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40 #include <sys/queue.h>
45 #include <rte_common.h>
46 #include <rte_memory.h>
47 #include <rte_memzone.h>
48 #include <rte_tailq.h>
50 #include <rte_atomic.h>
51 #include <rte_branch_prediction.h>
53 #include <rte_per_lcore.h>
54 #include <rte_launch.h>
55 #include <rte_lcore.h>
57 #include <rte_launch.h>
58 #include <rte_lcore.h>
59 #include <rte_debug.h>
60 #include <rte_mempool.h>
62 #include <rte_interrupts.h>
64 #include <rte_ether.h>
65 #include <rte_ethdev.h>
66 #include <rte_string_fns.h>
69 #include "init_drivers.h"
71 /* Number of packets to attempt to read from queue */
72 #define PKT_READ_SIZE ((uint16_t)32)
74 /* our client id number - tells us which rx queue to read, and NIC TX
75 * queue to write to. */
76 static uint8_t client_id = 0;
79 #define MBQ_CAPACITY 32
80 struct rte_mbuf *bufs[MBQ_CAPACITY];
84 /* maps input ports to output ports for packets */
85 static uint8_t output_ports[RTE_MAX_ETHPORTS];
87 /* buffers up a set of packet that are ready to send */
88 static struct mbuf_queue output_bufs[RTE_MAX_ETHPORTS];
90 /* shared data from server. We update statistics here */
91 static volatile struct tx_stats *tx_stats;
95 * print a usage message
98 usage(const char *progname)
100 printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname);
104 * Convert the client id number from a string to an int.
107 parse_client_num(const char *client)
112 if (client == NULL || *client == '\0')
115 temp = strtoul(client, &end, 10);
116 if (end == NULL || *end != '\0')
119 client_id = (uint8_t)temp;
124 * Parse the application arguments to the client app.
127 parse_app_args(int argc, char *argv[])
129 int option_index, opt;
130 char **argvopt = argv;
131 const char *progname = NULL;
132 static struct option lgopts[] = { /* no long options */
137 while ((opt = getopt_long(argc, argvopt, "n:", lgopts,
138 &option_index)) != EOF){
141 if (parse_client_num(optarg) != 0){
155 * set up output ports so that all traffic on port gets sent out
156 * its paired port. Index using actual port numbers since that is
157 * what comes in the mbuf structure.
159 static void configure_output_ports(const struct port_info *ports)
162 if (ports->num_ports > RTE_MAX_ETHPORTS)
163 rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n",
164 (unsigned)RTE_MAX_ETHPORTS);
165 for (i = 0; i < ports->num_ports - 1; i+=2){
166 uint8_t p1 = ports->id[i];
167 uint8_t p2 = ports->id[i+1];
168 output_ports[p1] = p2;
169 output_ports[p2] = p1;
175 send_packets(uint8_t port)
178 struct mbuf_queue *mbq = &output_bufs[port];
180 if (unlikely(mbq->top == 0))
183 sent = rte_eth_tx_burst(port, client_id, mbq->bufs, mbq->top);
184 if (unlikely(sent < mbq->top)){
185 for (i = sent; i < mbq->top; i++)
186 rte_pktmbuf_free(mbq->bufs[i]);
187 tx_stats->tx_drop[port] += (mbq->top - sent);
189 tx_stats->tx[port] += sent;
194 * Enqueue a packet to be sent on a particular port, but
195 * don't send it yet. Only when the buffer is full.
198 enqueue_packet(struct rte_mbuf *buf, uint8_t port)
200 struct mbuf_queue *mbq = &output_bufs[port];
201 mbq->bufs[mbq->top++] = buf;
203 if (mbq->top == MBQ_CAPACITY)
208 * This function performs routing of packets
209 * Just sends each input packet out an output port based solely on the input
210 * port it arrived on.
213 handle_packet(struct rte_mbuf *buf)
215 const uint8_t in_port = buf->pkt.in_port;
216 const uint8_t out_port = output_ports[in_port];
218 enqueue_packet(buf, out_port);
222 * Application main function - loops through
223 * receiving and processing packets. Never returns
226 main(int argc, char *argv[])
228 const struct rte_memzone *mz;
229 struct rte_ring *rx_ring;
230 struct rte_mempool *mp;
231 struct port_info *ports;
232 int need_flush = 0; /* indicates whether we have unsent packets */
234 void *pkts[PKT_READ_SIZE];
236 if ((retval = rte_eal_init(argc, argv)) < 0)
241 if (parse_app_args(argc, argv) < 0)
242 rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n");
244 if (init_drivers() < 0)
245 rte_exit(EXIT_FAILURE, "Cannot get NIC ports\n");
246 if (rte_eth_dev_count() == 0)
247 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
249 rx_ring = rte_ring_lookup(get_rx_queue_name(client_id));
251 rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n");
253 mp = rte_mempool_lookup(PKTMBUF_POOL_NAME);
255 rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n");
257 mz = rte_memzone_lookup(MZ_PORT_INFO);
259 rte_exit(EXIT_FAILURE, "Cannot get port info structure\n");
261 tx_stats = &(ports->tx_stats[client_id]);
263 configure_output_ports(ports);
265 RTE_LOG(INFO, APP, "Finished Process Init.\n");
267 printf("\nClient process %d handling packets\n", client_id);
268 printf("[Press Ctrl-C to quit ...]\n");
271 uint16_t i, rx_pkts = PKT_READ_SIZE;
274 /* try dequeuing max possible packets first, if that fails, get the
275 * most we can. Loop body should only execute once, maximum */
276 while (rx_pkts > 0 &&
277 unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, rx_pkts) != 0))
278 rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), PKT_READ_SIZE);
280 if (unlikely(rx_pkts == 0)){
282 for (port = 0; port < ports->num_ports; port++)
283 send_packets(ports->id[port]);
288 for (i = 0; i < rx_pkts; i++)
289 handle_packet(pkts[i]);