[v2,1/3] lib: add IPv6 lookup node

  From: Sunil Kumar Kori <skori@marvell.com>

Similar to IPv4 lookup node, patch adds IPv6 lookup
node.

Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
Signed-off-by: Amit Prakash Shukla <amitprakashs@marvell.com>
---
v2:
- Performance related changes

 doc/guides/prog_guide/graph_lib.rst |  13 +
 lib/node/ip6_lookup.c               | 374 ++++++++++++++++++++++++++++
 lib/node/meson.build                |   3 +-
 lib/node/node_private.h             |   3 +-
 lib/node/pkt_cls.c                  |  14 ++
 lib/node/pkt_cls_priv.h             |   1 +
 lib/node/rte_node_ip6_api.h         |  80 ++++++
 lib/node/version.map                |   2 +
 8 files changed, 488 insertions(+), 2 deletions(-)
 create mode 100644 lib/node/ip6_lookup.c
 create mode 100644 lib/node/rte_node_ip6_api.h
  

On Thu, May 18, 2023 at 9:27 PM Amit Prakash Shukla
<amitprakashs@marvell.com> wrote:
>
> From: Sunil Kumar Kori <skori@marvell.com>
>
> Similar to IPv4 lookup node, patch adds IPv6 lookup
> node.
>
> Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
> Signed-off-by: Amit Prakash Shukla <amitprakashs@marvell.com>
> ---
> v2:
> - Performance related changes
>
>  doc/guides/prog_guide/graph_lib.rst |  13 +
>  lib/node/ip6_lookup.c               | 374 ++++++++++++++++++++++++++++
>  lib/node/meson.build                |   3 +-
>  lib/node/node_private.h             |   3 +-
>  lib/node/pkt_cls.c                  |  14 ++
>  lib/node/pkt_cls_priv.h             |   1 +
>  lib/node/rte_node_ip6_api.h         |  80 ++++++
>  lib/node/version.map                |   2 +
>  8 files changed, 488 insertions(+), 2 deletions(-)
>  create mode 100644 lib/node/ip6_lookup.c
>  create mode 100644 lib/node/rte_node_ip6_api.h
>
> diff --git a/doc/guides/prog_guide/graph_lib.rst b/doc/guides/prog_guide/graph_lib.rst
> index 1cfdc86433..1f70d63628 100644
> --- a/doc/guides/prog_guide/graph_lib.rst
> +++ b/doc/guides/prog_guide/graph_lib.rst
> @@ -388,6 +388,19 @@ to determine the L2 header to be written to the packet before sending
>  the packet out to a particular ethdev_tx node.
>  ``rte_node_ip4_rewrite_add()`` is control path API to add next-hop info.
>
> +ip6_lookup
> +~~~~~~~~~~
> +This node is an intermediate node that does LPM lookup for the received
> +ipv6 packets and the result determines each packets next node.
> +
> +On successful LPM lookup, the result contains the ``next_node`` id and
> +``next-hop`` id with which the packet needs to be further processed.
> +
> +On LPM lookup failure, objects are redirected to pkt_drop node.
> +``rte_node_ip6_route_add()`` is control path API to add ipv6 routes.
> +To achieve home run, node use ``rte_node_stream_move()`` as mentioned in above
> +sections.
> +
>  null
>  ~~~~
>  This node ignores the set of objects passed to it and reports that all are
> diff --git a/lib/node/ip6_lookup.c b/lib/node/ip6_lookup.c
> new file mode 100644
> index 0000000000..a377c06072
> --- /dev/null
> +++ b/lib/node/ip6_lookup.c
> @@ -0,0 +1,374 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(C) 2023 Marvell.
