drivers/net/pcap/rte_eth_pcap.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 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
  37 #include <net/if.h>
  38
  39 #include <pcap.h>
  40
  41 #include <rte_cycles.h>
  42 #include <rte_ethdev.h>
  43 #include <rte_ethdev_vdev.h>
  44 #include <rte_kvargs.h>
  45 #include <rte_malloc.h>
  46 #include <rte_mbuf.h>
  47 #include <rte_bus_vdev.h>
  48
  49 #define RTE_ETH_PCAP_SNAPSHOT_LEN 65535
  50 #define RTE_ETH_PCAP_SNAPLEN ETHER_MAX_JUMBO_FRAME_LEN
  51 #define RTE_ETH_PCAP_PROMISC 1
  52 #define RTE_ETH_PCAP_TIMEOUT -1
  53
  54 #define ETH_PCAP_RX_PCAP_ARG  "rx_pcap"
  55 #define ETH_PCAP_TX_PCAP_ARG  "tx_pcap"
  56 #define ETH_PCAP_RX_IFACE_ARG "rx_iface"
  57 #define ETH_PCAP_TX_IFACE_ARG "tx_iface"
  58 #define ETH_PCAP_IFACE_ARG    "iface"
  59
  60 #define ETH_PCAP_ARG_MAXLEN     64
  61
  62 #define RTE_PMD_PCAP_MAX_QUEUES 16
  63
  64 static char errbuf[PCAP_ERRBUF_SIZE];
  65 static unsigned char tx_pcap_data[RTE_ETH_PCAP_SNAPLEN];
  66 static struct timeval start_time;
  67 static uint64_t start_cycles;
  68 static uint64_t hz;
  69
  70 struct queue_stat {
  71         volatile unsigned long pkts;
  72         volatile unsigned long bytes;
  73         volatile unsigned long err_pkts;
  74 };
  75
  76 struct pcap_rx_queue {
  77         pcap_t *pcap;
  78         uint16_t in_port;
  79         struct rte_mempool *mb_pool;
  80         struct queue_stat rx_stat;
  81         char name[PATH_MAX];
  82         char type[ETH_PCAP_ARG_MAXLEN];
  83 };
  84
  85 struct pcap_tx_queue {
  86         pcap_dumper_t *dumper;
  87         pcap_t *pcap;
  88         struct queue_stat tx_stat;
  89         char name[PATH_MAX];
  90         char type[ETH_PCAP_ARG_MAXLEN];
  91 };
  92
  93 struct pmd_internals {
  94         struct pcap_rx_queue rx_queue[RTE_PMD_PCAP_MAX_QUEUES];
  95         struct pcap_tx_queue tx_queue[RTE_PMD_PCAP_MAX_QUEUES];
  96         int if_index;
  97         int single_iface;
  98 };
  99
 100 struct pmd_devargs {
 101         unsigned int num_of_queue;
 102         struct devargs_queue {
 103                 pcap_dumper_t *dumper;
 104                 pcap_t *pcap;
 105                 const char *name;
 106                 const char *type;
 107         } queue[RTE_PMD_PCAP_MAX_QUEUES];
 108 };
 109
 110 static const char *valid_arguments[] = {
 111         ETH_PCAP_RX_PCAP_ARG,
 112         ETH_PCAP_TX_PCAP_ARG,
 113         ETH_PCAP_RX_IFACE_ARG,
 114         ETH_PCAP_TX_IFACE_ARG,
 115         ETH_PCAP_IFACE_ARG,
 116         NULL
 117 };
 118
 119 static struct ether_addr eth_addr = {
 120         .addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 }
 121 };
 122
 123 static struct rte_eth_link pmd_link = {
 124                 .link_speed = ETH_SPEED_NUM_10G,
 125                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 126                 .link_status = ETH_LINK_DOWN,
 127                 .link_autoneg = ETH_LINK_FIXED,
 128 };
 129
 130 static int
 131 eth_pcap_rx_jumbo(struct rte_mempool *mb_pool, struct rte_mbuf *mbuf,
 132                 const u_char *data, uint16_t data_len)
 133 {
 134         /* Copy the first segment. */
 135         uint16_t len = rte_pktmbuf_tailroom(mbuf);
 136         struct rte_mbuf *m = mbuf;
 137
 138         rte_memcpy(rte_pktmbuf_append(mbuf, len), data, len);
 139         data_len -= len;
 140         data += len;
 141
 142         while (data_len > 0) {
 143                 /* Allocate next mbuf and point to that. */
 144                 m->next = rte_pktmbuf_alloc(mb_pool);
 145
 146                 if (unlikely(!m->next))
 147                         return -1;
 148
 149                 m = m->next;
 150
 151                 /* Headroom is not needed in chained mbufs. */
 152                 rte_pktmbuf_prepend(m, rte_pktmbuf_headroom(m));
 153                 m->pkt_len = 0;
 154                 m->data_len = 0;
