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         struct rte_mempool *mb_pool;
  67         volatile unsigned long rx_pkts;
  68         volatile unsigned long err_pkts;
  69 };
  70
  71 struct pcap_tx_queue {
  72         pcap_dumper_t *dumper;
  73         pcap_t *pcap;
  74         volatile unsigned long tx_pkts;
  75         volatile unsigned long err_pkts;
  76 };
  77
  78 struct rx_pcaps {
  79         unsigned num_of_rx;
  80         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  81 };
  82
  83 struct tx_pcaps {
  84         unsigned num_of_tx;
  85         pcap_dumper_t *dumpers[RTE_PMD_RING_MAX_TX_RINGS];
  86         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  87 };
  88
  89 struct pmd_internals {
  90         unsigned nb_rx_queues;
  91         unsigned nb_tx_queues;
  92
  93         int if_index;
  94
  95         struct pcap_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
  96         struct pcap_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
  97 };
  98
  99 const char *valid_arguments[] = {
 100         ETH_PCAP_RX_PCAP_ARG,
 101         ETH_PCAP_TX_PCAP_ARG,
 102         ETH_PCAP_RX_IFACE_ARG,
 103         ETH_PCAP_TX_IFACE_ARG,
 104         ETH_PCAP_IFACE_ARG,
 105         NULL
 106 };
 107
 108 static struct ether_addr eth_addr = { .addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 } };
 109 static const char *drivername = "Pcap PMD";
 110 static struct rte_eth_link pmd_link = {
 111                 .link_speed = 10000,
 112                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 113                 .link_status = 0
 114 };
 115
 116
 117 static uint16_t
 118 eth_pcap_rx(void *queue,
 119                 struct rte_mbuf **bufs,
 120                 uint16_t nb_pkts)
 121 {
 122         unsigned i;
 123         struct pcap_pkthdr header;
 124         const u_char *packet;
 125         struct rte_mbuf *mbuf;
 126         struct pcap_rx_queue *pcap_q = queue;
 127         struct rte_pktmbuf_pool_private *mbp_priv;
 128         uint16_t num_rx = 0;
 129         uint16_t buf_size;
 130
 131         if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0))
 132                 return 0;
 133
 134         /* Reads the given number of packets from the pcap file one by one
 135          * and copies the packet data into a newly allocated mbuf to return.
 136          */
 137         for (i = 0; i < nb_pkts; i++) {
 138                 /* Get the next PCAP packet */
 139                 packet = pcap_next(pcap_q->pcap, &header);
 140                 if (unlikely(packet == NULL))
 141                         break;
 142                 else
 143                         mbuf = rte_pktmbuf_alloc(pcap_q->mb_pool);
 144                 if (unlikely(mbuf == NULL))
 145                         break;
 146
 147                 /* Now get the space available for data in the mbuf */
 148                 mbp_priv =  rte_mempool_get_priv(pcap_q->mb_pool);
 149                 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
 150                                 RTE_PKTMBUF_HEADROOM);
 151
 152                 if (header.len <= buf_size) {
 153                         /* pcap packet will fit in the mbuf, go ahead and copy */
 154                         rte_memcpy(rte_pktmbuf_mtod(mbuf, void *), packet,
 155                                         header.len);
 156                         mbuf->data_len = (uint16_t)header.len;
 157                         mbuf->pkt_len = mbuf->data_len;
 158                         bufs[num_rx] = mbuf;
 159                         num_rx++;
 160                 } else {
 161                         /* pcap packet will not fit in the mbuf, so drop packet */
 162                         RTE_LOG(ERR, PMD,
 163                                         "PCAP packet %d bytes will not fit in mbuf (%d bytes)\n",
 164                                         header.len, buf_size);
 165                         rte_pktmbuf_free(mbuf);
 166                 }
 167         }
 168         pcap_q->rx_pkts += num_rx;
 169         return num_rx;
 170 }
 171
 172 static inline void
 173 calculate_timestamp(struct timeval *ts) {
 174         uint64_t cycles;
 175         struct timeval cur_time;
 176
 177         cycles = rte_get_timer_cycles() - start_cycles;
 178         cur_time.tv_sec = cycles / hz;
 179         cur_time.tv_usec = (cycles % hz) * 10e6 / hz;
 180         timeradd(&start_time, &cur_time, ts);
 181 }
 182
 183 /*
 184  * Callback to handle writing packets to a pcap file.
