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 };
  71
  72 struct pcap_tx_queue {
  73         pcap_dumper_t *dumper;
  74         pcap_t *pcap;
  75         volatile unsigned long tx_pkts;
  76         volatile unsigned long err_pkts;
  77 };
  78
  79 struct rx_pcaps {
  80         unsigned num_of_rx;
  81         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  82 };
  83
  84 struct tx_pcaps {
  85         unsigned num_of_tx;
  86         pcap_dumper_t *dumpers[RTE_PMD_RING_MAX_TX_RINGS];
  87         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  88 };
  89
  90 struct pmd_internals {
  91         unsigned nb_rx_queues;
  92         unsigned nb_tx_queues;
  93
  94         int if_index;
  95
  96         struct pcap_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
  97         struct pcap_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
  98 };
  99
 100 const char *valid_arguments[] = {
 101         ETH_PCAP_RX_PCAP_ARG,
 102         ETH_PCAP_TX_PCAP_ARG,
 103         ETH_PCAP_RX_IFACE_ARG,
 104         ETH_PCAP_TX_IFACE_ARG,
 105         ETH_PCAP_IFACE_ARG,
 106         NULL
 107 };
 108
 109 static struct ether_addr eth_addr = { .addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 } };
 110 static const char *drivername = "Pcap PMD";
 111 static struct rte_eth_link pmd_link = {
 112                 .link_speed = 10000,
 113                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 114                 .link_status = 0
 115 };
 116
 117
 118 static uint16_t
 119 eth_pcap_rx(void *queue,
 120                 struct rte_mbuf **bufs,
 121                 uint16_t nb_pkts)
 122 {
 123         unsigned i;
 124         struct pcap_pkthdr header;
 125         const u_char *packet;
 126         struct rte_mbuf *mbuf;
 127         struct pcap_rx_queue *pcap_q = queue;
 128         struct rte_pktmbuf_pool_private *mbp_priv;
 129         uint16_t num_rx = 0;
 130         uint16_t buf_size;
 131
 132         if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0))
 133                 return 0;
 134
 135         /* Reads the given number of packets from the pcap file one by one
 136          * and copies the packet data into a newly allocated mbuf to return.
 137          */
 138         for (i = 0; i < nb_pkts; i++) {
 139                 /* Get the next PCAP packet */
 140                 packet = pcap_next(pcap_q->pcap, &header);
 141                 if (unlikely(packet == NULL))
 142                         break;
 143                 else
 144                         mbuf = rte_pktmbuf_alloc(pcap_q->mb_pool);
 145                 if (unlikely(mbuf == NULL))
 146                         break;
 147
 148                 /* Now get the space available for data in the mbuf */
 149                 mbp_priv =  rte_mempool_get_priv(pcap_q->mb_pool);
 150                 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
 151                                 RTE_PKTMBUF_HEADROOM);
 152
 153                 if (header.len <= buf_size) {
 154                         /* pcap packet will fit in the mbuf, go ahead and copy */
 155                         rte_memcpy(rte_pktmbuf_mtod(mbuf, void *), packet,
 156                                         header.len);
 157                         mbuf->data_len = (uint16_t)header.len;
 158                         mbuf->pkt_len = mbuf->data_len;
 159                         mbuf->port = pcap_q->in_port;
 160                         bufs[num_rx] = mbuf;
 161                         num_rx++;
 162                 } else {
 163                         /* pcap packet will not fit in the mbuf, so drop packet */
 164                         RTE_LOG(ERR, PMD,
 165                                         "PCAP packet %d bytes will not fit in mbuf (%d bytes)\n",
 166                                         header.len, buf_size);
 167                         rte_pktmbuf_free(mbuf);
 168                 }
 169         }
 170         pcap_q->rx_pkts += num_rx;
 171         return num_rx;
 172 }
 173
 174 static inline void
 175 calculate_timestamp(struct timeval *ts) {
 176         uint64_t cycles;
 177         struct timeval cur_time;
 178
 179         cycles = rte_get_timer_cycles() - start_cycles;
 180         cur_time.tv_sec = cycles / hz;
 181         cur_time.tv_usec = (cycles % hz) * 10e6 / hz;
 182         timeradd(&start_time, &cur_time, ts);
 183 }
 184
 185 /*
 186  * Callback to handle writing packets to a pcap file.