> + */
> +
> +#include <arpa/inet.h>
> +#include <sys/socket.h>
> +
> +#include <rte_ethdev.h>
> +#include <rte_ether.h>
> +#include <rte_graph.h>
> +#include <rte_graph_worker.h>
> +#include <rte_ip.h>
> +#include <rte_lpm6.h>
> +
> +#include "rte_node_ip6_api.h"
> +
> +#include "node_private.h"
> +
> +#define IPV6_L3FWD_LPM_MAX_RULES 1024
> +#define IPV6_L3FWD_LPM_NUMBER_TBL8S (1 << 8)
> +
> +/* IP6 Lookup global data struct */
> +struct ip6_lookup_node_main {
> +       struct rte_lpm6 *lpm_tbl[RTE_MAX_NUMA_NODES];
> +};
> +
> +struct ip6_lookup_node_ctx {
> +       /* Socket's LPM table */
> +       struct rte_lpm6 *lpm6;
> +       /* Dynamic offset to mbuf priv1 */
> +       int mbuf_priv1_off;
> +};
> +
> +int ip6_node_mbuf_priv1_dynfield_offset = -1;
> +
> +static struct ip6_lookup_node_main ip6_lookup_nm;
> +
> +#define IP6_LOOKUP_NODE_LPM(ctx) \
> +       (((struct ip6_lookup_node_ctx *)ctx)->lpm6)
> +
> +#define IP6_LOOKUP_NODE_PRIV1_OFF(ctx) \
> +       (((struct ip6_lookup_node_ctx *)ctx)->mbuf_priv1_off)
> +
> +static uint16_t
> +ip6_lookup_node_process_scalar(struct rte_graph *graph, struct rte_node *node,
> +                       void **objs, uint16_t nb_objs)
> +{
> +       struct rte_mbuf *mbuf0, *mbuf1, *mbuf2, *mbuf3, **pkts;
> +       struct rte_lpm6 *lpm6 = IP6_LOOKUP_NODE_LPM(node->ctx);
> +       const int dyn = IP6_LOOKUP_NODE_PRIV1_OFF(node->ctx);
> +       struct rte_ipv6_hdr *ipv6_hdr;
> +       void **to_next, **from;
> +       uint16_t last_spec = 0;
> +       rte_edge_t next_index;
> +       uint16_t n_left_from;
> +       uint16_t held = 0;
> +       uint32_t drop_nh;
> +       int i, rc;
> +
> +       /* Speculative next */
> +       next_index = RTE_NODE_IP6_LOOKUP_NEXT_REWRITE;
> +       /* Drop node */
> +       drop_nh = ((uint32_t)RTE_NODE_IP6_LOOKUP_NEXT_PKT_DROP) << 16;
> +
> +       pkts = (struct rte_mbuf **)objs;
> +       from = objs;
> +       n_left_from = nb_objs;
> +
> +       for (i = OBJS_PER_CLINE; i < RTE_GRAPH_BURST_SIZE; i += OBJS_PER_CLINE)
> +               rte_prefetch0(&objs[i]);
> +
> +       for (i = 0; i < 4 && i < n_left_from; i++)
> +               rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[i], void *,
> +                                               sizeof(struct rte_ether_hdr)));
> +
> +       /* Get stream for the speculated next node */
> +       to_next = rte_node_next_stream_get(graph, node, next_index, nb_objs);
> +       while (n_left_from >= 4) {
> +#if RTE_GRAPH_BURST_SIZE > 64
> +               /* Prefetch next-next mbufs */
> +               if (likely(n_left_from > 11)) {
> +                       rte_prefetch0(pkts[8]);
> +                       rte_prefetch0(pkts[9]);
> +                       rte_prefetch0(pkts[10]);
> +                       rte_prefetch0(pkts[11]);
> +               }
> +#endif
> +               /* Prefetch next mbuf data */
> +               if (likely(n_left_from > 7)) {
> +                       rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[4], void *,
> +                                               sizeof(struct rte_ether_hdr)));
> +                       rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[5], void *,
> +                                               sizeof(struct rte_ether_hdr)));
> +                       rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[6], void *,
> +                                               sizeof(struct rte_ether_hdr)));
> +                       rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[7], void *,
> +                                               sizeof(struct rte_ether_hdr)));
> +               }
> +
> +               mbuf0 = pkts[0];
> +               mbuf1 = pkts[1];
