libmemif: zero-copy-slave mode + header space
Slave is now able to dequeue buffers from rx queue and enqueue them to tx queue
(zero-copy operation). Slave can produce buffers with headroom, which will allow adding
encap without copy.
Change-Id: Ia189f8de1a68be787545ed46cf78d36403e7e9bf
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
diff --git a/extras/libmemif/examples/icmp_responder/main.c b/extras/libmemif/examples/icmp_responder/main.c
index b820ad3..5e78acd 100644
--- a/extras/libmemif/examples/icmp_responder/main.c
+++ b/extras/libmemif/examples/icmp_responder/main.c
@@ -225,7 +225,7 @@
int err;
uint16_t r;
/* set data pointer to shared memory and set buffer_len to shared mmeory buffer len */
- err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, n, &r, 128);
+ err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, n, &r, 0);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_buffer_alloc: %s", memif_strerror (err));
@@ -311,24 +311,25 @@
&(c->tx_bufs + i)->len, c->ip_addr);
}
+ uint16_t fb;
/* mark memif buffers and shared memory buffers as free */
- err = memif_refill_queue (c->conn, qid, rx);
- c->rx_buf_num -= rx;
+ err = memif_refill_queue (c->conn, qid, rx, 0);
+ c->rx_buf_num -= fb;
DBG ("freed %d buffers. %u/%u alloc/free buffers",
- rx, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num);
+ fb, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num);
icmpr_tx_burst (c->tx_qid);
return 0;
error:
- err = memif_refill_queue (c->conn, qid, rx);
+ err = memif_refill_queue (c->conn, qid, rx, 0);
if (err != MEMIF_ERR_SUCCESS)
INFO ("memif_buffer_free: %s", memif_strerror (err));
- c->rx_buf_num -= rx;
+ c->rx_buf_num -= fb;
DBG ("freed %d buffers. %u/%u alloc/free buffers",
- rx, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num);
+ fb, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num);
return 0;
}