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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2016-2017 Intel Corporation
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <getopt.h>
#include <stdarg.h>
#include <errno.h>
#include <rte_memory.h>
#include <rte_string_fns.h>
#include "common.h"
#include "args.h"
#include "init.h"
/* 1M flows by default */
#define DEFAULT_NUM_FLOWS 0x100000
/* global var for number of nodes - extern in header */
uint8_t num_nodes;
/* global var for number of flows - extern in header */
uint32_t num_flows = DEFAULT_NUM_FLOWS;
static const char *progname;
/**
* Prints out usage information to stdout
*/
static void
usage(void)
{
printf("%s [EAL options] -- -p PORTMASK -n NUM_NODES -f NUM_FLOWS\n"
" -p PORTMASK: hexadecimal bitmask of ports to use\n"
" -n NUM_NODES: number of node processes to use\n"
" -f NUM_FLOWS: number of flows to be added in the EFD table\n",
progname);
}
/**
* The ports to be used by the application are passed in
* the form of a bitmask. This function parses the bitmask
* and places the port numbers to be used into the port[]
* array variable
*/
static int
parse_portmask(uint8_t max_ports, const char *portmask)
{
char *end = NULL;
unsigned long pm;
uint8_t count = 0;
if (portmask == NULL || *portmask == '\0')
return -1;
/* convert parameter to a number and verify */
pm = strtoul(portmask, &end, 16);
if (end == NULL || *end != '\0' || pm == 0)
return -1;
/* loop through bits of the mask and mark ports */
while (pm != 0) {
if (pm & 0x01) { /* bit is set in mask, use port */
if (count >= max_ports)
printf("WARNING: requested port %u not present"
" - ignoring\n", (unsigned int)count);
else
info->id[info->num_ports++] = count;
}
pm = (pm >> 1);
count++;
}
return 0;
}
/**
* Take the number of nodes parameter passed to the app
* and convert to a number to store in the num_nodes variable
*/
static int
parse_num_nodes(const char *nodes)
{
char *end = NULL;
unsigned long temp;
if (nodes == NULL || *nodes == '\0')
return -1;
temp = strtoul(nodes, &end, 10);
if (end == NULL || *end != '\0' || temp == 0)
return -1;
num_nodes = (uint8_t)temp;
return 0;
}
static int
parse_num_flows(const char *flows)
{
char *end = NULL;
/* parse hexadecimal string */
num_flows = strtoul(flows, &end, 16);
if ((flows[0] == '\0') || (end == NULL) || (*end != '\0'))
return -1;
if (num_flows == 0)
return -1;
return 0;
}
/**
* The application specific arguments follow the DPDK-specific
* arguments which are stripped by the DPDK init. This function
* processes these application arguments, printing usage info
* on error.
*/
int
parse_app_args(uint8_t max_ports, int argc, char *argv[])
{
int option_index, opt;
char **argvopt = argv;
static struct option lgopts[] = { /* no long options */
{NULL, 0, 0, 0 }
};
progname = argv[0];
while ((opt = getopt_long(argc, argvopt, "n:f:p:", lgopts,
&option_index)) != EOF) {
switch (opt) {
case 'p':
if (parse_portmask(max_ports, optarg) != 0) {
usage();
return -1;
}
break;
case 'n':
if (parse_num_nodes(optarg) != 0) {
usage();
return -1;
}
break;
case 'f':
if (parse_num_flows(optarg) != 0) {
usage();
return -1;
}
break;
default:
printf("ERROR: Unknown option '%c'\n", opt);
usage();
return -1;
}
}
if (info->num_ports == 0 || num_nodes == 0) {
usage();
return -1;
}
if (info->num_ports % 2 != 0) {
printf("ERROR: application requires an even "
"number of ports to use\n");
return -1;
}
return 0;
}
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