Function dma_parse_args

dpdk/examples/dma/dmafwd.c:632–767

Parse the argument given in the command line of the application */

/* Parse the argument given in the command line of the application */
static int
dma_parse_args(int argc, char **argv, unsigned int nb_ports)
{
	static const char short_options[] =
		"b:"  /* dma batch size */
		"c:"  /* copy type (sw|hw) */
		"f:"  /* max frame size */
		"m:"  /* force min copy size */
		"p:"  /* portmask */
		"q:"  /* number of RX queues per port */
		"s:"  /* ring size */
		"i:"  /* interval, in seconds, between stats prints */
		;

	static const struct option lgopts[] = {
		{CMD_LINE_OPT_MAC_UPDATING, no_argument, &mac_updating, 1},
		{CMD_LINE_OPT_NO_MAC_UPDATING, no_argument, &mac_updating, 0},
		{CMD_LINE_OPT_PORTMASK, required_argument, NULL, 'p'},
		{CMD_LINE_OPT_NB_QUEUE, required_argument, NULL, 'q'},
		{CMD_LINE_OPT_COPY_TYPE, required_argument, NULL, 'c'},
		{CMD_LINE_OPT_RING_SIZE, required_argument, NULL, 's'},
		{CMD_LINE_OPT_BATCH_SIZE, required_argument, NULL, 'b'},
		{CMD_LINE_OPT_FRAME_SIZE, required_argument, NULL, 'f'},
		{CMD_LINE_OPT_FORCE_COPY_SIZE, required_argument, NULL, 'm'},
		{CMD_LINE_OPT_STATS_INTERVAL, required_argument, NULL, 'i'},
		{NULL, 0, 0, 0}
	};

	const unsigned int default_port_mask = (1 << nb_ports) - 1;
	int opt, ret;
	char **argvopt;
	int option_index;
	char *prgname = argv[0];

	dma_enabled_port_mask = default_port_mask;
	argvopt = argv;

	while ((opt = getopt_long(argc, argvopt, short_options,
			lgopts, &option_index)) != EOF) {

		switch (opt) {
		case 'b':
			dma_batch_sz = atoi(optarg);
			if (dma_batch_sz > MAX_PKT_BURST) {
				printf("Invalid dma batch size, %s.\n", optarg);
				dma_usage(prgname);
				return -1;
			}
			break;
		case 'f':
			max_frame_size = atoi(optarg);
			if (max_frame_size > RTE_ETHER_MAX_JUMBO_FRAME_LEN) {
				printf("Invalid max frame size, %s.\n", optarg);
				dma_usage(prgname);
				return -1;
			}
			break;