[dpdk-dev] [PATCH v4 1/4] Add RIB library

[Medvedkin Vladimir <medvedkinv@gmail.com>]

Signed-off-by: Medvedkin Vladimir <medvedkinv@gmail.com>
---
 config/common_base                 |   6 +
 doc/api/doxy-api.conf              |   1 +
 lib/Makefile                       |   2 +
 lib/librte_rib/Makefile            |  23 ++
 lib/librte_rib/meson.build         |   6 +
 lib/librte_rib/rte_rib.c           | 520 +++++++++++++++++++++++++++++++++++++
 lib/librte_rib/rte_rib.h           | 302 +++++++++++++++++++++
 lib/librte_rib/rte_rib_version.map |  18 ++
 lib/meson.build                    |   2 +-
 mk/rte.app.mk                      |   1 +
 10 files changed, 880 insertions(+), 1 deletion(-)
 create mode 100644 lib/librte_rib/Makefile
 create mode 100644 lib/librte_rib/meson.build
 create mode 100644 lib/librte_rib/rte_rib.c
 create mode 100644 lib/librte_rib/rte_rib.h
 create mode 100644 lib/librte_rib/rte_rib_version.map

diff --git a/config/common_base b/config/common_base
index 7e45412..833442c 100644
--- a/config/common_base
+++ b/config/common_base
@@ -709,6 +709,12 @@ CONFIG_RTE_LIBRTE_LPM=y
 CONFIG_RTE_LIBRTE_LPM_DEBUG=n
 
 #
+# Compile librte_rib
+#
+CONFIG_RTE_LIBRTE_RIB=y
+CONFIG_RTE_LIBRTE_RIB_DEBUG=n
+
+#
 # Compile librte_acl
 #
 CONFIG_RTE_LIBRTE_ACL=y
diff --git a/doc/api/doxy-api.conf b/doc/api/doxy-api.conf
index ad8bdcf..8f42564 100644
--- a/doc/api/doxy-api.conf
+++ b/doc/api/doxy-api.conf
@@ -60,6 +60,7 @@ INPUT                   = doc/api/doxy-api-index.md \
                           lib/librte_kvargs \
                           lib/librte_latencystats \
                           lib/librte_lpm \
+                          lib/librte_rib \
                           lib/librte_mbuf \
                           lib/librte_member \
                           lib/librte_mempool \
diff --git a/lib/Makefile b/lib/Makefile
index 965be6c..cb1d4e0 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -43,6 +43,8 @@ DIRS-$(CONFIG_RTE_LIBRTE_EFD) += librte_efd
 DEPDIRS-librte_efd := librte_eal librte_ring librte_hash
 DIRS-$(CONFIG_RTE_LIBRTE_LPM) += librte_lpm
 DEPDIRS-librte_lpm := librte_eal
+DIRS-$(CONFIG_RTE_LIBRTE_RIB) += librte_rib
+DEPDIRS-librte_rib := librte_eal librte_mempool
 DIRS-$(CONFIG_RTE_LIBRTE_ACL) += librte_acl
 DEPDIRS-librte_acl := librte_eal
 DIRS-$(CONFIG_RTE_LIBRTE_MEMBER) += librte_member
diff --git a/lib/librte_rib/Makefile b/lib/librte_rib/Makefile
new file mode 100644
index 0000000..f6431b6
--- /dev/null
+++ b/lib/librte_rib/Makefile
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Vladimir Medvedkin <medvedkinv@gmail.com>
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# library name
+LIB = librte_rib.a
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR)
+LDLIBS += -lrte_eal -lrte_mempool
+
+EXPORT_MAP := rte_rib_version.map
+
+LIBABIVER := 1
+
+# all source are stored in SRCS-y
+SRCS-$(CONFIG_RTE_LIBRTE_RIB) := rte_rib.c rte_dir24_8.c
+
+# install this header file
+SYMLINK-$(CONFIG_RTE_LIBRTE_RIB)-include := rte_rib.h rte_dir24_8.h
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_rib/meson.build b/lib/librte_rib/meson.build
new file mode 100644
index 0000000..0f4b865
--- /dev/null
+++ b/lib/librte_rib/meson.build
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2017 Intel Corporation
