[dpdk-dev] [PATCH v4] examples/ipsec-secgw: support flow director feature

[Praveen Shetty <praveen.shetty@intel.com>]

Support load distribution in security gateway application using
NIC load distribution feature(Flow Director).
Flow Director is used to redirect the specified inbound ipsec flow
to a specified queue.This is achieved by extending the SA rule syntax
to support specification by adding new action_type of <flow-direction>
to a specified <port_id> <queue_id>.

Signed-off-by: Praveen Shetty <praveen.shetty@intel.com>
---
v4 changes:
1. Removed flow direction configuration changes as it is not required anymore.
2. Addressed all the review comments from Akhil and Anoob.
3. Included Release doc and Release notes.

 doc/guides/rel_notes/release_20_05.rst   |  4 ++
 doc/guides/sample_app_ug/ipsec_secgw.rst | 16 ++++++
 examples/ipsec-secgw/ep0.cfg             | 11 ++++
 examples/ipsec-secgw/ipsec-secgw.c       | 22 ++++++++
 examples/ipsec-secgw/ipsec.c             | 67 ++++++++++++++++++++++++
 examples/ipsec-secgw/ipsec.h             |  7 +++
 examples/ipsec-secgw/sa.c                | 61 +++++++++++++++++++--
 7 files changed, 185 insertions(+), 3 deletions(-)

diff --git a/doc/guides/rel_notes/release_20_05.rst b/doc/guides/rel_notes/release_20_05.rst
index 6b1a7c58c..a9ec163cf 100644
--- a/doc/guides/rel_notes/release_20_05.rst
+++ b/doc/guides/rel_notes/release_20_05.rst
@@ -81,6 +81,10 @@ New Features
   by making use of the event device capabilities. The event mode currently supports
   only inline IPsec protocol offload.
 
+* **Updated ipsec-secgw application.**
+
+  Added IPsec inbound load-distribution support for ipsec-secgw application using NIC
+  load distribution feature(Flow Director).
 
 Removed Items
 -------------
diff --git a/doc/guides/sample_app_ug/ipsec_secgw.rst b/doc/guides/sample_app_ug/ipsec_secgw.rst
index 038f593f4..12f921d76 100644
--- a/doc/guides/sample_app_ug/ipsec_secgw.rst
+++ b/doc/guides/sample_app_ug/ipsec_secgw.rst
@@ -506,6 +506,7 @@ The SA rule syntax is shown as follows:
 
     sa <dir> <spi> <cipher_algo> <cipher_key> <auth_algo> <auth_key>
     <mode> <src_ip> <dst_ip> <action_type> <port_id> <fallback>
+    <flow-direction> <port_id> <queue_id>
 
 where each options means:
 
@@ -698,6 +699,18 @@ where each options means:
 
    * *fallback lookaside-none*
 
+``<flow-direction>``
+
+ * Action type is for redirecting the specific inbound ipsec-flow to
+   a specified queue.
+
+ * Optional: Yes.
+
+ * Available options:
+
+   * *port_id*: Port ID of the NIC for which the SA is configured.
+   * *queue_id*: Queue ID to which traffic should be redirected.
+
 Example SA rules:
 
 .. code-block:: console
@@ -727,6 +740,9 @@ Example SA rules:
     mode ipv4-tunnel src 172.16.2.5 dst 172.16.1.5 \
     type inline-crypto-offload port_id 0
 
+    sa in 117 cipher_algo null auth_algo null mode ipv4-tunnel src 172.16.2.7 \
+    dst 172.16.1.7 flow-direction 0 2
+
 Routing rule syntax
 ^^^^^^^^^^^^^^^^^^^
 
