1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2016-2017 Intel Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <stdint.h> 37 #include <getopt.h> 38 #include <stdarg.h> 39 #include <errno.h> 40 41 #include <rte_memory.h> 42 #include <rte_string_fns.h> 43 44 #include "common.h" 45 #include "args.h" 46 #include "init.h" 47 48 /* 1M flows by default */ 49 #define DEFAULT_NUM_FLOWS 0x100000 50 51 /* global var for number of nodes - extern in header */ 52 uint8_t num_nodes; 53 /* global var for number of flows - extern in header */ 54 uint32_t num_flows = DEFAULT_NUM_FLOWS; 55 56 static const char *progname; 57 58 /** 59 * Prints out usage information to stdout 60 */ 61 static void 62 usage(void) 63 { 64 printf("%s [EAL options] -- -p PORTMASK -n NUM_NODES -f NUM_FLOWS\n" 65 " -p PORTMASK: hexadecimal bitmask of ports to use\n" 66 " -n NUM_NODES: number of node processes to use\n" 67 " -f NUM_FLOWS: number of flows to be added in the EFD table\n", 68 progname); 69 } 70 71 /** 72 * The ports to be used by the application are passed in 73 * the form of a bitmask. This function parses the bitmask 74 * and places the port numbers to be used into the port[] 75 * array variable 76 */ 77 static int 78 parse_portmask(uint8_t max_ports, const char *portmask) 79 { 80 char *end = NULL; 81 unsigned long pm; 82 uint8_t count = 0; 83 84 if (portmask == NULL || *portmask == '\0') 85 return -1; 86 87 /* convert parameter to a number and verify */ 88 pm = strtoul(portmask, &end, 16); 89 if (end == NULL || *end != '\0' || pm == 0) 90 return -1; 91 92 /* loop through bits of the mask and mark ports */ 93 while (pm != 0) { 94 if (pm & 0x01) { /* bit is set in mask, use port */ 95 if (count >= max_ports) 96 printf("WARNING: requested port %u not present" 97 " - ignoring\n", (unsigned int)count); 98 else 99 info->id[info->num_ports++] = count; 100 } 101 pm = (pm >> 1); 102 count++; 103 } 104 105 return 0; 106 } 107 108 /** 109 * Take the number of nodes parameter passed to the app 110 * and convert to a number to store in the num_nodes variable 111 */ 112 static int 113 parse_num_nodes(const char *nodes) 114 { 115 char *end = NULL; 116 unsigned long temp; 117 118 if (nodes == NULL || *nodes == '\0') 119 return -1; 120 121 temp = strtoul(nodes, &end, 10); 122 if (end == NULL || *end != '\0' || temp == 0) 123 return -1; 124 125 num_nodes = (uint8_t)temp; 126 return 0; 127 } 128 129 static int 130 parse_num_flows(const char *flows) 131 { 132 char *end = NULL; 133 134 /* parse hexadecimal string */ 135 num_flows = strtoul(flows, &end, 16); 136 if ((flows[0] == '\0') || (end == NULL) || (*end != '\0')) 137 return -1; 138 139 if (num_flows == 0) 140 return -1; 141 142 return 0; 143 } 144 145 /** 146 * The application specific arguments follow the DPDK-specific 147 * arguments which are stripped by the DPDK init. This function 148 * processes these application arguments, printing usage info 149 * on error. 150 */ 151 int 152 parse_app_args(uint8_t max_ports, int argc, char *argv[]) 153 { 154 int option_index, opt; 155 char **argvopt = argv; 156 static struct option lgopts[] = { /* no long options */ 157 {NULL, 0, 0, 0 } 158 }; 159 progname = argv[0]; 160 161 while ((opt = getopt_long(argc, argvopt, "n:f:p:", lgopts, 162 &option_index)) != EOF) { 163 switch (opt) { 164 case 'p': 165 if (parse_portmask(max_ports, optarg) != 0) { 166 usage(); 167 return -1; 168 } 169 break; 170 case 'n': 171 if (parse_num_nodes(optarg) != 0) { 172 usage(); 173 return -1; 174 } 175 break; 176 case 'f': 177 if (parse_num_flows(optarg) != 0) { 178 usage(); 179 return -1; 180 } 181 break; 182 default: 183 printf("ERROR: Unknown option '%c'\n", opt); 184 usage(); 185 return -1; 186 } 187 } 188 189 if (info->num_ports == 0 || num_nodes == 0) { 190 usage(); 191 return -1; 192 } 193 194 if (info->num_ports % 2 != 0) { 195 printf("ERROR: application requires an even " 196 "number of ports to use\n"); 197 return -1; 198 } 199 return 0; 200 } 201