+
+sources = files('rte_rib.c', 'rte_dir24_8.c')
+headers = files('rte_rib.h', 'rte_dir24_8.h')
+deps += ['mempool']
diff --git a/lib/librte_rib/rte_rib.c b/lib/librte_rib/rte_rib.c
new file mode 100644
index 0000000..67a637b
--- /dev/null
+++ b/lib/librte_rib/rte_rib.c
@@ -0,0 +1,520 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Vladimir Medvedkin <medvedkinv@gmail.com>
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/queue.h>
+
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_common.h>
+#include <rte_tailq.h>
+#include <rte_errno.h>
+#include <rte_rwlock.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_mempool.h>
+#include <rte_malloc.h>
+#include <rte_log.h>
+
+#include <rte_rib.h>
+#include <rte_dir24_8.h>
+
+TAILQ_HEAD(rte_rib_list, rte_tailq_entry);
+static struct rte_tailq_elem rte_rib_tailq = {
+	.name = "RTE_RIB",
+};
+EAL_REGISTER_TAILQ(rte_rib_tailq)
+
+struct rte_rib {
+	char		name[RTE_RIB_NAMESIZE];
+	/*pointer to rib trie*/
+	struct rte_rib_node	*trie;
+	/*pointer to dataplane struct*/
+	void			*fib;
+	/*prefix modification*/
+	rte_rib_modify_fn_t	modify;
+	/* Bulk lookup fn*/
+	rte_rib_lookup_fn_t	lookup;
+	struct rte_mempool	*node_pool;
+	uint32_t		cur_nodes;
+	uint32_t		cur_routes;
+	int			max_nodes;
+	int			node_sz;
+	enum rte_rib_type	type;
+};
+
+static inline int __attribute__((pure))
+rte_rib_is_right_node(struct rte_rib_node *node)
+{
+	return (node->parent->right == node);
+}
+
+/**
+ * Check if prefix1 {key1/depth1}
+ * is covered by prefix2 {key2/depth2}
+ */
+static inline int __attribute__((pure))
+rte_rib_is_covered(uint32_t key1, uint8_t depth1, uint32_t key2, uint8_t depth2)
+{
+	return ((((key1 ^ key2) & rte_rib_depth_to_mask(depth2)) == 0)
+		&& (depth1 > depth2));
+}
+
+static inline struct rte_rib_node *__attribute__((pure))
+rte_rib_get_nxt_node(struct rte_rib_node *node, uint32_t key)
+{
+	return ((key & (1 << (31 - node->depth))) ? node->right : node->left);
+}
+
+static struct rte_rib_node *
+rte_rib_node_alloc(struct rte_rib *rib)
+{
+	struct rte_rib_node *ent;
+	int ret;
+
+	ret = rte_mempool_get(rib->node_pool, (void *)&ent);
+	if (unlikely(ret != 0))
+		return NULL;
+	++rib->cur_nodes;
+	return ent;
+}
+
+static void
+rte_rib_node_free(struct rte_rib *rib, struct rte_rib_node *ent)
+{
+	--rib->cur_nodes;
+	rte_mempool_put(rib->node_pool, ent);
+}
+
+struct rte_rib_node *
+rte_rib_tree_lookup(struct rte_rib *rib, uint32_t key)
+{
+	struct rte_rib_node *cur = rib->trie;
+	struct rte_rib_node *prev = NULL;
+
+	while ((cur != NULL) && (((cur->key ^ key) &
+			rte_rib_depth_to_mask(cur->depth)) == 0)) {
+		if ((cur->flag & RTE_RIB_VALID_NODE) == RTE_RIB_VALID_NODE)
+			prev = cur;
+		cur = rte_rib_get_nxt_node(cur, key);
+	}
+	return prev;
+}
+
+struct rte_rib_node *
+rte_rib_tree_lookup_parent(struct rte_rib_node *ent)
+{
+	struct rte_rib_node *tmp;
+
+	if (ent == NULL)
+		return NULL;
+	tmp = ent->parent;
+	while ((tmp != NULL) &&	(tmp->flag & RTE_RIB_VALID_NODE)
+			!= RTE_RIB_VALID_NODE) {
+		tmp = tmp->parent;
+	}
+	return tmp;
+}
+
+struct rte_rib_node *
+rte_rib_tree_lookup_exact(struct rte_rib *rib, uint32_t key, uint8_t depth)
+{
+	struct rte_rib_node *cur = rib->trie;
+
+	key &= rte_rib_depth_to_mask(depth);
+	while (cur != NULL) {
