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

[Radu Nicolau <radu.nicolau@intel.com>]

Add support to allow user to specific MSS for TSO offload on a per SA
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@intel.com>
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
---
 examples/ipsec-secgw/ipsec.h |  1 +
 examples/ipsec-secgw/sa.c    | 15 +++++++++++++++
 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