Imported upstream release 16.04

* gbp import-orig ../dpdk-16.04.tar.xz

Change-Id: Iac2196db782ba322f6974d8a752acc34ce5024c3
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 1919 insertions, 0 deletions

diff --git a/lib/librte_lpm/rte_lpm.c b/lib/librte_lpm/rte_lpm.c
new file mode 100644
index 00000000..8bdf6065
--- /dev/null
+++ b/lib/librte_lpm/rte_lpm.c
@@ -0,0 +1,1919 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/queue.h>
+
+#include <rte_log.h>
+#include <rte_branch_prediction.h>
+#include <rte_common.h>
+#include <rte_memory.h>        /* for definition of RTE_CACHE_LINE_SIZE */
+#include <rte_malloc.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_per_lcore.h>
+#include <rte_string_fns.h>
+#include <rte_errno.h>
+#include <rte_rwlock.h>
+#include <rte_spinlock.h>
+
+#include "rte_lpm.h"
+
+TAILQ_HEAD(rte_lpm_list, rte_tailq_entry);
+
+static struct rte_tailq_elem rte_lpm_tailq = {
+	.name = "RTE_LPM",
+};
+EAL_REGISTER_TAILQ(rte_lpm_tailq)
+
+#define MAX_DEPTH_TBL24 24
+
+enum valid_flag {
+	INVALID = 0,
+	VALID
+};
+
+/* Macro to enable/disable run-time checks. */
+#if defined(RTE_LIBRTE_LPM_DEBUG)
+#include <rte_debug.h>
+#define VERIFY_DEPTH(depth) do {                                \
+	if ((depth == 0) || (depth > RTE_LPM_MAX_DEPTH))        \
+		rte_panic("LPM: Invalid depth (%u) at line %d", \
+				(unsigned)(depth), __LINE__);   \
+} while (0)
+#else
+#define VERIFY_DEPTH(depth)
+#endif
+
+/*
+ * Converts a given depth value to its corresponding mask value.
+ *
+ * depth  (IN)		: range = 1 - 32
+ * mask   (OUT)		: 32bit mask
+ */
+static uint32_t __attribute__((pure))
+depth_to_mask(uint8_t depth)
+{
+	VERIFY_DEPTH(depth);
+
+	/* To calculate a mask start with a 1 on the left hand side and right
+	 * shift while populating the left hand side with 1's
+	 */
+	return (int)0x80000000 >> (depth - 1);
+}
+
+/*
+ * Converts given depth value to its corresponding range value.
+ */
+static inline uint32_t __attribute__((pure))
+depth_to_range(uint8_t depth)
+{
+	VERIFY_DEPTH(depth);
+
+	/*
+	 * Calculate tbl24 range. (Note: 2^depth = 1 << depth)
+	 */
+	if (depth <= MAX_DEPTH_TBL24)
+		return 1 << (MAX_DEPTH_TBL24 - depth);
+
+	/* Else if depth is greater than 24 */
+	return 1 << (RTE_LPM_MAX_DEPTH - depth);
+}
+
+/*
+ * Find an existing lpm table and return a pointer to it.
+ */
+struct rte_lpm_v20 *
+rte_lpm_find_existing_v20(const char *name)
+{
+	struct rte_lpm_v20 *l = NULL;
+	struct rte_tailq_entry *te;
+	struct rte_lpm_list *lpm_list;
+
+	lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
+
+	rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
+	TAILQ_FOREACH(te, lpm_list, next) {
+		l = (struct rte_lpm_v20 *) te->data;
+		if (strncmp(name, l->name, RTE_LPM_NAMESIZE) == 0)
+			break;
+	}
+	rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	if (te == NULL) {
+		rte_errno = ENOENT;
+		return NULL;
+	}
+
+	return l;
+}
+VERSION_SYMBOL(rte_lpm_find_existing, _v20, 2.0);
+
+struct rte_lpm *
+rte_lpm_find_existing_v1604(const char *name)
+{
+	struct rte_lpm *l = NULL;
+	struct rte_tailq_entry *te;
+	struct rte_lpm_list *lpm_list;
+
+	lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
+
+	rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
+	TAILQ_FOREACH(te, lpm_list, next) {
+		l = (struct rte_lpm *) te->data;
+		if (strncmp(name, l->name, RTE_LPM_NAMESIZE) == 0)
+			break;
+	}
+	rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	if (te == NULL) {
+		rte_errno = ENOENT;
+		return NULL;
+	}
+
+	return l;
+}
+BIND_DEFAULT_SYMBOL(rte_lpm_find_existing, _v1604, 16.04);
+MAP_STATIC_SYMBOL(struct rte_lpm *rte_lpm_find_existing(const char *name),
+		rte_lpm_find_existing_v1604);
+
+/*
+ * Allocates memory for LPM object
+ */
+struct rte_lpm_v20 *
+rte_lpm_create_v20(const char *name, int socket_id, int max_rules,
+		__rte_unused int flags)
+{
+	char mem_name[RTE_LPM_NAMESIZE];
+	struct rte_lpm_v20 *lpm = NULL;
+	struct rte_tailq_entry *te;
+	uint32_t mem_size;
+	struct rte_lpm_list *lpm_list;
+
+	lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
+
+	RTE_BUILD_BUG_ON(sizeof(struct rte_lpm_tbl_entry_v20) != 2);
+
+	/* Check user arguments. */
+	if ((name == NULL) || (socket_id < -1) || (max_rules == 0)) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	snprintf(mem_name, sizeof(mem_name), "LPM_%s", name);
+
+	/* Determine the amount of memory to allocate. */
+	mem_size = sizeof(*lpm) + (sizeof(lpm->rules_tbl[0]) * max_rules);
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* guarantee there's no existing */
+	TAILQ_FOREACH(te, lpm_list, next) {
+		lpm = (struct rte_lpm_v20 *) te->data;
+		if (strncmp(name, lpm->name, RTE_LPM_NAMESIZE) == 0)
+			break;
+	}
+	lpm = NULL;
+	if (te != NULL) {
+		rte_errno = EEXIST;
+		goto exit;
+	}
+
+	/* allocate tailq entry */
+	te = rte_zmalloc("LPM_TAILQ_ENTRY", sizeof(*te), 0);
+	if (te == NULL) {
+		RTE_LOG(ERR, LPM, "Failed to allocate tailq entry\n");
+		goto exit;
+	}
+
+	/* Allocate memory to store the LPM data structures. */
+	lpm = (struct rte_lpm_v20 *)rte_zmalloc_socket(mem_name, mem_size,
+			RTE_CACHE_LINE_SIZE, socket_id);
+	if (lpm == NULL) {
+		RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
+		rte_free(te);
+		goto exit;
+	}
+
+	/* Save user arguments. */
+	lpm->max_rules = max_rules;
+	snprintf(lpm->name, sizeof(lpm->name), "%s", name);
+
+	te->data = (void *) lpm;
+
+	TAILQ_INSERT_TAIL(lpm_list, te, next);
+
+exit:
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	return lpm;
+}
+VERSION_SYMBOL(rte_lpm_create, _v20, 2.0);
+
+struct rte_lpm *
+rte_lpm_create_v1604(const char *name, int socket_id,
+		const struct rte_lpm_config *config)
+{
+	char mem_name[RTE_LPM_NAMESIZE];
+	struct rte_lpm *lpm = NULL;
+	struct rte_tailq_entry *te;
+	uint32_t mem_size, rules_size, tbl8s_size;
+	struct rte_lpm_list *lpm_list;
+
+	lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
+
+	RTE_BUILD_BUG_ON(sizeof(struct rte_lpm_tbl_entry) != 4);
+
+	/* Check user arguments. */
+	if ((name == NULL) || (socket_id < -1) || (config->max_rules == 0)
+			|| config->number_tbl8s > RTE_LPM_MAX_TBL8_NUM_GROUPS) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	snprintf(mem_name, sizeof(mem_name), "LPM_%s", name);
+
+	/* Determine the amount of memory to allocate. */
+	mem_size = sizeof(*lpm);
+	rules_size = sizeof(struct rte_lpm_rule) * config->max_rules;
+	tbl8s_size = (sizeof(struct rte_lpm_tbl_entry) *
+			RTE_LPM_TBL8_GROUP_NUM_ENTRIES * config->number_tbl8s);
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* guarantee there's no existing */
+	TAILQ_FOREACH(te, lpm_list, next) {
+		lpm = (struct rte_lpm *) te->data;
+		if (strncmp(name, lpm->name, RTE_LPM_NAMESIZE) == 0)
+			break;
+	}
+	lpm = NULL;
+	if (te != NULL) {
+		rte_errno = EEXIST;
+		goto exit;
+	}
+
+	/* allocate tailq entry */
+	te = rte_zmalloc("LPM_TAILQ_ENTRY", sizeof(*te), 0);
+	if (te == NULL) {
+		RTE_LOG(ERR, LPM, "Failed to allocate tailq entry\n");
+		goto exit;
+	}
+
+	/* Allocate memory to store the LPM data structures. */
+	lpm = (struct rte_lpm *)rte_zmalloc_socket(mem_name, mem_size,
+			RTE_CACHE_LINE_SIZE, socket_id);
+	if (lpm == NULL) {
