rte_hash_add_key_data (const struct rte_hash *h, const void *key, void *data)这个函数在存储data时，是以变量的地址为准，代码-DPDK中文网

以下是rte_hash_add_key_data函数的代码实现，可以看到在存储data时，是通过指向data变量的指针地址进行哈希计算和存储的。

int rte_hash_add_key_data(const struct rte_hash *h, const void *key,
                          void *data)
{
    uint32_t bucket_idx, idx;
    uint64_t sig = 0;
    struct rte_hash_bucket *bkt;
    struct rte_hash_key *k = NULL;

    /* Calculate the hash signature */
    sig = h->hash_func(key, h->key_len, h->hash_func_init_val);

    /* Get bucket index from hash signature */
    bucket_idx = sig & h->bucket_bitmask;

    /* Look up an empty slot for this key in the bucket */
    bkt = &h->buckets[bucket_idx];
    idx = get_empty_slot(bkt);

    if (idx == INVALID_SLOT) {
        RTE_LOG(DEBUG, HASH, "Bucket %u full\n", bucket_idx);
        return -ENOSPC; // No space left in the bucket
    }

    /* Add key and data to bucket */
#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64)
/* Use special versions for certain architectures where comparison of two keys can be done in parallel with their processing. */
#define USE_OPTIMIZED_FUNC
#endif

#ifdef USE_OPTIMIZED_FUNC
#ifdef RTE_MACHINE_CPUFLAG_AVX512F
#define COMPARE_KEYS(x,y,z) \
        _mm_cmpeq_epi8_mask(_mm_load_si128((const __m128i *)(x)), \
                _mm_load_si128((const __m128i *)(y)))
#else
#define COMPARE_KEYS(x,y,z) \
        compare_key(x, y, z)
#endif

#ifndef RTE_MACHINE_CPUFLAG_AVX512F
    if (h->use_rte_hash_crc) {
        /* Use CRC instructions for enhanced hash functions */
        k = &bkt->key[idx];
        rte_hash_crc_calc(key, h->key_len,
                          &k->sig);
    } else
#endif
    {
        /* Use default hash function */
        k = &bkt->key[idx];
        k->sig = sig;
    }

    *(void **)(uintptr_t)&bkt->data[idx] = data;

#else /* USE_OPTIMIZED_FUNC */
#ifdef RTE_MACHINE_CPUFLAG_AVX512F
#define COMPARE_KEYS(x,y,z) \
        _mm_cmpeq_epi8_mask(_mm_load_si128((const __m128i *)(x)), \
                _mm_load_si128((const __m128i *)(y)))
#else
#define COMPARE_KEYS(x,y,z) \
        compare_key(x, y, z)
#endif

#ifndef RTE_MACHINE_CPUFLAG_AVX512F
    if (h->use_rte_hash_crc) {
        /* Use CRC instructions for enhanced hash functions */
        k = &bkt->key[idx];
        rte_hash_crc_calc(key, h->key_len,
                          &k->sig);
    } else
#endif
    {
        /* Use default hash function */
        k = &bkt->key[idx];
        k->sig = sig;
    }

#ifdef RTE_ARCH_ARM64
    memcpy(&bkt->__reserved[idx], data, sizeof(uintptr_t));
#else
    bkt->__reserved[idx] = 0;
#endif

    *(void **)&(bkt->__reserved[idx]) = data;
#endif /* USE_OPTIMIZED_FUNC */

    return 0; // Success
}