1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2016-2017 Intel Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <unistd.h> 38 #include <stdint.h> 39 #include <stdarg.h> 40 #include <inttypes.h> 41 #include <sys/queue.h> 42 #include <errno.h> 43 #include <netinet/ip.h> 44 45 #include <rte_common.h> 46 #include <rte_memory.h> 47 #include <rte_eal.h> 48 #include <rte_launch.h> 49 #include <rte_per_lcore.h> 50 #include <rte_lcore.h> 51 #include <rte_branch_prediction.h> 52 #include <rte_atomic.h> 53 #include <rte_ring.h> 54 #include <rte_log.h> 55 #include <rte_debug.h> 56 #include <rte_mempool.h> 57 #include <rte_memcpy.h> 58 #include <rte_mbuf.h> 59 #include <rte_ether.h> 60 #include <rte_interrupts.h> 61 #include <rte_ethdev.h> 62 #include <rte_byteorder.h> 63 #include <rte_malloc.h> 64 #include <rte_string_fns.h> 65 #include <rte_efd.h> 66 #include <rte_ip.h> 67 68 #include "common.h" 69 #include "args.h" 70 #include "init.h" 71 72 /* 73 * When doing reads from the NIC or the node queues, 74 * use this batch size 75 */ 76 #define PACKET_READ_SIZE 32 77 78 /* 79 * Local buffers to put packets in, used to send packets in bursts to the 80 * nodes 81 */ 82 struct node_rx_buf { 83 struct rte_mbuf *buffer[PACKET_READ_SIZE]; 84 uint16_t count; 85 }; 86 87 struct efd_stats { 88 uint64_t distributed; 89 uint64_t drop; 90 } flow_dist_stats; 91 92 /* One buffer per node rx queue - dynamically allocate array */ 93 static struct node_rx_buf *cl_rx_buf; 94 95 static const char * 96 get_printable_mac_addr(uint16_t port) 97 { 98 static const char err_address[] = "00:00:00:00:00:00"; 99 static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)]; 100 struct ether_addr mac; 101 102 if (unlikely(port >= RTE_MAX_ETHPORTS)) 103 return err_address; 104 if (unlikely(addresses[port][0] == '\0')) { 105 rte_eth_macaddr_get(port, &mac); 106 snprintf(addresses[port], sizeof(addresses[port]), 107 "%02x:%02x:%02x:%02x:%02x:%02x\n", 108 mac.addr_bytes[0], mac.addr_bytes[1], 109 mac.addr_bytes[2], mac.addr_bytes[3], 110 mac.addr_bytes[4], mac.addr_bytes[5]); 111 } 112 return addresses[port]; 113 } 114 115 /* 116 * This function displays the recorded statistics for each port 117 * and for each node. It uses ANSI terminal codes to clear 118 * screen when called. It is called from a single non-master 119 * thread in the server process, when the process is run with more 120 * than one lcore enabled. 121 */ 122 static void 123 do_stats_display(void) 124 { 125 unsigned int i, j; 126 const char clr[] = {27, '[', '2', 'J', '\0'}; 127 const char topLeft[] = {27, '[', '1', ';', '1', 'H', '\0'}; 128 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS]; 129 uint64_t node_tx[MAX_NODES], node_tx_drop[MAX_NODES]; 130 131 /* to get TX stats, we need to do some summing calculations */ 132 memset(port_tx, 0, sizeof(port_tx)); 133 memset(port_tx_drop, 0, sizeof(port_tx_drop)); 134 memset(node_tx, 0, sizeof(node_tx)); 135 memset(node_tx_drop, 0, sizeof(node_tx_drop)); 136 137 for (i = 0; i < num_nodes; i++) { 138 const struct tx_stats *tx = &info->tx_stats[i]; 139 140 for (j = 0; j < info->num_ports; j++) { 141 const uint64_t tx_val = tx->tx[info->id[j]]; 142 const uint64_t drop_val = tx->tx_drop[info->id[j]]; 143 144 port_tx[j] += tx_val; 145 port_tx_drop[j] += drop_val; 146 node_tx[i] += tx_val; 147 node_tx_drop[i] += drop_val; 148 } 149 } 150 151 /* Clear screen and move to top left */ 152 printf("%s%s", clr, topLeft); 153 154 printf("PORTS\n"); 155 printf("-----\n"); 156 for (i = 0; i < info->num_ports; i++) 157 printf("Port %u: '%s'\t", (unsigned int)info->id[i], 158 get_printable_mac_addr(info->id[i])); 159 printf("\n\n"); 160 for (i = 0; i < info->num_ports; i++) { 161 printf("Port %u - rx: %9"PRIu64"\t" 162 "tx: %9"PRIu64"\n", 163 (unsigned int)info->id[i], info->rx_stats.rx[i], 164 port_tx[i]); 165 } 166 167 printf("\nSERVER\n"); 168 printf("-----\n"); 169 printf("distributed: %9"PRIu64", drop: %9"PRIu64"\n", 170 flow_dist_stats.distributed, flow_dist_stats.drop); 171 172 printf("\nNODES\n"); 173 printf("-------\n"); 174 for (i = 0; i < num_nodes; i++) { 175 const unsigned long long rx = nodes[i].stats.rx; 176 const unsigned long long rx_drop = nodes[i].stats.rx_drop; 177 const struct filter_stats *filter = &info->filter_stats[i]; 178 179 printf("Node %2u - rx: %9llu, rx_drop: %9llu\n" 180 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n" 181 " filter_passed: %9"PRIu64", " 182 "filter_drop: %9"PRIu64"\n", 183 i, rx, rx_drop, node_tx[i], node_tx_drop[i], 184 filter->passed, filter->drop); 185 } 186 187 printf("\n"); 188 } 189 190 /* 191 * The function called from each non-master lcore used by the process. 