> +               mbuf2 = pkts[2];
> +               mbuf3 = pkts[3];
> +
> +               pkts += 4;
> +               n_left_from -= 4;
> +
> +               uint8_t ip_batch[4][16];
> +               int32_t next_hop[4];
> +               uint16_t next[4];

Can you move these variables to beginning of scope
> +
> +               /* Extract DIP of mbuf0 */
> +               ipv6_hdr = rte_pktmbuf_mtod_offset(mbuf0, struct rte_ipv6_hdr *,
> +                               sizeof(struct rte_ether_hdr));
> +               /* Extract hop_limits as ipv6 hdr is in cache */
> +               node_mbuf_priv1(mbuf0, dyn)->ttl = ipv6_hdr->hop_limits;
> +               rte_memcpy(ip_batch[0], ipv6_hdr->dst_addr, 16);
> +
> +               /* Extract DIP of mbuf1 */
> +               ipv6_hdr = rte_pktmbuf_mtod_offset(mbuf1, struct rte_ipv6_hdr *,
> +                               sizeof(struct rte_ether_hdr));
> +               /* Extract hop_limits as ipv6 hdr is in cache */
> +               node_mbuf_priv1(mbuf1, dyn)->ttl = ipv6_hdr->hop_limits;
> +               rte_memcpy(ip_batch[1], ipv6_hdr->dst_addr, 16);
> +
> +               /* Extract DIP of mbuf2 */
> +               ipv6_hdr = rte_pktmbuf_mtod_offset(mbuf2, struct rte_ipv6_hdr *,
> +                               sizeof(struct rte_ether_hdr));
> +               /* Extract hop_limits as ipv6 hdr is in cache */
> +               node_mbuf_priv1(mbuf2, dyn)->ttl = ipv6_hdr->hop_limits;
> +               rte_memcpy(ip_batch[2], ipv6_hdr->dst_addr, 16);
> +
> +               /* Extract DIP of mbuf3 */
> +               ipv6_hdr = rte_pktmbuf_mtod_offset(mbuf3, struct rte_ipv6_hdr *,
> +                               sizeof(struct rte_ether_hdr));
> +               /* Extract hop_limits as ipv6 hdr is in cache */
> +               node_mbuf_priv1(mbuf3, dyn)->ttl = ipv6_hdr->hop_limits;
> +               rte_memcpy(ip_batch[3], ipv6_hdr->dst_addr, 16);
> +
> +               rc = rte_lpm6_lookup_bulk_func(lpm6, ip_batch, next_hop, 4);
> +
> +               next_hop[0] = (next_hop[0] < 0) ? (int32_t)drop_nh : next_hop[0];
> +               node_mbuf_priv1(mbuf0, dyn)->nh = (uint16_t)next_hop[0];
> +               next[0] = (uint16_t)(next_hop[0] >> 16);
> +
> +               next_hop[1] = (next_hop[1] < 0) ? (int32_t)drop_nh : next_hop[1];
> +               node_mbuf_priv1(mbuf1, dyn)->nh = (uint16_t)next_hop[1];
> +               next[1] = (uint16_t)(next_hop[1] >> 16);
> +
> +               next_hop[2] = (next_hop[2] < 0) ? (int32_t)drop_nh : next_hop[2];
> +               node_mbuf_priv1(mbuf2, dyn)->nh = (uint16_t)next_hop[2];
> +               next[2] = (uint16_t)(next_hop[2] >> 16);
> +
> +               next_hop[3] = (next_hop[3] < 0) ? (int32_t)drop_nh : next_hop[3];
> +               node_mbuf_priv1(mbuf3, dyn)->nh = (uint16_t)next_hop[3];
> +               next[3] = (uint16_t)(next_hop[3] >> 16);
> +
> +               rte_edge_t fix_spec = ((next_index == next[0]) &&
> +                                       (next_index == next[1]) &&
> +                                       (next_index == next[2]) &&
> +                                       (next_index == next[3]));
> +
> +               if (unlikely(fix_spec == 0)) {
> +                       /* Copy things successfully speculated till now */
> +                       rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
> +                       from += last_spec;
> +                       to_next += last_spec;
> +                       held += last_spec;
> +                       last_spec = 0;
> +
> +                       /* Next0 */
> +                       if (next_index == next[0]) {
> +                               to_next[0] = from[0];
