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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2016 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.
+ */
+
+#define RTE_KEEPALIVE_SHM_NAME "/dpdk_keepalive_shm_name"
+
+#define RTE_KEEPALIVE_SHM_ALIVE 1
+#define RTE_KEEPALIVE_SHM_DEAD 2
+
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <semaphore.h>
+#include <rte_keepalive.h>
+
+/**
+ * Keepalive SHM structure.
+ *
+ * The shared memory allocated by the primary is this size, and contains the
+ * information as contained within this struct. A secondary may open the SHM,
+ * and read the contents.
+ */
+struct rte_keepalive_shm {
+ /** IPC semaphore. Posted when a core dies */
+ sem_t core_died;
+
+ /**
+ * Relayed status of each core.
+ */
+ enum rte_keepalive_state core_state[RTE_KEEPALIVE_MAXCORES];
+
+ /**
+ * Last-seen-alive timestamps for the cores
+ */
+ uint64_t core_last_seen_times[RTE_KEEPALIVE_MAXCORES];
+};
+
+/**
+ * Create shared host memory keepalive object.
+ * @return
+ * Pointer to SHM keepalive structure, or NULL on failure.
+ */
+struct rte_keepalive_shm *rte_keepalive_shm_create(void);
+
+/**
+ * Relays state for given core
+ * @param *shm
+ * Pointer to SHM keepalive structure.
+ * @param id_core
+ * Id of core
+ * @param core_state
+ * State of core
+ * @param last_alive
+ * Last seen timestamp for core
+ */
+void rte_keepalive_relayed_state(struct rte_keepalive_shm *shm,
+ const int id_core, const enum rte_keepalive_state core_state,
+ uint64_t last_alive);