From 82a7af95e7553747dcebdb865a9c9a67826745d4 Mon Sep 17 00:00:00 2001 From: Steve Shin Date: Thu, 18 Aug 2016 08:16:27 -0700 Subject: [PATCH] tuntap_rx modification to handle jumbo packets ( > 2K bytes) Change-Id: Iebe30b87457741ac268b24c96fa7ea8ad1e101a6 Signed-off-by: Steve Shin --- vnet/vnet/unix/tuntap.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/vnet/vnet/unix/tuntap.c b/vnet/vnet/unix/tuntap.c index 967c0aca4ac..01da1730e6c 100644 --- a/vnet/vnet/unix/tuntap.c +++ b/vnet/vnet/unix/tuntap.c @@ -206,6 +206,7 @@ tuntap_rx (vlib_main_t * vm, #else dpdk_main_t * dm = &dpdk_main; u32 free_list_index = dm->vlib_buffer_free_list_index; + struct rte_mbuf *first_mb = NULL, *prev_mb = NULL; #endif /* Make sure we have some RX buffers. */ @@ -262,6 +263,15 @@ tuntap_rx (vlib_main_t * vm, b = vlib_get_buffer (vm, tm->rx_buffers[i_rx]); #if DPDK == 1 mb = rte_mbuf_from_vlib_buffer(b); + + if (first_mb == NULL) + first_mb = mb; + + if (prev_mb != NULL) + { + prev_mb->next = mb; + first_mb->nb_segs++; + } #endif b->flags = 0; b->current_data = 0; @@ -270,12 +280,13 @@ tuntap_rx (vlib_main_t * vm, n_bytes_left -= buffer_size; #if DPDK == 1 rte_pktmbuf_data_len (mb) = b->current_length; + mb->data_off = RTE_PKTMBUF_HEADROOM + b->current_data; #endif if (n_bytes_left <= 0) { #if DPDK == 1 - rte_pktmbuf_pkt_len (mb) = n_bytes_in_packet; + rte_pktmbuf_pkt_len (first_mb) = n_bytes_in_packet; #endif break; } @@ -284,9 +295,7 @@ tuntap_rx (vlib_main_t * vm, b->flags |= VLIB_BUFFER_NEXT_PRESENT; b->next_buffer = tm->rx_buffers[i_rx]; #if DPDK == 1 - ASSERT(0); - // ((struct rte_pktmbuf *)(b->mb))->next = - // vlib_get_buffer (vm, tm->rx_buffers[i_rx])->mb; + prev_mb = mb; #endif } -- 2.16.6