[PATCH v1 5/7] ethdev: add GENEVE TLV option modification support

[Michael Baum <michaelba@nvidia.com>]

Add modify field support for GENEVE option fields:
 - "RTE_FLOW_FIELD_GENEVE_OPT_TYPE"
 - "RTE_FLOW_FIELD_GENEVE_OPT_CLASS"
 - "RTE_FLOW_FIELD_GENEVE_OPT_DATA"

Each GENEVE TLV option is identified by both its "class" and "type", so
2 new fields were added to "rte_flow_action_modify_data" structure to
help specify which option to modify.

To get room for those 2 new fields, the "level" field move to use
"uint8_t" which is more than enough for encapsulation level.

Signed-off-by: Michael Baum <michaelba@nvidia.com>
---
 app/test-pmd/cmdline_flow.c            | 48 +++++++++++++++++++++++-
 doc/guides/prog_guide/rte_flow.rst     | 12 ++++++
 doc/guides/rel_notes/release_23_07.rst |  3 ++
 lib/ethdev/rte_flow.h                  | 51 +++++++++++++++++++++++++-
 4 files changed, 112 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index 58939ec321..8c1dea53c0 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -636,11 +636,15 @@ enum index {
 	ACTION_MODIFY_FIELD_DST_TYPE_VALUE,
 	ACTION_MODIFY_FIELD_DST_LEVEL,
 	ACTION_MODIFY_FIELD_DST_LEVEL_VALUE,
+	ACTION_MODIFY_FIELD_DST_TYPE_ID,
+	ACTION_MODIFY_FIELD_DST_CLASS_ID,
 	ACTION_MODIFY_FIELD_DST_OFFSET,
 	ACTION_MODIFY_FIELD_SRC_TYPE,
 	ACTION_MODIFY_FIELD_SRC_TYPE_VALUE,
 	ACTION_MODIFY_FIELD_SRC_LEVEL,
 	ACTION_MODIFY_FIELD_SRC_LEVEL_VALUE,
+	ACTION_MODIFY_FIELD_SRC_TYPE_ID,
+	ACTION_MODIFY_FIELD_SRC_CLASS_ID,
 	ACTION_MODIFY_FIELD_SRC_OFFSET,
 	ACTION_MODIFY_FIELD_SRC_VALUE,
 	ACTION_MODIFY_FIELD_SRC_POINTER,
@@ -854,7 +858,9 @@ static const char *const modify_field_ids[] = {
 	"ipv4_ecn", "ipv6_ecn", "gtp_psc_qfi", "meter_color",
 	"ipv6_proto",
 	"flex_item",
-	"hash_result", NULL
+	"hash_result",
+	"geneve_opt_type", "geneve_opt_class", "geneve_opt_data",
+	NULL
 };
 
 static const char *const meter_colors[] = {
@@ -2295,6 +2301,8 @@ static const enum index next_action_sample[] = {
 
 static const enum index action_modify_field_dst[] = {
 	ACTION_MODIFY_FIELD_DST_LEVEL,
+	ACTION_MODIFY_FIELD_DST_TYPE_ID,
+	ACTION_MODIFY_FIELD_DST_CLASS_ID,
 	ACTION_MODIFY_FIELD_DST_OFFSET,
 	ACTION_MODIFY_FIELD_SRC_TYPE,
 	ZERO,
@@ -2302,6 +2310,8 @@ static const enum index action_modify_field_dst[] = {
 
 static const enum index action_modify_field_src[] = {
 	ACTION_MODIFY_FIELD_SRC_LEVEL,
+	ACTION_MODIFY_FIELD_SRC_TYPE_ID,
+	ACTION_MODIFY_FIELD_SRC_CLASS_ID,
 	ACTION_MODIFY_FIELD_SRC_OFFSET,
 	ACTION_MODIFY_FIELD_SRC_VALUE,
 	ACTION_MODIFY_FIELD_SRC_POINTER,
@@ -6388,6 +6398,24 @@ static const struct token token_list[] = {
 		.call = parse_vc_modify_field_level,
 		.comp = comp_none,
 	},
+	[ACTION_MODIFY_FIELD_DST_TYPE_ID] = {
+		.name = "dst_type_id",
+		.help = "destination field type ID",
+		.next = NEXT(action_modify_field_dst,
+			     NEXT_ENTRY(COMMON_UNSIGNED)),
+		.args = ARGS(ARGS_ENTRY(struct rte_flow_action_modify_field,
+					dst.type)),
+		.call = parse_vc_conf,
+	},
+	[ACTION_MODIFY_FIELD_DST_CLASS_ID] = {
+		.name = "dst_class",
+		.help = "destination field class ID",
+		.next = NEXT(action_modify_field_dst,
+			     NEXT_ENTRY(COMMON_UNSIGNED)),
+		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_action_modify_field,
+					     dst.class_id)),
+		.call = parse_vc_conf,
+	},
 	[ACTION_MODIFY_FIELD_DST_OFFSET] = {
 		.name = "dst_offset",
 		.help = "destination field bit offset",
@@ -6423,6 +6451,24 @@ static const struct token token_list[] = {
 		.call = parse_vc_modify_field_level,
 		.comp = comp_none,
 	},
+	[ACTION_MODIFY_FIELD_SRC_TYPE_ID] = {
+		.name = "src_type_id",
+		.help = "source field type ID",
+		.next = NEXT(action_modify_field_src,
+			     NEXT_ENTRY(COMMON_UNSIGNED)),
+		.args = ARGS(ARGS_ENTRY(struct rte_flow_action_modify_field,
+					src.type)),
+		.call = parse_vc_conf,
+	},
+	[ACTION_MODIFY_FIELD_SRC_CLASS_ID] = {
+		.name = "src_class",
+		.help = "source field class ID",
+		.next = NEXT(action_modify_field_src,
+			     NEXT_ENTRY(COMMON_UNSIGNED)),
+		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_action_modify_field,
+					     src.class_id)),
+		.call = parse_vc_conf,
+	},
 	[ACTION_MODIFY_FIELD_SRC_OFFSET] = {
 		.name = "src_offset",
 		.help = "source field bit offset",
diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index 25b57bf86d..cd38f0de46 100644
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -2937,6 +2937,14 @@ as well as any tag element in the tag array:
 For the tag array (in case of multiple tags are supported and present)
 ``level`` translates directly into the array index.
 
