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.dohe...@intel.com>
Signed-off-by: Radu Nicolau <radu.nico...@intel.com>
---
doc/guides/sample_app_ug/ipsec_secgw.rst | 10 ++++++++++
examples/ipsec-secgw/ipsec-secgw.c | 4 ++++
examples/ipsec-secgw/ipsec.h | 1 +
examples/ipsec-secgw/ipsec_process.c | 2 ++
examples/ipsec-secgw/sa.c | 12 ++++++++++++
5 files changed, 29 insertions(+)
diff --git a/doc/guides/sample_app_ug/ipsec_secgw.rst
b/doc/guides/sample_app_ug/ipsec_secgw.rst
index 846cf2b81a..cf7a94f58a 100644
--- a/doc/guides/sample_app_ug/ipsec_secgw.rst
+++ b/doc/guides/sample_app_ug/ipsec_secgw.rst
@@ -725,6 +725,16 @@ where each options means:
* *udp-encap*
+ ``<mss>``
+
+ * Maximum segment size for TSO offload, available for egress SAs only.
+
+ * Optional: Yes, TSO offload not set by default
+
+ * Syntax:
+
+ * *mss N* N is the segment size
+
Example SA rules:
.. code-block:: console
diff --git a/examples/ipsec-secgw/ipsec-secgw.c
b/examples/ipsec-secgw/ipsec-secgw.c
index 1d30f39450..3da520ec6e 100644
--- a/examples/ipsec-secgw/ipsec-secgw.c
+++ b/examples/ipsec-secgw/ipsec-secgw.c
@@ -399,6 +399,10 @@ prepare_one_packet(struct rte_mbuf *pkt, struct
ipsec_traffic *t)
pkt->l2_len = 0;
pkt->l3_len = sizeof(*iph4);
pkt->packet_type |= RTE_PTYPE_L3_IPV4;
+ if (pkt->packet_type & RTE_PTYPE_L4_TCP)
+ pkt->l4_len = sizeof(struct rte_tcp_hdr);
+ else
+ pkt->l4_len = sizeof(struct rte_udp_hdr);
} else if (eth->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6)) {
int next_proto;
size_t l3len, ext_len;
diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
index 50fb7a8b46..36b1ac9355 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/ipsec_process.c
b/examples/ipsec-secgw/ipsec_process.c
index 5012e1a6a4..fc2a3cbcd1 100644
--- a/examples/ipsec-secgw/ipsec_process.c
+++ b/examples/ipsec-secgw/ipsec_process.c
@@ -222,6 +222,8 @@ prep_process_group(void *sa, struct rte_mbuf *mb[],
uint32_t cnt)
for (j = 0; j != cnt; j++) {
priv = get_priv(mb[j]);
priv->sa = sa;
+ if (priv->sa->mss)
+ mb[j]->tso_segsz = priv->sa->mss;
}
}
diff --git a/examples/ipsec-secgw/sa.c b/examples/ipsec-secgw/sa.c
index b32c168bcc..3851a900dc 100644
--- a/examples/ipsec-secgw/sa.c
+++ b/examples/ipsec-secgw/sa.c
@@ -678,6 +678,16 @@ 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;
@@ -1326,11 +1336,13 @@ fill_ipsec_sa_prm(struct rte_ipsec_sa_prm *prm, const
struct ipsec_sa *ss,
if (IS_IP4_TUNNEL(ss->flags)) {
prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV4;
prm->tun.hdr_len = sizeof(*v4);
+ prm->tun.hdr_l3_off = 0;
prm->tun.next_proto = rc;
prm->tun.hdr = v4;
} else if (IS_IP6_TUNNEL(ss->flags)) {
prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV6;
prm->tun.hdr_len = sizeof(*v6);
+ prm->tun.hdr_l3_off = 0;
prm->tun.next_proto = rc;
prm->tun.hdr = v6;
} else {
--
2.25.1
