f2fs_get_read_data_folio
folio = f2fs_get_read_data_folio(inode, index, 0, false, next_pgofs);
folio = f2fs_get_read_data_folio(inode, index, 0, for_write, NULL);
struct folio *f2fs_get_read_data_folio(struct inode *inode, pgoff_t index,
data_folio = f2fs_get_read_data_folio(inode, start_bidx,