 187  */
 188 static uint16_t
 189 eth_pcap_tx_dumper(void *queue,
 190                 struct rte_mbuf **bufs,
 191                 uint16_t nb_pkts)
 192 {
 193         unsigned i;
 194         struct rte_mbuf *mbuf;
 195         struct pcap_tx_queue *dumper_q = queue;
 196         uint16_t num_tx = 0;
 197         struct pcap_pkthdr header;
 198
 199         if (dumper_q->dumper == NULL || nb_pkts == 0)
 200                 return 0;
 201
 202         /* writes the nb_pkts packets to the previously opened pcap file dumper */
 203         for (i = 0; i < nb_pkts; i++) {
 204                 mbuf = bufs[i];
 205                 calculate_timestamp(&header.ts);
 206                 header.len = mbuf->data_len;
 207                 header.caplen = header.len;
 208                 pcap_dump((u_char *)dumper_q->dumper, &header,
 209                                 rte_pktmbuf_mtod(mbuf, void*));
 210                 rte_pktmbuf_free(mbuf);
 211                 num_tx++;
 212         }
 213
 214         /*
 215          * Since there's no place to hook a callback when the forwarding
 216          * process stops and to make sure the pcap file is actually written,
 217          * we flush the pcap dumper within each burst.
 218          */
 219         pcap_dump_flush(dumper_q->dumper);
 220         dumper_q->tx_pkts += num_tx;
 221         dumper_q->err_pkts += nb_pkts - num_tx;
 222         return num_tx;
 223 }
 224
 225 /*
 226  * Callback to handle sending packets through a real NIC.
 227  */
 228 static uint16_t
 229 eth_pcap_tx(void *queue,
 230                 struct rte_mbuf **bufs,
 231                 uint16_t nb_pkts)
 232 {
 233         unsigned i;
 234         int ret;
 235         struct rte_mbuf *mbuf;
 236         struct pcap_tx_queue *tx_queue = queue;
 237         uint16_t num_tx = 0;
 238
 239         if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
 240                 return 0;
 241
 242         for (i = 0; i < nb_pkts; i++) {
 243                 mbuf = bufs[i];
 244                 ret = pcap_sendpacket(tx_queue->pcap,
 245                                 rte_pktmbuf_mtod(mbuf, u_char *),
 246                                 mbuf->data_len);
 247                 if (unlikely(ret != 0))
 248                         break;
 249                 num_tx++;
 250                 rte_pktmbuf_free(mbuf);
 251         }
 252
 253         tx_queue->tx_pkts += num_tx;
 254         tx_queue->err_pkts += nb_pkts - num_tx;
 255         return num_tx;
 256 }
 257
 258 static int
 259 eth_dev_start(struct rte_eth_dev *dev)
 260 {
 261         dev->data->dev_link.link_status = 1;
 262         return 0;
 263 }
 264
 265 /*
 266  * This function gets called when the current port gets stopped.
 267  * Is the only place for us to close all the tx streams dumpers.
 268  * If not called the dumpers will be flushed within each tx burst.