 185  */
 186 static uint16_t
 187 eth_pcap_tx_dumper(void *queue,
 188                 struct rte_mbuf **bufs,
 189                 uint16_t nb_pkts)
 190 {
 191         unsigned i;
 192         struct rte_mbuf *mbuf;
 193         struct pcap_tx_queue *dumper_q = queue;
 194         uint16_t num_tx = 0;
 195         struct pcap_pkthdr header;
 196
 197         if (dumper_q->dumper == NULL || nb_pkts == 0)
 198                 return 0;
 199
 200         /* writes the nb_pkts packets to the previously opened pcap file dumper */
 201         for (i = 0; i < nb_pkts; i++) {
 202                 mbuf = bufs[i];
 203                 calculate_timestamp(&header.ts);
 204                 header.len = mbuf->data_len;
 205                 header.caplen = header.len;
 206                 pcap_dump((u_char *)dumper_q->dumper, &header,
 207                                 rte_pktmbuf_mtod(mbuf, void*));
 208                 rte_pktmbuf_free(mbuf);
 209                 num_tx++;
 210         }
 211
 212         /*
 213          * Since there's no place to hook a callback when the forwarding
 214          * process stops and to make sure the pcap file is actually written,
 215          * we flush the pcap dumper within each burst.
 216          */
 217         pcap_dump_flush(dumper_q->dumper);
 218         dumper_q->tx_pkts += num_tx;
 219         dumper_q->err_pkts += nb_pkts - num_tx;
 220         return num_tx;
 221 }
 222
 223 /*
 224  * Callback to handle sending packets through a real NIC.
 225  */
 226 static uint16_t
 227 eth_pcap_tx(void *queue,
 228                 struct rte_mbuf **bufs,
 229                 uint16_t nb_pkts)
 230 {
 231         unsigned i;
 232         int ret;
 233         struct rte_mbuf *mbuf;
 234         struct pcap_tx_queue *tx_queue = queue;
 235         uint16_t num_tx = 0;
 236
 237         if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
 238                 return 0;
 239
 240         for (i = 0; i < nb_pkts; i++) {
 241                 mbuf = bufs[i];
 242                 ret = pcap_sendpacket(tx_queue->pcap,
 243                                 rte_pktmbuf_mtod(mbuf, u_char *),
 244                                 mbuf->data_len);
 245                 if (unlikely(ret != 0))
 246                         break;
 247                 num_tx++;
 248                 rte_pktmbuf_free(mbuf);
 249         }
 250
 251         tx_queue->tx_pkts += num_tx;
 252         tx_queue->err_pkts += nb_pkts - num_tx;
 253         return num_tx;
 254 }
 255
 256 static int
 257 eth_dev_start(struct rte_eth_dev *dev)
 258 {
 259         dev->data->dev_link.link_status = 1;
 260         return 0;
 261 }
 262
 263 /*
 264  * This function gets called when the current port gets stopped.
 265  * Is the only place for us to close all the tx streams dumpers.
 266  * If not called the dumpers will be flushed within each tx burst.
