568 			 size_t subbuf_size,  in relay_open()  argument
576 	if (!(subbuf_size && n_subbufs))  in relay_open()
578 	if (subbuf_size > UINT_MAX / n_subbufs)  in relay_open()
587 	chan->subbuf_size = subbuf_size;  in relay_open()
588 	chan->alloc_size = PAGE_ALIGN(subbuf_size * n_subbufs);  in relay_open()
724 	if (unlikely(length > buf->chan->subbuf_size))  in relay_switch_subbuf()
727 	if (buf->offset != buf->chan->subbuf_size + 1) {  in relay_switch_subbuf()
728 		buf->prev_padding = buf->chan->subbuf_size - buf->offset;  in relay_switch_subbuf()
734 				buf->chan->subbuf_size -  in relay_switch_subbuf()
737 			buf->early_bytes += buf->chan->subbuf_size -  in relay_switch_subbuf()
752 	new = buf->start + new_subbuf * buf->chan->subbuf_size;  in relay_switch_subbuf()
755 		buf->offset = buf->chan->subbuf_size + 1;  in relay_switch_subbuf()
761 	if (unlikely(length + buf->offset > buf->chan->subbuf_size))  in relay_switch_subbuf()
830 		       chan->last_toobig, chan->subbuf_size);  in relay_close()
940 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_consume()  local
948 	if (buf->bytes_consumed + bytes_consumed > subbuf_size) {  in relay_file_read_consume()
957 		read_subbuf = read_pos / buf->chan->subbuf_size;  in relay_file_read_consume()
958 	if (buf->bytes_consumed + buf->padding[read_subbuf] == subbuf_size) {  in relay_file_read_consume()
960 		    (buf->offset == subbuf_size))  in relay_file_read_consume()
972 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_avail()  local
981 	if (unlikely(buf->offset > subbuf_size)) {  in relay_file_read_avail()
993 	produced = (produced % n_subbufs) * subbuf_size + buf->offset;  in relay_file_read_avail()
994 	consumed = (consumed % n_subbufs) * subbuf_size + buf->bytes_consumed;  in relay_file_read_avail()
997 		produced += n_subbufs * subbuf_size;  in relay_file_read_avail()
1000 		if (buf->offset == subbuf_size &&  in relay_file_read_avail()
1019 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_subbuf_avail()  local
1021 	write_subbuf = (buf->data - buf->start) / subbuf_size;  in relay_file_read_subbuf_avail()
1022 	write_offset = buf->offset > subbuf_size ? subbuf_size : buf->offset;  in relay_file_read_subbuf_avail()
1023 	read_subbuf = read_pos / subbuf_size;  in relay_file_read_subbuf_avail()
1024 	read_offset = read_pos % subbuf_size;  in relay_file_read_subbuf_avail()
1031 		avail = (subbuf_size - padding) - read_offset;  in relay_file_read_subbuf_avail()
1049 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_start_pos()  local
1054 		read_pos = consumed * subbuf_size + buf->bytes_consumed;  in relay_file_read_start_pos()
1055 	read_subbuf = read_pos / subbuf_size;  in relay_file_read_start_pos()
1057 	padding_start = (read_subbuf + 1) * subbuf_size - padding;  in relay_file_read_start_pos()
1058 	padding_end = (read_subbuf + 1) * subbuf_size;  in relay_file_read_start_pos()
1061 		read_pos = read_subbuf * subbuf_size;  in relay_file_read_start_pos()
1078 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_end_pos()  local
1081 	read_subbuf = read_pos / subbuf_size;  in relay_file_read_end_pos()
1083 	if (read_pos % subbuf_size + count + padding == subbuf_size)  in relay_file_read_end_pos()
1084 		end_pos = (read_subbuf + 1) * subbuf_size;  in relay_file_read_end_pos()
1087 	if (end_pos >= subbuf_size * n_subbufs)  in relay_file_read_end_pos()
1178 	if (rbuf->bytes_consumed >= rbuf->chan->subbuf_size) {  in relay_consume_bytes()
1180 		rbuf->bytes_consumed %= rbuf->chan->subbuf_size;  in relay_consume_bytes()
1217 	unsigned int subbuf_size = rbuf->chan->subbuf_size;  in subbuf_splice_actor()  local
1221 	size_t read_subbuf = read_start / subbuf_size;  in subbuf_splice_actor()
1223 	size_t nonpad_end = read_subbuf * subbuf_size + subbuf_size - padding;  in subbuf_splice_actor()
1245 	if (len > (subbuf_size - read_start % subbuf_size))  in subbuf_splice_actor()
1246 		len = subbuf_size - read_start % subbuf_size;  in subbuf_splice_actor()