> +                               to_next++;
> +                               held++;
> +                       } else {
> +                               rte_node_enqueue_x1(graph, node, next[0], from[0]);
> +                       }
> +
> +                       /* Next1 */
> +                       if (next_index == next[1]) {
> +                               to_next[0] = from[1];
> +                               to_next++;
> +                               held++;
> +                       } else {
> +                               rte_node_enqueue_x1(graph, node, next[1], from[1]);
> +                       }
> +
> +                       /* Next2 */
> +                       if (next_index == next[2]) {
> +                               to_next[0] = from[2];
> +                               to_next++;
> +                               held++;
> +                       } else {
> +                               rte_node_enqueue_x1(graph, node, next[2], from[2]);
> +                       }
> +
> +                       /* Next3 */
> +                       if (next_index == next[3]) {
> +                               to_next[0] = from[3];
> +                               to_next++;
> +                               held++;
> +                       } else {
> +                               rte_node_enqueue_x1(graph, node, next[3], from[3]);
> +                       }
> +
> +                       from += 4;
> +               } else {
> +                       last_spec += 4;
> +               }
> +       }
> +
> +       while (n_left_from > 0) {
> +               uint32_t next_hop;
> +               uint16_t next0;
> +
> +               mbuf0 = pkts[0];
> +
> +               pkts += 1;
> +               n_left_from -= 1;
> +
> +               /* Extract DIP of mbuf0 */
> +               ipv6_hdr = rte_pktmbuf_mtod_offset(mbuf0, struct rte_ipv6_hdr *,
> +                                               sizeof(struct rte_ether_hdr));
> +               /* Extract ttl as ipv6 hdr is in cache */
> +               node_mbuf_priv1(mbuf0, dyn)->ttl = ipv6_hdr->hop_limits;
> +
> +               rc = rte_lpm6_lookup(lpm6, ipv6_hdr->dst_addr, &next_hop);
> +               next_hop = (rc == 0) ? next_hop : drop_nh;
> +
> +               node_mbuf_priv1(mbuf0, dyn)->nh = (uint16_t)next_hop;
> +               next_hop = next_hop >> 16;
> +               next0 = (uint16_t)next_hop;
> +
> +               if (unlikely(next_index ^ next0)) {
> +                       /* Copy things successfully speculated till now */
> +                       rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
> +                       from += last_spec;
> +                       to_next += last_spec;
> +                       held += last_spec;
> +                       last_spec = 0;
> +
> +                       rte_node_enqueue_x1(graph, node, next0, from[0]);
> +                       from += 1;
> +               } else {
> +                       last_spec += 1;
> +               }
> +       }
> +
> +       /* !!! Home run !!! */
> +       if (likely(last_spec == nb_objs)) {
> +               rte_node_next_stream_move(graph, node, next_index);
> +               return nb_objs;
> +       }
> +       held += last_spec;
> +       rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
> +       rte_node_next_stream_put(graph, node, next_index, held);
> +
> +       return nb_objs;
> +}
> +
> +int
> +rte_node_ip6_route_add(const uint8_t *ip, uint8_t depth, uint16_t next_hop,
> +                      enum rte_node_ip6_lookup_next next_node)
> +{
> +       char abuf[INET6_ADDRSTRLEN];
> +       struct in6_addr in6;
> +       uint8_t socket;
> +       uint32_t val;
> +       int ret;