 267  */
 268 static void
 269 eth_dev_stop(struct rte_eth_dev *dev)
 270 {
 271         unsigned i;
 272         pcap_dumper_t *dumper;
 273         pcap_t *pcap;
 274         struct pmd_internals *internals = dev->data->dev_private;
 275
 276         for (i = 0; i < internals->nb_tx_queues; i++) {
 277                 dumper = internals->tx_queue[i].dumper;
 278                 if(dumper != NULL)
 279                         pcap_dump_close(dumper);
 280                 pcap = internals->tx_queue[i].pcap;
 281                 if(pcap != NULL)
 282                         pcap_close(pcap);
 283         }
 284
 285         dev->data->dev_link.link_status = 0;
 286 }
 287
 288 static int
 289 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 290 {
 291         return 0;
 292 }
 293
 294 static void
 295 eth_dev_info(struct rte_eth_dev *dev,
 296                 struct rte_eth_dev_info *dev_info)
 297 {
 298         struct pmd_internals *internals = dev->data->dev_private;
 299         dev_info->driver_name = drivername;
 300         dev_info->if_index = internals->if_index;
 301         dev_info->max_mac_addrs = 1;
 302         dev_info->max_rx_pktlen = (uint32_t) -1;
 303         dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
 304         dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
 305         dev_info->min_rx_bufsize = 0;
 306         dev_info->pci_dev = NULL;
 307 }
 308
 309 static void
 310 eth_stats_get(struct rte_eth_dev *dev,
 311                 struct rte_eth_stats *igb_stats)
 312 {
 313         unsigned i;
 314         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 315         const struct pmd_internals *internal = dev->data->dev_private;
 316
 317         memset(igb_stats, 0, sizeof(*igb_stats));
 318         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_rx_queues;
 319                         i++) {
 320                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 321                 rx_total += igb_stats->q_ipackets[i];
 322         }
 323
 324         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_tx_queues;
 325                         i++) {
 326                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 327                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 328                 tx_total += igb_stats->q_opackets[i];
 329                 tx_err_total += igb_stats->q_errors[i];
 330         }
 331
 332         igb_stats->ipackets = rx_total;
 333         igb_stats->opackets = tx_total;
 334         igb_stats->oerrors = tx_err_total;
 335 }
 336
 337 static void
 338 eth_stats_reset(struct rte_eth_dev *dev)
 339 {
 340         unsigned i;
 341         struct pmd_internals *internal = dev->data->dev_private;
 342         for (i = 0; i < internal->nb_rx_queues; i++)
 343                 internal->rx_queue[i].rx_pkts = 0;
 344         for (i = 0; i < internal->nb_tx_queues; i++) {
 345                 internal->tx_queue[i].tx_pkts = 0;
 346                 internal->tx_queue[i].err_pkts = 0;
 347         }
 348 }
 349
 350 static void
 351 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 352 {
 353 }
 354
 355 static void
 356 eth_queue_release(void *q __rte_unused)
 357 {
 358 }
 359
 360 static int
 361 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 362                 int wait_to_complete __rte_unused)
 363 {
 364         return 0;
 365 }
 366
 367 static int
 368 eth_rx_queue_setup(struct rte_eth_dev *dev,
 369                 uint16_t rx_queue_id,
 370                 uint16_t nb_rx_desc __rte_unused,
 371                 unsigned int socket_id __rte_unused,
 372                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 373                 struct rte_mempool *mb_pool)
 374 {
 375         struct pmd_internals *internals = dev->data->dev_private;
 376         struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id];
 377         pcap_q->mb_pool = mb_pool;
 378         dev->data->rx_queues[rx_queue_id] = pcap_q;
 379         return 0;
 380 }
 381
 382 static int
 383 eth_tx_queue_setup(struct rte_eth_dev *dev,
 384                 uint16_t tx_queue_id,
 385                 uint16_t nb_tx_desc __rte_unused,
 386                 unsigned int socket_id __rte_unused,
 387                 const struct rte_eth_txconf *tx_conf __rte_unused)
 388 {
 389
 390         struct pmd_internals *internals = dev->data->dev_private;
 391         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 392         return 0;
 393 }
 394
 395 static struct eth_dev_ops ops = {
 396                 .dev_start = eth_dev_start,
 397                 .dev_stop =     eth_dev_stop,
 398                 .dev_close = eth_dev_close,
 399                 .dev_configure = eth_dev_configure,
 400                 .dev_infos_get = eth_dev_info,
 401                 .rx_queue_setup = eth_rx_queue_setup,
 402                 .tx_queue_setup = eth_tx_queue_setup,
 403                 .rx_queue_release = eth_queue_release,
 404                 .tx_queue_release = eth_queue_release,
 405                 .link_update = eth_link_update,
 406                 .stats_get = eth_stats_get,
 407                 .stats_reset = eth_stats_reset,
 408 };
 409
 410 /*
 411  * Function handler that opens the pcap file for reading a stores a
 412  * reference of it for use it later on.