+		if ((cur->key == key) && (cur->depth == depth) &&
+				(cur->flag & RTE_RIB_VALID_NODE))
+			return cur;
+		if ((cur->depth > depth) ||
+				(((uint64_t)key >> (32 - cur->depth)) !=
+				((uint64_t)cur->key >> (32 - cur->depth))))
+			break;
+		cur = rte_rib_get_nxt_node(cur, key);
+	}
+	return NULL;
+}
+
+/**
+ *  Traverses on subtree and retrieves more specific routes
+ *  for a given in args key/depth prefix
+ *  last = NULL means the first invocation
+ */
+struct rte_rib_node *
+rte_rib_tree_get_nxt(struct rte_rib *rib, uint32_t key,
+	uint8_t depth, struct rte_rib_node *last, int flag)
+{
+	struct rte_rib_node *tmp, *prev = NULL;
+
+	if (last == NULL) {
+		tmp = rib->trie;
+		while ((tmp) && (tmp->depth < depth))
+			tmp = rte_rib_get_nxt_node(tmp, key);
+	} else {
+		tmp = last;
+		while ((tmp->parent != NULL) && (rte_rib_is_right_node(tmp) ||
+				(tmp->parent->right == NULL))) {
+			tmp = tmp->parent;
+			if ((tmp->flag & RTE_RIB_VALID_NODE) &&
+					(rte_rib_is_covered(tmp->key,
+					tmp->depth, key, depth)))
+				return tmp;
+		}
+		tmp = (tmp->parent) ? tmp->parent->right : NULL;
+	}
+	while (tmp) {
+		if ((tmp->flag & RTE_RIB_VALID_NODE) &&
+				(rte_rib_is_covered(tmp->key, tmp->depth,
+				key, depth))) {
+			prev = tmp;
+			if (flag == RTE_RIB_GET_NXT_COVER)
+				return prev;
+		}
+		tmp = (tmp->left) ? tmp->left : tmp->right;
+	}
+	return prev;
+}
+
+void
+rte_rib_tree_remove(struct rte_rib *rib, uint32_t key, uint8_t depth)
+{
+	struct rte_rib_node *cur, *prev, *child;
+
+	cur = rte_rib_tree_lookup_exact(rib, key, depth);
+	if (cur == NULL)
+		return;
+
+	--rib->cur_routes;
+	cur->flag &= ~RTE_RIB_VALID_NODE;
+	while ((cur->flag & RTE_RIB_VALID_NODE) != RTE_RIB_VALID_NODE) {
+		if ((cur->left != NULL) && (cur->right != NULL))
+			return;
+		child = (cur->left == NULL) ? cur->right : cur->left;
+		if (child != NULL)
+			child->parent = cur->parent;
+		if (cur->parent == NULL) {
+			rib->trie = child;
+			rte_rib_node_free(rib, cur);
+			return;
+		}
+		if (cur->parent->left == cur)
+			cur->parent->left = child;
+		else
+			cur->parent->right = child;
+		prev = cur;
+		cur = cur->parent;
+		rte_rib_node_free(rib, prev);
+	}
+}
+
+struct rte_rib_node *
+rte_rib_tree_insert(struct rte_rib *rib, uint32_t key, uint8_t depth)
+{
+	struct rte_rib_node **tmp = &rib->trie;
+	struct rte_rib_node *prev = NULL;
+	struct rte_rib_node *new_node = NULL;
+	struct rte_rib_node *common_node = NULL;
+	int d = 0;
+	uint32_t common_prefix;
+	uint8_t common_depth;
+
+	if (depth > 32) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	key &= rte_rib_depth_to_mask(depth);
+	new_node = rte_rib_tree_lookup_exact(rib, key, depth);
+	if (new_node != NULL) {
+		rte_errno = EEXIST;
+		return NULL;
+	}
+
+	new_node = rte_rib_node_alloc(rib);
+	if (new_node == NULL) {
+		rte_errno = ENOMEM;
+		return NULL;
+	}
+	new_node->left = NULL;
+	new_node->right = NULL;
+	new_node->parent = NULL;
+	new_node->key = key;
+	new_node->depth = depth;
+	new_node->flag = RTE_RIB_VALID_NODE;
+
+	/* traverse down the tree to find matching node or closest matching */
+	while (1) {
+		/* insert as the last node in the branch */
+		if (*tmp == NULL) {
+			*tmp = new_node;
+			new_node->parent = prev;
+			++rib->cur_routes;
+			return *tmp;
+		}
+		/**
+		 * Intermediate node found.