 155
 156                 /* Copy next segment. */
 157                 len = RTE_MIN(rte_pktmbuf_tailroom(m), data_len);
 158                 rte_memcpy(rte_pktmbuf_append(m, len), data, len);
 159
 160                 mbuf->nb_segs++;
 161                 data_len -= len;
 162                 data += len;
 163         }
 164
 165         return mbuf->nb_segs;
 166 }
 167
 168 /* Copy data from mbuf chain to a buffer suitable for writing to a PCAP file. */
 169 static void
 170 eth_pcap_gather_data(unsigned char *data, struct rte_mbuf *mbuf)
 171 {
 172         uint16_t data_len = 0;
 173
 174         while (mbuf) {
 175                 rte_memcpy(data + data_len, rte_pktmbuf_mtod(mbuf, void *),
 176                         mbuf->data_len);
 177
 178                 data_len += mbuf->data_len;
 179                 mbuf = mbuf->next;
 180         }
 181 }
 182
 183 static uint16_t
 184 eth_pcap_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 185 {
 186         unsigned int i;
 187         struct pcap_pkthdr header;
 188         const u_char *packet;
 189         struct rte_mbuf *mbuf;
 190         struct pcap_rx_queue *pcap_q = queue;
 191         uint16_t num_rx = 0;
 192         uint16_t buf_size;
 193         uint32_t rx_bytes = 0;
 194
 195         if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0))
 196                 return 0;
 197
 198         /* Reads the given number of packets from the pcap file one by one
 199          * and copies the packet data into a newly allocated mbuf to return.
 200          */
 201         for (i = 0; i < nb_pkts; i++) {
 202                 /* Get the next PCAP packet */
 203                 packet = pcap_next(pcap_q->pcap, &header);
 204                 if (unlikely(packet == NULL))
 205                         break;
 206
 207                 mbuf = rte_pktmbuf_alloc(pcap_q->mb_pool);
 208                 if (unlikely(mbuf == NULL))
 209                         break;
 210
 211                 /* Now get the space available for data in the mbuf */
 212                 buf_size = rte_pktmbuf_data_room_size(pcap_q->mb_pool) -
 213                                 RTE_PKTMBUF_HEADROOM;
 214
 215                 if (header.caplen <= buf_size) {
 216                         /* pcap packet will fit in the mbuf, can copy it */
 217                         rte_memcpy(rte_pktmbuf_mtod(mbuf, void *), packet,
 218                                         header.caplen);
 219                         mbuf->data_len = (uint16_t)header.caplen;
 220                 } else {
 221                         /* Try read jumbo frame into multi mbufs. */
 222                         if (unlikely(eth_pcap_rx_jumbo(pcap_q->mb_pool,
 223                                                        mbuf,
 224                                                        packet,
 225                                                        header.caplen) == -1)) {
 226                                 rte_pktmbuf_free(mbuf);
 227                                 break;
 228                         }
 229                 }
 230
 231                 mbuf->pkt_len = (uint16_t)header.caplen;
 232                 mbuf->port = pcap_q->in_port;
 233                 bufs[num_rx] = mbuf;
 234                 num_rx++;
 235                 rx_bytes += header.caplen;
 236         }
 237         pcap_q->rx_stat.pkts += num_rx;
 238         pcap_q->rx_stat.bytes += rx_bytes;
 239
 240         return num_rx;
 241 }
 242
 243 static inline void
 244 calculate_timestamp(struct timeval *ts) {
 245         uint64_t cycles;
 246         struct timeval cur_time;
 247
 248         cycles = rte_get_timer_cycles() - start_cycles;
 249         cur_time.tv_sec = cycles / hz;
 250         cur_time.tv_usec = (cycles % hz) * 1e6 / hz;
 251         timeradd(&start_time, &cur_time, ts);
 252 }
 253
 254 /*
 255  * Callback to handle writing packets to a pcap file.