+		RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
+		rte_free(te);
+		goto exit;
+	}
+
+	lpm->rules_tbl = (struct rte_lpm_rule *)rte_zmalloc_socket(NULL,
+			(size_t)rules_size, RTE_CACHE_LINE_SIZE, socket_id);
+
+	if (lpm->rules_tbl == NULL) {
+		RTE_LOG(ERR, LPM, "LPM rules_tbl memory allocation failed\n");
+		rte_free(lpm);
+		lpm = NULL;
+		rte_free(te);
+		goto exit;
+	}
+
+	lpm->tbl8 = (struct rte_lpm_tbl_entry *)rte_zmalloc_socket(NULL,
+			(size_t)tbl8s_size, RTE_CACHE_LINE_SIZE, socket_id);
+
+	if (lpm->tbl8 == NULL) {
+		RTE_LOG(ERR, LPM, "LPM tbl8 memory allocation failed\n");
+		rte_free(lpm);
+		lpm = NULL;
+		rte_free(te);
+		goto exit;
+	}
+
+	/* Save user arguments. */
+	lpm->max_rules = config->max_rules;
+	lpm->number_tbl8s = config->number_tbl8s;
+	snprintf(lpm->name, sizeof(lpm->name), "%s", name);
+
+	te->data = (void *) lpm;
+
+	TAILQ_INSERT_TAIL(lpm_list, te, next);
+
+exit:
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	return lpm;
+}
+BIND_DEFAULT_SYMBOL(rte_lpm_create, _v1604, 16.04);
+MAP_STATIC_SYMBOL(
+	struct rte_lpm *rte_lpm_create(const char *name, int socket_id,
+			const struct rte_lpm_config *config), rte_lpm_create_v1604);
+
+/*
+ * Deallocates memory for given LPM table.
+ */
+void
+rte_lpm_free_v20(struct rte_lpm_v20 *lpm)
+{
+	struct rte_lpm_list *lpm_list;
+	struct rte_tailq_entry *te;
+
+	/* Check user arguments. */
+	if (lpm == NULL)
+		return;
+
+	lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* find our tailq entry */
+	TAILQ_FOREACH(te, lpm_list, next) {
+		if (te->data == (void *) lpm)
+			break;
+	}
+	if (te != NULL)
+		TAILQ_REMOVE(lpm_list, te, next);
+
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	rte_free(lpm->rules_tbl);
+	rte_free(lpm);
+	rte_free(te);
+}
+VERSION_SYMBOL(rte_lpm_free, _v20, 2.0);
+
+void
+rte_lpm_free_v1604(struct rte_lpm *lpm)
+{
+	struct rte_lpm_list *lpm_list;
+	struct rte_tailq_entry *te;
+
+	/* Check user arguments. */
+	if (lpm == NULL)
+		return;
+
+	lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* find our tailq entry */
+	TAILQ_FOREACH(te, lpm_list, next) {
+		if (te->data == (void *) lpm)
+			break;
+	}
+	if (te != NULL)
+		TAILQ_REMOVE(lpm_list, te, next);
+
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	rte_free(lpm->rules_tbl);
+	rte_free(lpm);
+	rte_free(te);
+}
+BIND_DEFAULT_SYMBOL(rte_lpm_free, _v1604, 16.04);
+MAP_STATIC_SYMBOL(void rte_lpm_free(struct rte_lpm *lpm),
+		rte_lpm_free_v1604);
+
+/*
+ * Adds a rule to the rule table.
+ *
+ * NOTE: The rule table is split into 32 groups. Each group contains rules that
+ * apply to a specific prefix depth (i.e. group 1 contains rules that apply to
+ * prefixes with a depth of 1 etc.). In the following code (depth - 1) is used
+ * to refer to depth 1 because even though the depth range is 1 - 32, depths
+ * are stored in the rule table from 0 - 31.
+ * NOTE: Valid range for depth parameter is 1 .. 32 inclusive.
+ */
+static inline int32_t
+rule_add_v20(struct rte_lpm_v20 *lpm, uint32_t ip_masked, uint8_t depth,
+	uint8_t next_hop)
+{
+	uint32_t rule_gindex, rule_index, last_rule;
+	int i;
+
+	VERIFY_DEPTH(depth);
+
+	/* Scan through rule group to see if rule already exists. */
+	if (lpm->rule_info[depth - 1].used_rules > 0) {
+
+		/* rule_gindex stands for rule group index. */
+		rule_gindex = lpm->rule_info[depth - 1].first_rule;
+		/* Initialise rule_index to point to start of rule group. */
+		rule_index = rule_gindex;
+		/* Last rule = Last used rule in this rule group. */
+		last_rule = rule_gindex + lpm->rule_info[depth - 1].used_rules;
+
+		for (; rule_index < last_rule; rule_index++) {
+
+			/* If rule already exists update its next_hop and return. */
+			if (lpm->rules_tbl[rule_index].ip == ip_masked) {
+				lpm->rules_tbl[rule_index].next_hop = next_hop;
+
+				return rule_index;
+			}
+		}
+
+		if (rule_index == lpm->max_rules)
+			return -ENOSPC;
+	} else {
+		/* Calculate the position in which the rule will be stored. */
+		rule_index = 0;
+
+		for (i = depth - 1; i > 0; i--) {
+			if (lpm->rule_info[i - 1].used_rules > 0) {
+				rule_index = lpm->rule_info[i - 1].first_rule
+						+ lpm->rule_info[i - 1].used_rules;
+				break;
+			}
+		}
+		if (rule_index == lpm->max_rules)
+			return -ENOSPC;
+
+		lpm->rule_info[depth - 1].first_rule = rule_index;
+	}
+
+	/* Make room for the new rule in the array. */
+	for (i = RTE_LPM_MAX_DEPTH; i > depth; i--) {
+		if (lpm->rule_info[i - 1].first_rule
+				+ lpm->rule_info[i - 1].used_rules == lpm->max_rules)
+			return -ENOSPC;
+
+		if (lpm->rule_info[i - 1].used_rules > 0) {
+			lpm->rules_tbl[lpm->rule_info[i - 1].first_rule
+				+ lpm->rule_info[i - 1].used_rules]
+					= lpm->rules_tbl[lpm->rule_info[i - 1].first_rule];
+			lpm->rule_info[i - 1].first_rule++;
+		}
+	}
+
+	/* Add the new rule. */
+	lpm->rules_tbl[rule_index].ip = ip_masked;
+	lpm->rules_tbl[rule_index].next_hop = next_hop;
+
+	/* Increment the used rules counter for this rule group. */
+	lpm->rule_info[depth - 1].used_rules++;
+
+	return rule_index;
+}
+
+static inline int32_t
+rule_add_v1604(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
+	uint32_t next_hop)
+{
+	uint32_t rule_gindex, rule_index, last_rule;
+	int i;
+
+	VERIFY_DEPTH(depth);
+
+	/* Scan through rule group to see if rule already exists. */
+	if (lpm->rule_info[depth - 1].used_rules > 0) {
+
+		/* rule_gindex stands for rule group index. */
+		rule_gindex = lpm->rule_info[depth - 1].first_rule;
+		/* Initialise rule_index to point to start of rule group. */
+		rule_index = rule_gindex;
+		/* Last rule = Last used rule in this rule group. */
+		last_rule = rule_gindex + lpm->rule_info[depth - 1].used_rules;
+
+		for (; rule_index < last_rule; rule_index++) {
+
+			/* If rule already exists update its next_hop and return. */
+			if (lpm->rules_tbl[rule_index].ip == ip_masked) {
+				lpm->rules_tbl[rule_index].next_hop = next_hop;
+
+				return rule_index;
+			}
+		}
+
+		if (rule_index == lpm->max_rules)
+			return -ENOSPC;
+	} else {
+		/* Calculate the position in which the rule will be stored. */
+		rule_index = 0;
+
+		for (i = depth - 1; i > 0; i--) {
+			if (lpm->rule_info[i - 1].used_rules > 0) {
+				rule_index = lpm->rule_info[i - 1].first_rule
+						+ lpm->rule_info[i - 1].used_rules;
+				break;
+			}
+		}
+		if (rule_index == lpm->max_rules)
+			return -ENOSPC;
+
+		lpm->rule_info[depth - 1].first_rule = rule_index;
+	}
+
+	/* Make room for the new rule in the array. */
+	for (i = RTE_LPM_MAX_DEPTH; i > depth; i--) {
+		if (lpm->rule_info[i - 1].first_rule
+				+ lpm->rule_info[i - 1].used_rules == lpm->max_rules)
+			return -ENOSPC;
+
+		if (lpm->rule_info[i - 1].used_rules > 0) {
+			lpm->rules_tbl[lpm->rule_info[i - 1].first_rule
+				+ lpm->rule_info[i - 1].used_rules]
+					= lpm->rules_tbl[lpm->rule_info[i - 1].first_rule];
+			lpm->rule_info[i - 1].first_rule++;
+		}
+	}
+
+	/* Add the new rule. */
+	lpm->rules_tbl[rule_index].ip = ip_masked;
+	lpm->rules_tbl[rule_index].next_hop = next_hop;
+
+	/* Increment the used rules counter for this rule group. */
+	lpm->rule_info[depth - 1].used_rules++;
+
+	return rule_index;
+}
+
+/*
+ * Delete a rule from the rule table.
