563 			 size_t subbuf_size,  in relay_open()  argument
572 	if (!(subbuf_size && n_subbufs))  in relay_open()
574 	if (subbuf_size > UINT_MAX / n_subbufs)  in relay_open()
584 	chan->subbuf_size = subbuf_size;  in relay_open()
585 	chan->alloc_size = PAGE_ALIGN(subbuf_size * n_subbufs);  in relay_open()
744 	if (unlikely(length > buf->chan->subbuf_size))  in relay_switch_subbuf()
747 	if (buf->offset != buf->chan->subbuf_size + 1) {  in relay_switch_subbuf()
748 		buf->prev_padding = buf->chan->subbuf_size - buf->offset;  in relay_switch_subbuf()
754 				buf->chan->subbuf_size -  in relay_switch_subbuf()
757 			buf->early_bytes += buf->chan->subbuf_size -  in relay_switch_subbuf()
773 	new = buf->start + new_subbuf * buf->chan->subbuf_size;  in relay_switch_subbuf()
776 		buf->offset = buf->chan->subbuf_size + 1;  in relay_switch_subbuf()
782 	if (unlikely(length + buf->offset > buf->chan->subbuf_size))  in relay_switch_subbuf()
851 		       chan->last_toobig, chan->subbuf_size);  in relay_close()
962 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_consume()  local
970 	if (buf->bytes_consumed + bytes_consumed > subbuf_size) {  in relay_file_read_consume()
979 		read_subbuf = read_pos / buf->chan->subbuf_size;  in relay_file_read_consume()
980 	if (buf->bytes_consumed + buf->padding[read_subbuf] == subbuf_size) {  in relay_file_read_consume()
982 		    (buf->offset == subbuf_size))  in relay_file_read_consume()
994 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_avail()  local
1003 	if (unlikely(buf->offset > subbuf_size)) {  in relay_file_read_avail()
1015 	produced = (produced % n_subbufs) * subbuf_size + buf->offset;  in relay_file_read_avail()
1016 	consumed = (consumed % n_subbufs) * subbuf_size + buf->bytes_consumed;  in relay_file_read_avail()
1019 		produced += n_subbufs * subbuf_size;  in relay_file_read_avail()
1022 		if (buf->offset == subbuf_size &&  in relay_file_read_avail()
1041 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_subbuf_avail()  local
1043 	write_subbuf = (buf->data - buf->start) / subbuf_size;  in relay_file_read_subbuf_avail()
1044 	write_offset = buf->offset > subbuf_size ? subbuf_size : buf->offset;  in relay_file_read_subbuf_avail()
1045 	read_subbuf = read_pos / subbuf_size;  in relay_file_read_subbuf_avail()
1046 	read_offset = read_pos % subbuf_size;  in relay_file_read_subbuf_avail()
1053 		avail = (subbuf_size - padding) - read_offset;  in relay_file_read_subbuf_avail()
1071 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_start_pos()  local
1076 		read_pos = consumed * subbuf_size + buf->bytes_consumed;  in relay_file_read_start_pos()
1077 	read_subbuf = read_pos / subbuf_size;  in relay_file_read_start_pos()
1079 	padding_start = (read_subbuf + 1) * subbuf_size - padding;  in relay_file_read_start_pos()
1080 	padding_end = (read_subbuf + 1) * subbuf_size;  in relay_file_read_start_pos()
1083 		read_pos = read_subbuf * subbuf_size;  in relay_file_read_start_pos()
1100 	size_t subbuf_size = buf->chan->subbuf_size;  in relay_file_read_end_pos()  local
1103 	read_subbuf = read_pos / subbuf_size;  in relay_file_read_end_pos()
1105 	if (read_pos % subbuf_size + count + padding == subbuf_size)  in relay_file_read_end_pos()
1106 		end_pos = (read_subbuf + 1) * subbuf_size;  in relay_file_read_end_pos()
1109 	if (end_pos >= subbuf_size * n_subbufs)  in relay_file_read_end_pos()
1162 	if (rbuf->bytes_consumed >= rbuf->chan->subbuf_size) {  in relay_consume_bytes()
1164 		rbuf->bytes_consumed %= rbuf->chan->subbuf_size;  in relay_consume_bytes()
1201 	unsigned int subbuf_size = rbuf->chan->subbuf_size;  in subbuf_splice_actor()  local
1205 	size_t read_subbuf = read_start / subbuf_size;  in subbuf_splice_actor()
1207 	size_t nonpad_end = read_subbuf * subbuf_size + subbuf_size - padding;  in subbuf_splice_actor()
1228 	if (len > (subbuf_size - read_start % subbuf_size))  in subbuf_splice_actor()
1229 		len = subbuf_size - read_start % subbuf_size;  in subbuf_splice_actor()