flow_switch_sample.c

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/*
 * Copyright (c) 2023 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.
 *     * Neither the name of the NVIDIA 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 NVIDIA CORPORATION 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,
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 */
 
#include <string.h>
#include <unistd.h>
 
#include <rte_byteorder.h>
 
#include <doca_log.h>
#include <doca_flow.h>
 
#include "flow_common.h"
 
DOCA_LOG_REGISTER(FLOW_SWITCH);
 
#define NB_ENTRIES 2
 
static struct doca_flow_pipe_entry *entries[2 * NB_ENTRIES]; /* array for storing created entries */
 
/*
 * Create DOCA Flow pipe with 5 tuple match on the switch port.
 * Matched traffic will be forwarded to the port defined per entry.
 * Unmatched traffic will be dropped.
 *
 * @sw_port [in]: switch port
 * @pipe [out]: created pipe pointer
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t create_switch_pipe(struct doca_flow_port *sw_port, struct doca_flow_pipe **pipe)
{
    struct doca_flow_match match;
    struct doca_flow_monitor monitor;
    struct doca_flow_fwd fwd;
    struct doca_flow_fwd fwd_miss;
    struct doca_flow_pipe_cfg *pipe_cfg;
    doca_error_t result;
 
    memset(&match, 0, sizeof(match));
    memset(&monitor, 0, sizeof(monitor));
    memset(&fwd, 0, sizeof(fwd));
    memset(&fwd_miss, 0, sizeof(fwd_miss));
 
    match.parser_meta.outer_l3_type = DOCA_FLOW_L3_META_IPV4;
    match.parser_meta.outer_l4_type = DOCA_FLOW_L4_META_TCP;
    match.outer.l4_type_ext = DOCA_FLOW_L4_TYPE_EXT_TCP;
    match.outer.l3_type = DOCA_FLOW_L3_TYPE_IP4;
 
    /* Source, destination IP addresses and source, destination TCP ports are defined per entry */
    match.outer.ip4.src_ip = 0xffffffff;
    match.outer.ip4.dst_ip = 0xffffffff;
    match.outer.tcp.l4_port.src_port = 0xffff;
    match.outer.tcp.l4_port.dst_port = 0xffff;
 
    fwd.type = DOCA_FLOW_FWD_PORT;
 
    /* Port ID to forward to is defined per entry */
    fwd.port_id = 0xffff;
 
    /* Unmatched packets will be dropped */
    fwd_miss.type = DOCA_FLOW_FWD_DROP;
 
    monitor.counter_type = DOCA_FLOW_RESOURCE_TYPE_NON_SHARED;
 
    result = doca_flow_pipe_cfg_create(&pipe_cfg, sw_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, "SWITCH_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_nr_entries(pipe_cfg, NB_ENTRIES);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg nr_entries: %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_monitor(pipe_cfg, &monitor);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg monitor: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
 
    result = doca_flow_pipe_create(pipe_cfg, &fwd, &fwd_miss, pipe);
destroy_pipe_cfg:
    doca_flow_pipe_cfg_destroy(pipe_cfg);
    return result;
}
 
/*
 * Add DOCA Flow pipe entry to the pipe
 *
 * @switch_num [in]: switch number (1, 2 ...)
 * @pipe [in]: pipe of the entry
 * @status [in]: user context for adding entry
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t add_switch_pipe_entries(int switch_num, struct doca_flow_pipe *pipe, struct entries_status *status)
{
    struct doca_flow_match match;
    struct doca_flow_fwd fwd;
    enum doca_flow_flags_type flags = DOCA_FLOW_WAIT_FOR_BATCH;
    doca_error_t result;
    int entry_index = 0;
    int port_base;
    int entry_base = (switch_num - 1) * 2;
 
    port_base = (switch_num - 1) * 3;
    doca_be32_t dst_ip_addr;
    doca_be32_t src_ip_addr;
    doca_be16_t dst_port;
    doca_be16_t src_port;
 
    memset(&fwd, 0, sizeof(fwd));
    memset(&match, 0, sizeof(match));
 
    for (entry_index = 0; entry_index < NB_ENTRIES; entry_index++) {
        dst_ip_addr = BE_IPV4_ADDR(8, 8, 8, 8 + entry_base + entry_index);
        src_ip_addr = BE_IPV4_ADDR(1, 2, 3, 4 + entry_base + entry_index);
        dst_port = rte_cpu_to_be_16(80);
        src_port = rte_cpu_to_be_16(1234);
 