+ * NOTE: Valid range for depth parameter is 1 .. 32 inclusive.
+ */
+static inline void
+rule_delete_v20(struct rte_lpm_v20 *lpm, int32_t rule_index, uint8_t depth)
+{
+	int i;
+
+	VERIFY_DEPTH(depth);
+
+	lpm->rules_tbl[rule_index] =
+			lpm->rules_tbl[lpm->rule_info[depth - 1].first_rule
+				+ lpm->rule_info[depth - 1].used_rules - 1];
+
+	for (i = depth; i < RTE_LPM_MAX_DEPTH; i++) {
+		if (lpm->rule_info[i].used_rules > 0) {
+			lpm->rules_tbl[lpm->rule_info[i].first_rule - 1] =
+				lpm->rules_tbl[lpm->rule_info[i].first_rule
+					+ lpm->rule_info[i].used_rules - 1];
+			lpm->rule_info[i].first_rule--;
+		}
+	}
+
+	lpm->rule_info[depth - 1].used_rules--;
+}
+
+static inline void
+rule_delete_v1604(struct rte_lpm *lpm, int32_t rule_index, uint8_t depth)
+{
+	int i;
+
+	VERIFY_DEPTH(depth);
+
+	lpm->rules_tbl[rule_index] =
+			lpm->rules_tbl[lpm->rule_info[depth - 1].first_rule
+			+ lpm->rule_info[depth - 1].used_rules - 1];
+
+	for (i = depth; i < RTE_LPM_MAX_DEPTH; i++) {
+		if (lpm->rule_info[i].used_rules > 0) {
+			lpm->rules_tbl[lpm->rule_info[i].first_rule - 1] =
+					lpm->rules_tbl[lpm->rule_info[i].first_rule
+						+ lpm->rule_info[i].used_rules - 1];
+			lpm->rule_info[i].first_rule--;
+		}
+	}
+
+	lpm->rule_info[depth - 1].used_rules--;
+}
+
+/*
+ * Finds a rule in rule table.
+ * NOTE: Valid range for depth parameter is 1 .. 32 inclusive.
+ */
+static inline int32_t
+rule_find_v20(struct rte_lpm_v20 *lpm, uint32_t ip_masked, uint8_t depth)
+{
+	uint32_t rule_gindex, last_rule, rule_index;
+
+	VERIFY_DEPTH(depth);
+
+	rule_gindex = lpm->rule_info[depth - 1].first_rule;
+	last_rule = rule_gindex + lpm->rule_info[depth - 1].used_rules;
+
+	/* Scan used rules at given depth to find rule. */
+	for (rule_index = rule_gindex; rule_index < last_rule; rule_index++) {
+		/* If rule is found return the rule index. */
+		if (lpm->rules_tbl[rule_index].ip == ip_masked)
+			return rule_index;
+	}
+
+	/* If rule is not found return -EINVAL. */
+	return -EINVAL;
+}
+
+static inline int32_t
+rule_find_v1604(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth)
+{
+	uint32_t rule_gindex, last_rule, rule_index;
+
+	VERIFY_DEPTH(depth);
+
+	rule_gindex = lpm->rule_info[depth - 1].first_rule;
+	last_rule = rule_gindex + lpm->rule_info[depth - 1].used_rules;
+
+	/* Scan used rules at given depth to find rule. */
+	for (rule_index = rule_gindex; rule_index < last_rule; rule_index++) {
+		/* If rule is found return the rule index. */
+		if (lpm->rules_tbl[rule_index].ip == ip_masked)
+			return rule_index;
+	}
+
+	/* If rule is not found return -EINVAL. */
+	return -EINVAL;
+}
+
+/*
+ * Find, clean and allocate a tbl8.
+ */
+static inline int32_t
+tbl8_alloc_v20(struct rte_lpm_tbl_entry_v20 *tbl8)
+{
+	uint32_t group_idx; /* tbl8 group index. */
+	struct rte_lpm_tbl_entry_v20 *tbl8_entry;
+
+	/* Scan through tbl8 to find a free (i.e. INVALID) tbl8 group. */
+	for (group_idx = 0; group_idx < RTE_LPM_TBL8_NUM_GROUPS;
+			group_idx++) {
+		tbl8_entry = &tbl8[group_idx * RTE_LPM_TBL8_GROUP_NUM_ENTRIES];
+		/* If a free tbl8 group is found clean it and set as VALID. */
+		if (!tbl8_entry->valid_group) {
+			memset(&tbl8_entry[0], 0,
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES *
+					sizeof(tbl8_entry[0]));
+
+			tbl8_entry->valid_group = VALID;
+
+			/* Return group index for allocated tbl8 group. */
+			return group_idx;
+		}
+	}
+
+	/* If there are no tbl8 groups free then return error. */
+	return -ENOSPC;
+}
+
+static inline int32_t
+tbl8_alloc_v1604(struct rte_lpm_tbl_entry *tbl8, uint32_t number_tbl8s)
+{
+	uint32_t group_idx; /* tbl8 group index. */
+	struct rte_lpm_tbl_entry *tbl8_entry;
+
+	/* Scan through tbl8 to find a free (i.e. INVALID) tbl8 group. */
+	for (group_idx = 0; group_idx < number_tbl8s; group_idx++) {
+		tbl8_entry = &tbl8[group_idx * RTE_LPM_TBL8_GROUP_NUM_ENTRIES];
+		/* If a free tbl8 group is found clean it and set as VALID. */
+		if (!tbl8_entry->valid_group) {
+			memset(&tbl8_entry[0], 0,
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES *
+					sizeof(tbl8_entry[0]));
+
+			tbl8_entry->valid_group = VALID;
+
+			/* Return group index for allocated tbl8 group. */
+			return group_idx;
+		}
+	}
+
+	/* If there are no tbl8 groups free then return error. */
+	return -ENOSPC;
+}
+
+static inline void
+tbl8_free_v20(struct rte_lpm_tbl_entry_v20 *tbl8, uint32_t tbl8_group_start)
+{
+	/* Set tbl8 group invalid*/
+	tbl8[tbl8_group_start].valid_group = INVALID;
+}
+
+static inline void
+tbl8_free_v1604(struct rte_lpm_tbl_entry *tbl8, uint32_t tbl8_group_start)
+{
+	/* Set tbl8 group invalid*/
+	tbl8[tbl8_group_start].valid_group = INVALID;
+}
+
+static inline int32_t
+add_depth_small_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth,
+		uint8_t next_hop)
+{
+	uint32_t tbl24_index, tbl24_range, tbl8_index, tbl8_group_end, i, j;
+
+	/* Calculate the index into Table24. */
+	tbl24_index = ip >> 8;
+	tbl24_range = depth_to_range(depth);
+
+	for (i = tbl24_index; i < (tbl24_index + tbl24_range); i++) {
+		/*
+		 * For invalid OR valid and non-extended tbl 24 entries set
+		 * entry.
