eventdev: relax SMP barriers with C11 atomics

[dpdk.git] / lib / librte_lpm / rte_lpm6.h

diff --git a/lib/librte_lpm/rte_lpm6.h b/lib/librte_lpm/rte_lpm6.h
index ef2c81e..f96f337 100644 (file)
--- a/lib/librte_lpm/rte_lpm6.h
+++ b/lib/librte_lpm/rte_lpm6.h
@@ -1,35 +1,5 @@
-/*-
- *   BSD LICENSE
- * 
- *   Copyright(c) 2010-2013 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.
- * 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
  */
 #ifndef _RTE_LPM6_H_
 #define _RTE_LPM6_H_
@@ -39,6 +9,9 @@
  * RTE Longest Prefix Match for IPv6 (LPM6)
  */
 
+#include <stdint.h>
+#include <rte_compat.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -73,7 +46,6 @@ struct rte_lpm6_config {
  *   to an appropriate values. Possible rte_errno values include:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
  *    - E_RTE_SECONDARY - function was called from a secondary process instance
- *    - E_RTE_NO_TAILQ - no tailq list could be got for the lpm object list
  *    - EINVAL - invalid parameter passed to function
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists
@@ -122,8 +94,27 @@ rte_lpm6_free(struct rte_lpm6 *lpm);
  *   0 on success, negative value otherwise
  */
 int
-rte_lpm6_add(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
-               uint8_t next_hop);
+rte_lpm6_add(struct rte_lpm6 *lpm, const uint8_t *ip, uint8_t depth,
+            uint32_t next_hop);
+
+/**
+ * Check if a rule is present in the LPM table,
+ * and provide its next hop if it is.
+ *
+ * @param lpm
+ *   LPM object handle
+ * @param ip
+ *   IP of the rule to be searched
+ * @param depth
+ *   Depth of the rule to searched
+ * @param next_hop
+ *   Next hop of the rule (valid only if it is found)
+ * @return
+ *   1 if the rule exists, 0 if it does not, a negative value on failure
+ */
+int
+rte_lpm6_is_rule_present(struct rte_lpm6 *lpm, const uint8_t *ip, uint8_t depth,
+                        uint32_t *next_hop);
 
 /**
  * Delete a rule from the LPM table.
@@ -138,7 +129,7 @@ rte_lpm6_add(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
  *   0 on success, negative value otherwise
  */
 int
-rte_lpm6_delete(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth);
+rte_lpm6_delete(struct rte_lpm6 *lpm, const uint8_t *ip, uint8_t depth);
 
 /**
  * Delete a rule from the LPM table.
@@ -180,7 +171,7 @@ rte_lpm6_delete_all(struct rte_lpm6 *lpm);
  *   -EINVAL for incorrect arguments, -ENOENT on lookup miss, 0 on lookup hit
  */
 int
-rte_lpm6_lookup(const struct rte_lpm6 *lpm, uint8_t *ip, uint8_t *next_hop);
+rte_lpm6_lookup(const struct rte_lpm6 *lpm, const uint8_t *ip, uint32_t *next_hop);
 
 /**
  * Lookup multiple IP addresses in an LPM table.
@@ -201,7 +192,7 @@ rte_lpm6_lookup(const struct rte_lpm6 *lpm, uint8_t *ip, uint8_t *next_hop);
 int
 rte_lpm6_lookup_bulk_func(const struct rte_lpm6 *lpm,
                uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE],
-               int16_t * next_hops, unsigned n);
+               int32_t *next_hops, unsigned int n);
 
 #ifdef __cplusplus
 }