diff --git a/examples/ipsec-secgw/ep0.cfg b/examples/ipsec-secgw/ep0.cfg
index dfd4aca7d..6f8d5aa53 100644
--- a/examples/ipsec-secgw/ep0.cfg
+++ b/examples/ipsec-secgw/ep0.cfg
@@ -29,6 +29,7 @@ sp ipv4 in esp protect 111 pri 1 dst 192.168.186.0/24 sport 0:65535 dport 0:6553
 sp ipv4 in esp protect 115 pri 1 dst 192.168.210.0/24 sport 0:65535 dport 0:65535
 sp ipv4 in esp protect 116 pri 1 dst 192.168.211.0/24 sport 0:65535 dport 0:65535
 sp ipv4 in esp protect 115 pri 1 dst 192.168.210.0/24 sport 0:65535 dport 0:65535
+sp ipv4 in esp protect 117 pri 1 dst 192.168.212.0/24 sport 0:65535 dport 0:65535
 sp ipv4 in esp protect 125 pri 1 dst 192.168.65.0/24 sport 0:65535 dport 0:65535
 sp ipv4 in esp protect 125 pri 1 dst 192.168.65.0/24 sport 0:65535 dport 0:65535
 sp ipv4 in esp protect 126 pri 1 dst 192.168.66.0/24 sport 0:65535 dport 0:65535
@@ -61,6 +62,8 @@ sp ipv6 in esp protect 125 pri 1 dst ffff:0000:0000:0000:aaaa:aaaa:0000:0000/96
 sport 0:65535 dport 0:65535
 sp ipv6 in esp protect 126 pri 1 dst ffff:0000:0000:0000:bbbb:bbbb:0000:0000/96 \
 sport 0:65535 dport 0:65535
+sp ipv6 in esp protect 127 pri 1 dst ffff:0000:0000:0000:cccc:dddd:0000:0000/96 \
+sport 0:65535 dport 0:65535
 
 #SA rules
 sa out 5 cipher_algo aes-128-cbc cipher_key 0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0 \
@@ -118,6 +121,9 @@ dst 172.16.1.5
 
 sa in 116 cipher_algo null auth_algo null mode ipv4-tunnel src 172.16.2.6 dst 172.16.1.6
 
+sa in 117 cipher_algo null auth_algo null mode ipv4-tunnel src 172.16.2.7 \
+dst 172.16.1.7 flow-direction 0 2
+
 sa in 125 cipher_algo aes-128-cbc cipher_key c3:c3:c3:c3:c3:c3:c3:c3:c3:c3:c3:\
 c3:c3:c3:c3:c3 auth_algo sha1-hmac auth_key c3:c3:c3:c3:c3:c3:c3:c3:c3:c3:c3:\
 c3:c3:c3:c3:c3:c3:c3:c3:c3 mode ipv6-tunnel \
@@ -130,6 +136,11 @@ sa in 126 cipher_algo aes-128-cbc cipher_key 4d:4d:4d:4d:4d:4d:4d:4d:4d:4d:4d:\
 src 2222:2222:2222:2222:2222:2222:2222:6666 \
 dst 1111:1111:1111:1111:1111:1111:1111:6666
 
+sa in 127 cipher_algo null auth_algo null mode ipv6-tunnel \
+src 2222:2222:2222:2222:2222:2222:2222:7777 \
+dst 1111:1111:1111:1111:1111:1111:1111:7777 \
+flow-direction 0 3
+
 #Routing rules
 rt ipv4 dst 172.16.2.5/32 port 0
 rt ipv4 dst 172.16.2.6/32 port 1
diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
index 5fde4f728..6d02341de 100644
--- a/examples/ipsec-secgw/ipsec-secgw.c
+++ b/examples/ipsec-secgw/ipsec-secgw.c
@@ -1183,6 +1183,28 @@ ipsec_poll_mode_worker(void)
 	}
 }
 
+int
+check_flow_params(uint16_t fdir_portid, uint8_t fdir_qid)
+{
+	uint16_t i;
+	uint16_t portid;
+	uint8_t queueid;
+
+	for (i = 0; i < nb_lcore_params; ++i) {
+		portid = lcore_params_array[i].port_id;
+		if (portid == fdir_portid) {
+			queueid = lcore_params_array[i].queue_id;
+			if (queueid == fdir_qid)
+				break;
+		}
+
+		if (i == nb_lcore_params - 1)
+			return -1;
+	}
+
+	return 1;
+}
+
 static int32_t
 check_poll_mode_params(struct eh_conf *eh_conf)
 {
diff --git a/examples/ipsec-secgw/ipsec.c b/examples/ipsec-secgw/ipsec.c
index d40657102..461fae461 100644
--- a/examples/ipsec-secgw/ipsec.c
+++ b/examples/ipsec-secgw/ipsec.c
@@ -418,6 +418,73 @@ create_inline_session(struct socket_ctx *skt_ctx, struct ipsec_sa *sa,
 	return 0;
 }
 
