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tuntap_rx modification to handle jumbo packets ( > 2K bytes)

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Change-Id: Iebe30b87457741ac268b24c96fa7ea8ad1e101a6
Signed-off-by: Steve Shin <jonshin@cisco.com>
(cherry picked from commit 82a7af95e7)
This commit is contained in:
Steve Shin
2016-08-18 08:16:27 -07:00
parent 94195c85fe
commit d7935e8c42
1 changed files with 13 additions and 4 deletions
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17
vnet/vnet/unix/tuntap.c
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@ -232,6 +232,7 @@ 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. */
@ -288,6 +289,15 @@ 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;
@ -296,12 +306,13 @@ 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;
}
@ -310,9 +321,7 @@ 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
}