fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_folio), dn->inode) +
block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode);
fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_folio),
start_bidx = f2fs_start_bidx_of_node(nofs, inode) +
start_bidx = f2fs_start_bidx_of_node(nofs, inode)
bidx = f2fs_start_bidx_of_node(offset, inode) +
start = f2fs_start_bidx_of_node(ofs_of_node(folio), inode);