ethdev: support L2TPv2 and PPP procotol

Added flow pattern items and header formats of L2TPv2 and PPP.

Signed-off-by: Wenjun Wu <wenjun1.wu@intel.com>
Signed-off-by: Jie Wang <jie1x.wang@intel.com>
Acked-by: Ori Kam <orika@nvidia.com>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

doc/api/doxy-api-index.md

@@ -121,7 +121,9 @@ The public API headers are grouped by topics:
   [MPLS]               (@ref rte_mpls.h),
   [VXLAN]              (@ref rte_vxlan.h),
   [Geneve]             (@ref rte_geneve.h),
-  [eCPRI]              (@ref rte_ecpri.h)
+  [eCPRI]              (@ref rte_ecpri.h),
+  [L2TPv2]             (@ref rte_l2tpv2.h),
+  [PPP]                (@ref rte_ppp.h)
 
 - **QoS**:
   [metering]           (@ref rte_meter.h),

doc/guides/nics/features/default.ini

@@ -110,6 +110,7 @@ ipv4                 =
 ipv6                 =
 ipv6_ext             =
 ipv6_frag_ext        =
+l2tpv2               =
 l2tpv3oip            =
 mark                 =
 meta                 =
@@ -121,6 +122,7 @@ pfcp                 =
 phy_port             =
 port_id              =
 port_representor     =
+ppp                  =
 pppoed               =
 pppoes               =
 pppoe_proto_id       =

doc/guides/prog_guide/rte_flow.rst

@@ -1573,6 +1573,31 @@ rte_flow_flex_item_create() routine.
   as padded with trailing zeroes up to full configured length, both for
   value and mask.
 
+Item: ``L2TPV2``
+^^^^^^^^^^^^^^^^^^^
+
+Matches a L2TPv2 header.
+
+- ``flags_version``: flags(12b), version(4b).
+- ``length``: total length of the message.
+- ``tunnel_id``: identifier for the control connection.
+- ``session_id``: identifier for a session within a tunnel.
+- ``ns``: sequence number for this date or control message.
+- ``nr``: sequence number expected in the next control message to be received.
+- ``offset_size``: offset of payload data.
+- ``offset_padding``: offset padding, variable length.
+- Default ``mask`` matches flags_version only.
+
+Item: ``PPP``
+^^^^^^^^^^^^^^^^^^^
+
+Matches a PPP header.
+
+- ``addr``: PPP address.
+- ``ctrl``: PPP control.
+- ``proto_id``: PPP protocol identifier.
+- Default ``mask`` matches addr, ctrl, proto_id.
+
 Actions
 ~~~~~~~
 

doc/guides/rel_notes/release_21_11.rst

@@ -96,6 +96,10 @@ New Features
   Added macros ETH_RSS_IPV4_CHKSUM and ETH_RSS_L4_CHKSUM, now IPv4 and
   TCP/UDP/SCTP header checksum field can be used as input set for RSS.
 
+* **Added L2TPv2 and PPP protocol support in flow API.**
+
+  Added flow pattern items and header formats of L2TPv2 and PPP protocol.
+
 * **Added flow flex item.**
 
   The configurable flow flex item provides the capability to introduce

lib/ethdev/rte_flow.c

@@ -156,6 +156,8 @@ static const struct rte_flow_desc_data rte_flow_desc_item[] = {
 	MK_FLOW_ITEM(REPRESENTED_PORT, sizeof(struct rte_flow_item_ethdev)),
 	MK_FLOW_ITEM_FN(FLEX, sizeof(struct rte_flow_item_flex),
 			rte_flow_item_flex_conv),
+	MK_FLOW_ITEM(L2TPV2, sizeof(struct rte_flow_item_l2tpv2)),
+	MK_FLOW_ITEM(PPP, sizeof(struct rte_flow_item_ppp)),
 };
 
 /** Generate flow_action[] entry. */

lib/ethdev/rte_flow.h

@@ -35,6 +35,8 @@
 #include <rte_mbuf_dyn.h>
 #include <rte_meter.h>
 #include <rte_gtp.h>
+#include <rte_l2tpv2.h>
+#include <rte_ppp.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -644,6 +646,20 @@ enum rte_flow_item_type {
 	 * @see struct rte_flow_item_flex.
 	 */
 	RTE_FLOW_ITEM_TYPE_FLEX,
+
+	/**
+	 * Matches L2TPv2 Header.
+	 *
+	 * See struct rte_flow_item_l2tpv2.
+	 */
+	RTE_FLOW_ITEM_TYPE_L2TPV2,
+
+	/**
+	 * Matches PPP Header.
+	 *
+	 * See struct rte_flow_item_ppp.
+	 */
+	RTE_FLOW_ITEM_TYPE_PPP,
 };
 
 /**
@@ -1900,6 +1916,57 @@ static const struct rte_flow_item_ethdev rte_flow_item_ethdev_mask = {
 };
 #endif
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * RTE_FLOW_ITEM_TYPE_L2TPV2
+ *
+ * Matches L2TPv2 Header
+ */
+struct rte_flow_item_l2tpv2 {
+	struct rte_l2tpv2_combined_msg_hdr hdr;
+};
+
+/** Default mask for RTE_FLOW_ITEM_TYPE_L2TPV2. */
+#ifndef __cplusplus
+static const struct rte_flow_item_l2tpv2 rte_flow_item_l2tpv2_mask = {
+	/*
+	 * flags and version bit mask
+	 * 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
+	 * T L x x S x O P x x x x V V V V
+	 */
+	.hdr = {
+		.common = {
+			.flags_version = RTE_BE16(0xcb0f),
+		},
+	},
+};
+#endif
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * RTE_FLOW_ITEM_TYPE_PPP
+ *
+ * Matches PPP Header
+ */
+struct rte_flow_item_ppp {
+	struct rte_ppp_hdr hdr;
+};
+
+/** Default mask for RTE_FLOW_ITEM_TYPE_PPP. */
+#ifndef __cplusplus
+static const struct rte_flow_item_ppp rte_flow_item_ppp_mask = {
+	.hdr = {
+		.addr = 0xff,
+		.ctrl = 0xff,
+		.proto_id = RTE_BE16(0xffff),
+	}
+};
+#endif
+
 /**
  * Matching pattern item definition.
  *

lib/net/meson.build

@@ -19,6 +19,8 @@ headers = files(
         'rte_higig.h',
         'rte_ecpri.h',
         'rte_geneve.h',
+        'rte_l2tpv2.h',
+        'rte_ppp.h',
 )
 
 sources = files(