lib/librte_pmd_pcap/rte_eth_pcap.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   Copyright(c) 2014 6WIND S.A.
   6  *   All rights reserved.
   7  *
   8  *   Redistribution and use in source and binary forms, with or without
   9  *   modification, are permitted provided that the following conditions
  10  *   are met:
  11  *
  12  *     * Redistributions of source code must retain the above copyright
  13  *       notice, this list of conditions and the following disclaimer.
  14  *     * Redistributions in binary form must reproduce the above copyright
  15  *       notice, this list of conditions and the following disclaimer in
  16  *       the documentation and/or other materials provided with the
  17  *       distribution.
  18  *     * Neither the name of Intel Corporation nor the names of its
  19  *       contributors may be used to endorse or promote products derived
  20  *       from this software without specific prior written permission.
  21  *
  22  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  26  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  27  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  28  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  32  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <time.h>
  36 #include <rte_mbuf.h>
  37 #include <rte_ethdev.h>
  38 #include <rte_malloc.h>
  39 #include <rte_memcpy.h>
  40 #include <rte_string_fns.h>
  41 #include <rte_cycles.h>
  42 #include <rte_kvargs.h>
  43 #include <rte_dev.h>
  44
  45 #include <net/if.h>
  46
  47 #include <pcap.h>
  48
  49 #define RTE_ETH_PCAP_SNAPSHOT_LEN 65535
  50 #define RTE_ETH_PCAP_SNAPLEN 4096
  51 #define RTE_ETH_PCAP_PROMISC 1
  52 #define RTE_ETH_PCAP_TIMEOUT -1
  53 #define ETH_PCAP_RX_PCAP_ARG  "rx_pcap"
  54 #define ETH_PCAP_TX_PCAP_ARG  "tx_pcap"
  55 #define ETH_PCAP_RX_IFACE_ARG "rx_iface"
  56 #define ETH_PCAP_TX_IFACE_ARG "tx_iface"
  57 #define ETH_PCAP_IFACE_ARG    "iface"
  58
  59 static char errbuf[PCAP_ERRBUF_SIZE];
  60 static struct timeval start_time;
  61 static uint64_t start_cycles;
  62 static uint64_t hz;
  63
  64 struct pcap_rx_queue {
  65         pcap_t *pcap;
  66         uint8_t in_port;
  67         struct rte_mempool *mb_pool;
  68         volatile unsigned long rx_pkts;
  69         volatile unsigned long err_pkts;
  70         const char *name;
  71         const char *type;
  72 };
  73
  74 struct pcap_tx_queue {
  75         pcap_dumper_t *dumper;
  76         pcap_t *pcap;
  77         volatile unsigned long tx_pkts;
  78         volatile unsigned long err_pkts;
  79         const char *name;
  80         const char *type;
  81 };
  82
  83 struct rx_pcaps {
  84         unsigned num_of_rx;
  85         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  86         const char *names[RTE_PMD_RING_MAX_RX_RINGS];
  87         const char *types[RTE_PMD_RING_MAX_RX_RINGS];
  88 };
  89
  90 struct tx_pcaps {
  91         unsigned num_of_tx;
  92         pcap_dumper_t *dumpers[RTE_PMD_RING_MAX_TX_RINGS];
  93         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  94         const char *names[RTE_PMD_RING_MAX_RX_RINGS];
  95         const char *types[RTE_PMD_RING_MAX_RX_RINGS];
  96 };
  97
  98 struct pmd_internals {
  99         struct pcap_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
 100         struct pcap_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
 101         unsigned nb_rx_queues;
 102         unsigned nb_tx_queues;
 103         int if_index;
 104         int single_iface;
 105 };
 106
 107 const char *valid_arguments[] = {
 108         ETH_PCAP_RX_PCAP_ARG,
 109         ETH_PCAP_TX_PCAP_ARG,
 110         ETH_PCAP_RX_IFACE_ARG,
 111         ETH_PCAP_TX_IFACE_ARG,
 112         ETH_PCAP_IFACE_ARG,
 113         NULL
 114 };
 115
 116 static int open_single_tx_pcap(const char *pcap_filename, pcap_dumper_t **dumper);
 117 static int open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap);
 118 static int open_single_iface(const char *iface, pcap_t **pcap);
 119
 120 static struct ether_addr eth_addr = { .addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 } };
 121 static const char *drivername = "Pcap PMD";
 122 static struct rte_eth_link pmd_link = {
 123                 .link_speed = 10000,
 124                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 125                 .link_status = 0
 126 };
 127
 128
 129 static uint16_t
 130 eth_pcap_rx(void *queue,
 131                 struct rte_mbuf **bufs,
 132                 uint16_t nb_pkts)
 133 {
 134         unsigned i;
 135         struct pcap_pkthdr header;
 136         const u_char *packet;
 137         struct rte_mbuf *mbuf;
 138         struct pcap_rx_queue *pcap_q = queue;
 139         struct rte_pktmbuf_pool_private *mbp_priv;
 140         uint16_t num_rx = 0;
 141         uint16_t buf_size;
 142
 143         if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0))
 144                 return 0;
 145
 146         /* Reads the given number of packets from the pcap file one by one
 147          * and copies the packet data into a newly allocated mbuf to return.
