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From: Rongwei Liu <rongweil@nvidia.com>
To: <matan@nvidia.com>, <viacheslavo@nvidia.com>, <orika@nvidia.com>,
<thomas@monjalon.net>, Ferruh Yigit <ferruh.yigit@amd.com>, Andrew Rybchenko
<andrew.rybchenko@oktetlabs.ru>, Olivier Matz <olivier.matz@6wind.com>
CC: <dev@dpdk.org>, <rasland@nvidia.com>
Subject: [RFC 1/9] ethdev: add IPv6 routing extension header definition
Date: Wed, 21 Dec 2022 10:42:56 +0200
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Add IPv6 routing extension header definition and no
TLV support for now.
At rte_flow layer, there are new items defined for matching
type/nexthdr/segment_left field.
Signed-off-by: Rongwei Liu <rongweil@nvidia.com>
---
doc/guides/prog_guide/rte_flow.rst | 9 ++++++
doc/guides/rel_notes/release_22_03.rst | 5 ++++
lib/ethdev/rte_flow.c | 15 ++++++++++
lib/ethdev/rte_flow.h | 39 ++++++++++++++++++++++++++
lib/net/rte_ip.h | 21 ++++++++++++++
5 files changed, 89 insertions(+)
diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index 3e6242803d..1ebc159893 100644
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -1544,6 +1544,15 @@ Matches Color Marker set by a Meter.
- ``color``: Metering color marker.
+Item: ``IPV6_ROUTING_EXT``
+^^^^^^^^^^^^^^^^^^^^^
+
+Matches ipv6 routing extension header.
+
+- ``nexthdr``: Next layer header type.
+- ``type``: IPv6 routing extension header type.
+- ``segments_left``: How many IPv6 destination addresses carries on
+
Actions
~~~~~~~
diff --git a/doc/guides/rel_notes/release_22_03.rst b/doc/guides/rel_notes/release_22_03.rst
index 0923707cb8..cc050ff3e7 100644
--- a/doc/guides/rel_notes/release_22_03.rst
+++ b/doc/guides/rel_notes/release_22_03.rst
@@ -207,6 +207,11 @@ API Changes
* ethdev: Old public macros and enumeration constants without ``RTE_ETH_`` prefix,
which are kept for backward compatibility, are marked as deprecated.
+* ethdev: added a new structure:
+
+ - IPv6 routing extension header ``rte_flow_item_ipv6_routing_ext`` and
+ ``rte_ipv6_routing_ext``
+
* cryptodev: The asymmetric session handling was modified to use a single
mempool object. An API ``rte_cryptodev_asym_session_pool_create`` was added
to create a mempool with element size big enough to hold the generic asymmetric
diff --git a/lib/ethdev/rte_flow.c b/lib/ethdev/rte_flow.c
index 7d0c24366c..e08b690300 100644
--- a/lib/ethdev/rte_flow.c
+++ b/lib/ethdev/rte_flow.c
@@ -76,6 +76,19 @@ rte_flow_item_flex_conv(void *buf, const void *data)
return src->length;
}
+static size_t
+rte_flow_item_ipv6_routing_ext_conv(void *buf, const void *data)
+{
+ struct rte_flow_item_ipv6_routing_ext *dst = buf;
+ const struct rte_flow_item_ipv6_routing_ext *src = data;
+
+ if (buf)
+ rte_memcpy((void *)((uintptr_t)(dst->hdr.segments)),
+ src->hdr.segments,
+ src->hdr.segments_left << 4);
+ return src->hdr.segments_left << 4;
+}
+
/** Generate flow_item[] entry. */
#define MK_FLOW_ITEM(t, s) \
[RTE_FLOW_ITEM_TYPE_ ## t] = { \
@@ -157,6 +170,8 @@ static const struct rte_flow_desc_data rte_flow_desc_item[] = {
MK_FLOW_ITEM(L2TPV2, sizeof(struct rte_flow_item_l2tpv2)),
MK_FLOW_ITEM(PPP, sizeof(struct rte_flow_item_ppp)),
MK_FLOW_ITEM(METER_COLOR, sizeof(struct rte_flow_item_meter_color)),
+ MK_FLOW_ITEM_FN(IPV6_ROUTING_EXT, sizeof(struct rte_flow_item_ipv6_routing_ext),
+ rte_flow_item_ipv6_routing_ext_conv),
};
/** Generate flow_action[] entry. */
diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
index b60987db4b..f8f1d6f9dd 100644
--- a/lib/ethdev/rte_flow.h
+++ b/lib/ethdev/rte_flow.h
@@ -624,6 +624,33 @@ enum rte_flow_item_type {
* See struct rte_flow_item_meter_color.
