From: Stanislaw Kardach <kda@semihalf.com>
Date: Wed, 11 May 2022 14:56:50 +0000 (+0200)
Subject: examples/l3fwd: fix scalar LPM
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=a137eb2b2512c202eb01ba96bb592a24cffc72c8;p=dpdk.git

examples/l3fwd: fix scalar LPM

The lpm_process_event_pkt() can either process a packet using an
architecture specific (defined for X86/SSE, ARM/Neon and PPC64/Altivec)
path or a scalar one. The choice is however done using an ifdef
pre-processor macro. Because of that the scalar version was apparently
not widely exercised/compiled.
Due to some copy/paste errors, the scalar logic in
lpm_process_event_pkt() retained a "continue" statement where it should
utilize rfc1812_process() and return the port/BAD_PORT.

Fixes: 99fc91d18082 ("examples/l3fwd: add event lpm main loop")

Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
---

diff --git a/examples/l3fwd/l3fwd_lpm.c b/examples/l3fwd/l3fwd_lpm.c
index 501fc5db5e..d1b850dd5b 100644
--- a/examples/l3fwd/l3fwd_lpm.c
+++ b/examples/l3fwd/l3fwd_lpm.c
@@ -28,6 +28,7 @@
 #include <rte_lpm6.h>
 
 #include "l3fwd.h"
+#include "l3fwd_common.h"
 #include "l3fwd_event.h"
 
 #include "lpm_route_parse.c"
@@ -237,30 +238,17 @@ lpm_process_event_pkt(const struct lcore_conf *lconf, struct rte_mbuf *mbuf)
 
 	struct rte_ether_hdr *eth_hdr = rte_pktmbuf_mtod(mbuf,
 			struct rte_ether_hdr *);
-#ifdef DO_RFC_1812_CHECKS
-	struct rte_ipv4_hdr *ipv4_hdr;
-	if (RTE_ETH_IS_IPV4_HDR(mbuf->packet_type)) {
-		/* Handle IPv4 headers.*/
-		ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf,
-				struct rte_ipv4_hdr *,
-				sizeof(struct rte_ether_hdr));
-
-		if (is_valid_ipv4_pkt(ipv4_hdr, mbuf->pkt_len)
-				< 0) {
-			mbuf->port = BAD_PORT;
-			continue;
-		}
-		/* Update time to live and header checksum */
-		--(ipv4_hdr->time_to_live);
-		++(ipv4_hdr->hdr_checksum);
-	}
-#endif
+
 	/* dst addr */
 	*(uint64_t *)&eth_hdr->dst_addr = dest_eth_addr[mbuf->port];
 
 	/* src addr */
 	rte_ether_addr_copy(&ports_eth_addr[mbuf->port],
 			&eth_hdr->src_addr);
+
+	rfc1812_process(rte_pktmbuf_mtod_offset(mbuf, struct rte_ipv4_hdr *,
+						sizeof(struct rte_ether_hdr)),
+			&mbuf->port, mbuf->packet_type);
 #endif
 	return mbuf->port;
 }