+		 * Previous rte_rib_tree_lookup_exact() returned NULL
+		 * but node with proper search criteria is found.
+		 * Validate intermediate node and return.
+		 */
+		if ((key == (*tmp)->key) && (depth == (*tmp)->depth)) {
+			rte_rib_node_free(rib, new_node);
+			(*tmp)->flag |= RTE_RIB_VALID_NODE;
+			++rib->cur_routes;
+			return *tmp;
+		}
+		d = (*tmp)->depth;
+		if ((d >= depth) || (((uint64_t)key >> (32 - d)) !=
+				((uint64_t)(*tmp)->key >> (32 - d))))
+			break;
+		prev = *tmp;
+		tmp = (key & (1 << (31 - d))) ? &(*tmp)->right : &(*tmp)->left;
+	}
+	/* closest node found, new_node should be inserted in the middle */
+	common_depth = RTE_MIN(depth, (*tmp)->depth);
+	common_prefix = key ^ (*tmp)->key;
+	d = __builtin_clz(common_prefix);
+
+	common_depth = RTE_MIN(d, common_depth);
+	common_prefix = key & rte_rib_depth_to_mask(common_depth);
+	if ((common_prefix == key) && (common_depth == depth)) {
+		/* insert as a parent */
+		if ((*tmp)->key & (1 << (31 - depth)))
+			new_node->right = *tmp;
+		else
+			new_node->left = *tmp;
+		new_node->parent = (*tmp)->parent;
+		(*tmp)->parent = new_node;
+		*tmp = new_node;
+	} else {
+		/* create intermediate node */
+		common_node = rte_rib_node_alloc(rib);
+		if (common_node == NULL) {
+			rte_rib_node_free(rib, new_node);
+			rte_errno = ENOMEM;
+			return NULL;
+		}
+		common_node->key = common_prefix;
+		common_node->depth = common_depth;
+		common_node->flag = 0;
+		common_node->parent = (*tmp)->parent;
+		new_node->parent = common_node;
+		(*tmp)->parent = common_node;
+		if ((new_node->key & (1 << (31 - common_depth))) == 0) {
+			common_node->left = new_node;
+			common_node->right = *tmp;
+		} else {
+			common_node->left = *tmp;
+			common_node->right = new_node;
+		}
+		*tmp = common_node;
+	}
+	++rib->cur_routes;
+	return new_node;
+}
+
+struct rte_rib *
+rte_rib_create(const char *name, int socket_id, struct rte_rib_conf *conf)
+{
+	char mem_name[RTE_RIB_NAMESIZE];
+	struct rte_rib *rib = NULL;
+	struct rte_tailq_entry *te;
+	struct rte_rib_list *rib_list;
+	struct rte_mempool *node_pool;
+
+	/* Check user arguments. */
+	if ((name == NULL) || (conf == NULL) || (socket_id < -1) ||
+			(conf->type >= RTE_RIB_TYPE_MAX) ||
+			(conf->max_nodes == 0) ||
+			(conf->node_sz < sizeof(struct rte_rib_node))) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	snprintf(mem_name, sizeof(mem_name), "MP_%s", name);
+	node_pool = rte_mempool_create(mem_name, conf->max_nodes,
+		conf->node_sz, 0, 0, NULL, NULL, NULL, NULL, socket_id, 0);
+
+	if (node_pool == NULL) {
+		RTE_LOG(ERR, LPM,
+			"Can not allocate mempool for RIB %s\n", name);
+		rte_errno = ENOMEM;
+		return NULL;
+	}
+
+	snprintf(mem_name, sizeof(mem_name), "RIB_%s", name);
+	rib_list = RTE_TAILQ_CAST(rte_rib_tailq.head, rte_rib_list);
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* guarantee there's no existing */
+	TAILQ_FOREACH(te, rib_list, next) {
+		rib = (struct rte_rib *)te->data;
+		if (strncmp(name, rib->name, RTE_RIB_NAMESIZE) == 0)
+			break;
+	}
+	rib = NULL;
