Function rte_acl_create

dpdk/lib/acl/rte_acl.c:361–428

}

struct rte_acl_ctx *
rte_acl_create(const struct rte_acl_param *param)
{
	size_t sz;
	struct rte_acl_ctx *ctx;
	struct rte_acl_list *acl_list;
	struct rte_tailq_entry *te;
	char name[sizeof(ctx->name)];

	acl_list = RTE_TAILQ_CAST(rte_acl_tailq.head, rte_acl_list);

	/* check that input parameters are valid. */
	if (param == NULL || param->name == NULL) {
		rte_errno = EINVAL;
		return NULL;
	}

	snprintf(name, sizeof(name), "ACL_%s", param->name);

	/* calculate amount of memory required for pattern set. */
	sz = sizeof(*ctx) + param->max_rule_num * param->rule_size;

	/* get EAL TAILQ lock. */
	rte_mcfg_tailq_write_lock();

	/* if we already have one with that name */
	TAILQ_FOREACH(te, acl_list, next) {
		ctx = (struct rte_acl_ctx *) te->data;
		if (strncmp(param->name, ctx->name, sizeof(ctx->name)) == 0)
			break;
	}

	/* if ACL with such name doesn't exist, then create a new one. */
	if (te == NULL) {
		ctx = NULL;
		te = rte_zmalloc("ACL_TAILQ_ENTRY", sizeof(*te), 0);

		if (te == NULL) {
			RTE_LOG(ERR, ACL, "Cannot allocate tailq entry!\n");
			goto exit;
		}

		ctx = rte_zmalloc_socket(name, sz, RTE_CACHE_LINE_SIZE, param->socket_id);

		if (ctx == NULL) {
			RTE_LOG(ERR, ACL,
				"allocation of %zu bytes on socket %d for %s failed\n",
				sz, param->socket_id, name);
			rte_free(te);
			goto exit;
		}
		/* init new allocated context. */
		ctx->rules = ctx + 1;
		ctx->max_rules = param->max_rule_num;
		ctx->rule_sz = param->rule_size;
		ctx->socket_id = param->socket_id;
		ctx->alg = acl_get_best_alg();
		strlcpy(ctx->name, param->name, sizeof(ctx->name));