[dpdk-dev] [PATCH v1 2/3] port: fix ras ring ports

[Piotr Azarewicz <piotrx.t.azarewicz@intel.com>]

Bug fixes for ring ports with IPv4/IPv6 reassembly support.
Previous implementation can't work properly due to incorrect choosing
process function.
Also, assuming that, when processing ip packet, ip header is know we can
set l3_len parameter here.

Signed-off-by: Piotr Azarewicz <piotrx.t.azarewicz@intel.com>
---
 lib/librte_port/rte_port_ras.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/librte_port/rte_port_ras.c b/lib/librte_port/rte_port_ras.c
index 6bd0f8c..e45d450 100644
--- a/lib/librte_port/rte_port_ras.c
+++ b/lib/librte_port/rte_port_ras.c
@@ -144,7 +144,7 @@ rte_port_ring_writer_ras_create(void *params, int socket_id, int is_ipv4)
 	port->tx_burst_sz = conf->tx_burst_sz;
 	port->tx_buf_count = 0;
 
-	port->f_ras = (is_ipv4 == 0) ? process_ipv4 : process_ipv6;
+	port->f_ras = (is_ipv4 == 1) ? process_ipv4 : process_ipv6;
 
 	return port;
 }
@@ -182,7 +182,7 @@ process_ipv4(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt)
 	/* Assume there is no ethernet header */
 	struct ipv4_hdr *pkt_hdr = rte_pktmbuf_mtod(pkt, struct ipv4_hdr *);
 
-	/* Get "Do not fragment" flag and fragment offset */
+	/* Get "More fragments" flag and fragment offset */
 	uint16_t frag_field = rte_be_to_cpu_16(pkt_hdr->fragment_offset);
 	uint16_t frag_offset = (uint16_t)(frag_field & IPV4_HDR_OFFSET_MASK);
 	uint16_t frag_flag = (uint16_t)(frag_field & IPV4_HDR_MF_FLAG);
@@ -195,6 +195,8 @@ process_ipv4(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt)
 		struct rte_ip_frag_tbl *tbl = p->frag_tbl;
 		struct rte_ip_frag_death_row *dr = &p->death_row;
 
+		pkt->l3_len = sizeof(*pkt_hdr);
+
 		/* Process this fragment */
 		mo = rte_ipv4_frag_reassemble_packet(tbl, dr, pkt, rte_rdtsc(),
 				pkt_hdr);
@@ -224,6 +226,8 @@ process_ipv6(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt)
 		struct rte_ip_frag_tbl *tbl = p->frag_tbl;
 		struct rte_ip_frag_death_row *dr = &p->death_row;
 
+		pkt->l3_len = sizeof(*pkt_hdr) + sizeof(*frag_hdr);
+
 		/* Process this fragment */
 		mo = rte_ipv6_frag_reassemble_packet(tbl, dr, pkt, rte_rdtsc(), pkt_hdr,
 				frag_hdr);
-- 
1.7.9.5