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Diffstat (limited to 'examples/server_node_efd/node/node.c')
| -rw-r--r-- | examples/server_node_efd/node/node.c | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/examples/server_node_efd/node/node.c b/examples/server_node_efd/node/node.c new file mode 100644 index 00000000..f780b926 --- /dev/null +++ b/examples/server_node_efd/node/node.c @@ -0,0 +1,417 @@ +/*- + * 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 <stdint.h> +#include <stdio.h> +#include <inttypes.h> +#include <stdarg.h> +#include <errno.h> +#include <sys/queue.h> +#include <stdlib.h> +#include <getopt.h> +#include <string.h> + +#include <rte_common.h> +#include <rte_malloc.h> +#include <rte_memory.h> +#include <rte_memzone.h> +#include <rte_eal.h> +#include <rte_atomic.h> +#include <rte_branch_prediction.h> +#include <rte_log.h> +#include <rte_per_lcore.h> +#include <rte_launch.h> +#include <rte_lcore.h> +#include <rte_ring.h> +#include <rte_launch.h> +#include <rte_lcore.h> +#include <rte_debug.h> +#include <rte_mempool.h> +#include <rte_mbuf.h> +#include <rte_interrupts.h> +#include <rte_pci.h> +#include <rte_ether.h> +#include <rte_ethdev.h> +#include <rte_string_fns.h> +#include <rte_ip.h> + +#include "common.h" + +/* Number of packets to attempt to read from queue */ +#define PKT_READ_SIZE ((uint16_t)32) + +/* + * Our node id number - tells us which rx queue to read, and NIC TX + * queue to write to. + */ +static uint8_t node_id; + +#define MBQ_CAPACITY 32 + +/* maps input ports to output ports for packets */ +static uint8_t output_ports[RTE_MAX_ETHPORTS]; + +/* buffers up a set of packet that are ready to send */ +struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS]; + +/* shared data from server. We update statistics here */ +static struct tx_stats *tx_stats; + +static struct filter_stats *filter_stats; + +/* + * print a usage message + */ +static void +usage(const char *progname) +{ + printf("Usage: %s [EAL args] -- -n <node_id>\n\n", progname); +} + +/* + * Convert the node id number from a string to an int. + */ +static int +parse_node_num(const char *node) +{ + char *end = NULL; + unsigned long temp; + + if (node == NULL || *node == '\0') + return -1; + + temp = strtoul(node, &end, 10); + if (end == NULL || *end != '\0') + return -1; + + node_id = (uint8_t)temp; + return 0; +} + +/* + * Parse the application arguments to the node app. + */ +static int +parse_app_args(int argc, char *argv[]) +{ + int option_index, opt; + char **argvopt = argv; + const char *progname = NULL; + static struct option lgopts[] = { /* no long options */ + {NULL, 0, 0, 0 } + }; + progname = argv[0]; + + while ((opt = getopt_long(argc, argvopt, "n:", lgopts, + &option_index)) != EOF) { + switch (opt) { + case 'n': + if (parse_node_num(optarg) != 0) { + usage(progname); + return -1; + } + break; + default: + usage(progname); + return -1; + } + } + return 0; +} + +/* + * Tx buffer error callback + */ +static void +flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count, + void *userdata) { + int i; + uint8_t port_id = (uintptr_t)userdata; + + tx_stats->tx_drop[port_id] += count; + + /* free the mbufs which failed from transmit */ + for (i = 0; i < count; i++) + rte_pktmbuf_free(unsent[i]); + +} + +static void +configure_tx_buffer(uint8_t port_id, uint16_t size) +{ + int ret; + + /* Initialize TX buffers */ + tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer", + RTE_ETH_TX_BUFFER_SIZE(size), 0, + rte_eth_dev_socket_id(port_id)); + if (tx_buffer[port_id] == NULL) + rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx " + "on port %u\n", (unsigned int) port_id); + + rte_eth_tx_buffer_init(tx_buffer[port_id], size); + + ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id], + flush_tx_error_callback, (void *)(intptr_t)port_id); + if (ret < 0) + rte_exit(EXIT_FAILURE, "Cannot set error callback for " + "tx buffer on port %u\n", (unsigned int) port_id); +} + +/* + * set up output ports so that all traffic on port gets sent out + * its paired port. Index using actual port numbers since that is + * what comes in the mbuf structure. + */ +static void +configure_output_ports(const struct shared_info *info) +{ + int i; + + if (info->num_ports > RTE_MAX_ETHPORTS) + rte_exit(EXIT_FAILURE, "Too many ethernet ports. " + "RTE_MAX_ETHPORTS = %u\n", + (unsigned int)RTE_MAX_ETHPORTS); + for (i = 0; i < info->num_ports - 1; i += 2) { + uint8_t p1 = info->id[i]; + uint8_t p2 = info->id[i+1]; + + output_ports[p1] = p2; + output_ports[p2] = p1; + + configure_tx_buffer(p1, MBQ_CAPACITY); + configure_tx_buffer(p2, MBQ_CAPACITY); + + } +} + +/* + * Create the hash table that will contain the flows that + * the node will handle, which will be used to decide if packet + * is transmitted or dropped. + */ +static struct rte_hash * +create_hash_table(const struct shared_info *info) +{ + uint32_t num_flows_node = info->num_flows / info->num_nodes; + char name[RTE_HASH_NAMESIZE]; + struct rte_hash *h; + + /* create table */ + struct rte_hash_parameters hash_params = { + .entries = num_flows_node * 2, /* table load = 50% */ + .key_len = sizeof(uint32_t), /* Store IPv4 dest IP address */ + .socket_id = rte_socket_id(), + .hash_func_init_val = 0, + }; + + snprintf(name, sizeof(name), "hash_table_%d", node_id); + hash_params.name = name; + h = rte_hash_create(&hash_params); + + if (h == NULL) + rte_exit(EXIT_FAILURE, + "Problem creating the hash table for node %d\n", + node_id); + return h; +} + +static void +populate_hash_table(const struct rte_hash *h, const struct shared_info *info) +{ + unsigned int i; + int32_t ret; + uint32_t ip_dst; + uint32_t num_flows_node = 0; + uint64_t target_node; + + /* Add flows in table */ + for (i = 0; i < info->num_flows; i++) { + target_node = i % info->num_nodes; + if (target_node != node_id) + continue; + + ip_dst = rte_cpu_to_be_32(i); + + ret = rte_hash_add_key(h, (void *) &ip_dst); + if (ret < 0) + rte_exit(EXIT_FAILURE, "Unable to add entry %u " + "in hash table\n", i); + else + num_flows_node++; + + } + + printf("Hash table: Adding 0x%x keys\n", num_flows_node); +} + +/* + * This function performs routing of packets + * Just sends each input packet out an output port based solely on the input + * port it arrived on. + */ +static inline void +transmit_packet(struct rte_mbuf *buf) +{ + int sent; + const uint8_t in_port = buf->port; + const uint8_t out_port = output_ports[in_port]; + struct rte_eth_dev_tx_buffer *buffer = tx_buffer[out_port]; + + sent = rte_eth_tx_buffer(out_port, node_id, buffer, buf); + if (sent) + tx_stats->tx[out_port] += sent; + +} + +static inline void +handle_packets(struct rte_hash *h, struct rte_mbuf **bufs, uint16_t num_packets) +{ + struct ipv4_hdr *ipv4_hdr; + uint32_t ipv4_dst_ip[PKT_READ_SIZE]; + const void *key_ptrs[PKT_READ_SIZE]; + unsigned int i; + int32_t positions[PKT_READ_SIZE] = {0}; + + for (i = 0; i < num_packets; i++) { + /* Handle IPv4 header.*/ + ipv4_hdr = rte_pktmbuf_mtod_offset(bufs[i], struct ipv4_hdr *, + sizeof(struct ether_hdr)); + ipv4_dst_ip[i] = ipv4_hdr->dst_addr; + key_ptrs[i] = &ipv4_dst_ip[i]; + } + /* Check if packets belongs to any flows handled by this node */ + rte_hash_lookup_bulk(h, key_ptrs, num_packets, positions); + + for (i = 0; i < num_packets; i++) { + if (likely(positions[i] >= 0)) { + filter_stats->passed++; + transmit_packet(bufs[i]); + } else { + filter_stats->drop++; + /* Drop packet, as flow is not handled by this node */ + rte_pktmbuf_free(bufs[i]); + } + } +} + +/* + * Application main function - loops through + * receiving and processing packets. Never returns + */ +int +main(int argc, char *argv[]) +{ + const struct rte_memzone *mz; + struct rte_ring *rx_ring; + struct rte_hash *h; + struct rte_mempool *mp; + struct shared_info *info; + int need_flush = 0; /* indicates whether we have unsent packets */ + int retval; + void *pkts[PKT_READ_SIZE]; + uint16_t sent; + + retval = rte_eal_init(argc, argv); + if (retval < 0) + return -1; + argc -= retval; + argv += retval; + + if (parse_app_args(argc, argv) < 0) + rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n"); + + if (rte_eth_dev_count() == 0) + rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n"); + + rx_ring = rte_ring_lookup(get_rx_queue_name(node_id)); + if (rx_ring == NULL) + rte_exit(EXIT_FAILURE, "Cannot get RX ring - " + "is server process running?\n"); + + mp = rte_mempool_lookup(PKTMBUF_POOL_NAME); + if (mp == NULL) + rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n"); + + mz = rte_memzone_lookup(MZ_SHARED_INFO); + if (mz == NULL) + rte_exit(EXIT_FAILURE, "Cannot get port info structure\n"); + info = mz->addr; + tx_stats = &(info->tx_stats[node_id]); + filter_stats = &(info->filter_stats[node_id]); + + configure_output_ports(info); + + h = create_hash_table(info); + + populate_hash_table(h, info); + + RTE_LOG(INFO, APP, "Finished Process Init.\n"); + + printf("\nNode process %d handling packets\n", node_id); + printf("[Press Ctrl-C to quit ...]\n"); + + for (;;) { + uint16_t rx_pkts = PKT_READ_SIZE; + uint8_t port; + + /* + * Try dequeuing max possible packets first, if that fails, + * get the most we can. Loop body should only execute once, + * maximum + */ + while (rx_pkts > 0 && + unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, + rx_pkts, NULL) == 0)) + rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), + PKT_READ_SIZE); + + if (unlikely(rx_pkts == 0)) { + if (need_flush) + for (port = 0; port < info->num_ports; port++) { + sent = rte_eth_tx_buffer_flush( + info->id[port], + node_id, + tx_buffer[port]); + if (unlikely(sent)) + tx_stats->tx[port] += sent; + } + need_flush = 0; + continue; + } + + handle_packets(h, (struct rte_mbuf **)pkts, rx_pkts); + + need_flush = 1; + } +} |