 269  */
 270 static void
 271 eth_dev_stop(struct rte_eth_dev *dev)
 272 {
 273         unsigned i;
 274         pcap_dumper_t *dumper;
 275         pcap_t *pcap;
 276         struct pmd_internals *internals = dev->data->dev_private;
 277
 278         for (i = 0; i < internals->nb_tx_queues; i++) {
 279                 dumper = internals->tx_queue[i].dumper;
 280                 if(dumper != NULL)
 281                         pcap_dump_close(dumper);
 282                 pcap = internals->tx_queue[i].pcap;
 283                 if(pcap != NULL)
 284                         pcap_close(pcap);
 285         }
 286
 287         dev->data->dev_link.link_status = 0;
 288 }
 289
 290 static int
 291 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 292 {
 293         return 0;
 294 }
 295
 296 static void
 297 eth_dev_info(struct rte_eth_dev *dev,
 298                 struct rte_eth_dev_info *dev_info)
 299 {
 300         struct pmd_internals *internals = dev->data->dev_private;
 301         dev_info->driver_name = drivername;
 302         dev_info->if_index = internals->if_index;
 303         dev_info->max_mac_addrs = 1;
 304         dev_info->max_rx_pktlen = (uint32_t) -1;
 305         dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
 306         dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
 307         dev_info->min_rx_bufsize = 0;
 308         dev_info->pci_dev = NULL;
 309 }
 310
 311 static void
 312 eth_stats_get(struct rte_eth_dev *dev,
 313                 struct rte_eth_stats *igb_stats)
 314 {
 315         unsigned i;
 316         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 317         const struct pmd_internals *internal = dev->data->dev_private;
 318
 319         memset(igb_stats, 0, sizeof(*igb_stats));
 320         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_rx_queues;
 321                         i++) {
 322                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 323                 rx_total += igb_stats->q_ipackets[i];
 324         }
 325
 326         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_tx_queues;
 327                         i++) {
 328                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 329                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 330                 tx_total += igb_stats->q_opackets[i];
 331                 tx_err_total += igb_stats->q_errors[i];
 332         }
 333
 334         igb_stats->ipackets = rx_total;
 335         igb_stats->opackets = tx_total;
 336         igb_stats->oerrors = tx_err_total;
 337 }
 338
 339 static void
 340 eth_stats_reset(struct rte_eth_dev *dev)
 341 {
 342         unsigned i;
 343         struct pmd_internals *internal = dev->data->dev_private;
 344         for (i = 0; i < internal->nb_rx_queues; i++)
 345                 internal->rx_queue[i].rx_pkts = 0;
 346         for (i = 0; i < internal->nb_tx_queues; i++) {
 347                 internal->tx_queue[i].tx_pkts = 0;
 348                 internal->tx_queue[i].err_pkts = 0;
 349         }
 350 }
 351
 352 static void
 353 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 354 {
 355 }
 356
 357 static void
 358 eth_queue_release(void *q __rte_unused)
 359 {
 360 }
 361
 362 static int
 363 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 364                 int wait_to_complete __rte_unused)
 365 {
 366         return 0;
 367 }
 368
 369 static int
 370 eth_rx_queue_setup(struct rte_eth_dev *dev,
 371                 uint16_t rx_queue_id,
 372                 uint16_t nb_rx_desc __rte_unused,
 373                 unsigned int socket_id __rte_unused,
 374                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 375                 struct rte_mempool *mb_pool)
 376 {
 377         struct pmd_internals *internals = dev->data->dev_private;
 378         struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id];
 379         pcap_q->mb_pool = mb_pool;
 380         dev->data->rx_queues[rx_queue_id] = pcap_q;
 381         pcap_q->in_port = dev->data->port_id;
 382         return 0;
 383 }
 384
 385 static int
 386 eth_tx_queue_setup(struct rte_eth_dev *dev,
 387                 uint16_t tx_queue_id,
 388                 uint16_t nb_tx_desc __rte_unused,
 389                 unsigned int socket_id __rte_unused,
 390                 const struct rte_eth_txconf *tx_conf __rte_unused)
 391 {
 392
 393         struct pmd_internals *internals = dev->data->dev_private;
 394         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 395         return 0;
 396 }
 397
 398 static struct eth_dev_ops ops = {
 399                 .dev_start = eth_dev_start,
 400                 .dev_stop =     eth_dev_stop,
 401                 .dev_close = eth_dev_close,
 402                 .dev_configure = eth_dev_configure,
 403                 .dev_infos_get = eth_dev_info,
 404                 .rx_queue_setup = eth_rx_queue_setup,
 405                 .tx_queue_setup = eth_tx_queue_setup,
 406                 .rx_queue_release = eth_queue_release,
 407                 .tx_queue_release = eth_queue_release,
 408                 .link_update = eth_link_update,
 409                 .stats_get = eth_stats_get,
 410                 .stats_reset = eth_stats_reset,
 411 };
 412
 413 /*
 414  * Function handler that opens the pcap file for reading a stores a
 415  * reference of it for use it later on.