+		 */
+		if (!lpm->tbl24[i].valid || (lpm->tbl24[i].valid_group == 0 &&
+				lpm->tbl24[i].depth <= depth)) {
+
+			struct rte_lpm_tbl_entry_v20 new_tbl24_entry = {
+				.valid = VALID,
+				.valid_group = 0,
+				.depth = depth,
+			};
+			new_tbl24_entry.next_hop = next_hop;
+
+			/* Setting tbl24 entry in one go to avoid race
+			 * conditions
+			 */
+			lpm->tbl24[i] = new_tbl24_entry;
+
+			continue;
+		}
+
+		if (lpm->tbl24[i].valid_group == 1) {
+			/* If tbl24 entry is valid and extended calculate the
+			 *  index into tbl8.
+			 */
+			tbl8_index = lpm->tbl24[i].group_idx *
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+			tbl8_group_end = tbl8_index +
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+			for (j = tbl8_index; j < tbl8_group_end; j++) {
+				if (!lpm->tbl8[j].valid ||
+						lpm->tbl8[j].depth <= depth) {
+					struct rte_lpm_tbl_entry_v20
+						new_tbl8_entry = {
+						.valid = VALID,
+						.valid_group = VALID,
+						.depth = depth,
+					};
+					new_tbl8_entry.next_hop = next_hop;
+
+					/*
+					 * Setting tbl8 entry in one go to avoid
+					 * race conditions
+					 */
+					lpm->tbl8[j] = new_tbl8_entry;
+
+					continue;
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+
+static inline int32_t
+add_depth_small_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+		uint32_t next_hop)
+{
+#define group_idx next_hop
+	uint32_t tbl24_index, tbl24_range, tbl8_index, tbl8_group_end, i, j;
+
+	/* Calculate the index into Table24. */
+	tbl24_index = ip >> 8;
+	tbl24_range = depth_to_range(depth);
+
+	for (i = tbl24_index; i < (tbl24_index + tbl24_range); i++) {
+		/*
+		 * For invalid OR valid and non-extended tbl 24 entries set
+		 * entry.
+		 */
+		if (!lpm->tbl24[i].valid || (lpm->tbl24[i].valid_group == 0 &&
+				lpm->tbl24[i].depth <= depth)) {
+
+			struct rte_lpm_tbl_entry new_tbl24_entry = {
+				.next_hop = next_hop,
+				.valid = VALID,
+				.valid_group = 0,
+				.depth = depth,
+			};
+
+			/* Setting tbl24 entry in one go to avoid race
+			 * conditions
+			 */
+			lpm->tbl24[i] = new_tbl24_entry;
+
+			continue;
+		}
+
+		if (lpm->tbl24[i].valid_group == 1) {
+			/* If tbl24 entry is valid and extended calculate the
+			 *  index into tbl8.
+			 */
+			tbl8_index = lpm->tbl24[i].group_idx *
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+			tbl8_group_end = tbl8_index +
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+			for (j = tbl8_index; j < tbl8_group_end; j++) {
+				if (!lpm->tbl8[j].valid ||
+						lpm->tbl8[j].depth <= depth) {
+					struct rte_lpm_tbl_entry
+						new_tbl8_entry = {
+						.valid = VALID,
+						.valid_group = VALID,
+						.depth = depth,
+						.next_hop = next_hop,
+					};
+
+					/*
+					 * Setting tbl8 entry in one go to avoid
+					 * race conditions
+					 */
+					lpm->tbl8[j] = new_tbl8_entry;
+
+					continue;
+				}
+			}
+		}
+	}
+#undef group_idx
+	return 0;
+}
+
+static inline int32_t
+add_depth_big_v20(struct rte_lpm_v20 *lpm, uint32_t ip_masked, uint8_t depth,
+		uint8_t next_hop)
+{
+	uint32_t tbl24_index;
+	int32_t tbl8_group_index, tbl8_group_start, tbl8_group_end, tbl8_index,
+		tbl8_range, i;
+
+	tbl24_index = (ip_masked >> 8);
+	tbl8_range = depth_to_range(depth);
+
+	if (!lpm->tbl24[tbl24_index].valid) {
+		/* Search for a free tbl8 group. */
+		tbl8_group_index = tbl8_alloc_v20(lpm->tbl8);
+
+		/* Check tbl8 allocation was successful. */
+		if (tbl8_group_index < 0) {
+			return tbl8_group_index;
+		}
+
+		/* Find index into tbl8 and range. */
+		tbl8_index = (tbl8_group_index *
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES) +
+				(ip_masked & 0xFF);
+
+		/* Set tbl8 entry. */
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+			lpm->tbl8[i].depth = depth;
+			lpm->tbl8[i].next_hop = next_hop;
+			lpm->tbl8[i].valid = VALID;
+		}
+
+		/*
+		 * Update tbl24 entry to point to new tbl8 entry. Note: The
+		 * ext_flag and tbl8_index need to be updated simultaneously,
+		 * so assign whole structure in one go
+		 */
+
+		struct rte_lpm_tbl_entry_v20 new_tbl24_entry = {
+			{ .group_idx = (uint8_t)tbl8_group_index, },
+			.valid = VALID,
+			.valid_group = 1,
+			.depth = 0,
+		};
+
+		lpm->tbl24[tbl24_index] = new_tbl24_entry;
+
+	} /* If valid entry but not extended calculate the index into Table8. */
+	else if (lpm->tbl24[tbl24_index].valid_group == 0) {
+		/* Search for free tbl8 group. */
+		tbl8_group_index = tbl8_alloc_v20(lpm->tbl8);
+
+		if (tbl8_group_index < 0) {
+			return tbl8_group_index;
+		}
+
+		tbl8_group_start = tbl8_group_index *
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+		tbl8_group_end = tbl8_group_start +
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+		/* Populate new tbl8 with tbl24 value. */
+		for (i = tbl8_group_start; i < tbl8_group_end; i++) {
+			lpm->tbl8[i].valid = VALID;
+			lpm->tbl8[i].depth = lpm->tbl24[tbl24_index].depth;
+			lpm->tbl8[i].next_hop =
+					lpm->tbl24[tbl24_index].next_hop;
+		}
+
+		tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
+
+		/* Insert new rule into the tbl8 entry. */
+		for (i = tbl8_index; i < tbl8_index + tbl8_range; i++) {
+			if (!lpm->tbl8[i].valid ||
+					lpm->tbl8[i].depth <= depth) {
+				lpm->tbl8[i].valid = VALID;
+				lpm->tbl8[i].depth = depth;
+				lpm->tbl8[i].next_hop = next_hop;
+
+				continue;
+			}
+		}
+
+		/*
+		 * Update tbl24 entry to point to new tbl8 entry. Note: The
+		 * ext_flag and tbl8_index need to be updated simultaneously,
+		 * so assign whole structure in one go.
+		 */
+
+		struct rte_lpm_tbl_entry_v20 new_tbl24_entry = {
+				{ .group_idx = (uint8_t)tbl8_group_index, },
+				.valid = VALID,
+				.valid_group = 1,
+				.depth = 0,
+		};
+
+		lpm->tbl24[tbl24_index] = new_tbl24_entry;
+
+	} else { /*
+		* If it is valid, extended entry calculate the index into tbl8.