 148          */
 149         for (i = 0; i < nb_pkts; i++) {
 150                 /* Get the next PCAP packet */
 151                 packet = pcap_next(pcap_q->pcap, &header);
 152                 if (unlikely(packet == NULL))
 153                         break;
 154                 else
 155                         mbuf = rte_pktmbuf_alloc(pcap_q->mb_pool);
 156                 if (unlikely(mbuf == NULL))
 157                         break;
 158
 159                 /* Now get the space available for data in the mbuf */
 160                 mbp_priv =  rte_mempool_get_priv(pcap_q->mb_pool);
 161                 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
 162                                 RTE_PKTMBUF_HEADROOM);
 163
 164                 if (header.len <= buf_size) {
 165                         /* pcap packet will fit in the mbuf, go ahead and copy */
 166                         rte_memcpy(rte_pktmbuf_mtod(mbuf, void *), packet,
 167                                         header.len);
 168                         mbuf->data_len = (uint16_t)header.len;
 169                         mbuf->pkt_len = mbuf->data_len;
 170                         mbuf->port = pcap_q->in_port;
 171                         bufs[num_rx] = mbuf;
 172                         num_rx++;
 173                 } else {
 174                         /* pcap packet will not fit in the mbuf, so drop packet */
 175                         RTE_LOG(ERR, PMD,
 176                                         "PCAP packet %d bytes will not fit in mbuf (%d bytes)\n",
 177                                         header.len, buf_size);
 178                         rte_pktmbuf_free(mbuf);
 179                 }
 180         }
 181         pcap_q->rx_pkts += num_rx;
 182         return num_rx;
 183 }
 184
 185 static inline void
 186 calculate_timestamp(struct timeval *ts) {
 187         uint64_t cycles;
 188         struct timeval cur_time;
 189
 190         cycles = rte_get_timer_cycles() - start_cycles;
 191         cur_time.tv_sec = cycles / hz;
 192         cur_time.tv_usec = (cycles % hz) * 10e6 / hz;
 193         timeradd(&start_time, &cur_time, ts);
 194 }
 195
 196 /*
 197  * Callback to handle writing packets to a pcap file.
 198  */
 199 static uint16_t
 200 eth_pcap_tx_dumper(void *queue,
 201                 struct rte_mbuf **bufs,
 202                 uint16_t nb_pkts)
 203 {
 204         unsigned i;
 205         struct rte_mbuf *mbuf;
 206         struct pcap_tx_queue *dumper_q = queue;
 207         uint16_t num_tx = 0;
 208         struct pcap_pkthdr header;
 209
 210         if (dumper_q->dumper == NULL || nb_pkts == 0)
 211                 return 0;
 212
 213         /* writes the nb_pkts packets to the previously opened pcap file dumper */
 214         for (i = 0; i < nb_pkts; i++) {
 215                 mbuf = bufs[i];
 216                 calculate_timestamp(&header.ts);
 217                 header.len = mbuf->data_len;
 218                 header.caplen = header.len;
 219                 pcap_dump((u_char *)dumper_q->dumper, &header,
 220                                 rte_pktmbuf_mtod(mbuf, void*));
 221                 rte_pktmbuf_free(mbuf);
 222                 num_tx++;
 223         }
 224
 225         /*
 226          * Since there's no place to hook a callback when the forwarding
 227          * process stops and to make sure the pcap file is actually written,
 228          * we flush the pcap dumper within each burst.