+``type`` is used to specify (along with ``class_id``) the Geneve option which
+is being modified.
+This field is relevant only for ``RTE_FLOW_FIELD_GENEVE_OPT_XXXX`` type.
+
+``class_id`` is used to specify (along with ``type``) the Geneve option which
+is being modified.
+This field is relevant only for ``RTE_FLOW_FIELD_GENEVE_OPT_XXXX`` type.
+
 ``flex_handle`` is used to specify the flex item pointer which is being
 modified. ``flex_handle`` and ``level`` are mutually exclusive.
 
@@ -2994,6 +3002,10 @@ value as sequence of bytes {xxx, xxx, 0x85, xxx, xxx, xxx}.
    +-----------------+----------------------------------------------------------+
    | ``level``       | encapsulation level of a packet field or tag array index |
    +-----------------+----------------------------------------------------------+
+   | ``type``        | geneve option type                                       |
+   +-----------------+----------------------------------------------------------+
+   | ``class_id``    | geneve option class ID                                   |
+   +-----------------+----------------------------------------------------------+
    | ``flex_handle`` | flex item handle of a packet field                       |
    +-----------------+----------------------------------------------------------+
    | ``offset``      | number of bits to skip at the beginning                  |
diff --git a/doc/guides/rel_notes/release_23_07.rst b/doc/guides/rel_notes/release_23_07.rst
index a9b1293689..ce1755096f 100644
--- a/doc/guides/rel_notes/release_23_07.rst
+++ b/doc/guides/rel_notes/release_23_07.rst
@@ -84,6 +84,9 @@ API Changes
    Also, make sure to start the actual text at the margin.
    =======================================================
 
+* The ``level`` field in experimental structure
+  ``struct rte_flow_action_modify_data`` was reduced to 8 bits.
+
 
 ABI Changes
 -----------
diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
index 713ba8b65c..b82eb0c0a8 100644
--- a/lib/ethdev/rte_flow.h
+++ b/lib/ethdev/rte_flow.h
@@ -3773,6 +3773,9 @@ enum rte_flow_field_id {
 	RTE_FLOW_FIELD_IPV6_PROTO,	/**< IPv6 next header. */
 	RTE_FLOW_FIELD_FLEX_ITEM,	/**< Flex item. */
 	RTE_FLOW_FIELD_HASH_RESULT,	/**< Hash result. */
+	RTE_FLOW_FIELD_GENEVE_OPT_TYPE,	/**< GENEVE option type */
+	RTE_FLOW_FIELD_GENEVE_OPT_CLASS,/**< GENEVE option class */
+	RTE_FLOW_FIELD_GENEVE_OPT_DATA	/**< GENEVE option data */
 };
 
 /**
@@ -3788,7 +3791,53 @@ struct rte_flow_action_modify_data {
 		struct {
 			/** Encapsulation level or tag index or flex item handle. */
 			union {
-				uint32_t level;
+				struct {
+					/**
+					 * Packet encapsulation level containing
+					 * the field modify to.
+					 *
+					 * - @p 0 requests the default behavior.
+					 *   Depending on the packet type, it
+					 *   can mean outermost, innermost or
+					 *   anything in between.
+					 *
+					 *   It basically stands for the
+					 *   innermost encapsulation level
+					 *   modification can be performed on
+					 *   according to PMD and device
+					 *   capabilities.
+					 *
+					 * - @p 1 requests modification to be
+					 *   performed on the outermost packet
+					 *   encapsulation level.
+					 *
+					 * - @p 2 and subsequent values request
+					 *   modification to be performed on
+					 *   the specified inner packet
+					 *   encapsulation level, from
+					 *   outermost to innermost (lower to
+					 *   higher values).
+					 *
+					 * Values other than @p 0 are not
+					 * necessarily supported.
+					 *
+					 * For RTE_FLOW_FIELD_TAG it represents
+					 * the tag element in the tag array.
+					 */
+					uint8_t level;
+					/**
+					 * Geneve option type. relevant only
+					 * for RTE_FLOW_FIELD_GENEVE_OPT_XXXX
+					 * modification type.
+					 */
+					uint8_t type;
+					/**
+					 * Geneve option class. relevant only
+					 * for RTE_FLOW_FIELD_GENEVE_OPT_XXXX
+					 * modification type.
+					 */
+					rte_be16_t class_id;
+				};
 				struct rte_flow_item_flex_handle *flex_handle;
 			};
 			/** Number of bits to skip from a field. */
-- 
2.25.1