 256  */
 257 static uint16_t
 258 eth_pcap_tx_dumper(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 259 {
 260         unsigned int i;
 261         struct rte_mbuf *mbuf;
 262         struct pcap_tx_queue *dumper_q = queue;
 263         uint16_t num_tx = 0;
 264         uint32_t tx_bytes = 0;
 265         struct pcap_pkthdr header;
 266
 267         if (dumper_q->dumper == NULL || nb_pkts == 0)
 268                 return 0;
 269
 270         /* writes the nb_pkts packets to the previously opened pcap file
 271          * dumper */
 272         for (i = 0; i < nb_pkts; i++) {
 273                 mbuf = bufs[i];
 274                 calculate_timestamp(&header.ts);
 275                 header.len = mbuf->pkt_len;
 276                 header.caplen = header.len;
 277
 278                 if (likely(mbuf->nb_segs == 1)) {
 279                         pcap_dump((u_char *)dumper_q->dumper, &header,
 280                                   rte_pktmbuf_mtod(mbuf, void*));
 281                 } else {
 282                         if (mbuf->pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN) {
 283                                 eth_pcap_gather_data(tx_pcap_data, mbuf);
 284                                 pcap_dump((u_char *)dumper_q->dumper, &header,
 285                                           tx_pcap_data);
 286                         } else {
 287                                 RTE_LOG(ERR, PMD,
 288                                         "Dropping PCAP packet. Size (%d) > max jumbo size (%d).\n",
 289                                         mbuf->pkt_len,
 290                                         ETHER_MAX_JUMBO_FRAME_LEN);
 291
 292                                 rte_pktmbuf_free(mbuf);
 293                                 break;
 294                         }
 295                 }
 296
 297                 num_tx++;
 298                 tx_bytes += mbuf->pkt_len;
 299                 rte_pktmbuf_free(mbuf);
 300         }
 301
 302         /*
 303          * Since there's no place to hook a callback when the forwarding
 304          * process stops and to make sure the pcap file is actually written,
 305          * we flush the pcap dumper within each burst.
 306          */
 307         pcap_dump_flush(dumper_q->dumper);
 308         dumper_q->tx_stat.pkts += num_tx;
 309         dumper_q->tx_stat.bytes += tx_bytes;
 310         dumper_q->tx_stat.err_pkts += nb_pkts - num_tx;
 311
 312         return num_tx;
 313 }
 314
 315 /*
 316  * Callback to handle sending packets through a real NIC.
 317  */
 318 static uint16_t
 319 eth_pcap_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 320 {
 321         unsigned int i;
 322         int ret;
 323         struct rte_mbuf *mbuf;
 324         struct pcap_tx_queue *tx_queue = queue;
 325         uint16_t num_tx = 0;
 326         uint32_t tx_bytes = 0;
 327
 328         if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
 329                 return 0;
 330
 331         for (i = 0; i < nb_pkts; i++) {
 332                 mbuf = bufs[i];
 333
 334                 if (likely(mbuf->nb_segs == 1)) {
 335                         ret = pcap_sendpacket(tx_queue->pcap,
 336                                         rte_pktmbuf_mtod(mbuf, u_char *),
 337                                         mbuf->pkt_len);
 338                 } else {
 339                         if (mbuf->pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN) {
 340                                 eth_pcap_gather_data(tx_pcap_data, mbuf);
 341                                 ret = pcap_sendpacket(tx_queue->pcap,
 342                                                 tx_pcap_data, mbuf->pkt_len);
 343                         } else {
 344                                 RTE_LOG(ERR, PMD,
 345                                         "Dropping PCAP packet. Size (%d) > max jumbo size (%d).\n",
 346                                         mbuf->pkt_len,
 347                                         ETHER_MAX_JUMBO_FRAME_LEN);
 348
 349                                 rte_pktmbuf_free(mbuf);
 350                                 break;
 351                         }
 352                 }
 353
 354                 if (unlikely(ret != 0))
 355                         break;
 356                 num_tx++;
 357                 tx_bytes += mbuf->pkt_len;
 358                 rte_pktmbuf_free(mbuf);
 359         }
 360
 361         tx_queue->tx_stat.pkts += num_tx;
 362         tx_queue->tx_stat.bytes += tx_bytes;
 363         tx_queue->tx_stat.err_pkts += nb_pkts - num_tx;
 364
 365         return num_tx;
 366 }
 367
 368 /*
 369  * pcap_open_live wrapper function