+	if (te != NULL) {
+		rte_errno = EEXIST;
+		goto exit;
+	}
+
+	/* allocate tailq entry */
+	te = rte_zmalloc("RIB_TAILQ_ENTRY", sizeof(*te), 0);
+	if (te == NULL) {
+		RTE_LOG(ERR, LPM,
+			"Can not allocate tailq entry for RIB %s\n", name);
+		rte_errno = ENOMEM;
+		goto exit;
+	}
+
+	/* Allocate memory to store the LPM data structures. */
+	rib = (struct rte_rib *)rte_zmalloc_socket(mem_name,
+		sizeof(struct rte_rib),	RTE_CACHE_LINE_SIZE, socket_id);
+	if (rib == NULL) {
+		RTE_LOG(ERR, LPM, "RIB %s memory allocation failed\n", name);
+		rte_errno = ENOMEM;
+		goto free_te;
+	}
+
+	snprintf(rib->name, sizeof(rib->name), "%s", name);
+	rib->trie = NULL;
+	rib->max_nodes = conf->max_nodes;
+	rib->node_sz = conf->node_sz;
+	rib->type = conf->type;
+	rib->node_pool = node_pool;
+
+	switch (conf->type) {
+	case RTE_RIB_DIR24_8:
+		rib->lookup = rte_dir24_8_get_lookup_fn(conf);
+		rib->modify = rte_dir24_8_modify;
+		rib->fib = (void *)rte_dir24_8_create(name, socket_id, conf);
+		if (rib->fib == NULL)
+			goto free_rib;
+		break;
+	case RTE_RIB_TYPE_MAX:
+	default:
+		RTE_LOG(ERR, LPM, "Bad RIB %s type\n", name);
+		rte_errno = EINVAL;
+		goto free_rib;
+	}
+
+	te->data = (void *)rib;
+	TAILQ_INSERT_TAIL(rib_list, te, next);
+
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	return rib;
+
+free_rib:
+	rte_free(rib);
+free_te:
+	rte_free(te);
+exit:
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+	rte_mempool_free(node_pool);
+
+	return NULL;
+}
+
+struct rte_rib *
+rte_rib_find_existing(const char *name)
+{
+	struct rte_rib *rib = NULL;
+	struct rte_tailq_entry *te;
+	struct rte_rib_list *rib_list;
+
+	rib_list = RTE_TAILQ_CAST(rte_rib_tailq.head, rte_rib_list);
+
+	rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
+	TAILQ_FOREACH(te, rib_list, next) {
+		rib = (struct rte_rib *) te->data;
+		if (strncmp(name, rib->name, RTE_RIB_NAMESIZE) == 0)
+			break;
+	}
+	rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	if (te == NULL) {
+		rte_errno = ENOENT;
+		return NULL;
+	}
+
+	return rib;
+}
+
+void
+rte_rib_free(struct rte_rib *rib)
+{
+	struct rte_tailq_entry *te;
+	struct rte_rib_list *rib_list;
+	struct rte_rib_node *tmp = NULL;
+
+	if (rib == NULL)
+		return;
+
+	rib_list = RTE_TAILQ_CAST(rte_rib_tailq.head, rte_rib_list);
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* find our tailq entry */
+	TAILQ_FOREACH(te, rib_list, next) {
+		if (te->data == (void *)rib)
+			break;
+	}
+	if (te != NULL)
+		TAILQ_REMOVE(rib_list, te, next);
+
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	while ((tmp = rte_rib_tree_get_nxt(rib, 0, 0, tmp,
+			RTE_RIB_GET_NXT_ALL)) != NULL)
+		rte_rib_tree_remove(rib, tmp->key, tmp->depth);
+
+	rte_mempool_free(rib->node_pool);
+
+	switch (rib->type) {
+	case RTE_RIB_DIR24_8:
+		rte_dir24_8_free(rib->fib);
+		break;
+	default:
+		break;
+	}
+
+	rte_free(rib);
+	rte_free(te);
+}
+
+int
+rte_rib_add(struct rte_rib *rib, uint32_t ip, uint8_t depth, uint64_t next_hop)
+{
+	if ((rib == NULL) || (depth > RTE_RIB_MAXDEPTH))
+		return -EINVAL;