+int
+create_ipsec_esp_flow(struct ipsec_sa *sa)
+{
+	int ret = 0;
+	struct rte_flow_error err;
+	if (sa->direction == RTE_SECURITY_IPSEC_SA_DIR_EGRESS) {
+		RTE_LOG(ERR, IPSEC,
+			"No Flow director rule for Egress traffic\n");
+		return -1;
+	}
+	if (sa->flags == TRANSPORT) {
+		RTE_LOG(ERR, IPSEC,
+			"No Flow director rule for transport mode\n");
+		return -1;
+	}
+	sa->action[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
+	sa->pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
+	sa->action[0].conf =
+			&(struct rte_flow_action_queue){
+				.index = sa->fdir_qid,
+	};
+	sa->attr.egress = 0;
+	sa->attr.ingress = 1;
+	if (IS_IP6(sa->flags)) {
+		sa->pattern[1].mask = &rte_flow_item_ipv6_mask;
+		sa->pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV6;
+		sa->pattern[1].spec = &sa->ipv6_spec;
+		memcpy(sa->ipv6_spec.hdr.dst_addr,
+			sa->dst.ip.ip6.ip6_b, sizeof(sa->dst.ip.ip6.ip6_b));
+		memcpy(sa->ipv6_spec.hdr.src_addr,
+			sa->src.ip.ip6.ip6_b, sizeof(sa->src.ip.ip6.ip6_b));
+		sa->pattern[2].type = RTE_FLOW_ITEM_TYPE_ESP;
+		sa->pattern[2].spec = &sa->esp_spec;
+		sa->pattern[2].mask = &rte_flow_item_esp_mask;
+		sa->esp_spec.hdr.spi = rte_cpu_to_be_32(sa->spi);
+		sa->pattern[3].type = RTE_FLOW_ITEM_TYPE_END;
+	} else if (IS_IP4(sa->flags)) {
+		sa->pattern[1].mask = &rte_flow_item_ipv4_mask;
+		sa->pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV4;
+		sa->pattern[1].spec = &sa->ipv4_spec;
+		sa->ipv4_spec.hdr.dst_addr = sa->dst.ip.ip4;
+		sa->ipv4_spec.hdr.src_addr = sa->src.ip.ip4;
+		sa->pattern[2].type = RTE_FLOW_ITEM_TYPE_ESP;
+		sa->pattern[2].spec = &sa->esp_spec;
+		sa->pattern[2].mask = &rte_flow_item_esp_mask;
+		sa->esp_spec.hdr.spi = rte_cpu_to_be_32(sa->spi);
+		sa->pattern[3].type = RTE_FLOW_ITEM_TYPE_END;
+	}
+	sa->action[1].type = RTE_FLOW_ACTION_TYPE_END;
+
+	ret = rte_flow_validate(sa->portid, &sa->attr, sa->pattern, sa->action,
+				&err);
+	if (ret < 0) {
+		RTE_LOG(ERR, IPSEC, "Flow validation failed %s\n", err.message);
+		return ret;
+	}
+
+	sa->flow = rte_flow_create(sa->portid, &sa->attr, sa->pattern,
+					sa->action, &err);
+	if (!sa->flow) {
+		RTE_LOG(ERR, IPSEC, "Flow creation failed %s\n", err.message);
+		return -1;
+	}
+
+	return 0;
+}
+
 /*
  * queue crypto-ops into PMD queue.
  */
diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
index f8f29f9b1..1790a93ca 100644
--- a/examples/ipsec-secgw/ipsec.h
+++ b/examples/ipsec-secgw/ipsec.h
@@ -144,6 +144,8 @@ struct ipsec_sa {
 	};
 	enum rte_security_ipsec_sa_direction direction;
 	uint16_t portid;
+	uint8_t fdir_qid;
+	uint8_t fdir_flag;
 
 #define MAX_RTE_FLOW_PATTERN (4)
 #define MAX_RTE_FLOW_ACTIONS (3)
@@ -408,5 +410,10 @@ create_lookaside_session(struct ipsec_ctx *ipsec_ctx, struct ipsec_sa *sa,
 int
 create_inline_session(struct socket_ctx *skt_ctx, struct ipsec_sa *sa,
 		struct rte_ipsec_session *ips);
+int
+check_flow_params(uint16_t fdir_portid, uint8_t fdir_qid);
+
+int
+create_ipsec_esp_flow(struct ipsec_sa *sa);
 
