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- Log ----------------------------------------------------------------- commit 72febbae5ea55a5fd051978fbfa0f669cf0e99fc Author: Bogdan Pricope bogdan.pricope@linaro.org Date: Thu Mar 22 16:57:49 2018 +0200

linux-gen: pktio: dpdk: accept UDPv4 packets with all-zero csum

Accept IPv4 UDP packets with all-zero checksum field even if DPDK reported it as bad checksum value. This patch fixes bug: https://bugs.linaro.org/show_bug.cgi?id=3685.

Signed-off-by: Bogdan Pricope bogdan.pricope@linaro.org Reviewed-by: Bill Fischofer bill.fischofer@linaro.org Signed-off-by: Maxim Uvarov maxim.uvarov@linaro.org

diff --git a/platform/linux-generic/pktio/dpdk.c b/platform/linux-generic/pktio/dpdk.c index 7b9fed72..83dbec4f 100644 --- a/platform/linux-generic/pktio/dpdk.c +++ b/platform/linux-generic/pktio/dpdk.c @@ -27,6 +27,7 @@ #include <odp_libconfig_internal.h>

#include <protocols/eth.h> +#include <protocols/udp.h>

#include <rte_config.h> #include <rte_malloc.h> @@ -419,6 +420,7 @@ MEMPOOL_REGISTER_OPS(ops_stack); #define IP4_CSUM_RESULT(m) (m->ol_flags & PKT_RX_IP_CKSUM_MASK) #define L4_CSUM_RESULT(m) (m->ol_flags & PKT_RX_L4_CKSUM_MASK) #define HAS_L4_PROTO(m, proto) ((m->packet_type & RTE_PTYPE_L4_MASK) == proto) +#define UDP4_CSUM(_p) (((_odp_udphdr_t *)_odp_packet_l4_ptr(_p, NULL))->chksum)

#define PKTIN_CSUM_BITS 0x1C

@@ -451,6 +453,12 @@ static inline int pkt_set_ol_rx(odp_pktin_config_opt_t *pktin_cfg, if (packet_csum_result == PKT_RX_L4_CKSUM_GOOD) { pkt_hdr->p.input_flags.l4_chksum_done = 1; } else if (packet_csum_result != PKT_RX_L4_CKSUM_UNKNOWN) { + if (pkt_hdr->p.input_flags.ipv4 && + pkt_hdr->p.input_flags.udp && + !UDP4_CSUM(packet_handle(pkt_hdr))) { + pkt_hdr->p.input_flags.l4_chksum_done = 1; + return 0; + } if (pktin_cfg->bit.drop_udp_err) return -1;

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Summary of changes: platform/linux-generic/pktio/dpdk.c | 8 ++++++++ 1 file changed, 8 insertions(+)

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