 229          */
 230         pcap_dump_flush(dumper_q->dumper);
 231         dumper_q->tx_pkts += num_tx;
 232         dumper_q->err_pkts += nb_pkts - num_tx;
 233         return num_tx;
 234 }
 235
 236 /*
 237  * Callback to handle sending packets through a real NIC.
 238  */
 239 static uint16_t
 240 eth_pcap_tx(void *queue,
 241                 struct rte_mbuf **bufs,
 242                 uint16_t nb_pkts)
 243 {
 244         unsigned i;
 245         int ret;
 246         struct rte_mbuf *mbuf;
 247         struct pcap_tx_queue *tx_queue = queue;
 248         uint16_t num_tx = 0;
 249
 250         if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
 251                 return 0;
 252
 253         for (i = 0; i < nb_pkts; i++) {
 254                 mbuf = bufs[i];
 255                 ret = pcap_sendpacket(tx_queue->pcap,
 256                                 rte_pktmbuf_mtod(mbuf, u_char *),
 257                                 mbuf->data_len);
 258                 if (unlikely(ret != 0))
 259                         break;
 260                 num_tx++;
 261                 rte_pktmbuf_free(mbuf);
 262         }
 263
 264         tx_queue->tx_pkts += num_tx;
 265         tx_queue->err_pkts += nb_pkts - num_tx;
 266         return num_tx;
 267 }
 268
 269 static int
 270 eth_dev_start(struct rte_eth_dev *dev)
 271 {
 272         unsigned i;
 273         struct pmd_internals *internals = dev->data->dev_private;
 274         struct pcap_tx_queue *tx;
 275         struct pcap_rx_queue *rx;
 276
 277         /* Special iface case. Single pcap is open and shared between tx/rx. */
 278         if (internals->single_iface) {
 279                 tx = &internals->tx_queue[0];
 280                 rx = &internals->rx_queue[0];
 281
 282                 if (!tx->pcap && strcmp(tx->type, ETH_PCAP_IFACE_ARG) == 0) {
 283                         if (open_single_iface(tx->name, &tx->pcap) < 0)
 284                                 return -1;
 285                         rx->pcap = tx->pcap;
 286                 }
 287                 goto status_up;
 288         }
 289
 290         /* If not open already, open tx pcaps/dumpers */
 291         for (i = 0; i < internals->nb_tx_queues; i++) {
 292                 tx = &internals->tx_queue[i];
 293
 294                 if (!tx->dumper && strcmp(tx->type, ETH_PCAP_TX_PCAP_ARG) == 0) {
 295                         if (open_single_tx_pcap(tx->name, &tx->dumper) < 0)
 296                                 return -1;
 297                 }
 298
 299                 else if (!tx->pcap && strcmp(tx->type, ETH_PCAP_TX_IFACE_ARG) == 0) {
 300                         if (open_single_iface(tx->name, &tx->pcap) < 0)
 301                                 return -1;
 302                 }
 303         }
 304
 305         /* If not open already, open rx pcaps */
 306         for (i = 0; i < internals->nb_rx_queues; i++) {
 307                 rx = &internals->rx_queue[i];
 308
 309                 if (rx->pcap != NULL)
 310                         continue;
 311
 312                 if (strcmp(rx->type, ETH_PCAP_RX_PCAP_ARG) == 0) {
 313                         if (open_single_rx_pcap(rx->name, &rx->pcap) < 0)
 314                                 return -1;
 315                 }
 316
 317                 else if (strcmp(rx->type, ETH_PCAP_RX_IFACE_ARG) == 0) {
 318                         if (open_single_iface(rx->name, &rx->pcap) < 0)
 319                                 return -1;
 320                 }
 321         }
 322
 323 status_up:
 324
 325         dev->data->dev_link.link_status = 1;
 326         return 0;
 327 }
 328
 329 /*
 330  * This function gets called when the current port gets stopped.
 331  * Is the only place for us to close all the tx streams dumpers.
 332  * If not called the dumpers will be flushed within each tx burst.