+
+	return rib->modify(rib, ip, depth, next_hop, RTE_RIB_ADD);
+}
+
+int
+rte_rib_delete(struct rte_rib *rib, uint32_t ip, uint8_t depth)
+{
+	if ((rib == NULL) || (depth > RTE_RIB_MAXDEPTH))
+		return -EINVAL;
+
+	return rib->modify(rib, ip, depth, 0, RTE_RIB_DEL);
+}
+
+int
+rte_rib_fib_lookup_bulk(struct rte_rib *rib, uint32_t *ips,
+	uint64_t *next_hops, int n)
+{
+	return rib->lookup(rib->fib, ips, next_hops, n);
+}
+
+void *
+rte_rib_get_fibp(struct rte_rib *rib)
+{
+	return rib->fib;
+}
diff --git a/lib/librte_rib/rte_rib.h b/lib/librte_rib/rte_rib.h
new file mode 100644
index 0000000..404deb2
--- /dev/null
+++ b/lib/librte_rib/rte_rib.h
@@ -0,0 +1,302 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Vladimir Medvedkin <medvedkinv@gmail.com>
+ */
+
+#ifndef _RTE_RIB_H_
+#define _RTE_RIB_H_
+
+/**
+ * @file
+ * Compressed trie implementation for Longest Prefix Match
+ */
+
+/** @internal Macro to enable/disable run-time checks. */
+#if defined(RTE_LIBRTE_RIB_DEBUG)
+#define RTE_RIB_RETURN_IF_TRUE(cond, retval) do {	\
+	if (cond)					\
+		return retval;				\
+} while (0)
+#else
+#define RTE_RIB_RETURN_IF_TRUE(cond, retval)
+#endif
+
+#define RTE_RIB_VALID_NODE	1
+#define RTE_RIB_GET_NXT_ALL	0
+#define RTE_RIB_GET_NXT_COVER	1
+
+/** Max number of characters in RIB name. */
+#define RTE_RIB_NAMESIZE	64
+
+/** Maximum depth value possible for IPv4 RIB. */
+#define RTE_RIB_MAXDEPTH	32
+
+struct rte_rib;
+
+static inline uint32_t __attribute__((pure))
+rte_rib_depth_to_mask(uint8_t depth)
+{
+	return (uint32_t)(UINT64_MAX << (32 - depth));
+}
+
+struct rte_rib_node {
+	struct rte_rib_node *left;
+	struct rte_rib_node *right;
+	struct rte_rib_node *parent;
+	uint32_t	key;
+	uint8_t		depth;
+	uint8_t		flag;
+	uint64_t	nh;
+	uint64_t	ext[0];
+};
+
+/** Type of FIB struct*/
+enum rte_rib_type {
+	RTE_RIB_DIR24_8,
+	RTE_RIB_TYPE_MAX
+};
+
+enum rte_rib_op {
+	RTE_RIB_ADD,
+	RTE_RIB_DEL
+};
+
+typedef int (*rte_rib_modify_fn_t)(struct rte_rib *rib, uint32_t key,
+	uint8_t depth, uint64_t next_hop, enum rte_rib_op op);
+typedef int (*rte_rib_lookup_fn_t)(void *fib, const uint32_t *ips,
+	uint64_t *next_hops, const unsigned int n);
+
+/** Size of nexthop (1 << nh_sz) bits */
+enum rte_dir24_8_nh_sz {
+	RTE_DIR24_8_1B,
+	RTE_DIR24_8_2B,
+	RTE_DIR24_8_4B,
+	RTE_DIR24_8_8B
+};
+
+/** DIR24_8 FIB configuration structure */
+struct rte_rib_dir24_8_conf {
+	uint64_t	def_nh;
+	uint32_t	num_tbl8;
+	enum rte_dir24_8_nh_sz	nh_sz;
+};
+
+/** RIB configuration structure */
+struct rte_rib_conf {
+	enum rte_rib_type	type;
+	int	max_nodes;
+	size_t	node_sz;
+	union {
+		struct rte_rib_dir24_8_conf dir24_8;
+	} fib_conf;
+};
+
+/**
+ * Lookup an IP into the RIB structure
+ *
+ * @param rib
+ *  RIB object handle
+ * @param key
+ *  IP to be looked up in the RIB
+ * @return
+ *  pointer to struct rte_rib_node on success,
+ *  NULL otherwise
+ */
+struct rte_rib_node *
+rte_rib_tree_lookup(struct rte_rib *rib, uint32_t key);
+
+/**
+ * Lookup less specific route into the RIB structure
+ *
+ * @param ent