 370  */
 371 static inline int
 372 open_iface_live(const char *iface, pcap_t **pcap) {
 373         *pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN,
 374                         RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf);
 375
 376         if (*pcap == NULL) {
 377                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf);
 378                 return -1;
 379         }
 380
 381         return 0;
 382 }
 383
 384 static int
 385 open_single_iface(const char *iface, pcap_t **pcap)
 386 {
 387         if (open_iface_live(iface, pcap) < 0) {
 388                 RTE_LOG(ERR, PMD, "Couldn't open interface %s\n", iface);
 389                 return -1;
 390         }
 391
 392         return 0;
 393 }
 394
 395 static int
 396 open_single_tx_pcap(const char *pcap_filename, pcap_dumper_t **dumper)
 397 {
 398         pcap_t *tx_pcap;
 399
 400         /*
 401          * We need to create a dummy empty pcap_t to use it
 402          * with pcap_dump_open(). We create big enough an Ethernet
 403          * pcap holder.
 404          */
 405         tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN);
 406         if (tx_pcap == NULL) {
 407                 RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
 408                 return -1;
 409         }
 410
 411         /* The dumper is created using the previous pcap_t reference */
 412         *dumper = pcap_dump_open(tx_pcap, pcap_filename);
 413         if (*dumper == NULL) {
 414                 pcap_close(tx_pcap);
 415                 RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n",
 416                         pcap_filename);
 417                 return -1;
 418         }
 419
 420         pcap_close(tx_pcap);
 421         return 0;
 422 }
 423
 424 static int
 425 open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap)
 426 {
 427         *pcap = pcap_open_offline(pcap_filename, errbuf);
 428         if (*pcap == NULL) {
 429                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename,
 430                         errbuf);
 431                 return -1;
 432         }
 433
 434         return 0;
 435 }
 436
 437 static int
 438 eth_dev_start(struct rte_eth_dev *dev)
 439 {
 440         unsigned int i;
 441         struct pmd_internals *internals = dev->data->dev_private;
 442         struct pcap_tx_queue *tx;
 443         struct pcap_rx_queue *rx;
 444
 445         /* Special iface case. Single pcap is open and shared between tx/rx. */
 446         if (internals->single_iface) {
 447                 tx = &internals->tx_queue[0];
 448                 rx = &internals->rx_queue[0];
 449
 450                 if (!tx->pcap && strcmp(tx->type, ETH_PCAP_IFACE_ARG) == 0) {
 451                         if (open_single_iface(tx->name, &tx->pcap) < 0)
 452                                 return -1;
 453                         rx->pcap = tx->pcap;
 454                 }
 455                 goto status_up;
 456         }
 457
 458         /* If not open already, open tx pcaps/dumpers */
 459         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 460                 tx = &internals->tx_queue[i];
 461
 462                 if (!tx->dumper &&
 463                                 strcmp(tx->type, ETH_PCAP_TX_PCAP_ARG) == 0) {
 464                         if (open_single_tx_pcap(tx->name, &tx->dumper) < 0)
 465                                 return -1;
 466                 } else if (!tx->pcap &&
 467                                 strcmp(tx->type, ETH_PCAP_TX_IFACE_ARG) == 0) {
 468                         if (open_single_iface(tx->name, &tx->pcap) < 0)
 469                                 return -1;
 470                 }
 471         }
 472
 473         /* If not open already, open rx pcaps */
 474         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 475                 rx = &internals->rx_queue[i];
 476
 477                 if (rx->pcap != NULL)
 478                         continue;
 479
 480                 if (strcmp(rx->type, ETH_PCAP_RX_PCAP_ARG) == 0) {
 481                         if (open_single_rx_pcap(rx->name, &rx->pcap) < 0)
 482                                 return -1;
 483                 } else if (strcmp(rx->type, ETH_PCAP_RX_IFACE_ARG) == 0) {
 484                         if (open_single_iface(rx->name, &rx->pcap) < 0)
 485                                 return -1;
 486                 }
 487         }
 488
 489 status_up:
 490         dev->data->dev_link.link_status = ETH_LINK_UP;
 491
 492         return 0;
 493 }
 494
 495 /*
 496  * This function gets called when the current port gets stopped.