 413  */
 414 static int
 415 open_rx_pcap(const char *key __rte_unused, const char *value, void *extra_args)
 416 {
 417         unsigned i;
 418         const char *pcap_filename = value;
 419         struct rx_pcaps *pcaps = extra_args;
 420         pcap_t *rx_pcap;
 421
 422         for (i = 0; i < pcaps->num_of_rx; i++) {
 423                 if ((rx_pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) {
 424                         RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf);
 425                         return -1;
 426                 }
 427                 pcaps->pcaps[i] = rx_pcap;
 428         }
 429
 430         return 0;
 431 }
 432
 433 /*
 434  * Opens a pcap file for writing and stores a reference to it
 435  * for use it later on.
 436  */
 437 static int
 438 open_tx_pcap(const char *key __rte_unused, const char *value, void *extra_args)
 439 {
 440         unsigned i;
 441         const char *pcap_filename = value;
 442         struct tx_pcaps *dumpers = extra_args;
 443         pcap_t *tx_pcap;
 444         pcap_dumper_t *dumper;
 445
 446         for (i = 0; i < dumpers->num_of_tx; i++) {
 447                 /*
 448                  * We need to create a dummy empty pcap_t to use it
 449                  * with pcap_dump_open(). We create big enough an Ethernet
 450                  * pcap holder.
 451                  */
 452                 if ((tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN))
 453                                 == NULL) {
 454                         RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
 455                         return -1;
 456                 }
 457
 458                 /* The dumper is created using the previous pcap_t reference */
 459                 if ((dumper = pcap_dump_open(tx_pcap, pcap_filename)) == NULL) {
 460                         RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n", pcap_filename);
 461                         return -1;
 462                 }
 463                 dumpers->dumpers[i] = dumper;
 464         }
 465
 466         return 0;
 467 }
 468
 469 /*
 470  * pcap_open_live wrapper function
 471  */
 472 static inline int
 473 open_iface_live(const char *iface, pcap_t **pcap) {
 474         *pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN,
 475                         RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf);
 476
 477         if (*pcap == NULL) {
 478                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf);
 479                 return -1;
 480         }
 481         return 0;
 482 }
 483
 484 /*
 485  * Opens an interface for reading and writing
 486  */
 487 static inline int
 488 open_rx_tx_iface(const char *key __rte_unused, const char *value, void *extra_args)
 489 {
 490         const char *iface = value;
 491         pcap_t **pcap = extra_args;
 492
 493         if(open_iface_live(iface, pcap) < 0)
 494                 return -1;
 495         return 0;
 496 }
 497
 498 /*
 499  * Opens a NIC for reading packets from it
 500  */
 501 static inline int
 502 open_rx_iface(const char *key __rte_unused, const char *value, void *extra_args)
 503 {
 504         unsigned i;
 505         const char *iface = value;
 506         struct rx_pcaps *pcaps = extra_args;
 507         pcap_t *pcap = NULL;
 508
 509         for (i = 0; i < pcaps->num_of_rx; i++) {
 510                 if(open_iface_live(iface, &pcap) < 0)
 511                         return -1;
 512                 pcaps->pcaps[i] = pcap;
 513         }
 514
 515         return 0;
 516 }
 517
 518 /*
 519  * Opens a NIC for writing packets to it
 520  */
 521 static inline int
 522 open_tx_iface(const char *key __rte_unused, const char *value, void *extra_args)
 523 {
 524         unsigned i;
 525         const char *iface = value;
 526         struct tx_pcaps *pcaps = extra_args;
 527         pcap_t *pcap;
 528
 529         for (i = 0; i < pcaps->num_of_tx; i++) {
 530                 if(open_iface_live(iface, &pcap) < 0)
 531                         return -1;
 532                 pcaps->pcaps[i] = pcap;
 533         }
 534
 535         return 0;
 536 }
 537
 538
 539 static int
 540 rte_pmd_init_internals(const char *name, const unsigned nb_rx_queues,
 541                 const unsigned nb_tx_queues,
 542                 const unsigned numa_node,
 543                 struct pmd_internals **internals,
 544                 struct rte_eth_dev **eth_dev,