+ *  Pointer to struct rte_rib_node that represents target route
+ * @return
+ *  pointer to struct rte_rib_node that represents
+ *  less specific route on success,
+ *  NULL otherwise
+ */
+struct rte_rib_node *
+rte_rib_tree_lookup_parent(struct rte_rib_node *ent);
+
+/**
+ * Lookup prefix into the RIB structure
+ *
+ * @param rib
+ *  RIB object handle
+ * @param key
+ *  net to be looked up in the RIB
+ * @param depth
+ *  prefix length
+ * @return
+ *  pointer to struct rte_rib_node on success,
+ *  NULL otherwise
+ */
+struct rte_rib_node *
+rte_rib_tree_lookup_exact(struct rte_rib *rib, uint32_t key, uint8_t depth);
+
+/**
+ * Retrieve next more specific prefix from the RIB
+ * that is covered by key/depth supernet
+ *
+ * @param rib
+ *  RIB object handle
+ * @param key
+ *  net address of supernet prefix that covers returned more specific prefixes
+ * @param depth
+ *  supernet prefix length
+ * @param last
+ *   pointer to the last returned prefix to get next prefix
+ *   or
+ *   NULL to get first more specific prefix
+ * @param flag
+ *  -RTE_RIB_GET_NXT_ALL
+ *   get all prefixes from subtrie
+ *  -RTE_RIB_GET_NXT_COVER
+ *   get only first more specific prefix even if it have more specifics
+ * @return
+ *  pointer to the next more specific prefix
+ *  or
+ *  NULL if there is no prefixes left
+ */
+struct rte_rib_node *
+rte_rib_tree_get_nxt(struct rte_rib *rib, uint32_t key, uint8_t depth,
+	struct rte_rib_node *last, int flag);
+
+/**
+ * Remove prefix from the RIB
+ *
+ * @param rib
+ *  RIB object handle
+ * @param key
+ *  net to be removed from the RIB
+ * @param depth
+ *  prefix length
+ */
+void
+rte_rib_tree_remove(struct rte_rib *rib, uint32_t key, uint8_t depth);
+
+/**
+ * Insert prefix into the RIB
+ *
+ * @param rib
+ *  RIB object handle
+ * @param key
+ *  net to be inserted to the RIB
+ * @param depth
+ *  prefix length
+ * @return
+ *  pointer to new rte_rib_node on success
+ *  NULL otherwise
+ */
+struct rte_rib_node *
+rte_rib_tree_insert(struct rte_rib *rib, uint32_t key, uint8_t depth);
+
+/**
+ * Create RIB
+ *
+ * @param name
+ *  RIB name
+ * @param socket_id
+ *  NUMA socket ID for RIB table memory allocation
+ * @param conf
+ *  Structure containing the configuration
+ * @return
+ *  Handle to RIB object on success
+ *  NULL otherwise with rte_errno set to an appropriate values.
+ */
+struct rte_rib *
+rte_rib_create(const char *name, int socket_id, struct rte_rib_conf *conf);
+
+/**
+ * Find an existing RIB object and return a pointer to it.
+ *
+ * @param name
+ *  Name of the rib object as passed to rte_rib_create()
+ * @return
+ *  Pointer to rib object or NULL if object not found with rte_errno
+ *  set appropriately. Possible rte_errno values include:
+ *   - ENOENT - required entry not available to return.
+ */
+struct rte_rib *
+rte_rib_find_existing(const char *name);
+
+/**
+ * Free an RIB object.
+ *
+ * @param rib
+ *   RIB object handle
+ * @return
+ *   None
+ */
+void
+rte_rib_free(struct rte_rib *rib);
+
+/**
+ * Add a rule to the RIB.