+		*/
+		tbl8_group_index = lpm->tbl24[tbl24_index].group_idx;
+		tbl8_group_start = tbl8_group_index *
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+		tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
+
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+
+			if (!lpm->tbl8[i].valid ||
+					lpm->tbl8[i].depth <= depth) {
+				struct rte_lpm_tbl_entry_v20 new_tbl8_entry = {
+					.valid = VALID,
+					.depth = depth,
+					.valid_group = lpm->tbl8[i].valid_group,
+				};
+				new_tbl8_entry.next_hop = next_hop;
+				/*
+				 * Setting tbl8 entry in one go to avoid race
+				 * condition
+				 */
+				lpm->tbl8[i] = new_tbl8_entry;
+
+				continue;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static inline int32_t
+add_depth_big_v1604(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
+		uint32_t next_hop)
+{
+#define group_idx next_hop
+	uint32_t tbl24_index;
+	int32_t tbl8_group_index, tbl8_group_start, tbl8_group_end, tbl8_index,
+		tbl8_range, i;
+
+	tbl24_index = (ip_masked >> 8);
+	tbl8_range = depth_to_range(depth);
+
+	if (!lpm->tbl24[tbl24_index].valid) {
+		/* Search for a free tbl8 group. */
+		tbl8_group_index = tbl8_alloc_v1604(lpm->tbl8, lpm->number_tbl8s);
+
+		/* Check tbl8 allocation was successful. */
+		if (tbl8_group_index < 0) {
+			return tbl8_group_index;
+		}
+
+		/* Find index into tbl8 and range. */
+		tbl8_index = (tbl8_group_index *
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES) +
+				(ip_masked & 0xFF);
+
+		/* Set tbl8 entry. */
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+			lpm->tbl8[i].depth = depth;
+			lpm->tbl8[i].next_hop = next_hop;
+			lpm->tbl8[i].valid = VALID;
+		}
+
+		/*
+		 * Update tbl24 entry to point to new tbl8 entry. Note: The
+		 * ext_flag and tbl8_index need to be updated simultaneously,
+		 * so assign whole structure in one go
+		 */
+
+		struct rte_lpm_tbl_entry new_tbl24_entry = {
+			.group_idx = (uint8_t)tbl8_group_index,
+			.valid = VALID,
+			.valid_group = 1,
+			.depth = 0,
+		};
+
+		lpm->tbl24[tbl24_index] = new_tbl24_entry;
+
+	} /* If valid entry but not extended calculate the index into Table8. */
+	else if (lpm->tbl24[tbl24_index].valid_group == 0) {
+		/* Search for free tbl8 group. */
+		tbl8_group_index = tbl8_alloc_v1604(lpm->tbl8, lpm->number_tbl8s);
+
+		if (tbl8_group_index < 0) {
+			return tbl8_group_index;
+		}
+
+		tbl8_group_start = tbl8_group_index *
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+		tbl8_group_end = tbl8_group_start +
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+		/* Populate new tbl8 with tbl24 value. */
+		for (i = tbl8_group_start; i < tbl8_group_end; i++) {
+			lpm->tbl8[i].valid = VALID;
+			lpm->tbl8[i].depth = lpm->tbl24[tbl24_index].depth;
+			lpm->tbl8[i].next_hop =
+					lpm->tbl24[tbl24_index].next_hop;
+		}
+
+		tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
+
+		/* Insert new rule into the tbl8 entry. */
+		for (i = tbl8_index; i < tbl8_index + tbl8_range; i++) {
+			if (!lpm->tbl8[i].valid ||
+					lpm->tbl8[i].depth <= depth) {
+				lpm->tbl8[i].valid = VALID;
+				lpm->tbl8[i].depth = depth;
+				lpm->tbl8[i].next_hop = next_hop;
+
+				continue;
+			}
+		}
+
+		/*
+		 * Update tbl24 entry to point to new tbl8 entry. Note: The
+		 * ext_flag and tbl8_index need to be updated simultaneously,
+		 * so assign whole structure in one go.
+		 */
+
+		struct rte_lpm_tbl_entry new_tbl24_entry = {
+				.group_idx = (uint8_t)tbl8_group_index,
+				.valid = VALID,
+				.valid_group = 1,
+				.depth = 0,
+		};
+
+		lpm->tbl24[tbl24_index] = new_tbl24_entry;
+
+	} else { /*
+		* If it is valid, extended entry calculate the index into tbl8.
+		*/
+		tbl8_group_index = lpm->tbl24[tbl24_index].group_idx;
+		tbl8_group_start = tbl8_group_index *
+				RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+		tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
+
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+
+			if (!lpm->tbl8[i].valid ||
+					lpm->tbl8[i].depth <= depth) {
+				struct rte_lpm_tbl_entry new_tbl8_entry = {
+					.valid = VALID,
+					.depth = depth,
+					.next_hop = next_hop,
+					.valid_group = lpm->tbl8[i].valid_group,
+				};
+
+				/*
+				 * Setting tbl8 entry in one go to avoid race
+				 * condition
+				 */
+				lpm->tbl8[i] = new_tbl8_entry;
+
+				continue;
+			}
+		}
+	}
+#undef group_idx
+	return 0;
+}
+
+/*
+ * Add a route
+ */
+int
+rte_lpm_add_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth,
+		uint8_t next_hop)
+{
+	int32_t rule_index, status = 0;
+	uint32_t ip_masked;
+
+	/* Check user arguments. */
+	if ((lpm == NULL) || (depth < 1) || (depth > RTE_LPM_MAX_DEPTH))
+		return -EINVAL;
+
+	ip_masked = ip & depth_to_mask(depth);
+
+	/* Add the rule to the rule table. */
+	rule_index = rule_add_v20(lpm, ip_masked, depth, next_hop);
+
+	/* If the is no space available for new rule return error. */
+	if (rule_index < 0) {
+		return rule_index;
+	}
+
+	if (depth <= MAX_DEPTH_TBL24) {
+		status = add_depth_small_v20(lpm, ip_masked, depth, next_hop);
+	} else { /* If depth > RTE_LPM_MAX_DEPTH_TBL24 */
+		status = add_depth_big_v20(lpm, ip_masked, depth, next_hop);
+
+		/*
+		 * If add fails due to exhaustion of tbl8 extensions delete
+		 * rule that was added to rule table.
+		 */
+		if (status < 0) {
+			rule_delete_v20(lpm, rule_index, depth);
+
+			return status;
+		}
+	}
+
+	return 0;
+}
+VERSION_SYMBOL(rte_lpm_add, _v20, 2.0);
+
+int
+rte_lpm_add_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+		uint32_t next_hop)
+{
+	int32_t rule_index, status = 0;
+	uint32_t ip_masked;
+
+	/* Check user arguments. */
+	if ((lpm == NULL) || (depth < 1) || (depth > RTE_LPM_MAX_DEPTH))
+		return -EINVAL;
+
+	ip_masked = ip & depth_to_mask(depth);
+
+	/* Add the rule to the rule table. */
+	rule_index = rule_add_v1604(lpm, ip_masked, depth, next_hop);
+
+	/* If the is no space available for new rule return error. */
+	if (rule_index < 0) {
+		return rule_index;
+	}
+
+	if (depth <= MAX_DEPTH_TBL24) {
+		status = add_depth_small_v1604(lpm, ip_masked, depth, next_hop);
+	} else { /* If depth > RTE_LPM_MAX_DEPTH_TBL24 */
+		status = add_depth_big_v1604(lpm, ip_masked, depth, next_hop);
+
+		/*
+		 * If add fails due to exhaustion of tbl8 extensions delete
+		 * rule that was added to rule table.