        match.outer.ip4.dst_ip = dst_ip_addr;
        match.outer.ip4.src_ip = src_ip_addr;
        match.outer.tcp.l4_port.dst_port = dst_port;
        match.outer.tcp.l4_port.src_port = src_port;
 
        fwd.type = DOCA_FLOW_FWD_PORT;
        fwd.port_id = port_base + 1 + entry_index; /* The port to forward to is defined based on the entry index
                                */
 
        /* last entry should be inserted with DOCA_FLOW_NO_WAIT flag */
        if (entry_index == NB_ENTRIES - 1)
            flags = DOCA_FLOW_NO_WAIT;
 
        result = doca_flow_pipe_add_entry(0,
                          pipe,
                          &match,
                          NULL,
                          NULL,
                          &fwd,
                          flags,
                          status,
                          &entries[entry_base + entry_index]);
 
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to add pipe entry: %s", doca_error_get_descr(result));
            return result;
        }
    }
 
    return DOCA_SUCCESS;
}
/*
 * Run flow_switch sample
 *
 * @nb_queues [in]: number of queues the sample will use
 * @nb_ports [in]: number of ports the sample will use
 * @dev_main [in]: the main doca proxy port
 * @dev_sec [in]: the second doca proxy port
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
doca_error_t flow_switch(int nb_queues, int nb_ports, struct doca_dev *dev_main, struct doca_dev *dev_sec)
{
    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 *pipe1;
    struct doca_flow_pipe *pipe2;
    struct doca_flow_resource_query query_stats;
    struct entries_status status;
    doca_error_t result;
    int entry_idx;
 
    memset(&status, 0, sizeof(status));
    resource.nr_counters = 2 * NB_ENTRIES; /* counter per entry */
 
    result = init_doca_flow(nb_queues, "switch,hws,isolated", &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);
    dev_arr[0] = dev_main;
    dev_arr[3] = dev_sec;
    ARRAY_INIT(actions_mem_size, ACTIONS_MEM_SIZE(nb_queues, NB_ENTRIES));
    result = init_doca_flow_ports(nb_ports, ports, false /* is_hairpin */, dev_arr, actions_mem_size);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init DOCA ports: %s", doca_error_get_descr(result));
        doca_flow_destroy();
        return result;
    }
 
    result = create_switch_pipe(doca_flow_port_switch_get(ports[0]), &pipe1);
    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_switch_pipe_entries(1, pipe1, &status);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to add entries to the pipe: %s", doca_error_get_descr(result));
        stop_doca_flow_ports(nb_ports, ports);
        doca_flow_destroy();
        return result;
    }
 
    result = doca_flow_entries_process(doca_flow_port_switch_get(ports[0]), 0, DEFAULT_TIMEOUT_US, NB_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;
    }
 
    result = create_switch_pipe(doca_flow_port_switch_get(ports[3]), &pipe2);
    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_switch_pipe_entries(2, pipe2, &status);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to add entries to the pipe: %s", doca_error_get_descr(result));
        stop_doca_flow_ports(nb_ports, ports);
        doca_flow_destroy();
        return result;
    }
 
    result = doca_flow_entries_process(doca_flow_port_switch_get(ports[3]), 0, DEFAULT_TIMEOUT_US, NB_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 != 2 * NB_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(15);
 
    /* dump entries counters */
    for (entry_idx = 0; entry_idx < 2 * NB_ENTRIES; entry_idx++) {
        result = doca_flow_resource_query_entry(entries[entry_idx], &query_stats);
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to query entry: %s", doca_error_get_descr(result));
            stop_doca_flow_ports(nb_ports, ports);
            doca_flow_destroy();
            return result;
        }
        DOCA_LOG_INFO("Entry in index: %d", entry_idx);
        DOCA_LOG_INFO("Total bytes: %ld", query_stats.counter.total_bytes);
        DOCA_LOG_INFO("Total packets: %ld", query_stats.counter.total_pkts);
    }
 
    result = stop_doca_flow_ports(nb_ports, ports);
    doca_flow_destroy();
    return result;
}