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From: Michael Baum <michaelba@nvidia.com>
To: <dev@dpdk.org>
CC: Ori Kam <orika@nvidia.com>, Dariusz Sosnowski <dsosnowski@nvidia.com>,
Aman Singh <aman.deep.singh@intel.com>, Yuying Zhang
<yuying.zhang@intel.com>, Ferruh Yigit <ferruh.yigit@amd.com>, "Thomas
Monjalon" <thomas@monjalon.net>
Subject: [PATCH v4 1/2] ethdev: add random item support
Date: Thu, 14 Dec 2023 12:58:43 +0200
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Add support for a new item type "RTE_FLOW_ITEM_TYPE_RANDOM".
This item enables to match on some random value as a part of flow rule.
Signed-off-by: Michael Baum <michaelba@nvidia.com>
---
doc/guides/nics/features/default.ini | 1 +
doc/guides/prog_guide/rte_flow.rst | 14 +++++++++++
doc/guides/rel_notes/release_24_03.rst | 5 ++++
lib/ethdev/rte_flow.c | 1 +
lib/ethdev/rte_flow.h | 35 +++++++++++++++++++++++++-
5 files changed, 55 insertions(+), 1 deletion(-)
diff --git a/doc/guides/nics/features/default.ini b/doc/guides/nics/features/default.ini
index 806cb033ff..6d50236292 100644
--- a/doc/guides/nics/features/default.ini
+++ b/doc/guides/nics/features/default.ini
@@ -140,6 +140,7 @@ pppoe_proto_id =
ptype =
quota =
raw =
+random =
represented_port =
sctp =
tag =
diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index 627b845bfb..900fdaefb6 100644
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -1573,6 +1573,20 @@ Matches the packet type as defined in rte_mbuf_ptype.
- ``packet_type``: L2/L3/L4 and tunnel information.
+Item: ``RANDOM``
+^^^^^^^^^^^^^^^^
+
+Matches a random value.
+
+A random unsigned integer (at most 32-bit) is generated for each packet during
+flow rule processing, by either HW, SW or some external source.
+Application can match on either exact value or range of values.
+This value is not based on the packet data/headers.
+Application shouldn't assume that this value is kept during the lifetime of
+the packet.
+
+- ``value``: Specific value to match.
+
Actions
~~~~~~~
diff --git a/doc/guides/rel_notes/release_24_03.rst b/doc/guides/rel_notes/release_24_03.rst
index 6f8ad27808..819cef7f20 100644
--- a/doc/guides/rel_notes/release_24_03.rst
+++ b/doc/guides/rel_notes/release_24_03.rst
@@ -55,6 +55,11 @@ New Features
Also, make sure to start the actual text at the margin.
=======================================================
+* **Added flow matching of random value.**
+
+ * Added ``RTE_FLOW_ITEM_TYPE_RANDOM`` to match random value.
+ * Added ``RTE_FLOW_FIELD_RANDOM`` to represent it in field API.
+
Removed Items
-------------
diff --git a/lib/ethdev/rte_flow.c b/lib/ethdev/rte_flow.c
index 549e329558..090b936ca9 100644
--- a/lib/ethdev/rte_flow.c
+++ b/lib/ethdev/rte_flow.c
@@ -136,6 +136,7 @@ static const struct rte_flow_desc_data rte_flow_desc_item[] = {
sizeof(struct rte_flow_item_icmp6_nd_opt_tla_eth)),
MK_FLOW_ITEM(MARK, sizeof(struct rte_flow_item_mark)),
MK_FLOW_ITEM(META, sizeof(struct rte_flow_item_meta)),
+ MK_FLOW_ITEM(RANDOM, sizeof(struct rte_flow_item_random)),
MK_FLOW_ITEM(TAG, sizeof(struct rte_flow_item_tag)),
MK_FLOW_ITEM(GRE_KEY, sizeof(rte_be32_t)),
MK_FLOW_ITEM(GRE_OPTION, sizeof(struct rte_flow_item_gre_opt)),
diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
index affdc8121b..860b100e45 100644
--- a/lib/ethdev/rte_flow.h
+++ b/lib/ethdev/rte_flow.h
@@ -704,6 +704,19 @@ enum rte_flow_item_type {
*
*/
RTE_FLOW_ITEM_TYPE_PTYPE,
+
+ /**
+ * [META]
+ *
+ * Matches a random value.
+ *
+ * This value is not based on the packet data/headers.
+ * Application shouldn't assume that this value is kept during the
+ * lifetime of the packet.
+ *
+ * @see struct rte_flow_item_random.
+ */
+ RTE_FLOW_ITEM_TYPE_RANDOM,
};
/**
@@ -2047,6 +2060,25 @@ static const struct rte_flow_item_ib_bth rte_flow_item_ib_bth_mask = {
};
#endif
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * RTE_FLOW_ITEM_TYPE_RANDOM
+ *
+ * Matches a random value.
+ */
+struct rte_flow_item_random {
+ uint32_t value;
+};
+
+/** Default mask for RTE_FLOW_ITEM_TYPE_RANDOM. */
+#ifndef __cplusplus
+static const struct rte_flow_item_random rte_flow_item_random_mask = {
+ .value = UINT32_MAX,
+};
+#endif
+
/**
* Matching pattern item definition.
*
@@ -3903,7 +3935,8 @@ enum rte_flow_field_id {
RTE_FLOW_FIELD_TCP_DATA_OFFSET, /**< TCP data offset. */
RTE_FLOW_FIELD_IPV4_IHL, /**< IPv4 IHL. */
RTE_FLOW_FIELD_IPV4_TOTAL_LEN, /**< IPv4 total length. */
- RTE_FLOW_FIELD_IPV6_PAYLOAD_LEN /**< IPv6 payload length. */
+ RTE_FLOW_FIELD_IPV6_PAYLOAD_LEN,/**< IPv6 payload length. */
+ RTE_FLOW_FIELD_RANDOM /**< Random value. */
};
/**
--
2.25.1