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Diffstat (limited to 'examples/server_node_efd/server/args.c')
| -rw-r--r-- | examples/server_node_efd/server/args.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/examples/server_node_efd/server/args.c b/examples/server_node_efd/server/args.c new file mode 100644 index 00000000..ee292038 --- /dev/null +++ b/examples/server_node_efd/server/args.c @@ -0,0 +1,200 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2016-2017 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#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; +} |