 497  * Is the only place for us to close all the tx streams dumpers.
 498  * If not called the dumpers will be flushed within each tx burst.
 499  */
 500 static void
 501 eth_dev_stop(struct rte_eth_dev *dev)
 502 {
 503         unsigned int i;
 504         struct pmd_internals *internals = dev->data->dev_private;
 505         struct pcap_tx_queue *tx;
 506         struct pcap_rx_queue *rx;
 507
 508         /* Special iface case. Single pcap is open and shared between tx/rx. */
 509         if (internals->single_iface) {
 510                 tx = &internals->tx_queue[0];
 511                 rx = &internals->rx_queue[0];
 512                 pcap_close(tx->pcap);
 513                 tx->pcap = NULL;
 514                 rx->pcap = NULL;
 515                 goto status_down;
 516         }
 517
 518         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 519                 tx = &internals->tx_queue[i];
 520
 521                 if (tx->dumper != NULL) {
 522                         pcap_dump_close(tx->dumper);
 523                         tx->dumper = NULL;
 524                 }
 525
 526                 if (tx->pcap != NULL) {
 527                         pcap_close(tx->pcap);
 528                         tx->pcap = NULL;
 529                 }
 530         }
 531
 532         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 533                 rx = &internals->rx_queue[i];
 534
 535                 if (rx->pcap != NULL) {
 536                         pcap_close(rx->pcap);
 537                         rx->pcap = NULL;
 538                 }
 539         }
 540
 541 status_down:
 542         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 543 }
 544
 545 static int
 546 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 547 {
 548         return 0;
 549 }
 550
 551 static void
 552 eth_dev_info(struct rte_eth_dev *dev,
 553                 struct rte_eth_dev_info *dev_info)
 554 {
 555         struct pmd_internals *internals = dev->data->dev_private;
 556
 557         dev_info->if_index = internals->if_index;
 558         dev_info->max_mac_addrs = 1;
 559         dev_info->max_rx_pktlen = (uint32_t) -1;
 560         dev_info->max_rx_queues = dev->data->nb_rx_queues;
 561         dev_info->max_tx_queues = dev->data->nb_tx_queues;
 562         dev_info->min_rx_bufsize = 0;
 563 }
 564
 565 static int
 566 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 567 {
 568         unsigned int i;
 569         unsigned long rx_packets_total = 0, rx_bytes_total = 0;
 570         unsigned long tx_packets_total = 0, tx_bytes_total = 0;
 571         unsigned long tx_packets_err_total = 0;
 572         const struct pmd_internals *internal = dev->data->dev_private;
 573
 574         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 575                         i < dev->data->nb_rx_queues; i++) {
 576                 stats->q_ipackets[i] = internal->rx_queue[i].rx_stat.pkts;
 577                 stats->q_ibytes[i] = internal->rx_queue[i].rx_stat.bytes;
 578                 rx_packets_total += stats->q_ipackets[i];
 579                 rx_bytes_total += stats->q_ibytes[i];
 580         }
 581
 582         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 583                         i < dev->data->nb_tx_queues; i++) {
 584                 stats->q_opackets[i] = internal->tx_queue[i].tx_stat.pkts;
 585                 stats->q_obytes[i] = internal->tx_queue[i].tx_stat.bytes;
 586                 stats->q_errors[i] = internal->tx_queue[i].tx_stat.err_pkts;
 587                 tx_packets_total += stats->q_opackets[i];
 588                 tx_bytes_total += stats->q_obytes[i];
 589                 tx_packets_err_total += stats->q_errors[i];
 590         }
 591
 592         stats->ipackets = rx_packets_total;
 593         stats->ibytes = rx_bytes_total;
 594         stats->opackets = tx_packets_total;