192 * The test_and_set function is used to randomly pick a single lcore on which 193 * the code to display the statistics will run. Otherwise, the code just 194 * repeatedly sleeps. 195 */ 196 static int 197 sleep_lcore(__attribute__((unused)) void *dummy) 198 { 199 /* Used to pick a display thread - static, so zero-initialised */ 200 static rte_atomic32_t display_stats; 201 202 /* Only one core should display stats */ 203 if (rte_atomic32_test_and_set(&display_stats)) { 204 const unsigned int sleeptime = 1; 205 206 printf("Core %u displaying statistics\n", rte_lcore_id()); 207 208 /* Longer initial pause so above printf is seen */ 209 sleep(sleeptime * 3); 210 211 /* Loop forever: sleep always returns 0 or <= param */ 212 while (sleep(sleeptime) <= sleeptime) 213 do_stats_display(); 214 } 215 return 0; 216 } 217 218 /* 219 * Function to set all the node statistic values to zero. 220 * Called at program startup. 221 */ 222 static void 223 clear_stats(void) 224 { 225 unsigned int i; 226 227 for (i = 0; i < num_nodes; i++) 228 nodes[i].stats.rx = nodes[i].stats.rx_drop = 0; 229 } 230 231 /* 232 * send a burst of traffic to a node, assuming there are packets 233 * available to be sent to this node 234 */ 235 static void 236 flush_rx_queue(uint16_t node) 237 { 238 uint16_t j; 239 struct node *cl; 240 241 if (cl_rx_buf[node].count == 0) 242 return; 243 244 cl = &nodes[node]; 245 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[node].buffer, 246 cl_rx_buf[node].count, NULL) != cl_rx_buf[node].count){ 247 for (j = 0; j < cl_rx_buf[node].count; j++) 248 rte_pktmbuf_free(cl_rx_buf[node].buffer[j]); 249 cl->stats.rx_drop += cl_rx_buf[node].count; 250 } else 251 cl->stats.rx += cl_rx_buf[node].count; 252 253 cl_rx_buf[node].count = 0; 254 } 255 256 /* 257 * marks a packet down to be sent to a particular node process 258 */ 259 static inline void 260 enqueue_rx_packet(uint8_t node, struct rte_mbuf *buf) 261 { 262 cl_rx_buf[node].buffer[cl_rx_buf[node].count++] = buf; 263 } 264 265 /* 266 * This function takes a group of packets and routes them 267 * individually to the node process. Very simply round-robins the packets 268 * without checking any of the packet contents. 269 */ 270 static void 271 process_packets(uint32_t port_num __rte_unused, struct rte_mbuf *pkts[], 272 uint16_t rx_count, unsigned int socket_id) 273 { 274 uint16_t i; 275 uint8_t node; 276 efd_value_t data[RTE_EFD_BURST_MAX]; 277 const void *key_ptrs[RTE_EFD_BURST_MAX]; 278 279 struct ipv4_hdr *ipv4_hdr; 280 uint32_t ipv4_dst_ip[RTE_EFD_BURST_MAX]; 281 282 for (i = 0; i < rx_count; i++) { 283 /* Handle IPv4 header.*/ 284 ipv4_hdr = rte_pktmbuf_mtod_offset(pkts[i], struct ipv4_hdr *, 285 sizeof(struct ether_hdr)); 286 ipv4_dst_ip[i] = ipv4_hdr->dst_addr; 287 key_ptrs[i] = (void *)&ipv4_dst_ip[i]; 288 } 289 290 rte_efd_lookup_bulk(efd_table, socket_id, rx_count, 291 (const void **) key_ptrs, data); 292 for (i = 0; i < rx_count; i++) { 293 node = (uint8_t) ((uintptr_t)data[i]); 294 295 if (node >= num_nodes) { 296 /* 297 * Node is out of range, which means that 298 * flow has not been inserted 299 */ 300 flow_dist_stats.drop++; 301 rte_pktmbuf_free(pkts[i]); 302 } else { 303 flow_dist_stats.distributed++; 304 enqueue_rx_packet(node, pkts[i]); 305 } 306 } 307 308 for (i = 0; i < num_nodes; i++) 309 flush_rx_queue(i); 310 } 311 312 /* 313 * Function called by the master lcore of the DPDK process. 314 */ 315 static void 316 do_packet_forwarding(void) 317 { 318 unsigned int port_num = 0; /* indexes the port[] array */ 319 unsigned int socket_id = rte_socket_id(); 320 321 for (;;) { 322 struct rte_mbuf *buf[PACKET_READ_SIZE]; 323 uint16_t rx_count; 324 325 /* read a port */ 326 rx_count = rte_eth_rx_burst(info->id[port_num], 0, 327 buf, PACKET_READ_SIZE); 328 info->rx_stats.rx[port_num] += rx_count; 329 330 /* Now process the NIC packets read */ 331 if (likely(rx_count > 0)) 332 process_packets(port_num, buf, rx_count, socket_id); 333 334 /* move to next port */ 335 if (++port_num == info->num_ports) 336 port_num = 0; 337 } 338 } 339 340 int 341 main(int argc, char *argv[]) 342 { 343 /* initialise the system */ 344 if (init(argc, argv) < 0) 345 return -1; 346 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 347 348 cl_rx_buf = calloc(num_nodes, sizeof(cl_rx_buf[0])); 349 350 /* clear statistics */ 351 clear_stats(); 352 353 /* put all other cores to sleep bar master */ 354 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER); 355 356 do_packet_forwarding(); 357 return 0; 358 } 359