 333  */
 334 static void
 335 eth_dev_stop(struct rte_eth_dev *dev)
 336 {
 337         unsigned i;
 338         struct pmd_internals *internals = dev->data->dev_private;
 339         struct pcap_tx_queue *tx;
 340         struct pcap_rx_queue *rx;
 341
 342         /* Special iface case. Single pcap is open and shared between tx/rx. */
 343         if (internals->single_iface) {
 344                 tx = &internals->tx_queue[0];
 345                 rx = &internals->rx_queue[0];
 346                 pcap_close(tx->pcap);
 347                 tx->pcap = NULL;
 348                 rx->pcap = NULL;
 349                 goto status_down;
 350         }
 351
 352         for (i = 0; i < internals->nb_tx_queues; i++) {
 353                 tx = &internals->tx_queue[i];
 354
 355                 if (tx->dumper != NULL) {
 356                         pcap_dump_close(tx->dumper);
 357                         tx->dumper = NULL;
 358                 }
 359
 360                 if (tx->pcap != NULL) {
 361                         pcap_close(tx->pcap);
 362                         tx->pcap = NULL;
 363                 }
 364         }
 365
 366         for (i = 0; i < internals->nb_rx_queues; i++) {
 367                 rx = &internals->rx_queue[i];
 368
 369                 if (rx->pcap != NULL) {
 370                         pcap_close(rx->pcap);
 371                         rx->pcap = NULL;
 372                 }
 373         }
 374
 375 status_down:
 376         dev->data->dev_link.link_status = 0;
 377 }
 378
 379 static int
 380 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 381 {
 382         return 0;
 383 }
 384
 385 static void
 386 eth_dev_info(struct rte_eth_dev *dev,
 387                 struct rte_eth_dev_info *dev_info)
 388 {
 389         struct pmd_internals *internals = dev->data->dev_private;
 390         dev_info->driver_name = drivername;
 391         dev_info->if_index = internals->if_index;
 392         dev_info->max_mac_addrs = 1;
 393         dev_info->max_rx_pktlen = (uint32_t) -1;
 394         dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
 395         dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
 396         dev_info->min_rx_bufsize = 0;
 397         dev_info->pci_dev = NULL;
 398 }
 399
 400 static void
 401 eth_stats_get(struct rte_eth_dev *dev,
 402                 struct rte_eth_stats *igb_stats)
 403 {
 404         unsigned i;
 405         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 406         const struct pmd_internals *internal = dev->data->dev_private;
 407
 408         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_rx_queues;
 409                         i++) {
 410                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 411                 rx_total += igb_stats->q_ipackets[i];
 412         }
 413
 414         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_tx_queues;
 415                         i++) {
 416                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 417                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 418                 tx_total += igb_stats->q_opackets[i];
 419                 tx_err_total += igb_stats->q_errors[i];
 420         }
 421
 422         igb_stats->ipackets = rx_total;
 423         igb_stats->opackets = tx_total;
 424         igb_stats->oerrors = tx_err_total;
 425 }
 426
 427 static void
 428 eth_stats_reset(struct rte_eth_dev *dev)
 429 {
 430         unsigned i;
 431         struct pmd_internals *internal = dev->data->dev_private;
 432         for (i = 0; i < internal->nb_rx_queues; i++)
 433                 internal->rx_queue[i].rx_pkts = 0;
 434         for (i = 0; i < internal->nb_tx_queues; i++) {
 435                 internal->tx_queue[i].tx_pkts = 0;
 436                 internal->tx_queue[i].err_pkts = 0;
 437         }
 438 }
 439
 440 static void
 441 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 442 {
 443 }
 444
 445 static void
 446 eth_queue_release(void *q __rte_unused)
 447 {
 448 }
 449
 450 static int
 451 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 452                 int wait_to_complete __rte_unused)