> +
> +       memcpy(in6.s6_addr, ip, RTE_LPM6_IPV6_ADDR_SIZE);
> +       inet_ntop(AF_INET6, &in6, abuf, sizeof(abuf));
> +       /* Embedded next node id into 24 bit next hop */
> +       val = ((next_node << 16) | next_hop) & ((1ull << 24) - 1);
> +       node_dbg("ip6_lookup", "LPM: Adding route %s / %d nh (0x%x)", abuf,
> +                depth, val);
> +
> +       for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) {
> +               if (!ip6_lookup_nm.lpm_tbl[socket])
> +                       continue;
> +
> +               ret = rte_lpm6_add(ip6_lookup_nm.lpm_tbl[socket], ip, depth,
> +                                  val);
> +               if (ret < 0) {
> +                       node_err("ip6_lookup",
> +                                "Unable to add entry %s / %d nh (%x) to LPM "
> +                                "table on sock %d, rc=%d\n",
> +                                abuf, depth, val, socket, ret);
> +                       return ret;
> +               }
> +       }
> +
> +       return 0;
> +}
> +
> +static int
> +setup_lpm6(struct ip6_lookup_node_main *nm, int socket)
> +{
> +       struct rte_lpm6_config config_ipv6;
> +       char s[RTE_LPM6_NAMESIZE];
> +
> +       /* One LPM table per socket */
> +       if (nm->lpm_tbl[socket])
> +               return 0;
> +
> +       /* create the LPM table */
> +       config_ipv6.max_rules = IPV6_L3FWD_LPM_MAX_RULES;
> +       config_ipv6.number_tbl8s = IPV6_L3FWD_LPM_NUMBER_TBL8S;
> +       config_ipv6.flags = 0;
> +       snprintf(s, sizeof(s), "IPV6_L3FWD_LPM_%d", socket);
> +       nm->lpm_tbl[socket] = rte_lpm6_create(s, socket, &config_ipv6);
> +       if (nm->lpm_tbl[socket] == NULL)
> +               return -rte_errno;
> +
> +       return 0;
> +}
> +
> +static int
> +ip6_lookup_node_init(const struct rte_graph *graph, struct rte_node *node)
> +{
> +       uint16_t socket, lcore_id;
> +       static uint8_t init_once;
> +       int rc;
> +
> +       RTE_SET_USED(graph);
> +       RTE_BUILD_BUG_ON(sizeof(struct ip6_lookup_node_ctx) > RTE_NODE_CTX_SZ);
> +
> +       if (!init_once) {
> +               ip6_node_mbuf_priv1_dynfield_offset =
> +                       rte_mbuf_dynfield_register(
> +                               &node_mbuf_priv1_dynfield_desc);

You can use node_mbuf_priv1_dynfield_offset itself for this right
which is already extern instead of using another variable
ip6_node_mbuf_priv1_dynfield_offset ?

> +               if (ip6_node_mbuf_priv1_dynfield_offset < 0)
> +                       return -rte_errno;
> +
> +               /* Setup LPM tables for all sockets */
> +               RTE_LCORE_FOREACH(lcore_id)
> +               {
> +                       socket = rte_lcore_to_socket_id(lcore_id);
> +                       rc = setup_lpm6(&ip6_lookup_nm, socket);
> +                       if (rc) {
> +                               node_err("ip6_lookup",
> +                                        "Failed to setup lpm6 tbl for "
> +                                        "sock %u, rc=%d", socket, rc);
> +                               return rc;
> +                       }
> +               }
> +               init_once = 1;
> +       }
> +
> +       /* Update socket's LPM and mbuf dyn priv1 offset in node ctx */
> +       IP6_LOOKUP_NODE_LPM(node->ctx) = ip6_lookup_nm.lpm_tbl[graph->socket];
> +       IP6_LOOKUP_NODE_PRIV1_OFF(node->ctx) =
> +                                       ip6_node_mbuf_priv1_dynfield_offset;
> +
> +       node_dbg("ip6_lookup", "Initialized ip6_lookup node");
> +
> +       return 0;
> +}
> +
> +static struct rte_node_register ip6_lookup_node = {
> +       .process = ip6_lookup_node_process_scalar,
> +       .name = "ip6_lookup",
