Function rte_flow_conv_item_spec

dpdk/lib/ethdev/rte_flow.c:604–694

* Copy pattern item specification. * * @param[out] buf * Output buffer. Can be NULL if @p size is zero. * @param size * Size of @p buf in bytes. * @param[in] item * Pattern item to copy specification from. * @param type * Specification selector for either @p spec, @p last or @p mask. * * @return * Number of bytes needed to store pattern item specification regardless * of @

 *   enough.
 */
static size_t
rte_flow_conv_item_spec(void *buf, const size_t size,
			const struct rte_flow_item *item,
			enum rte_flow_conv_item_spec_type type)
{
	size_t off;
	const void *data =
		type == RTE_FLOW_CONV_ITEM_SPEC ? item->spec :
		type == RTE_FLOW_CONV_ITEM_LAST ? item->last :
		type == RTE_FLOW_CONV_ITEM_MASK ? item->mask :
		NULL;

	switch (item->type) {
		union {
			const struct rte_flow_item_raw *raw;
			const struct rte_flow_item_geneve_opt *geneve_opt;
		} spec;
		union {
			const struct rte_flow_item_raw *raw;
		} last;
		union {
			const struct rte_flow_item_raw *raw;
		} mask;
		union {
			const struct rte_flow_item_raw *raw;
			const struct rte_flow_item_geneve_opt *geneve_opt;
		} src;
		union {
			struct rte_flow_item_raw *raw;
			struct rte_flow_item_geneve_opt *geneve_opt;
		} dst;
		void *deep_src;
		size_t tmp;

	case RTE_FLOW_ITEM_TYPE_RAW:
		spec.raw = item->spec;
		last.raw = item->last ? item->last : item->spec;
		mask.raw = item->mask ? item->mask : &rte_flow_item_raw_mask;
		src.raw = data;
		dst.raw = buf;
		rte_memcpy(dst.raw,
			   (&(struct rte_flow_item_raw){
				.relative = src.raw->relative,
				.search = src.raw->search,
				.reserved = src.raw->reserved,
				.offset = src.raw->offset,
				.limit = src.raw->limit,
				.length = src.raw->length,
			   }),
			   size > sizeof(*dst.raw) ? sizeof(*dst.raw) : size);
		off = sizeof(*dst.raw);
		if (type == RTE_FLOW_CONV_ITEM_SPEC ||
		    (type == RTE_FLOW_CONV_ITEM_MASK &&
		     ((spec.raw->length & mask.raw->length) >=
		      (last.raw->length & mask.raw->length))))
			tmp = spec.raw->length & mask.raw->length;
		else
			tmp = last.raw->length & mask.raw->length;