 453 {
 454         return 0;
 455 }
 456
 457 static int
 458 eth_rx_queue_setup(struct rte_eth_dev *dev,
 459                 uint16_t rx_queue_id,
 460                 uint16_t nb_rx_desc __rte_unused,
 461                 unsigned int socket_id __rte_unused,
 462                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 463                 struct rte_mempool *mb_pool)
 464 {
 465         struct pmd_internals *internals = dev->data->dev_private;
 466         struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id];
 467         pcap_q->mb_pool = mb_pool;
 468         dev->data->rx_queues[rx_queue_id] = pcap_q;
 469         pcap_q->in_port = dev->data->port_id;
 470         return 0;
 471 }
 472
 473 static int
 474 eth_tx_queue_setup(struct rte_eth_dev *dev,
 475                 uint16_t tx_queue_id,
 476                 uint16_t nb_tx_desc __rte_unused,
 477                 unsigned int socket_id __rte_unused,
 478                 const struct rte_eth_txconf *tx_conf __rte_unused)
 479 {
 480
 481         struct pmd_internals *internals = dev->data->dev_private;
 482         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 483         return 0;
 484 }
 485
 486 static struct eth_dev_ops ops = {
 487                 .dev_start = eth_dev_start,
 488                 .dev_stop =     eth_dev_stop,
 489                 .dev_close = eth_dev_close,
 490                 .dev_configure = eth_dev_configure,
 491                 .dev_infos_get = eth_dev_info,
 492                 .rx_queue_setup = eth_rx_queue_setup,
 493                 .tx_queue_setup = eth_tx_queue_setup,
 494                 .rx_queue_release = eth_queue_release,
 495                 .tx_queue_release = eth_queue_release,
 496                 .link_update = eth_link_update,
 497                 .stats_get = eth_stats_get,
 498                 .stats_reset = eth_stats_reset,
 499 };
 500
 501 /*
 502  * Function handler that opens the pcap file for reading a stores a
 503  * reference of it for use it later on.
 504  */
 505 static int
 506 open_rx_pcap(const char *key, const char *value, void *extra_args)
 507 {
 508         unsigned i;
 509         const char *pcap_filename = value;
 510         struct rx_pcaps *pcaps = extra_args;
 511         pcap_t *pcap = NULL;
 512
 513         for (i = 0; i < pcaps->num_of_rx; i++) {
 514                 if (open_single_rx_pcap(pcap_filename, &pcap) < 0)
 515                         return -1;
 516
 517                 pcaps->pcaps[i] = pcap;
 518                 pcaps->names[i] = pcap_filename;
 519                 pcaps->types[i] = key;
 520         }
 521
 522         return 0;
 523 }
 524
 525 static int
 526 open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap)
 527 {
 528         if ((*pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) {
 529                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf);
 530                 return -1;
 531         }
 532         return 0;
 533 }
 534
 535 /*
 536  * Opens a pcap file for writing and stores a reference to it
 537  * for use it later on.
 538  */
 539 static int
 540 open_tx_pcap(const char *key, const char *value, void *extra_args)
 541 {
 542         unsigned i;
 543         const char *pcap_filename = value;
 544         struct tx_pcaps *dumpers = extra_args;
 545         pcap_dumper_t *dumper;
 546
 547         for (i = 0; i < dumpers->num_of_tx; i++) {
 548                 if (open_single_tx_pcap(pcap_filename, &dumper) < 0)
 549                         return -1;
 550
 551                 dumpers->dumpers[i] = dumper;
 552                 dumpers->names[i] = pcap_filename;
 553                 dumpers->types[i] = key;
 554         }
 555
 556         return 0;
 557 }
 558
 559 static int
 560 open_single_tx_pcap(const char *pcap_filename, pcap_dumper_t **dumper)
 561 {
 562         pcap_t *tx_pcap;
 563         /*
 564          * We need to create a dummy empty pcap_t to use it
 565          * with pcap_dump_open(). We create big enough an Ethernet
 566          * pcap holder.
