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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);
/** Shutdown cleanup of shared host memory keepalive object.
* @param *shm
* Pointer to SHM keepalive structure. May be NULL.
*
* If *shm is NULL, this function will only attempt to remove the
* shared host memory handle and not unmap the underlying memory.
*/
void rte_keepalive_shm_cleanup(struct rte_keepalive_shm *ka_shm);
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