+ *
+ * @param rib
+ *   RIB object handle
+ * @param ip
+ *   IP of the rule to be added to the RIB
+ * @param depth
+ *   Depth of the rule to be added to the RIB
+ * @param next_hop
+ *   Next hop of the rule to be added to the RIB
+ * @return
+ *   0 on success, negative value otherwise
+ */
+int
+rte_rib_add(struct rte_rib *rib, uint32_t ip, uint8_t depth, uint64_t next_hop);
+
+/**
+ * Delete a rule from the RIB.
+ *
+ * @param rib
+ *   RIB object handle
+ * @param ip
+ *   IP of the rule to be deleted from the RIB
+ * @param depth
+ *   Depth of the rule to be deleted from the RIB
+ * @return
+ *   0 on success, negative value otherwise
+ */
+int
+rte_rib_delete(struct rte_rib *rib, uint32_t ip, uint8_t depth);
+
+/**
+ * Lookup multiple IP addresses in an FIB. This may be implemented as a
+ * macro, so the address of the function should not be used.
+ *
+ * @param RIB
+ *   RIB object handle
+ * @param ips
+ *   Array of IPs to be looked up in the FIB
+ * @param next_hops
+ *   Next hop of the most specific rule found for IP.
+ *   This is an array of eight byte values.
+ *   If the lookup for the given IP failed, then corresponding element would
+ *   contain default value, see description of then next parameter.
+ * @param n
+ *   Number of elements in ips (and next_hops) array to lookup. This should be a
+ *   compile time constant, and divisible by 8 for best performance.
+ * @param defv
+ *   Default value to populate into corresponding element of hop[] array,
+ *   if lookup would fail.
+ *  @return
+ *   -EINVAL for incorrect arguments, otherwise 0
+ */
+int
+rte_rib_fib_lookup_bulk(struct rte_rib *rib, uint32_t *ips,
+		uint64_t *next_hops, int n);
+
+/**
+ * Function to retrieve pointer to fib struct
+ *
+ * @param RIB
+ *   RIB object handle
+ * @return
+ *   pointer to fib
+ */
+void *
+rte_rib_get_fibp(struct rte_rib *rib);
+
+#endif /* _RTE_RIB_H_ */
diff --git a/lib/librte_rib/rte_rib_version.map b/lib/librte_rib/rte_rib_version.map
new file mode 100644
index 0000000..b193d6c
--- /dev/null
+++ b/lib/librte_rib/rte_rib_version.map
@@ -0,0 +1,18 @@
+DPDK_17.08 {
+	global:
+
+	rte_rib_create;
+	rte_rib_free;
+	rte_rib_tree_lookup;
+	rte_rib_tree_lookup_parent;
+	rte_rib_tree_lookup_exact;
+	rte_rib_tree_get_nxt;
+	rte_rib_tree_remove;
+	rte_rib_tree_insert;
+	rte_rib_find_existing;
+	rte_rib_add;
+	rte_rib_delete;
+	rte_rib_delete_all;
+
+	local: *;
+};
diff --git a/lib/meson.build b/lib/meson.build
index 73d6f25..6d06304 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -20,7 +20,7 @@ libraries = [ 'compat', # just a header, used for versioning
 	'gro', 'gso', 'ip_frag', 'jobstats',
 	'kni', 'latencystats', 'lpm', 'member',
 	'meter', 'power', 'pdump', 'rawdev',
-	'reorder', 'sched', 'security', 'vhost',
+	'reorder', 'rib', 'sched', 'security', 'vhost',
 	# add pkt framework libs which use other libs from above
 	'port', 'table', 'pipeline',
 	# flow_classify lib depends on pkt framework table lib
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index a145791..b7c5cce 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -70,6 +70,7 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_GRO)            += -lrte_gro
 _LDLIBS-$(CONFIG_RTE_LIBRTE_GSO)            += -lrte_gso
 _LDLIBS-$(CONFIG_RTE_LIBRTE_METER)          += -lrte_meter
 _LDLIBS-$(CONFIG_RTE_LIBRTE_LPM)            += -lrte_lpm
+_LDLIBS-$(CONFIG_RTE_LIBRTE_RIB)            += -lrte_rib
 # librte_acl needs --whole-archive because of weak functions
 _LDLIBS-$(CONFIG_RTE_LIBRTE_ACL)            += --whole-archive
 _LDLIBS-$(CONFIG_RTE_LIBRTE_ACL)            += -lrte_acl
-- 
1.8.3.1