 416  */
 417 static int
 418 open_rx_pcap(const char *key __rte_unused, const char *value, void *extra_args)
 419 {
 420         unsigned i;
 421         const char *pcap_filename = value;
 422         struct rx_pcaps *pcaps = extra_args;
 423         pcap_t *rx_pcap;
 424
 425         for (i = 0; i < pcaps->num_of_rx; i++) {
 426                 if ((rx_pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) {
 427                         RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf);
 428                         return -1;
 429                 }
 430                 pcaps->pcaps[i] = rx_pcap;
 431         }
 432
 433         return 0;
 434 }
 435
 436 /*
 437  * Opens a pcap file for writing and stores a reference to it
 438  * for use it later on.
 439  */
 440 static int
 441 open_tx_pcap(const char *key __rte_unused, const char *value, void *extra_args)
 442 {
 443         unsigned i;
 444         const char *pcap_filename = value;
 445         struct tx_pcaps *dumpers = extra_args;
 446         pcap_t *tx_pcap;
 447         pcap_dumper_t *dumper;
 448
 449         for (i = 0; i < dumpers->num_of_tx; i++) {
 450                 /*
 451                  * We need to create a dummy empty pcap_t to use it
 452                  * with pcap_dump_open(). We create big enough an Ethernet
 453                  * pcap holder.
 454                  */
 455                 if ((tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN))
 456                                 == NULL) {
 457                         RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
 458                         return -1;
 459                 }
 460
 461                 /* The dumper is created using the previous pcap_t reference */
 462                 if ((dumper = pcap_dump_open(tx_pcap, pcap_filename)) == NULL) {
 463                         RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n", pcap_filename);
 464                         return -1;
 465                 }
 466                 dumpers->dumpers[i] = dumper;
 467         }
 468
 469         return 0;
 470 }
 471
 472 /*
 473  * pcap_open_live wrapper function
 474  */
 475 static inline int
 476 open_iface_live(const char *iface, pcap_t **pcap) {
 477         *pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN,
 478                         RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf);
 479
 480         if (*pcap == NULL) {
 481                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf);
 482                 return -1;
 483         }
 484         return 0;
 485 }
 486
 487 /*
 488  * Opens an interface for reading and writing
 489  */
 490 static inline int
 491 open_rx_tx_iface(const char *key __rte_unused, const char *value, void *extra_args)
 492 {
 493         const char *iface = value;
 494         pcap_t **pcap = extra_args;
 495
 496         if(open_iface_live(iface, pcap) < 0)
 497                 return -1;
 498         return 0;
 499 }
 500
 501 /*
 502  * Opens a NIC for reading packets from it
 503  */
 504 static inline int
 505 open_rx_iface(const char *key __rte_unused, const char *value, void *extra_args)
 506 {
 507         unsigned i;
 508         const char *iface = value;
 509         struct rx_pcaps *pcaps = extra_args;
 510         pcap_t *pcap = NULL;
 511
 512         for (i = 0; i < pcaps->num_of_rx; i++) {
 513                 if(open_iface_live(iface, &pcap) < 0)
 514                         return -1;
 515                 pcaps->pcaps[i] = pcap;
 516         }
 517
 518         return 0;
 519 }
 520
 521 /*
 522  * Opens a NIC for writing packets to it
 523  */
 524 static inline int
 525 open_tx_iface(const char *key __rte_unused, const char *value, void *extra_args)
 526 {
 527         unsigned i;
 528         const char *iface = value;
 529         struct tx_pcaps *pcaps = extra_args;
 530         pcap_t *pcap;
 531
 532         for (i = 0; i < pcaps->num_of_tx; i++) {
 533                 if(open_iface_live(iface, &pcap) < 0)
 534                         return -1;
 535                 pcaps->pcaps[i] = pcap;
 536         }
 537
 538         return 0;
 539 }
 540
 541
 542 static int
 543 rte_pmd_init_internals(const char *name, const unsigned nb_rx_queues,
 544                 const unsigned nb_tx_queues,
 545                 const unsigned numa_node,
 546                 struct pmd_internals **internals,
 547                 struct rte_eth_dev **eth_dev,
