[dpdk-stable] [PATCH 19.11 07/11] net/mlx5: fix layer type in header modify action

[Suanming Mou]

[ upstream commit 04233f36c712ea35fe0f1d02c5c6f323a28ec588 ]

Currently, for header modify actions after tunnel decapsulation, the
header modify actions will still select the old outermost layer type.
It will cause header modify actions get the wrong layer type.

Add the tunnel decap flag to indicate the layer type to get for header
modify actions.

Fixes: 4bb14c83df95 ("net/mlx5: support modify header using Direct Verbs")

Signed-off-by: Suanming Mou <suanmingm at mellanox.com>
Acked-by: Matan Azrad <matan at mellanox.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 68 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 57 insertions(+), 11 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 3362873..4df0fc2 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -82,19 +82,55 @@
  *   Pointer to item specification.
  * @param[out] attr
  *   Pointer to flow attributes structure.
+ * @param[in] tunnel_decap
+ *   Whether action is after tunnel decapsulation.
  */
 static void
-flow_dv_attr_init(const struct rte_flow_item *item, union flow_dv_attr *attr)
+flow_dv_attr_init(const struct rte_flow_item *item, union flow_dv_attr *attr,
+		  bool tunnel_decap)
 {
 	for (; item->type != RTE_FLOW_ITEM_TYPE_END; item++) {
+		uint8_t next_protocol = 0xff;
+
 		switch (item->type) {
+		case RTE_FLOW_ITEM_TYPE_GRE:
+		case RTE_FLOW_ITEM_TYPE_NVGRE:
+		case RTE_FLOW_ITEM_TYPE_VXLAN:
+		case RTE_FLOW_ITEM_TYPE_VXLAN_GPE:
+		case RTE_FLOW_ITEM_TYPE_GENEVE:
+		case RTE_FLOW_ITEM_TYPE_MPLS:
+			if (tunnel_decap)
+				attr->attr = 0;
+			break;
 		case RTE_FLOW_ITEM_TYPE_IPV4:
 			if (!attr->ipv6)
 				attr->ipv4 = 1;
+			if (item->mask != NULL &&
+			    ((const struct rte_flow_item_ipv4 *)
+			    item->mask)->hdr.next_proto_id)
+				next_protocol =
+				    ((const struct rte_flow_item_ipv4 *)
+				      (item->spec))->hdr.next_proto_id &
+				    ((const struct rte_flow_item_ipv4 *)
+				      (item->mask))->hdr.next_proto_id;
+			if ((next_protocol == IPPROTO_IPIP ||
+			    next_protocol == IPPROTO_IPV6) && tunnel_decap)
+				attr->attr = 0;
 			break;
 		case RTE_FLOW_ITEM_TYPE_IPV6:
 			if (!attr->ipv4)
 				attr->ipv6 = 1;
+			if (item->mask != NULL &&
+			    ((const struct rte_flow_item_ipv6 *)
+			    item->mask)->hdr.proto)
+				next_protocol =
+				    ((const struct rte_flow_item_ipv6 *)
+				      (item->spec))->hdr.proto &
+				    ((const struct rte_flow_item_ipv6 *)
+				      (item->mask))->hdr.proto;
+			if ((next_protocol == IPPROTO_IPIP ||
+			    next_protocol == IPPROTO_IPV6) && tunnel_decap)
+				attr->attr = 0;
 			break;
 		case RTE_FLOW_ITEM_TYPE_UDP:
 			if (!attr->tcp)
@@ -599,6 +635,8 @@ struct field_modify_info modify_tcp[] = {
  *   Pointer to rte_flow_item objects list.
  * @param[in] attr
  *   Pointer to flow attributes structure.
+ * @param[in] tunnel_decap
+ *   Whether action is after tunnel decapsulation.
  * @param[out] error
  *   Pointer to the error structure.
  *
@@ -610,7 +648,7 @@ struct field_modify_info modify_tcp[] = {
 			(struct mlx5_flow_dv_modify_hdr_resource *resource,
 			 const struct rte_flow_action *action,
 			 const struct rte_flow_item *items,
-			 union flow_dv_attr *attr,
+			 union flow_dv_attr *attr, bool tunnel_decap,
 			 struct rte_flow_error *error)
 {
 	const struct rte_flow_action_set_tp *conf =
@@ -623,7 +661,7 @@ struct field_modify_info modify_tcp[] = {
 	struct field_modify_info *field;
 