> +
> +       .init = ip6_lookup_node_init,
> +
> +       .nb_edges = RTE_NODE_IP6_LOOKUP_NEXT_MAX,
> +       .next_nodes = {
> +               [RTE_NODE_IP6_LOOKUP_NEXT_REWRITE] = "ip6_rewrite",
> +               [RTE_NODE_IP6_LOOKUP_NEXT_PKT_DROP] = "pkt_drop",
> +       },
> +};
> +
> +RTE_NODE_REGISTER(ip6_lookup_node);
> diff --git a/lib/node/meson.build b/lib/node/meson.build
> index dbdf673c86..cd30847a0b 100644
> --- a/lib/node/meson.build
> +++ b/lib/node/meson.build
> @@ -12,13 +12,14 @@ sources = files(
>          'ethdev_rx.c',
>          'ethdev_tx.c',
>          'ip4_lookup.c',
> +        'ip6_lookup.c',
>          'ip4_rewrite.c',
>          'log.c',
>          'null.c',
>          'pkt_cls.c',
>          'pkt_drop.c',
>  )
> -headers = files('rte_node_ip4_api.h', 'rte_node_eth_api.h')
> +headers = files('rte_node_ip4_api.h', 'rte_node_ip6_api.h', 'rte_node_eth_api.h')
>  # Strict-aliasing rules are violated by uint8_t[] to context size casts.
>  cflags += '-fno-strict-aliasing'
>  deps += ['graph', 'mbuf', 'lpm', 'ethdev', 'mempool', 'cryptodev']
> diff --git a/lib/node/node_private.h b/lib/node/node_private.h
> index 8c73d5dc10..27555cbfd8 100644
> --- a/lib/node/node_private.h
> +++ b/lib/node/node_private.h
> @@ -26,7 +26,7 @@ extern int rte_node_logtype;
>   */
>  struct node_mbuf_priv1 {
>         union {
> -               /* IP4 rewrite */
> +               /* IP4/IP6 rewrite */
>                 struct {
>                         uint16_t nh;
>                         uint16_t ttl;
> @@ -43,6 +43,7 @@ static const struct rte_mbuf_dynfield node_mbuf_priv1_dynfield_desc = {
>         .align = __alignof__(struct node_mbuf_priv1),
>  };
>  extern int node_mbuf_priv1_dynfield_offset;
> +extern int ip6_node_mbuf_priv1_dynfield_offset;
>
>  /**
>   * Node mbuf private area 2.
> diff --git a/lib/node/pkt_cls.c b/lib/node/pkt_cls.c
> index 3e75f2cf78..a8302b8d28 100644
> --- a/lib/node/pkt_cls.c
> +++ b/lib/node/pkt_cls.c
> @@ -24,6 +24,19 @@ static const uint8_t p_nxt[256] __rte_cache_aligned = {
>
>         [RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L2_ETHER] =
>                 PKT_CLS_NEXT_IP4_LOOKUP,
> +
> +       [RTE_PTYPE_L3_IPV6] = PKT_CLS_NEXT_IP6_LOOKUP,
> +
> +       [RTE_PTYPE_L3_IPV6_EXT] = PKT_CLS_NEXT_IP6_LOOKUP,
> +
> +       [RTE_PTYPE_L3_IPV6_EXT_UNKNOWN] = PKT_CLS_NEXT_IP6_LOOKUP,
> +
> +       [RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L2_ETHER] = PKT_CLS_NEXT_IP6_LOOKUP,
> +
> +       [RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L2_ETHER] = PKT_CLS_NEXT_IP6_LOOKUP,
> +
> +       [RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L2_ETHER] =
> +               PKT_CLS_NEXT_IP6_LOOKUP,
>  };
>
>  static uint16_t
> @@ -216,6 +229,7 @@ struct rte_node_register pkt_cls_node = {
>                 /* Pkt drop node starts at '0' */
>                 [PKT_CLS_NEXT_PKT_DROP] = "pkt_drop",
>                 [PKT_CLS_NEXT_IP4_LOOKUP] = "ip4_lookup",
> +               [PKT_CLS_NEXT_IP6_LOOKUP] = "ip6_lookup",
>         },
>  };
>  RTE_NODE_REGISTER(pkt_cls_node);
> diff --git a/lib/node/pkt_cls_priv.h b/lib/node/pkt_cls_priv.h
> index 6f5374f0be..16135807a1 100644
> --- a/lib/node/pkt_cls_priv.h
> +++ b/lib/node/pkt_cls_priv.h
> @@ -13,6 +13,7 @@ struct pkt_cls_node_ctx {
>  enum pkt_cls_next_nodes {
>         PKT_CLS_NEXT_PKT_DROP,
>         PKT_CLS_NEXT_IP4_LOOKUP,
> +       PKT_CLS_NEXT_IP6_LOOKUP,
>         PKT_CLS_NEXT_MAX,
>  };
>
> diff --git a/lib/node/rte_node_ip6_api.h b/lib/node/rte_node_ip6_api.h
> new file mode 100644
> index 0000000000..1696ed154d
> --- /dev/null
> +++ b/lib/node/rte_node_ip6_api.h
> @@ -0,0 +1,80 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(C) 2023 Marvell.
