MINOR: mux-h2/htx: Support zero-copy when possible in h2_rcv_buf()

If the channel's buffer is empty and the message is small enough, we can swap
the H2S buffer with the channel one.
This commit is contained in:
Christopher Faulet 2019-05-15 10:07:59 +02:00 committed by Willy Tarreau
parent 9b04d22945
commit 2f6edc84a8

View File

@ -5395,6 +5395,15 @@ static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t coun
ret = h2s_htx->data;
buf_htx = htx_from_buf(buf);
/* <buf> is empty and the message is small enough, swap the
* buffers. */
if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
htx_to_buf(buf_htx, buf);
htx_to_buf(h2s_htx, &h2s->rxbuf);
b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
goto end;
}
htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
if (h2s_htx->flags & HTX_FL_PARSING_ERROR)