 #endif /* __IPSEC_H__ */
diff --git a/examples/ipsec-secgw/sa.c b/examples/ipsec-secgw/sa.c
index a6bf5e8b1..7ed68fb93 100644
--- a/examples/ipsec-secgw/sa.c
+++ b/examples/ipsec-secgw/sa.c
@@ -271,6 +271,7 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
 	uint32_t type_p = 0;
 	uint32_t portid_p = 0;
 	uint32_t fallback_p = 0;
+	int16_t status_p = 0;
 
 	if (strcmp(tokens[0], "in") == 0) {
 		ri = &nb_sa_in;
@@ -295,6 +296,7 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
 	if (atoi(tokens[1]) == INVALID_SPI)
 		return;
 	rule->spi = atoi(tokens[1]);
+	rule->portid = UINT16_MAX;
 	ips = ipsec_get_primary_session(rule);
 
 	for (ti = 2; ti < n_tokens; ti++) {
@@ -636,9 +638,14 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
 			INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 			if (status->status < 0)
 				return;
-			rule->portid = atoi(tokens[ti]);
-			if (status->status < 0)
+			if (rule->portid == UINT16_MAX)
+				rule->portid = atoi(tokens[ti]);
+			else if (rule->portid != atoi(tokens[ti])) {
+				APP_CHECK(0, status, "portid %s not matching "
+					"with already assigned portid %u",
+					tokens[ti], rule->portid);
 				return;
+			}
 			portid_p = 1;
 			continue;
 		}
@@ -683,6 +690,44 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
 			fallback_p = 1;
 			continue;
 		}
+		if (strcmp(tokens[ti], "flow-direction") == 0) {
+			if (ips->type ==
+				RTE_SECURITY_ACTION_TYPE_NONE ||
+				ips->type ==
+				RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO) {
+				printf("flow director supported for security "
+					"session type:%d\n", ips->type);
+			} else {
+				APP_CHECK(0, status, "flow director not "
+					"supported for security session "
+					"type:%d", ips->type);
+				return;
+			}
+			rule->fdir_flag = 1;
+			INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
+			if (status->status < 0)
+				return;
+			if (rule->portid == UINT16_MAX)
+				rule->portid = atoi(tokens[ti]);
+			else if (rule->portid != atoi(tokens[ti])) {
+				APP_CHECK(0, status, "portid %s "
+					"not matching with already assigned "
+					"portid %u", tokens[ti], rule->portid);
+				return;
+			}
+			INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
+			if (status->status < 0)
+				return;
+			rule->fdir_qid = atoi(tokens[ti]);
+			/* validating portid and queueid */
+			status_p = check_flow_params(rule->portid,
+					rule->fdir_qid);
+			if (status_p < 0) {
+				printf("port id %u / queue id %u is not valid\n",
+					rule->portid, rule->fdir_qid);
+			}
+			continue;
+		}
 
 		/* unrecognizeable input */
 		APP_CHECK(0, status, "unrecognized input \"%s\"",
@@ -721,7 +766,6 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
 	if (!type_p || (!portid_p && ips->type !=
 			RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO)) {
 		ips->type = RTE_SECURITY_ACTION_TYPE_NONE;
-		rule->portid = -1;
 	}
 
 	*ri = *ri + 1;
@@ -825,6 +869,10 @@ print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
 			break;
 		}
 	}
+	if (sa->fdir_flag == 1)
+		printf("flow-direction port %d queue %d", sa->portid,
+				sa->fdir_qid);
+
 	printf("\n");
 }
 
@@ -1143,6 +1191,13 @@ sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 			}
 		}
 
+		if (sa->fdir_flag && inbound) {
+			rc = create_ipsec_esp_flow(sa);
+			if (rc != 0)
+				RTE_LOG(ERR, IPSEC_ESP,
+					"create_ipsec_esp_flow() failed %s\n",
+					strerror(rc));
+		}
 		print_one_sa_rule(sa, inbound);
 	}
 
-- 
2.17.1