Function rte_thash_init_ctx

dpdk/lib/hash/rte_thash.c:234–322

}

struct rte_thash_ctx *
rte_thash_init_ctx(const char *name, uint32_t key_len, uint32_t reta_sz,
	uint8_t *key, uint32_t flags)
{
	struct rte_thash_ctx *ctx;
	struct rte_tailq_entry *te;
	struct rte_thash_list *thash_list;
	uint32_t i;

	if ((name == NULL) || (key_len == 0) || !RETA_SZ_IN_RANGE(reta_sz)) {
		rte_errno = EINVAL;
		return NULL;
	}

	thash_list = RTE_TAILQ_CAST(rte_thash_tailq.head, rte_thash_list);

	rte_mcfg_tailq_write_lock();

	/* guarantee there's no existing */
	TAILQ_FOREACH(te, thash_list, next) {
		ctx = (struct rte_thash_ctx *)te->data;
		if (strncmp(name, ctx->name, sizeof(ctx->name)) == 0)
			break;
	}
	ctx = NULL;
	if (te != NULL) {
		rte_errno = EEXIST;
		goto exit;
	}

	/* allocate tailq entry */
	te = rte_zmalloc("THASH_TAILQ_ENTRY", sizeof(*te), 0);
	if (te == NULL) {
		RTE_LOG(ERR, HASH,
			"Can not allocate tailq entry for thash context %s\n",
			name);
		rte_errno = ENOMEM;
		goto exit;
	}

	ctx = rte_zmalloc(NULL, sizeof(struct rte_thash_ctx) + key_len, 0);
	if (ctx == NULL) {
		RTE_LOG(ERR, HASH, "thash ctx %s memory allocation failed\n",
			name);
		rte_errno = ENOMEM;
		goto free_te;
	}

	rte_strlcpy(ctx->name, name, sizeof(ctx->name));
	ctx->key_len = key_len;
	ctx->reta_sz_log = reta_sz;
	LIST_INIT(&ctx->head);
	ctx->flags = flags;

	if (key)
		rte_memcpy(ctx->hash_key, key, key_len);
	else {
		for (i = 0; i < key_len; i++)