 595         stats->obytes = tx_bytes_total;
 596         stats->oerrors = tx_packets_err_total;
 597
 598         return 0;
 599 }
 600
 601 static void
 602 eth_stats_reset(struct rte_eth_dev *dev)
 603 {
 604         unsigned int i;
 605         struct pmd_internals *internal = dev->data->dev_private;
 606
 607         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 608                 internal->rx_queue[i].rx_stat.pkts = 0;
 609                 internal->rx_queue[i].rx_stat.bytes = 0;
 610         }
 611
 612         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 613                 internal->tx_queue[i].tx_stat.pkts = 0;
 614                 internal->tx_queue[i].tx_stat.bytes = 0;
 615                 internal->tx_queue[i].tx_stat.err_pkts = 0;
 616         }
 617 }
 618
 619 static void
 620 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 621 {
 622 }
 623
 624 static void
 625 eth_queue_release(void *q __rte_unused)
 626 {
 627 }
 628
 629 static int
 630 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 631                 int wait_to_complete __rte_unused)
 632 {
 633         return 0;
 634 }
 635
 636 static int
 637 eth_rx_queue_setup(struct rte_eth_dev *dev,
 638                 uint16_t rx_queue_id,
 639                 uint16_t nb_rx_desc __rte_unused,
 640                 unsigned int socket_id __rte_unused,
 641                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 642                 struct rte_mempool *mb_pool)
 643 {
 644         struct pmd_internals *internals = dev->data->dev_private;
 645         struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id];
 646
 647         pcap_q->mb_pool = mb_pool;
 648         dev->data->rx_queues[rx_queue_id] = pcap_q;
 649         pcap_q->in_port = dev->data->port_id;
 650
 651         return 0;
 652 }
 653
 654 static int
 655 eth_tx_queue_setup(struct rte_eth_dev *dev,
 656                 uint16_t tx_queue_id,
 657                 uint16_t nb_tx_desc __rte_unused,
 658                 unsigned int socket_id __rte_unused,
 659                 const struct rte_eth_txconf *tx_conf __rte_unused)
 660 {
 661         struct pmd_internals *internals = dev->data->dev_private;
 662
 663         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 664
 665         return 0;
 666 }
 667
 668 static const struct eth_dev_ops ops = {
 669         .dev_start = eth_dev_start,
 670         .dev_stop = eth_dev_stop,
 671         .dev_close = eth_dev_close,
 672         .dev_configure = eth_dev_configure,
 673         .dev_infos_get = eth_dev_info,
 674         .rx_queue_setup = eth_rx_queue_setup,
 675         .tx_queue_setup = eth_tx_queue_setup,
 676         .rx_queue_release = eth_queue_release,
 677         .tx_queue_release = eth_queue_release,
 678         .link_update = eth_link_update,
 679         .stats_get = eth_stats_get,
 680         .stats_reset = eth_stats_reset,
 681 };
 682
 683 /*
 684  * Function handler that opens the pcap file for reading a stores a
 685  * reference of it for use it later on.
 686  */
 687 static int
 688 open_rx_pcap(const char *key, const char *value, void *extra_args)
 689 {
 690         const char *pcap_filename = value;
 691         struct pmd_devargs *rx = extra_args;
 692         pcap_t *pcap = NULL;
 693
 694         if (rx->num_of_queue >= RTE_PMD_PCAP_MAX_QUEUES)
 695                 return -1;
 696         if (open_single_rx_pcap(pcap_filename, &pcap) < 0)
 697                 return -1;
 698
 699         rx->queue[rx->num_of_queue].pcap = pcap;
 700         rx->queue[rx->num_of_queue].name = pcap_filename;
 701         rx->queue[rx->num_of_queue].type = key;
 702         rx->num_of_queue++;
 703
 704         return 0;
 705 }
 706
 707 /*
 708  * Opens a pcap file for writing and stores a reference to it
 709  * for use it later on.