 548                 struct rte_kvargs *kvlist)
 549 {
 550         struct rte_eth_dev_data *data = NULL;
 551         struct rte_pci_device *pci_dev = NULL;
 552         unsigned k_idx;
 553         struct rte_kvargs_pair *pair = NULL;
 554
 555         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 556                 pair = &kvlist->pairs[k_idx];
 557                 if (strstr(pair->key, ETH_PCAP_IFACE_ARG) != NULL)
 558                         break;
 559         }
 560
 561         RTE_LOG(INFO, PMD,
 562                         "Creating pcap-backed ethdev on numa socket %u\n", numa_node);
 563
 564         /* now do all data allocation - for eth_dev structure, dummy pci driver
 565          * and internal (private) data
 566          */
 567         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 568         if (data == NULL)
 569                 goto error;
 570
 571         pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
 572         if (pci_dev == NULL)
 573                 goto error;
 574
 575         *internals = rte_zmalloc_socket(name, sizeof(**internals), 0, numa_node);
 576         if (*internals == NULL)
 577                 goto error;
 578
 579         /* reserve an ethdev entry */
 580         *eth_dev = rte_eth_dev_allocate(name);
 581         if (*eth_dev == NULL)
 582                 goto error;
 583
 584         /* now put it all together
 585          * - store queue data in internals,
 586          * - store numa_node info in pci_driver
 587          * - point eth_dev_data to internals and pci_driver
 588          * - and point eth_dev structure to new eth_dev_data structure
 589          */
 590         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 591          * so the rings are local per-process */
 592
 593         (*internals)->nb_rx_queues = nb_rx_queues;
 594         (*internals)->nb_tx_queues = nb_tx_queues;
 595
 596         if (pair == NULL)
 597                 (*internals)->if_index = 0;
 598         else
 599                 (*internals)->if_index = if_nametoindex(pair->value);
 600
 601         pci_dev->numa_node = numa_node;
 602
 603         data->dev_private = *internals;
 604         data->port_id = (*eth_dev)->data->port_id;
 605         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 606         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 607         data->dev_link = pmd_link;
 608         data->mac_addrs = &eth_addr;
 609
 610         (*eth_dev)->data = data;
 611         (*eth_dev)->dev_ops = &ops;
 612         (*eth_dev)->pci_dev = pci_dev;
 613
 614         return 0;
 615
 616         error: if (data)
 617                 rte_free(data);
 618         if (pci_dev)
 619                 rte_free(pci_dev);
 620         if (*internals)
 621                 rte_free(*internals);
 622         return -1;
 623 }
 624
 625 static int
 626 rte_eth_from_pcaps_n_dumpers(const char *name, pcap_t * const rx_queues[],
 627                 const unsigned nb_rx_queues,
 628                 pcap_dumper_t * const tx_queues[],
 629                 const unsigned nb_tx_queues,
 630                 const unsigned numa_node,
 631                 struct rte_kvargs *kvlist)
 632 {
 633         struct pmd_internals *internals = NULL;
 634         struct rte_eth_dev *eth_dev = NULL;
 635         unsigned i;
 636
 637         /* do some parameter checking */
 638         if (rx_queues == NULL && nb_rx_queues > 0)
 639                 return -1;
 640         if (tx_queues == NULL && nb_tx_queues > 0)
 641                 return -1;
 642
 643         if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node,
 644                         &internals, &eth_dev, kvlist) < 0)
 645                 return -1;
 646
 647         for (i = 0; i < nb_rx_queues; i++) {
 648                 internals->rx_queue->pcap = rx_queues[i];
 649         }
 650         for (i = 0; i < nb_tx_queues; i++) {
 651                 internals->tx_queue->dumper = tx_queues[i];
 652         }
 653
 654         eth_dev->rx_pkt_burst = eth_pcap_rx;
 655         eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
 656
 657         return 0;
 658 }
 659
 660 static int
 661 rte_eth_from_pcaps(const char *name, pcap_t * const rx_queues[],
 662                 const unsigned nb_rx_queues,
 663                 pcap_t * const tx_queues[],
 664                 const unsigned nb_tx_queues,
 665                 const unsigned numa_node,