> + */
> +
> +#ifndef __INCLUDE_RTE_NODE_IP6_API_H__
> +#define __INCLUDE_RTE_NODE_IP6_API_H__
> +
> +/**
> + * @file rte_node_ip6_api.h
> + *
> + * @warning
> + * @b EXPERIMENTAL:
> + * All functions in this file may be changed or removed without prior notice.
> + *
> + * This API allows to do control path functions of ip6_* nodes
> + * like ip6_lookup, ip6_rewrite.
> + *
> + */
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +#include <rte_common.h>
> +#include <rte_compat.h>
> +
> +/**
> + * IP6 lookup next nodes.
> + */
> +enum rte_node_ip6_lookup_next {
> +       RTE_NODE_IP6_LOOKUP_NEXT_REWRITE,
> +       /**< Rewrite node. */
> +       RTE_NODE_IP6_LOOKUP_NEXT_PKT_DROP,
> +       /**< Packet drop node. */
> +       RTE_NODE_IP6_LOOKUP_NEXT_MAX,
> +       /**< Number of next nodes of lookup node. */
> +};
> +
> +/**
> + * Add ipv6 route to lookup table.
> + *
> + * @param ip
> + *   IPv6 address of route to be added.
> + * @param depth
> + *   Depth of the rule to be added.
> + * @param next_hop
> + *   Next hop id of the rule result to be added.
> + * @param next_node
> + *   Next node to redirect traffic to.
> + *
> + * @return
> + *   0 on success, negative otherwise.
> + */
> +__rte_experimental
> +int rte_node_ip6_route_add(const uint8_t *ip, uint8_t depth, uint16_t next_hop,
> +                          enum rte_node_ip6_lookup_next next_node);
> +
> +/**
> + * Add a next hop's rewrite data.
> + *
> + * @param next_hop
> + *   Next hop id to add rewrite data to.
> + * @param rewrite_data
> + *   Rewrite data.
> + * @param rewrite_len
> + *   Length of rewrite data.
> + * @param dst_port
> + *   Destination port to redirect traffic to.
> + *
> + * @return
> + *   0 on success, negative otherwise.
> + */
> +__rte_experimental
> +int rte_node_ip6_rewrite_add(uint16_t next_hop, uint8_t *rewrite_data,
> +                            uint8_t rewrite_len, uint16_t dst_port);
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#endif /* __INCLUDE_RTE_NODE_IP6_API_H__ */
> diff --git a/lib/node/version.map b/lib/node/version.map
> index a799b0d389..40df308bfe 100644
> --- a/lib/node/version.map
> +++ b/lib/node/version.map
> @@ -4,6 +4,8 @@ EXPERIMENTAL {
>         rte_node_eth_config;
>         rte_node_ip4_route_add;
>         rte_node_ip4_rewrite_add;
> +       rte_node_ip6_rewrite_add;
> +       rte_node_ip6_route_add;
>         rte_node_logtype;
>         local: *;
>  };
> --
> 2.25.1
>