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Date: Tue, 11 Nov 2014 10:55:37 +0100
From: Olivier MATZ <olivier.matz@6wind.com>
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To: "Liu, Jijiang" <jijiang.liu@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
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Cc: "jigsaw@gmail.com" <jigsaw@gmail.com>
Subject: Re: [dpdk-dev] [PATCH 10/12] testpmd: rework csum forward engine
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Hi Jijiang,

On 11/11/2014 09:35 AM, Liu, Jijiang wrote:
> The PKT_TX_VXLAN_CKSUM was not set in the patch, and VXLAN TX checksum offload would not work. 

Thank you for reporting this. Indeed, there is an issue. See below.

>> +/* Calculate the checksum of outer header (only vxlan is supported,
>> + * meaning IP + UDP). The caller already checked that it's a vxlan
>> + * packet */
>> +static uint64_t
>> +process_outer_cksums(void *outer_l3_hdr, uint16_t outer_ethertype,
>> +	uint16_t outer_l3_len, uint16_t testpmd_ol_flags) {
>> +	struct ipv4_hdr *ipv4_hdr = outer_l3_hdr;
>> +	struct ipv6_hdr *ipv6_hdr = outer_l3_hdr;
>> +	struct udp_hdr *udp_hdr;
>> +	uint64_t ol_flags = 0;
>> +
>> +	if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM)
>> +		ol_flags |= PKT_TX_IP_CKSUM;

Here it should be: ol_flags |= PKT_TX_VXLAN_CKSUM

I'll fix that in the next version.

Regards,
Olivier