 666                 struct rte_kvargs *kvlist)
 667 {
 668         struct pmd_internals *internals = NULL;
 669         struct rte_eth_dev *eth_dev = NULL;
 670         unsigned i;
 671
 672         /* do some parameter checking */
 673         if (rx_queues == NULL && nb_rx_queues > 0)
 674                 return -1;
 675         if (tx_queues == NULL && nb_tx_queues > 0)
 676                 return -1;
 677
 678         if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node,
 679                         &internals, &eth_dev, kvlist) < 0)
 680                 return -1;
 681
 682         for (i = 0; i < nb_rx_queues; i++) {
 683                 internals->rx_queue->pcap = rx_queues[i];
 684         }
 685         for (i = 0; i < nb_tx_queues; i++) {
 686                 internals->tx_queue->pcap = tx_queues[i];
 687         }
 688
 689         eth_dev->rx_pkt_burst = eth_pcap_rx;
 690         eth_dev->tx_pkt_burst = eth_pcap_tx;
 691
 692         return 0;
 693 }
 694
 695
 696 static int
 697 rte_pmd_pcap_devinit(const char *name, const char *params)
 698 {
 699         unsigned numa_node, using_dumpers = 0;
 700         int ret;
 701         struct rte_kvargs *kvlist;
 702         struct rx_pcaps pcaps;
 703         struct tx_pcaps dumpers;
 704
 705         RTE_LOG(INFO, PMD, "Initializing pmd_pcap for %s\n", name);
 706
 707         numa_node = rte_socket_id();
 708
 709         gettimeofday(&start_time, NULL);
 710         start_cycles = rte_get_timer_cycles();
 711         hz = rte_get_timer_hz();
 712
 713         kvlist = rte_kvargs_parse(params, valid_arguments);
 714         if (kvlist == NULL)
 715                 return -1;
 716
 717         /*
 718          * If iface argument is passed we open the NICs and use them for
 719          * reading / writing
 720          */
 721         if (rte_kvargs_count(kvlist, ETH_PCAP_IFACE_ARG) == 1) {
 722
 723                 ret = rte_kvargs_process(kvlist, ETH_PCAP_IFACE_ARG,
 724                                 &open_rx_tx_iface, &pcaps.pcaps[0]);
 725                 if (ret < 0)
 726                         return -1;
 727
 728                 return rte_eth_from_pcaps(name, pcaps.pcaps, 1, pcaps.pcaps, 1,
 729                                 numa_node, kvlist);
 730         }
 731
 732         /*
 733          * We check whether we want to open a RX stream from a real NIC or a
 734          * pcap file
 735          */
 736         if ((pcaps.num_of_rx = rte_kvargs_count(kvlist, ETH_PCAP_RX_PCAP_ARG))) {
 737                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_PCAP_ARG,
 738                                 &open_rx_pcap, &pcaps);
 739         } else {
 740                 pcaps.num_of_rx = rte_kvargs_count(kvlist,
 741                                 ETH_PCAP_RX_IFACE_ARG);
 742                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_IFACE_ARG,
 743                                 &open_rx_iface, &pcaps);
 744         }
 745
 746         if (ret < 0)
 747                 return -1;
 748
 749         /*
 750          * We check whether we want to open a TX stream to a real NIC or a
 751          * pcap file
 752          */
 753         if ((dumpers.num_of_tx = rte_kvargs_count(kvlist,
 754                         ETH_PCAP_TX_PCAP_ARG))) {
 755                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_PCAP_ARG,
 756                                 &open_tx_pcap, &dumpers);
 757                 using_dumpers = 1;
 758         } else {
 759                 dumpers.num_of_tx = rte_kvargs_count(kvlist,
 760                                 ETH_PCAP_TX_IFACE_ARG);
 761                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_IFACE_ARG,
 762                                 &open_tx_iface, &dumpers);
 763         }
 764
 765         if (ret < 0)
 766                 return -1;
 767
 768         if (using_dumpers)
 769                 return rte_eth_from_pcaps_n_dumpers(name, pcaps.pcaps, pcaps.num_of_rx,
 770                                 dumpers.dumpers, dumpers.num_of_tx, numa_node, kvlist);
 771
 772         return rte_eth_from_pcaps(name, pcaps.pcaps, pcaps.num_of_rx, dumpers.pcaps,
 773                         dumpers.num_of_tx, numa_node, kvlist);
 774
 775 }
 776
 777 static struct rte_driver pmd_pcap_drv = {
 778         .name = "eth_pcap",
 779         .type = PMD_VDEV,
 780         .init = rte_pmd_pcap_devinit,
 781 };
 782
 783 PMD_REGISTER_DRIVER(pmd_pcap_drv);