 567          */
 568
 569         if ((tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN))
 570                         == NULL) {
 571                 RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
 572                 return -1;
 573         }
 574
 575         /* The dumper is created using the previous pcap_t reference */
 576         if ((*dumper = pcap_dump_open(tx_pcap, pcap_filename)) == NULL) {
 577                 RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n", pcap_filename);
 578                 return -1;
 579         }
 580
 581         return 0;
 582 }
 583
 584 /*
 585  * pcap_open_live wrapper function
 586  */
 587 static inline int
 588 open_iface_live(const char *iface, pcap_t **pcap) {
 589         *pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN,
 590                         RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf);
 591
 592         if (*pcap == NULL) {
 593                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf);
 594                 return -1;
 595         }
 596         return 0;
 597 }
 598
 599 /*
 600  * Opens an interface for reading and writing
 601  */
 602 static inline int
 603 open_rx_tx_iface(const char *key, const char *value, void *extra_args)
 604 {
 605         const char *iface = value;
 606         struct rx_pcaps *pcaps = extra_args;
 607         pcap_t *pcap = NULL;
 608
 609         if (open_single_iface(iface, &pcap) < 0)
 610                 return -1;
 611
 612         pcaps->pcaps[0] = pcap;
 613         pcaps->names[0] = iface;
 614         pcaps->types[0] = key;
 615
 616         return 0;
 617 }
 618
 619 /*
 620  * Opens a NIC for reading packets from it
 621  */
 622 static inline int
 623 open_rx_iface(const char *key, const char *value, void *extra_args)
 624 {
 625         unsigned i;
 626         const char *iface = value;
 627         struct rx_pcaps *pcaps = extra_args;
 628         pcap_t *pcap = NULL;
 629
 630         for (i = 0; i < pcaps->num_of_rx; i++) {
 631                 if (open_single_iface(iface, &pcap) < 0)
 632                         return -1;
 633                 pcaps->pcaps[i] = pcap;
 634                 pcaps->names[i] = iface;
 635                 pcaps->types[i] = key;
 636         }
 637
 638         return 0;
 639 }
 640
 641 /*
 642  * Opens a NIC for writing packets to it
 643  */
 644 static int
 645 open_tx_iface(const char *key, const char *value, void *extra_args)
 646 {
 647         unsigned i;
 648         const char *iface = value;
 649         struct tx_pcaps *pcaps = extra_args;
 650         pcap_t *pcap;
 651
 652         for (i = 0; i < pcaps->num_of_tx; i++) {
 653                 if (open_single_iface(iface, &pcap) < 0)
 654                         return -1;
 655                 pcaps->pcaps[i] = pcap;
 656                 pcaps->names[i] = iface;
 657                 pcaps->types[i] = key;
 658         }
 659
 660         return 0;
 661 }
 662
 663 static int
 664 open_single_iface(const char *iface, pcap_t **pcap)
 665 {
 666         if (open_iface_live(iface, pcap) < 0) {
 667                 RTE_LOG(ERR, PMD, "Couldn't open interface %s\n", iface);
 668                 return -1;
 669         }
 670
 671         return 0;
 672 }
 673
 674 static int
 675 rte_pmd_init_internals(const char *name, const unsigned nb_rx_queues,
 676                 const unsigned nb_tx_queues,
 677                 const unsigned numa_node,
 678                 struct pmd_internals **internals,
 679                 struct rte_eth_dev **eth_dev,
 680                 struct rte_kvargs *kvlist)
 681 {
 682         struct rte_eth_dev_data *data = NULL;
 683         struct rte_pci_device *pci_dev = NULL;
 684         unsigned k_idx;
 685         struct rte_kvargs_pair *pair = NULL;
 686
 687         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 688                 pair = &kvlist->pairs[k_idx];
 689                 if (strstr(pair->key, ETH_PCAP_IFACE_ARG) != NULL)
 690                         break;
 691         }
 692
 693         RTE_LOG(INFO, PMD,
 694                         "Creating pcap-backed ethdev on numa socket %u\n", numa_node);
 695
 696         /* now do all data allocation - for eth_dev structure, dummy pci driver
 697          * and internal (private) data
 698          */
 699         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 700         if (data == NULL)
 701                 goto error;
 702
 703         pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
 704         if (pci_dev == NULL)