 	if (!attr->valid)
-		flow_dv_attr_init(items, attr);
+		flow_dv_attr_init(items, attr, tunnel_decap);
 	if (attr->udp) {
 		memset(&udp, 0, sizeof(udp));
 		memset(&udp_mask, 0, sizeof(udp_mask));
@@ -673,6 +711,8 @@ struct field_modify_info modify_tcp[] = {
  *   Pointer to rte_flow_item objects list.
  * @param[in] attr
  *   Pointer to flow attributes structure.
+ * @param[in] tunnel_decap
+ *   Whether action is after tunnel decapsulation.
  * @param[out] error
  *   Pointer to the error structure.
  *
@@ -684,7 +724,7 @@ struct field_modify_info modify_tcp[] = {
 			(struct mlx5_flow_dv_modify_hdr_resource *resource,
 			 const struct rte_flow_action *action,
 			 const struct rte_flow_item *items,
-			 union flow_dv_attr *attr,
+			 union flow_dv_attr *attr, bool tunnel_decap,
 			 struct rte_flow_error *error)
 {
 	const struct rte_flow_action_set_ttl *conf =
@@ -697,7 +737,7 @@ struct field_modify_info modify_tcp[] = {
 	struct field_modify_info *field;
 
 	if (!attr->valid)
-		flow_dv_attr_init(items, attr);
+		flow_dv_attr_init(items, attr, tunnel_decap);
 	if (attr->ipv4) {
 		memset(&ipv4, 0, sizeof(ipv4));
 		memset(&ipv4_mask, 0, sizeof(ipv4_mask));
@@ -733,6 +773,8 @@ struct field_modify_info modify_tcp[] = {
  *   Pointer to rte_flow_item objects list.
  * @param[in] attr
  *   Pointer to flow attributes structure.
+ * @param[in] tunnel_decap
+ *   Whether action is after tunnel decapsulation.
  * @param[out] error
  *   Pointer to the error structure.
  *
@@ -743,7 +785,7 @@ struct field_modify_info modify_tcp[] = {
 flow_dv_convert_action_modify_dec_ttl
 			(struct mlx5_flow_dv_modify_hdr_resource *resource,
 			 const struct rte_flow_item *items,
-			 union flow_dv_attr *attr,
+			 union flow_dv_attr *attr, bool tunnel_decap,
 			 struct rte_flow_error *error)
 {
 	struct rte_flow_item item;
@@ -754,7 +796,7 @@ struct field_modify_info modify_tcp[] = {
 	struct field_modify_info *field;
 
 	if (!attr->valid)
-		flow_dv_attr_init(items, attr);
+		flow_dv_attr_init(items, attr, tunnel_decap);
 	if (attr->ipv4) {
 		memset(&ipv4, 0, sizeof(ipv4));
 		memset(&ipv4_mask, 0, sizeof(ipv4_mask));
@@ -7130,7 +7172,8 @@ struct field_modify_info modify_tcp[] = {
 		case RTE_FLOW_ACTION_TYPE_SET_TP_DST:
 			if (flow_dv_convert_action_modify_tp
 					(mhdr_res, actions, items,
-					 &flow_attr, error))
+					 &flow_attr, !!(action_flags &
+					 MLX5_FLOW_ACTION_DECAP), error))
 				return -rte_errno;
 			action_flags |= actions->type ==
 					RTE_FLOW_ACTION_TYPE_SET_TP_SRC ?
@@ -7139,14 +7182,17 @@ struct field_modify_info modify_tcp[] = {
 			break;
 		case RTE_FLOW_ACTION_TYPE_DEC_TTL:
 			if (flow_dv_convert_action_modify_dec_ttl
-					(mhdr_res, items, &flow_attr, error))
+					(mhdr_res, items, &flow_attr,
+					 !!(action_flags &
+					 MLX5_FLOW_ACTION_DECAP), error))
 				return -rte_errno;
 			action_flags |= MLX5_FLOW_ACTION_DEC_TTL;
 			break;
 		case RTE_FLOW_ACTION_TYPE_SET_TTL:
 			if (flow_dv_convert_action_modify_ttl
-					(mhdr_res, actions, items,
-					 &flow_attr, error))
+					(mhdr_res, actions, items, &flow_attr,
+					 !!(action_flags &
+					 MLX5_FLOW_ACTION_DECAP), error))
 				return -rte_errno;
 			action_flags |= MLX5_FLOW_ACTION_SET_TTL;
 			break;
-- 
1.8.3.1