multi_process/simple_mp/mp_commands.c

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 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 <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <inttypes.h>
#include <stdio.h>
#include <termios.h>
#include <errno.h>
#include <sys/queue.h>

#include <rte_common.h>
#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_eal.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_launch.h>
#include <rte_log.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_ring.h>
#include <rte_debug.h>
#include <rte_mempool.h>
#include <rte_string_fns.h>

#include <cmdline_rdline.h>
#include <cmdline_parse.h>
#include <cmdline_parse_string.h>
#include <cmdline_socket.h>
#include <cmdline.h>
#include "mp_commands.h"

/**********************************************************/

struct cmd_send_result {
        cmdline_fixed_string_t action;
        cmdline_fixed_string_t message;
};

static void cmd_send_parsed(void *parsed_result,
                __attribute__((unused)) struct cmdline *cl,
                __attribute__((unused)) void *data)
{
        void *msg = NULL;
        struct cmd_send_result *res = parsed_result;

        if (rte_mempool_get(message_pool, &msg) < 0)
                rte_panic("Failed to get message buffer\n");
        snprintf((char *)msg, string_size, "%s", res->message);
        if (rte_ring_enqueue(send_ring, msg) < 0) {
                printf("Failed to send message - message discarded\n");
                rte_mempool_put(message_pool, msg);
        }
}

cmdline_parse_token_string_t cmd_send_action =
        TOKEN_STRING_INITIALIZER(struct cmd_send_result, action, "send");
cmdline_parse_token_string_t cmd_send_message =
        TOKEN_STRING_INITIALIZER(struct cmd_send_result, message, NULL);

cmdline_parse_inst_t cmd_send = {
        .f = cmd_send_parsed,  /* function to call */
        .data = NULL,      /* 2nd arg of func */
        .help_str = "send a string to another process",
        .tokens = {        /* token list, NULL terminated */
                        (void *)&cmd_send_action,
                        (void *)&cmd_send_message,
                        NULL,
        },
};

/**********************************************************/

struct cmd_quit_result {
        cmdline_fixed_string_t quit;
};

static void cmd_quit_parsed(__attribute__((unused)) void *parsed_result,
                            struct cmdline *cl,
                            __attribute__((unused)) void *data)
{
        quit = 1;
        cmdline_quit(cl);
}

cmdline_parse_token_string_t cmd_quit_quit =
        TOKEN_STRING_INITIALIZER(struct cmd_quit_result, quit, "quit");

cmdline_parse_inst_t cmd_quit = {
        .f = cmd_quit_parsed,  /* function to call */
        .data = NULL,      /* 2nd arg of func */
        .help_str = "close the application",
        .tokens = {        /* token list, NULL terminated */
                (void *)&cmd_quit_quit,
                NULL,
        },
};

/**********************************************************/

struct cmd_help_result {
        cmdline_fixed_string_t help;
};

static void cmd_help_parsed(__attribute__((unused)) void *parsed_result,
                            struct cmdline *cl,
                            __attribute__((unused)) void *data)
{
        cmdline_printf(cl, "Simple demo example of multi-process in RTE\n\n"
                        "This is a readline-like interface that can be used to\n"
                        "send commands to the simple app. Commands supported are:\n\n"
                        "- send [string]\n" "- help\n" "- quit\n\n");
}

cmdline_parse_token_string_t cmd_help_help =
        TOKEN_STRING_INITIALIZER(struct cmd_help_result, help, "help");

cmdline_parse_inst_t cmd_help = {
        .f = cmd_help_parsed,  /* function to call */
        .data = NULL,      /* 2nd arg of func */
        .help_str = "show help",
        .tokens = {        /* token list, NULL terminated */
                (void *)&cmd_help_help,
                NULL,
        },
};

/****** CONTEXT (list of instruction) */
cmdline_parse_ctx_t simple_mp_ctx[] = {
                (cmdline_parse_inst_t *)&cmd_send,
                (cmdline_parse_inst_t *)&cmd_quit,
                (cmdline_parse_inst_t *)&cmd_help,
        NULL,
};