*/
RTE_FLOW_ITEM_TYPE_METER_COLOR,
+ /**
+ * Matches the presence of IPv6 routing extension header.
+ *
+ * See struct rte_flow_item_ipv6_routing_ext.
+ */
+ RTE_FLOW_ITEM_TYPE_IPV6_ROUTING_EXT,
+
+ /**
+ * Matches IPv6 routing extension header next header.
+ *
+ * See struct rte_flow_item_ipv6_routing_ext.
+ */
+ RTE_FLOW_ITEM_TYPE_IPV6_ROUTING_EXT_NEXT_HDR,
+
+ /**
+ * Matches IPv6 routing extension header type.
+ *
+ * See struct rte_flow_item_ipv6_routing_ext.
+ */
+ RTE_FLOW_ITEM_TYPE_IPV6_ROUTING_EXT_TYPE,
+
+ /**
+ * Matches IPv6 routing extension header segment left.
+ *
+ * See struct rte_flow_item_ipv6_routing_ext.
+ */
+ RTE_FLOW_ITEM_TYPE_IPV6_ROUTING_EXT_SEG_LEFT,
};
/**
@@ -873,6 +900,18 @@ struct rte_flow_item_ipv6 {
uint32_t reserved:23;
};
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * RTE_FLOW_ITEM_TYPE_IPV6_ROUTING_EXT.
+ *
+ * Matches an IPv6 routing extension header.
+ */
+struct rte_flow_item_ipv6_routing_ext {
+ struct rte_ipv6_routing_ext hdr;
+};
+
/** Default mask for RTE_FLOW_ITEM_TYPE_IPV6. */
#ifndef __cplusplus
static const struct rte_flow_item_ipv6 rte_flow_item_ipv6_mask = {
diff --git a/lib/net/rte_ip.h b/lib/net/rte_ip.h
index 9c8e8206f0..2b9a65dfcb 100644
--- a/lib/net/rte_ip.h
+++ b/lib/net/rte_ip.h
@@ -539,6 +539,27 @@ struct rte_ipv6_hdr {
uint8_t dst_addr[16]; /**< IP address of destination host(s). */
} __rte_packed;
+/**
+ * IPv6 Routing Extension Header
+ */
+struct rte_ipv6_routing_ext {
+ uint8_t nexthdr; /**< Protocol, next header. */
+ uint8_t hdrlen; /**< Header length. */
+ uint8_t type; /**< Extension header type. */
+ uint8_t segments_left; /**< Valid segments number. */
+ __extension__
+ union {
+ uint32_t flags;
+ struct {
+ uint8_t last_entry; /**< The last_entry field of SRH */
+ uint8_t flag; /**< Packet flag. */
+ uint16_t tag; /**< Packet tag. */
+ };
+ };
+ __extension__
+ uint32_t segments[0]; /**< Each hop IPv6 address. */
+} __rte_packed;
+
/* IPv6 vtc_flow: IPv / TC / flow_label */
#define RTE_IPV6_HDR_FL_SHIFT 0
#define RTE_IPV6_HDR_TC_SHIFT 20
--
2.27.0