[dpdk-dev] [EXT] [PATCH 3/7] examples/ipsec-secgw: add support for TSO

[Akhil Goyal]

> Add support to allow user to specific MSS for TSO offload on a per SA

Spell check 'specify'

> basis. MSS configuration in the context of IPsec is only supported for
> outbound SA's in the context of an inline IPsec Crypto offload.
> 
> Signed-off-by: Declan Doherty <declan.doherty at intel.com>
> Signed-off-by: Radu Nicolau <radu.nicolau at intel.com>
> ---
>  examples/ipsec-secgw/ipsec.h |  1 +
>  examples/ipsec-secgw/sa.c    | 15 +++++++++++++++

No update for the new mss option in the documentation of the app

Please also update description to explain the new option.

>  2 files changed, 16 insertions(+)
> 
> diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
> index b496b4a936..7ba29406bf 100644
> --- a/examples/ipsec-secgw/ipsec.h
> +++ b/examples/ipsec-secgw/ipsec.h
> @@ -143,6 +143,7 @@ struct ipsec_sa {
>  	enum rte_security_ipsec_sa_direction direction;
>  	uint8_t udp_encap;
>  	uint16_t portid;
> +	uint16_t mss;
>  	uint8_t fdir_qid;
>  	uint8_t fdir_flag;
> 
> diff --git a/examples/ipsec-secgw/sa.c b/examples/ipsec-secgw/sa.c
> index d5943f8cdc..bc83e4bccc 100644
> --- a/examples/ipsec-secgw/sa.c
> +++ b/examples/ipsec-secgw/sa.c
> @@ -695,6 +695,16 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
>  			continue;
>  		}
> 
> +		if (strcmp(tokens[ti], "mss") == 0) {
> +			INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
> +			if (status->status < 0)
> +				return;
> +			rule->mss = atoi(tokens[ti]);
> +			if (status->status < 0)
> +				return;
> +			continue;
> +		}
> +
>  		if (strcmp(tokens[ti], "fallback") == 0) {
>  			struct rte_ipsec_session *fb;
> 
> @@ -1366,6 +1376,11 @@ fill_ipsec_sa_prm(struct rte_ipsec_sa_prm *prm,
> const struct ipsec_sa *ss,
>  	prm->ipsec_xform.options.ecn = 1;
>  	prm->ipsec_xform.options.copy_dscp = 1;
> 
> +	if (ss->mss > 0) {
> +		prm->ipsec_xform.options.tso = 1;
> +		prm->ipsec_xform.mss = ss->mss;
> +	}
> +
>  	if (IS_TRANSPORT(ss->flags)) {
>  		/* transport mode */
>  		prm->trs.proto = rc;
> --
> 2.25.1