3998e2a072
Replace the BSD license header with the SPDX tag for files with only an Intel copyright on them. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2016 Intel Corporation
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*/
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#define RTE_KEEPALIVE_SHM_NAME "/dpdk_keepalive_shm_name"
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#define RTE_KEEPALIVE_SHM_ALIVE 1
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#define RTE_KEEPALIVE_SHM_DEAD 2
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <semaphore.h>
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#include <rte_keepalive.h>
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/**
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* Keepalive SHM structure.
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*
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* The shared memory allocated by the primary is this size, and contains the
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* information as contained within this struct. A secondary may open the SHM,
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* and read the contents.
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*/
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struct rte_keepalive_shm {
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/** IPC semaphore. Posted when a core dies */
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sem_t core_died;
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/**
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* Relayed status of each core.
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*/
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enum rte_keepalive_state core_state[RTE_KEEPALIVE_MAXCORES];
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/**
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* Last-seen-alive timestamps for the cores
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*/
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uint64_t core_last_seen_times[RTE_KEEPALIVE_MAXCORES];
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};
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/**
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* Create shared host memory keepalive object.
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* @return
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* Pointer to SHM keepalive structure, or NULL on failure.
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*/
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struct rte_keepalive_shm *rte_keepalive_shm_create(void);
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/**
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* Relays state for given core
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* @param *shm
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* Pointer to SHM keepalive structure.
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* @param id_core
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* Id of core
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* @param core_state
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* State of core
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* @param last_alive
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* Last seen timestamp for core
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*/
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void rte_keepalive_relayed_state(struct rte_keepalive_shm *shm,
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const int id_core, const enum rte_keepalive_state core_state,
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uint64_t last_alive);
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/** Shutdown cleanup of shared host memory keepalive object.
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* @param *shm
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* Pointer to SHM keepalive structure. May be NULL.
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*
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* If *shm is NULL, this function will only attempt to remove the
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* shared host memory handle and not unmap the underlying memory.
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*/
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void rte_keepalive_shm_cleanup(struct rte_keepalive_shm *ka_shm);
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