 705                 goto error;
 706
 707         *internals = rte_zmalloc_socket(name, sizeof(**internals), 0, numa_node);
 708         if (*internals == NULL)
 709                 goto error;
 710
 711         /* reserve an ethdev entry */
 712         *eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 713         if (*eth_dev == NULL)
 714                 goto error;
 715
 716         /* now put it all together
 717          * - store queue data in internals,
 718          * - store numa_node info in pci_driver
 719          * - point eth_dev_data to internals and pci_driver
 720          * - and point eth_dev structure to new eth_dev_data structure
 721          */
 722         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 723          * so the rings are local per-process */
 724
 725         (*internals)->nb_rx_queues = nb_rx_queues;
 726         (*internals)->nb_tx_queues = nb_tx_queues;
 727
 728         if (pair == NULL)
 729                 (*internals)->if_index = 0;
 730         else
 731                 (*internals)->if_index = if_nametoindex(pair->value);
 732
 733         pci_dev->numa_node = numa_node;
 734
 735         data->dev_private = *internals;
 736         data->port_id = (*eth_dev)->data->port_id;
 737         snprintf(data->name, sizeof(data->name), "%s", (*eth_dev)->data->name);
 738         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 739         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 740         data->dev_link = pmd_link;
 741         data->mac_addrs = &eth_addr;
 742
 743         (*eth_dev)->data = data;
 744         (*eth_dev)->dev_ops = &ops;
 745         (*eth_dev)->pci_dev = pci_dev;
 746
 747         return 0;
 748
 749         error: if (data)
 750                 rte_free(data);
 751         if (pci_dev)
 752                 rte_free(pci_dev);
 753         if (*internals)
 754                 rte_free(*internals);
 755         return -1;
 756 }
 757
 758 static int
 759 rte_eth_from_pcaps_n_dumpers(const char *name,
 760                 struct rx_pcaps *rx_queues,
 761                 const unsigned nb_rx_queues,
 762                 struct tx_pcaps *tx_queues,
 763                 const unsigned nb_tx_queues,
 764                 const unsigned numa_node,
 765                 struct rte_kvargs *kvlist)
 766 {
 767         struct pmd_internals *internals = NULL;
 768         struct rte_eth_dev *eth_dev = NULL;
 769         unsigned i;
 770
 771         /* do some parameter checking */
 772         if (rx_queues == NULL && nb_rx_queues > 0)
 773                 return -1;
 774         if (tx_queues == NULL && nb_tx_queues > 0)
 775                 return -1;
 776
 777         if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node,
 778                         &internals, &eth_dev, kvlist) < 0)
 779                 return -1;
 780
 781         for (i = 0; i < nb_rx_queues; i++) {
 782                 internals->rx_queue->pcap = rx_queues->pcaps[i];
 783                 internals->rx_queue->name = rx_queues->names[i];
 784                 internals->rx_queue->type = rx_queues->types[i];
 785         }
 786         for (i = 0; i < nb_tx_queues; i++) {
 787                 internals->tx_queue->dumper = tx_queues->dumpers[i];
 788                 internals->tx_queue->name = tx_queues->names[i];
 789                 internals->tx_queue->type = tx_queues->types[i];
 790         }
 791
 792         /* using multiple pcaps/interfaces */
 793         internals->single_iface = 0;
 794
 795         eth_dev->rx_pkt_burst = eth_pcap_rx;
 796         eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
 797
 798         return 0;
 799 }
 800
 801         struct rx_pcaps pcaps;
 802 static int
 803 rte_eth_from_pcaps(const char *name,
 804                 struct rx_pcaps *rx_queues,
 805                 const unsigned nb_rx_queues,
 806                 struct tx_pcaps *tx_queues,
 807                 const unsigned nb_tx_queues,
 808                 const unsigned numa_node,
 809                 struct rte_kvargs *kvlist,
 810                 int single_iface)
 811 {
 812         struct pmd_internals *internals = NULL;
 813         struct rte_eth_dev *eth_dev = NULL;
 814         unsigned i;
 815
 816         /* do some parameter checking */
 817         if (rx_queues == NULL && nb_rx_queues > 0)
 818                 return -1;
 819         if (tx_queues == NULL && nb_tx_queues > 0)
 820                 return -1;
 821
 822         if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node,