+		 */
+		if (status < 0) {
+			rule_delete_v1604(lpm, rule_index, depth);
+
+			return status;
+		}
+	}
+
+	return 0;
+}
+BIND_DEFAULT_SYMBOL(rte_lpm_add, _v1604, 16.04);
+MAP_STATIC_SYMBOL(int rte_lpm_add(struct rte_lpm *lpm, uint32_t ip,
+		uint8_t depth, uint32_t next_hop), rte_lpm_add_v1604);
+
+/*
+ * Look for a rule in the high-level rules table
+ */
+int
+rte_lpm_is_rule_present_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth,
+uint8_t *next_hop)
+{
+	uint32_t ip_masked;
+	int32_t rule_index;
+
+	/* Check user arguments. */
+	if ((lpm == NULL) ||
+		(next_hop == NULL) ||
+		(depth < 1) || (depth > RTE_LPM_MAX_DEPTH))
+		return -EINVAL;
+
+	/* Look for the rule using rule_find. */
+	ip_masked = ip & depth_to_mask(depth);
+	rule_index = rule_find_v20(lpm, ip_masked, depth);
+
+	if (rule_index >= 0) {
+		*next_hop = lpm->rules_tbl[rule_index].next_hop;
+		return 1;
+	}
+
+	/* If rule is not found return 0. */
+	return 0;
+}
+VERSION_SYMBOL(rte_lpm_is_rule_present, _v20, 2.0);
+
+int
+rte_lpm_is_rule_present_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+uint32_t *next_hop)
+{
+	uint32_t ip_masked;
+	int32_t rule_index;
+
+	/* Check user arguments. */
+	if ((lpm == NULL) ||
+		(next_hop == NULL) ||
+		(depth < 1) || (depth > RTE_LPM_MAX_DEPTH))
+		return -EINVAL;
+
+	/* Look for the rule using rule_find. */
+	ip_masked = ip & depth_to_mask(depth);
+	rule_index = rule_find_v1604(lpm, ip_masked, depth);
+
+	if (rule_index >= 0) {
+		*next_hop = lpm->rules_tbl[rule_index].next_hop;
+		return 1;
+	}
+
+	/* If rule is not found return 0. */
+	return 0;
+}
+BIND_DEFAULT_SYMBOL(rte_lpm_is_rule_present, _v1604, 16.04);
+MAP_STATIC_SYMBOL(int rte_lpm_is_rule_present(struct rte_lpm *lpm, uint32_t ip,
+		uint8_t depth, uint32_t *next_hop), rte_lpm_is_rule_present_v1604);
+
+static inline int32_t
+find_previous_rule_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth,
+		uint8_t *sub_rule_depth)
+{
+	int32_t rule_index;
+	uint32_t ip_masked;
+	uint8_t prev_depth;
+
+	for (prev_depth = (uint8_t)(depth - 1); prev_depth > 0; prev_depth--) {
+		ip_masked = ip & depth_to_mask(prev_depth);
+
+		rule_index = rule_find_v20(lpm, ip_masked, prev_depth);
+
+		if (rule_index >= 0) {
+			*sub_rule_depth = prev_depth;
+			return rule_index;
+		}
+	}
+
+	return -1;
+}
+
+static inline int32_t
+find_previous_rule_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+		uint8_t *sub_rule_depth)
+{
+	int32_t rule_index;
+	uint32_t ip_masked;
+	uint8_t prev_depth;
+
+	for (prev_depth = (uint8_t)(depth - 1); prev_depth > 0; prev_depth--) {
+		ip_masked = ip & depth_to_mask(prev_depth);
+
+		rule_index = rule_find_v1604(lpm, ip_masked, prev_depth);
+
+		if (rule_index >= 0) {
+			*sub_rule_depth = prev_depth;
+			return rule_index;
+		}
+	}
+
+	return -1;
+}
+
+static inline int32_t
+delete_depth_small_v20(struct rte_lpm_v20 *lpm, uint32_t ip_masked,
+	uint8_t depth, int32_t sub_rule_index, uint8_t sub_rule_depth)
+{
+	uint32_t tbl24_range, tbl24_index, tbl8_group_index, tbl8_index, i, j;
+
+	/* Calculate the range and index into Table24. */
+	tbl24_range = depth_to_range(depth);
+	tbl24_index = (ip_masked >> 8);
+
+	/*
+	 * Firstly check the sub_rule_index. A -1 indicates no replacement rule
+	 * and a positive number indicates a sub_rule_index.
+	 */
+	if (sub_rule_index < 0) {
+		/*
+		 * If no replacement rule exists then invalidate entries
+		 * associated with this rule.
+		 */
+		for (i = tbl24_index; i < (tbl24_index + tbl24_range); i++) {
+
+			if (lpm->tbl24[i].valid_group == 0 &&
+					lpm->tbl24[i].depth <= depth) {
+				lpm->tbl24[i].valid = INVALID;
+			} else if (lpm->tbl24[i].valid_group == 1) {
+				/*
+				 * If TBL24 entry is extended, then there has
+				 * to be a rule with depth >= 25 in the
+				 * associated TBL8 group.
+				 */
+
+				tbl8_group_index = lpm->tbl24[i].group_idx;
+				tbl8_index = tbl8_group_index *
+						RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+				for (j = tbl8_index; j < (tbl8_index +
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES); j++) {
+
+					if (lpm->tbl8[j].depth <= depth)
+						lpm->tbl8[j].valid = INVALID;
+				}
+			}
+		}
+	} else {
+		/*
+		 * If a replacement rule exists then modify entries
+		 * associated with this rule.
+		 */
+
+		struct rte_lpm_tbl_entry_v20 new_tbl24_entry = {
+			{.next_hop = lpm->rules_tbl[sub_rule_index].next_hop,},
+			.valid = VALID,
+			.valid_group = 0,
+			.depth = sub_rule_depth,
+		};
+
+		struct rte_lpm_tbl_entry_v20 new_tbl8_entry = {
+			.valid = VALID,
+			.valid_group = VALID,
+			.depth = sub_rule_depth,
+		};
+		new_tbl8_entry.next_hop =
+				lpm->rules_tbl[sub_rule_index].next_hop;
+
+		for (i = tbl24_index; i < (tbl24_index + tbl24_range); i++) {
+
+			if (lpm->tbl24[i].valid_group == 0 &&
+					lpm->tbl24[i].depth <= depth) {
+				lpm->tbl24[i] = new_tbl24_entry;
+			} else  if (lpm->tbl24[i].valid_group == 1) {
+				/*
+				 * If TBL24 entry is extended, then there has
+				 * to be a rule with depth >= 25 in the
+				 * associated TBL8 group.
+				 */
+
+				tbl8_group_index = lpm->tbl24[i].group_idx;
+				tbl8_index = tbl8_group_index *
+						RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+				for (j = tbl8_index; j < (tbl8_index +
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES); j++) {
+
+					if (lpm->tbl8[j].depth <= depth)
+						lpm->tbl8[j] = new_tbl8_entry;
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+
+static inline int32_t
+delete_depth_small_v1604(struct rte_lpm *lpm, uint32_t ip_masked,
+	uint8_t depth, int32_t sub_rule_index, uint8_t sub_rule_depth)
+{
+#define group_idx next_hop
+	uint32_t tbl24_range, tbl24_index, tbl8_group_index, tbl8_index, i, j;
+
+	/* Calculate the range and index into Table24. */
+	tbl24_range = depth_to_range(depth);
+	tbl24_index = (ip_masked >> 8);
+
+	/*
+	 * Firstly check the sub_rule_index. A -1 indicates no replacement rule
+	 * and a positive number indicates a sub_rule_index.
+	 */
+	if (sub_rule_index < 0) {
+		/*
+		 * If no replacement rule exists then invalidate entries
+		 * associated with this rule.
+		 */
+		for (i = tbl24_index; i < (tbl24_index + tbl24_range); i++) {
+
+			if (lpm->tbl24[i].valid_group == 0 &&
+					lpm->tbl24[i].depth <= depth) {
+				lpm->tbl24[i].valid = INVALID;
+			} else if (lpm->tbl24[i].valid_group == 1) {
+				/*
+				 * If TBL24 entry is extended, then there has
+				 * to be a rule with depth >= 25 in the
+				 * associated TBL8 group.
+				 */
+
+				tbl8_group_index = lpm->tbl24[i].group_idx;
+				tbl8_index = tbl8_group_index *
+						RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+				for (j = tbl8_index; j < (tbl8_index +
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES); j++) {
+
+					if (lpm->tbl8[j].depth <= depth)
+						lpm->tbl8[j].valid = INVALID;
+				}
+			}
+		}
+	} else {
+		/*
+		 * If a replacement rule exists then modify entries
+		 * associated with this rule.
+		 */
+
+		struct rte_lpm_tbl_entry new_tbl24_entry = {
+			.next_hop = lpm->rules_tbl[sub_rule_index].next_hop,
+			.valid = VALID,
+			.valid_group = 0,
+			.depth = sub_rule_depth,
+		};
+
+		struct rte_lpm_tbl_entry new_tbl8_entry = {
+			.valid = VALID,
+			.valid_group = VALID,
+			.depth = sub_rule_depth,
+			.next_hop = lpm->rules_tbl
+			[sub_rule_index].next_hop,
+		};
+
+		for (i = tbl24_index; i < (tbl24_index + tbl24_range); i++) {
+
+			if (lpm->tbl24[i].valid_group == 0 &&
+					lpm->tbl24[i].depth <= depth) {
+				lpm->tbl24[i] = new_tbl24_entry;
+			} else  if (lpm->tbl24[i].valid_group == 1) {
+				/*
+				 * If TBL24 entry is extended, then there has
+				 * to be a rule with depth >= 25 in the
+				 * associated TBL8 group.
