flow_multi_fwd_sample.c

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/*
 * Copyright (c) 2022 NVIDIA CORPORATION AND AFFILIATES.  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.
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 *       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
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 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 */
 
#include <string.h>
#include <unistd.h>
 
#include <doca_log.h>
#include <doca_flow.h>
 
#include "flow_common.h"
 
DOCA_LOG_REGISTER(FLOW_MULTI_FWD);
 
/*
 * Create DOCA Flow control pipe
 *
 * @port [in]: port of the pipe
 * @pipe [out]: created pipe pointer
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise
 */
doca_error_t create_multi_fwd_pipe(struct doca_flow_port *port, struct doca_flow_pipe **pipe)
{
    struct doca_flow_match match;
    struct doca_flow_actions actions, *actions_arr[NB_ACTIONS_ARR];
    struct doca_flow_pipe_cfg *pipe_cfg;
    struct doca_flow_fwd fwd = {.type = DOCA_FLOW_FWD_CHANGEABLE};
    doca_error_t result;
 
    memset(&match, 0, sizeof(match));
    memset(&actions, 0, sizeof(actions));
 
    /* match on outer source IP address */
    match.parser_meta.outer_l3_type = DOCA_FLOW_L3_META_IPV4;
    match.outer.l3_type = DOCA_FLOW_L3_TYPE_IP4;
    match.outer.ip4.src_ip = 0xffffffff;
 
    actions_arr[0] = &actions;
 
    result = doca_flow_pipe_cfg_create(&pipe_cfg, port);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = set_flow_pipe_cfg(pipe_cfg, "HAIRPIN_PIPE", DOCA_FLOW_PIPE_BASIC, true);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_match(pipe_cfg, &match, NULL);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg match: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_actions(pipe_cfg, actions_arr, NULL, NULL, NB_ACTIONS_ARR);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg actions: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
 
    /* set fwd type = DOCA_FLOW_FWD_CHANGEABLE for choosing different forward per entry */
    result = doca_flow_pipe_create(pipe_cfg, &fwd, NULL, pipe);
destroy_pipe_cfg:
    doca_flow_pipe_cfg_destroy(pipe_cfg);
    return result;
}
 
/*
 * Add DOCA Flow pipe entries to the LPM pipe. one entry with full mask and one with 16 bits mask
 *
 * @pipe [in]: pipe of the entry
 * @port_id [in]: port ID of the entry
 * @status [in]: user context for adding entry
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise
 */
doca_error_t add_multi_fwd_pipe_entries(struct doca_flow_pipe *pipe, int port_id, struct entries_status *status)
{
    struct doca_flow_fwd fwd;
    struct doca_flow_match match;
    struct doca_flow_actions actions;
    struct doca_flow_pipe_entry *entry0, *entry1;
    doca_error_t result;
    doca_be32_t src_ip_addr;
 
    memset(&fwd, 0, sizeof(fwd));
    memset(&match, 0, sizeof(match));
    memset(&actions, 0, sizeof(actions));
 
    src_ip_addr = BE_IPV4_ADDR(1, 1, 1, 1);
    match.outer.ip4.src_ip = src_ip_addr;
 
    /* add the first entry with fwd port */
    fwd.type = DOCA_FLOW_FWD_PORT;
    fwd.port_id = port_id ^ 1;
 
    result = doca_flow_pipe_add_entry(0, pipe, &match, &actions, NULL, &fwd, 0, status, &entry0);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to add first entry: %s", doca_error_get_descr(result));
        return result;
    }
 
    src_ip_addr = BE_IPV4_ADDR(2, 2, 2, 2);
    match.outer.ip4.src_ip = src_ip_addr;
 
    /* add the second entry with fwd drop */
    fwd.type = DOCA_FLOW_FWD_DROP;
 
    result = doca_flow_pipe_add_entry(0, pipe, &match, &actions, NULL, &fwd, 0, status, &entry1);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to add second entry: %s", doca_error_get_descr(result));
        return result;
    }
 
    return DOCA_SUCCESS;
}
 
/*
 * Run flow_multi_fwd sample
 *
 * @nb_queues [in]: number of queues the sample will use
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise
 */
doca_error_t flow_multi_fwd(int nb_queues)
{
    int nb_ports = 2;
    struct flow_resources resource = {0};
    uint32_t nr_shared_resources[SHARED_RESOURCE_NUM_VALUES] = {0};
    struct doca_flow_port *ports[nb_ports];
    struct doca_dev *dev_arr[nb_ports];
    uint32_t actions_mem_size[nb_ports];
    struct doca_flow_pipe *pipe;
    int port_id;
    struct entries_status status;
    int num_of_entries = 2;
    doca_error_t result;
 
    result = init_doca_flow(nb_queues, "vnf,hws", &resource, nr_shared_resources);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init DOCA Flow: %s", doca_error_get_descr(result));
        return result;
    }
 
    memset(dev_arr, 0, sizeof(struct doca_dev *) * nb_ports);
    ARRAY_INIT(actions_mem_size, ACTIONS_MEM_SIZE(nb_queues, num_of_entries));
    result = init_doca_flow_ports(nb_ports, ports, true, dev_arr, actions_mem_size);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init DOCA ports");
        doca_flow_destroy();
        return result;
    }
 
    for (port_id = 0; port_id < nb_ports; port_id++) {
        memset(&status, 0, sizeof(status));
 
        result = create_multi_fwd_pipe(ports[port_id], &pipe);
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to create pipe: %s", doca_error_get_descr(result));
            stop_doca_flow_ports(nb_ports, ports);
            doca_flow_destroy();
            return result;
        }
 
        result = add_multi_fwd_pipe_entries(pipe, port_id, &status);
        if (result != DOCA_SUCCESS) {
            stop_doca_flow_ports(nb_ports, ports);
            doca_flow_destroy();
            return result;
        }
 
        result = doca_flow_entries_process(ports[port_id], 0, DEFAULT_TIMEOUT_US, num_of_entries);
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to process entries: %s", doca_error_get_descr(result));
            stop_doca_flow_ports(nb_ports, ports);
            doca_flow_destroy();
            return result;
        }
 
        if (status.nb_processed != num_of_entries || status.failure) {
            DOCA_LOG_ERR("Failed to process entries");
            stop_doca_flow_ports(nb_ports, ports);
            doca_flow_destroy();
            return DOCA_ERROR_BAD_STATE;
        }
    }
 
    DOCA_LOG_INFO("Wait few seconds for packets to arrive");
    sleep(5);
 
    result = stop_doca_flow_ports(nb_ports, ports);
    doca_flow_destroy();
    return result;
}