 823                         &internals, &eth_dev, kvlist) < 0)
 824                 return -1;
 825
 826         for (i = 0; i < nb_rx_queues; i++) {
 827                 internals->rx_queue->pcap = rx_queues->pcaps[i];
 828                 internals->rx_queue->name = rx_queues->names[i];
 829                 internals->rx_queue->type = rx_queues->types[i];
 830         }
 831         for (i = 0; i < nb_tx_queues; i++) {
 832                 internals->tx_queue->pcap = tx_queues->pcaps[i];
 833                 internals->tx_queue->name = tx_queues->names[i];
 834                 internals->tx_queue->type = tx_queues->types[i];
 835         }
 836
 837         /* store wether we are using a single interface for rx/tx or not */
 838         internals->single_iface = single_iface;
 839
 840         eth_dev->rx_pkt_burst = eth_pcap_rx;
 841         eth_dev->tx_pkt_burst = eth_pcap_tx;
 842
 843         return 0;
 844 }
 845
 846
 847 static int
 848 rte_pmd_pcap_devinit(const char *name, const char *params)
 849 {
 850         unsigned numa_node, using_dumpers = 0;
 851         int ret;
 852         struct rte_kvargs *kvlist;
 853         struct rx_pcaps pcaps;
 854         struct tx_pcaps dumpers;
 855
 856         RTE_LOG(INFO, PMD, "Initializing pmd_pcap for %s\n", name);
 857
 858         numa_node = rte_socket_id();
 859
 860         gettimeofday(&start_time, NULL);
 861         start_cycles = rte_get_timer_cycles();
 862         hz = rte_get_timer_hz();
 863
 864         kvlist = rte_kvargs_parse(params, valid_arguments);
 865         if (kvlist == NULL)
 866                 return -1;
 867
 868         /*
 869          * If iface argument is passed we open the NICs and use them for
 870          * reading / writing
 871          */
 872         if (rte_kvargs_count(kvlist, ETH_PCAP_IFACE_ARG) == 1) {
 873
 874                 ret = rte_kvargs_process(kvlist, ETH_PCAP_IFACE_ARG,
 875                                 &open_rx_tx_iface, &pcaps);
 876                 if (ret < 0)
 877                         return -1;
 878                 dumpers.pcaps[0] = pcaps.pcaps[0];
 879                 dumpers.names[0] = pcaps.names[0];
 880                 dumpers.types[0] = pcaps.types[0];
 881                 return rte_eth_from_pcaps(name, &pcaps, 1, &dumpers, 1,
 882                                 numa_node, kvlist, 1);
 883         }
 884
 885         /*
 886          * We check whether we want to open a RX stream from a real NIC or a
 887          * pcap file
 888          */
 889         if ((pcaps.num_of_rx = rte_kvargs_count(kvlist, ETH_PCAP_RX_PCAP_ARG))) {
 890                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_PCAP_ARG,
 891                                 &open_rx_pcap, &pcaps);
 892         } else {
 893                 pcaps.num_of_rx = rte_kvargs_count(kvlist,
 894                                 ETH_PCAP_RX_IFACE_ARG);
 895                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_IFACE_ARG,
 896                                 &open_rx_iface, &pcaps);
 897         }
 898
 899         if (ret < 0)
 900                 return -1;
 901
 902         /*
 903          * We check whether we want to open a TX stream to a real NIC or a
 904          * pcap file
 905          */
 906         if ((dumpers.num_of_tx = rte_kvargs_count(kvlist,
 907                         ETH_PCAP_TX_PCAP_ARG))) {
 908                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_PCAP_ARG,
 909                                 &open_tx_pcap, &dumpers);
 910                 using_dumpers = 1;
 911         } else {
 912                 dumpers.num_of_tx = rte_kvargs_count(kvlist,
 913                                 ETH_PCAP_TX_IFACE_ARG);
 914                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_IFACE_ARG,
 915                                 &open_tx_iface, &dumpers);
 916         }
 917
 918         if (ret < 0)
 919                 return -1;
 920
 921         if (using_dumpers)
 922                 return rte_eth_from_pcaps_n_dumpers(name, &pcaps, pcaps.num_of_rx,
 923                                 &dumpers, dumpers.num_of_tx, numa_node, kvlist);
 924
 925         return rte_eth_from_pcaps(name, &pcaps, pcaps.num_of_rx, &dumpers,
 926                         dumpers.num_of_tx, numa_node, kvlist, 0);
 927
 928 }
 929
 930 static struct rte_driver pmd_pcap_drv = {
 931         .name = "eth_pcap",
 932         .type = PMD_VDEV,
 933         .init = rte_pmd_pcap_devinit,
 934 };
 935
 936 PMD_REGISTER_DRIVER(pmd_pcap_drv);