 545                 struct rte_kvargs *kvlist)
 546 {
 547         struct rte_eth_dev_data *data = NULL;
 548         struct rte_pci_device *pci_dev = NULL;
 549         unsigned k_idx;
 550         struct rte_kvargs_pair *pair = NULL;
 551
 552         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 553                 pair = &kvlist->pairs[k_idx];
 554                 if (strstr(pair->key, ETH_PCAP_IFACE_ARG) != NULL)
 555                         break;
 556         }
 557
 558         RTE_LOG(INFO, PMD,
 559                         "Creating pcap-backed ethdev on numa socket %u\n", numa_node);
 560
 561         /* now do all data allocation - for eth_dev structure, dummy pci driver
 562          * and internal (private) data
 563          */
 564         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 565         if (data == NULL)
 566                 goto error;
 567
 568         pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
 569         if (pci_dev == NULL)
 570                 goto error;
 571
 572         *internals = rte_zmalloc_socket(name, sizeof(**internals), 0, numa_node);
 573         if (*internals == NULL)
 574                 goto error;
 575
 576         /* reserve an ethdev entry */
 577         *eth_dev = rte_eth_dev_allocate(name);
 578         if (*eth_dev == NULL)
 579                 goto error;
 580
 581         /* now put it all together
 582          * - store queue data in internals,
 583          * - store numa_node info in pci_driver
 584          * - point eth_dev_data to internals and pci_driver
 585          * - and point eth_dev structure to new eth_dev_data structure
 586          */
 587         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 588          * so the rings are local per-process */
 589
 590         (*internals)->nb_rx_queues = nb_rx_queues;
 591         (*internals)->nb_tx_queues = nb_tx_queues;
 592
 593         if (pair == NULL)
 594                 (*internals)->if_index = 0;
 595         else
 596                 (*internals)->if_index = if_nametoindex(pair->value);
 597
 598         pci_dev->numa_node = numa_node;
 599
 600         data->dev_private = *internals;
 601         data->port_id = (*eth_dev)->data->port_id;
 602         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 603         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 604         data->dev_link = pmd_link;
 605         data->mac_addrs = &eth_addr;
 606
 607         (*eth_dev)->data = data;
 608         (*eth_dev)->dev_ops = &ops;
 609         (*eth_dev)->pci_dev = pci_dev;
 610
 611         return 0;
 612
 613         error: if (data)
 614                 rte_free(data);
 615         if (pci_dev)
 616                 rte_free(pci_dev);
 617         if (*internals)
 618                 rte_free(*internals);
 619         return -1;
 620 }
 621
 622 static int
 623 rte_eth_from_pcaps_n_dumpers(const char *name, pcap_t * const rx_queues[],
 624                 const unsigned nb_rx_queues,
 625                 pcap_dumper_t * const tx_queues[],
 626                 const unsigned nb_tx_queues,
 627                 const unsigned numa_node,
 628                 struct rte_kvargs *kvlist)
 629 {
 630         struct pmd_internals *internals = NULL;
 631         struct rte_eth_dev *eth_dev = NULL;
 632         unsigned i;
 633
 634         /* do some parameter checking */
 635         if (rx_queues == NULL && nb_rx_queues > 0)
 636                 return -1;
 637         if (tx_queues == NULL && nb_tx_queues > 0)
 638                 return -1;
 639
 640         if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node,
 641                         &internals, &eth_dev, kvlist) < 0)
 642                 return -1;
 643
 644         for (i = 0; i < nb_rx_queues; i++) {
 645                 internals->rx_queue->pcap = rx_queues[i];
 646         }
 647         for (i = 0; i < nb_tx_queues; i++) {
 648                 internals->tx_queue->dumper = tx_queues[i];
 649         }
 650
 651         eth_dev->rx_pkt_burst = eth_pcap_rx;
 652         eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
 653
 654         return 0;
 655 }
 656
 657 static int
 658 rte_eth_from_pcaps(const char *name, pcap_t * const rx_queues[],
 659                 const unsigned nb_rx_queues,
 660                 pcap_t * const tx_queues[],
 661                 const unsigned nb_tx_queues,
 662                 const unsigned numa_node,