+				 */
+
+				tbl8_group_index = lpm->tbl24[i].group_idx;
+				tbl8_index = tbl8_group_index *
+						RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+				for (j = tbl8_index; j < (tbl8_index +
+					RTE_LPM_TBL8_GROUP_NUM_ENTRIES); j++) {
+
+					if (lpm->tbl8[j].depth <= depth)
+						lpm->tbl8[j] = new_tbl8_entry;
+				}
+			}
+		}
+	}
+#undef group_idx
+	return 0;
+}
+
+/*
+ * Checks if table 8 group can be recycled.
+ *
+ * Return of -EEXIST means tbl8 is in use and thus can not be recycled.
+ * Return of -EINVAL means tbl8 is empty and thus can be recycled
+ * Return of value > -1 means tbl8 is in use but has all the same values and
+ * thus can be recycled
+ */
+static inline int32_t
+tbl8_recycle_check_v20(struct rte_lpm_tbl_entry_v20 *tbl8,
+		uint32_t tbl8_group_start)
+{
+	uint32_t tbl8_group_end, i;
+	tbl8_group_end = tbl8_group_start + RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+	/*
+	 * Check the first entry of the given tbl8. If it is invalid we know
+	 * this tbl8 does not contain any rule with a depth < RTE_LPM_MAX_DEPTH
+	 *  (As they would affect all entries in a tbl8) and thus this table
+	 *  can not be recycled.
+	 */
+	if (tbl8[tbl8_group_start].valid) {
+		/*
+		 * If first entry is valid check if the depth is less than 24
+		 * and if so check the rest of the entries to verify that they
+		 * are all of this depth.
+		 */
+		if (tbl8[tbl8_group_start].depth < MAX_DEPTH_TBL24) {
+			for (i = (tbl8_group_start + 1); i < tbl8_group_end;
+					i++) {
+
+				if (tbl8[i].depth !=
+						tbl8[tbl8_group_start].depth) {
+
+					return -EEXIST;
+				}
+			}
+			/* If all entries are the same return the tb8 index */
+			return tbl8_group_start;
+		}
+
+		return -EEXIST;
+	}
+	/*
+	 * If the first entry is invalid check if the rest of the entries in
+	 * the tbl8 are invalid.
+	 */
+	for (i = (tbl8_group_start + 1); i < tbl8_group_end; i++) {
+		if (tbl8[i].valid)
+			return -EEXIST;
+	}
+	/* If no valid entries are found then return -EINVAL. */
+	return -EINVAL;
+}
+
+static inline int32_t
+tbl8_recycle_check_v1604(struct rte_lpm_tbl_entry *tbl8,
+		uint32_t tbl8_group_start)
+{
+	uint32_t tbl8_group_end, i;
+	tbl8_group_end = tbl8_group_start + RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+	/*
+	 * Check the first entry of the given tbl8. If it is invalid we know
+	 * this tbl8 does not contain any rule with a depth < RTE_LPM_MAX_DEPTH
+	 *  (As they would affect all entries in a tbl8) and thus this table
+	 *  can not be recycled.
+	 */
+	if (tbl8[tbl8_group_start].valid) {
+		/*
+		 * If first entry is valid check if the depth is less than 24
+		 * and if so check the rest of the entries to verify that they
+		 * are all of this depth.
+		 */
+		if (tbl8[tbl8_group_start].depth < MAX_DEPTH_TBL24) {
+			for (i = (tbl8_group_start + 1); i < tbl8_group_end;
+					i++) {
+
+				if (tbl8[i].depth !=
+						tbl8[tbl8_group_start].depth) {
+
+					return -EEXIST;
+				}
+			}
+			/* If all entries are the same return the tb8 index */
+			return tbl8_group_start;
+		}
+
+		return -EEXIST;
+	}
+	/*
+	 * If the first entry is invalid check if the rest of the entries in
+	 * the tbl8 are invalid.
+	 */
+	for (i = (tbl8_group_start + 1); i < tbl8_group_end; i++) {
+		if (tbl8[i].valid)
+			return -EEXIST;
+	}
+	/* If no valid entries are found then return -EINVAL. */
+	return -EINVAL;
+}
+
+static inline int32_t
+delete_depth_big_v20(struct rte_lpm_v20 *lpm, uint32_t ip_masked,
+	uint8_t depth, int32_t sub_rule_index, uint8_t sub_rule_depth)
+{
+	uint32_t tbl24_index, tbl8_group_index, tbl8_group_start, tbl8_index,
+			tbl8_range, i;
+	int32_t tbl8_recycle_index;
+
+	/*
+	 * Calculate the index into tbl24 and range. Note: All depths larger
+	 * than MAX_DEPTH_TBL24 are associated with only one tbl24 entry.
+	 */
+	tbl24_index = ip_masked >> 8;
+
+	/* Calculate the index into tbl8 and range. */
+	tbl8_group_index = lpm->tbl24[tbl24_index].group_idx;
+	tbl8_group_start = tbl8_group_index * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+	tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
+	tbl8_range = depth_to_range(depth);
+
+	if (sub_rule_index < 0) {
+		/*
+		 * Loop through the range of entries on tbl8 for which the
+		 * rule_to_delete must be removed or modified.
+		 */
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+			if (lpm->tbl8[i].depth <= depth)
+				lpm->tbl8[i].valid = INVALID;
+		}
+	} else {
+		/* Set new tbl8 entry. */
+		struct rte_lpm_tbl_entry_v20 new_tbl8_entry = {
+			.valid = VALID,
+			.depth = sub_rule_depth,
+			.valid_group = lpm->tbl8[tbl8_group_start].valid_group,
+		};
+
+		new_tbl8_entry.next_hop =
+				lpm->rules_tbl[sub_rule_index].next_hop;
+		/*
+		 * Loop through the range of entries on tbl8 for which the
+		 * rule_to_delete must be modified.
+		 */
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+			if (lpm->tbl8[i].depth <= depth)
+				lpm->tbl8[i] = new_tbl8_entry;
+		}
+	}
+
+	/*
+	 * Check if there are any valid entries in this tbl8 group. If all
+	 * tbl8 entries are invalid we can free the tbl8 and invalidate the
+	 * associated tbl24 entry.
+	 */
+
+	tbl8_recycle_index = tbl8_recycle_check_v20(lpm->tbl8, tbl8_group_start);
+
+	if (tbl8_recycle_index == -EINVAL) {
+		/* Set tbl24 before freeing tbl8 to avoid race condition. */
+		lpm->tbl24[tbl24_index].valid = 0;
+		tbl8_free_v20(lpm->tbl8, tbl8_group_start);
+	} else if (tbl8_recycle_index > -1) {
+		/* Update tbl24 entry. */
+		struct rte_lpm_tbl_entry_v20 new_tbl24_entry = {
+			{ .next_hop = lpm->tbl8[tbl8_recycle_index].next_hop, },
+			.valid = VALID,
+			.valid_group = 0,
+			.depth = lpm->tbl8[tbl8_recycle_index].depth,
+		};
+
+		/* Set tbl24 before freeing tbl8 to avoid race condition. */
+		lpm->tbl24[tbl24_index] = new_tbl24_entry;
+		tbl8_free_v20(lpm->tbl8, tbl8_group_start);
+	}
+
+	return 0;
+}
+
+static inline int32_t
+delete_depth_big_v1604(struct rte_lpm *lpm, uint32_t ip_masked,
+	uint8_t depth, int32_t sub_rule_index, uint8_t sub_rule_depth)
+{
+#define group_idx next_hop
+	uint32_t tbl24_index, tbl8_group_index, tbl8_group_start, tbl8_index,
+			tbl8_range, i;
+	int32_t tbl8_recycle_index;
+
+	/*
+	 * Calculate the index into tbl24 and range. Note: All depths larger
+	 * than MAX_DEPTH_TBL24 are associated with only one tbl24 entry.
+	 */
+	tbl24_index = ip_masked >> 8;
+
+	/* Calculate the index into tbl8 and range. */
+	tbl8_group_index = lpm->tbl24[tbl24_index].group_idx;
+	tbl8_group_start = tbl8_group_index * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+	tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
+	tbl8_range = depth_to_range(depth);
+
+	if (sub_rule_index < 0) {
+		/*
+		 * Loop through the range of entries on tbl8 for which the
+		 * rule_to_delete must be removed or modified.