 663                 struct rte_kvargs *kvlist)
 664 {
 665         struct pmd_internals *internals = NULL;
 666         struct rte_eth_dev *eth_dev = NULL;
 667         unsigned i;
 668
 669         /* do some parameter checking */
 670         if (rx_queues == NULL && nb_rx_queues > 0)
 671                 return -1;
 672         if (tx_queues == NULL && nb_tx_queues > 0)
 673                 return -1;
 674
 675         if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node,
 676                         &internals, &eth_dev, kvlist) < 0)
 677                 return -1;
 678
 679         for (i = 0; i < nb_rx_queues; i++) {
 680                 internals->rx_queue->pcap = rx_queues[i];
 681         }
 682         for (i = 0; i < nb_tx_queues; i++) {
 683                 internals->tx_queue->pcap = tx_queues[i];
 684         }
 685
 686         eth_dev->rx_pkt_burst = eth_pcap_rx;
 687         eth_dev->tx_pkt_burst = eth_pcap_tx;
 688
 689         return 0;
 690 }
 691
 692
 693 static int
 694 rte_pmd_pcap_devinit(const char *name, const char *params)
 695 {
 696         unsigned numa_node, using_dumpers = 0;
 697         int ret;
 698         struct rte_kvargs *kvlist;
 699         struct rx_pcaps pcaps;
 700         struct tx_pcaps dumpers;
 701
 702         RTE_LOG(INFO, PMD, "Initializing pmd_pcap for %s\n", name);
 703
 704         numa_node = rte_socket_id();
 705
 706         gettimeofday(&start_time, NULL);
 707         start_cycles = rte_get_timer_cycles();
 708         hz = rte_get_timer_hz();
 709
 710         kvlist = rte_kvargs_parse(params, valid_arguments);
 711         if (kvlist == NULL)
 712                 return -1;
 713
 714         /*
 715          * If iface argument is passed we open the NICs and use them for
 716          * reading / writing
 717          */
 718         if (rte_kvargs_count(kvlist, ETH_PCAP_IFACE_ARG) == 1) {
 719
 720                 ret = rte_kvargs_process(kvlist, ETH_PCAP_IFACE_ARG,
 721                                 &open_rx_tx_iface, &pcaps.pcaps[0]);
 722                 if (ret < 0)
 723                         return -1;
 724
 725                 return rte_eth_from_pcaps(name, pcaps.pcaps, 1, pcaps.pcaps, 1,
 726                                 numa_node, kvlist);
 727         }
 728
 729         /*
 730          * We check whether we want to open a RX stream from a real NIC or a
 731          * pcap file
 732          */
 733         if ((pcaps.num_of_rx = rte_kvargs_count(kvlist, ETH_PCAP_RX_PCAP_ARG))) {
 734                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_PCAP_ARG,
 735                                 &open_rx_pcap, &pcaps);
 736         } else {
 737                 pcaps.num_of_rx = rte_kvargs_count(kvlist,
 738                                 ETH_PCAP_RX_IFACE_ARG);
 739                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_IFACE_ARG,
 740                                 &open_rx_iface, &pcaps);
 741         }
 742
 743         if (ret < 0)
 744                 return -1;
 745
 746         /*
 747          * We check whether we want to open a TX stream to a real NIC or a
 748          * pcap file
 749          */
 750         if ((dumpers.num_of_tx = rte_kvargs_count(kvlist,
 751                         ETH_PCAP_TX_PCAP_ARG))) {
 752                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_PCAP_ARG,
 753                                 &open_tx_pcap, &dumpers);
 754                 using_dumpers = 1;
 755         } else {
 756                 dumpers.num_of_tx = rte_kvargs_count(kvlist,
 757                                 ETH_PCAP_TX_IFACE_ARG);
 758                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_IFACE_ARG,
 759                                 &open_tx_iface, &dumpers);
 760         }
 761
 762         if (ret < 0)
 763                 return -1;
 764
 765         if (using_dumpers)
 766                 return rte_eth_from_pcaps_n_dumpers(name, pcaps.pcaps, pcaps.num_of_rx,
 767                                 dumpers.dumpers, dumpers.num_of_tx, numa_node, kvlist);
 768
 769         return rte_eth_from_pcaps(name, pcaps.pcaps, pcaps.num_of_rx, dumpers.pcaps,
 770                         dumpers.num_of_tx, numa_node, kvlist);
 771
 772 }
 773
 774 static struct rte_driver pmd_pcap_drv = {
 775         .name = "eth_pcap",
 776         .type = PMD_VDEV,
 777         .init = rte_pmd_pcap_devinit,
 778 };
 779
 780 PMD_REGISTER_DRIVER(pmd_pcap_drv);