+		 */
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+			if (lpm->tbl8[i].depth <= depth)
+				lpm->tbl8[i].valid = INVALID;
+		}
+	} else {
+		/* Set new tbl8 entry. */
+		struct rte_lpm_tbl_entry new_tbl8_entry = {
+			.valid = VALID,
+			.depth = sub_rule_depth,
+			.valid_group = lpm->tbl8[tbl8_group_start].valid_group,
+			.next_hop = lpm->rules_tbl[sub_rule_index].next_hop,
+		};
+
+		/*
+		 * Loop through the range of entries on tbl8 for which the
+		 * rule_to_delete must be modified.
+		 */
+		for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
+			if (lpm->tbl8[i].depth <= depth)
+				lpm->tbl8[i] = new_tbl8_entry;
+		}
+	}
+
+	/*
+	 * Check if there are any valid entries in this tbl8 group. If all
+	 * tbl8 entries are invalid we can free the tbl8 and invalidate the
+	 * associated tbl24 entry.
+	 */
+
+	tbl8_recycle_index = tbl8_recycle_check_v1604(lpm->tbl8, tbl8_group_start);
+
+	if (tbl8_recycle_index == -EINVAL) {
+		/* Set tbl24 before freeing tbl8 to avoid race condition. */
+		lpm->tbl24[tbl24_index].valid = 0;
+		tbl8_free_v1604(lpm->tbl8, tbl8_group_start);
+	} else if (tbl8_recycle_index > -1) {
+		/* Update tbl24 entry. */
+		struct rte_lpm_tbl_entry new_tbl24_entry = {
+			.next_hop = lpm->tbl8[tbl8_recycle_index].next_hop,
+			.valid = VALID,
+			.valid_group = 0,
+			.depth = lpm->tbl8[tbl8_recycle_index].depth,
+		};
+
+		/* Set tbl24 before freeing tbl8 to avoid race condition. */
+		lpm->tbl24[tbl24_index] = new_tbl24_entry;
+		tbl8_free_v1604(lpm->tbl8, tbl8_group_start);
+	}
+#undef group_idx
+	return 0;
+}
+
+/*
+ * Deletes a rule
+ */
+int
+rte_lpm_delete_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth)
+{
+	int32_t rule_to_delete_index, sub_rule_index;
+	uint32_t ip_masked;
+	uint8_t sub_rule_depth;
+	/*
+	 * Check input arguments. Note: IP must be a positive integer of 32
+	 * bits in length therefore it need not be checked.
+	 */
+	if ((lpm == NULL) || (depth < 1) || (depth > RTE_LPM_MAX_DEPTH)) {
+		return -EINVAL;
+	}
+
+	ip_masked = ip & depth_to_mask(depth);
+
+	/*
+	 * Find the index of the input rule, that needs to be deleted, in the
+	 * rule table.
+	 */
+	rule_to_delete_index = rule_find_v20(lpm, ip_masked, depth);
+
+	/*
+	 * Check if rule_to_delete_index was found. If no rule was found the
+	 * function rule_find returns -EINVAL.
+	 */
+	if (rule_to_delete_index < 0)
+		return -EINVAL;
+
+	/* Delete the rule from the rule table. */
+	rule_delete_v20(lpm, rule_to_delete_index, depth);
+
+	/*
+	 * Find rule to replace the rule_to_delete. If there is no rule to
+	 * replace the rule_to_delete we return -1 and invalidate the table
+	 * entries associated with this rule.
+	 */
+	sub_rule_depth = 0;
+	sub_rule_index = find_previous_rule_v20(lpm, ip, depth, &sub_rule_depth);
+
+	/*
+	 * If the input depth value is less than 25 use function
+	 * delete_depth_small otherwise use delete_depth_big.
+	 */
+	if (depth <= MAX_DEPTH_TBL24) {
+		return delete_depth_small_v20(lpm, ip_masked, depth,
+				sub_rule_index, sub_rule_depth);
+	} else { /* If depth > MAX_DEPTH_TBL24 */
+		return delete_depth_big_v20(lpm, ip_masked, depth, sub_rule_index,
+				sub_rule_depth);
+	}
+}
+VERSION_SYMBOL(rte_lpm_delete, _v20, 2.0);
+
+int
+rte_lpm_delete_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth)
+{
+	int32_t rule_to_delete_index, sub_rule_index;
+	uint32_t ip_masked;
+	uint8_t sub_rule_depth;
+	/*
+	 * Check input arguments. Note: IP must be a positive integer of 32
+	 * bits in length therefore it need not be checked.
+	 */
+	if ((lpm == NULL) || (depth < 1) || (depth > RTE_LPM_MAX_DEPTH)) {
+		return -EINVAL;
+	}
+
+	ip_masked = ip & depth_to_mask(depth);
+
+	/*
+	 * Find the index of the input rule, that needs to be deleted, in the
+	 * rule table.
+	 */
+	rule_to_delete_index = rule_find_v1604(lpm, ip_masked, depth);
+
+	/*
+	 * Check if rule_to_delete_index was found. If no rule was found the
+	 * function rule_find returns -EINVAL.
+	 */
+	if (rule_to_delete_index < 0)
+		return -EINVAL;
+
+	/* Delete the rule from the rule table. */
+	rule_delete_v1604(lpm, rule_to_delete_index, depth);
+
+	/*
+	 * Find rule to replace the rule_to_delete. If there is no rule to
+	 * replace the rule_to_delete we return -1 and invalidate the table
+	 * entries associated with this rule.
+	 */
+	sub_rule_depth = 0;
+	sub_rule_index = find_previous_rule_v1604(lpm, ip, depth, &sub_rule_depth);
+
+	/*
+	 * If the input depth value is less than 25 use function
+	 * delete_depth_small otherwise use delete_depth_big.
+	 */
+	if (depth <= MAX_DEPTH_TBL24) {
+		return delete_depth_small_v1604(lpm, ip_masked, depth,
+				sub_rule_index, sub_rule_depth);
+	} else { /* If depth > MAX_DEPTH_TBL24 */
+		return delete_depth_big_v1604(lpm, ip_masked, depth, sub_rule_index,
+				sub_rule_depth);
+	}
+}
+BIND_DEFAULT_SYMBOL(rte_lpm_delete, _v1604, 16.04);
+MAP_STATIC_SYMBOL(int rte_lpm_delete(struct rte_lpm *lpm, uint32_t ip,
+		uint8_t depth), rte_lpm_delete_v1604);
+
+/*
+ * Delete all rules from the LPM table.
+ */
+void
+rte_lpm_delete_all_v20(struct rte_lpm_v20 *lpm)
+{
+	/* Zero rule information. */
+	memset(lpm->rule_info, 0, sizeof(lpm->rule_info));
+
+	/* Zero tbl24. */
+	memset(lpm->tbl24, 0, sizeof(lpm->tbl24));
+
+	/* Zero tbl8. */
+	memset(lpm->tbl8, 0, sizeof(lpm->tbl8));
+
+	/* Delete all rules form the rules table. */
+	memset(lpm->rules_tbl, 0, sizeof(lpm->rules_tbl[0]) * lpm->max_rules);
+}
+VERSION_SYMBOL(rte_lpm_delete_all, _v20, 2.0);
+
+void
+rte_lpm_delete_all_v1604(struct rte_lpm *lpm)
+{
+	/* Zero rule information. */
+	memset(lpm->rule_info, 0, sizeof(lpm->rule_info));
+
+	/* Zero tbl24. */
+	memset(lpm->tbl24, 0, sizeof(lpm->tbl24));
+
+	/* Zero tbl8. */
+	memset(lpm->tbl8, 0, sizeof(lpm->tbl8[0])
+			* RTE_LPM_TBL8_GROUP_NUM_ENTRIES * lpm->number_tbl8s);
+
+	/* Delete all rules form the rules table. */
+	memset(lpm->rules_tbl, 0, sizeof(lpm->rules_tbl[0]) * lpm->max_rules);
+}
+BIND_DEFAULT_SYMBOL(rte_lpm_delete_all, _v1604, 16.04);
+MAP_STATIC_SYMBOL(void rte_lpm_delete_all(struct rte_lpm *lpm),
+		rte_lpm_delete_all_v1604);