 710  */
 711 static int
 712 open_tx_pcap(const char *key, const char *value, void *extra_args)
 713 {
 714         const char *pcap_filename = value;
 715         struct pmd_devargs *dumpers = extra_args;
 716         pcap_dumper_t *dumper;
 717
 718         if (dumpers->num_of_queue >= RTE_PMD_PCAP_MAX_QUEUES)
 719                 return -1;
 720         if (open_single_tx_pcap(pcap_filename, &dumper) < 0)
 721                 return -1;
 722
 723         dumpers->queue[dumpers->num_of_queue].dumper = dumper;
 724         dumpers->queue[dumpers->num_of_queue].name = pcap_filename;
 725         dumpers->queue[dumpers->num_of_queue].type = key;
 726         dumpers->num_of_queue++;
 727
 728         return 0;
 729 }
 730
 731 /*
 732  * Opens an interface for reading and writing
 733  */
 734 static inline int
 735 open_rx_tx_iface(const char *key, const char *value, void *extra_args)
 736 {
 737         const char *iface = value;
 738         struct pmd_devargs *tx = extra_args;
 739         pcap_t *pcap = NULL;
 740
 741         if (open_single_iface(iface, &pcap) < 0)
 742                 return -1;
 743
 744         tx->queue[0].pcap = pcap;
 745         tx->queue[0].name = iface;
 746         tx->queue[0].type = key;
 747
 748         return 0;
 749 }
 750
 751 /*
 752  * Opens a NIC for reading packets from it
 753  */
 754 static inline int
 755 open_rx_iface(const char *key, const char *value, void *extra_args)
 756 {
 757         const char *iface = value;
 758         struct pmd_devargs *rx = extra_args;
 759         pcap_t *pcap = NULL;
 760
 761         if (rx->num_of_queue >= RTE_PMD_PCAP_MAX_QUEUES)
 762                 return -1;
 763         if (open_single_iface(iface, &pcap) < 0)
 764                 return -1;
 765         rx->queue[rx->num_of_queue].pcap = pcap;
 766         rx->queue[rx->num_of_queue].name = iface;
 767         rx->queue[rx->num_of_queue].type = key;
 768         rx->num_of_queue++;
 769
 770         return 0;
 771 }
 772
 773 /*
 774  * Opens a NIC for writing packets to it
 775  */
 776 static int
 777 open_tx_iface(const char *key, const char *value, void *extra_args)
 778 {
 779         const char *iface = value;
 780         struct pmd_devargs *tx = extra_args;
 781         pcap_t *pcap;
 782
 783         if (tx->num_of_queue >= RTE_PMD_PCAP_MAX_QUEUES)
 784                 return -1;
 785         if (open_single_iface(iface, &pcap) < 0)
 786                 return -1;
 787         tx->queue[tx->num_of_queue].pcap = pcap;
 788         tx->queue[tx->num_of_queue].name = iface;
 789         tx->queue[tx->num_of_queue].type = key;
 790         tx->num_of_queue++;
 791
 792         return 0;
 793 }
 794
 795 static struct rte_vdev_driver pmd_pcap_drv;
 796
 797 static int
 798 pmd_init_internals(struct rte_vdev_device *vdev,
 799                 const unsigned int nb_rx_queues,
 800                 const unsigned int nb_tx_queues,
 801                 struct pmd_internals **internals,
 802                 struct rte_eth_dev **eth_dev)
 803 {
 804         struct rte_eth_dev_data *data = NULL;
 805         unsigned int numa_node = vdev->device.numa_node;
 806         const char *name;
 807
 808         name = rte_vdev_device_name(vdev);
 809         RTE_LOG(INFO, PMD, "Creating pcap-backed ethdev on numa socket %d\n",
 810                 numa_node);
 811
 812         /* now do all data allocation - for eth_dev structure
 813          * and internal (private) data
 814          */
 815         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 816         if (data == NULL)
 817                 return -1;
 818
 819         /* reserve an ethdev entry */
 820         *eth_dev = rte_eth_vdev_allocate(vdev, sizeof(**internals));
 821         if (*eth_dev == NULL) {
 822                 rte_free(data);
 823                 return -1;
 824         }
 825
 826         /* now put it all together
 827          * - store queue data in internals,
 828          * - store numa_node info in eth_dev
 829          * - point eth_dev_data to internals
 830          * - and point eth_dev structure to new eth_dev_data structure
 831          */
 832         *internals = (*eth_dev)->data->dev_private;
 833         rte_memcpy(data, (*eth_dev)->data, sizeof(*data));
 834         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 835         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 836         data->dev_link = pmd_link;
 837         data->mac_addrs = &eth_addr;
 838
 839         /*
 840          * NOTE: we'll replace the data element, of originally allocated
 841          * eth_dev so the rings are local per-process
 842          */
 843         (*eth_dev)->data = data;
 844         (*eth_dev)->dev_ops = &ops;
 845
 846         return 0;
 847 }
 848
 849 static int
 850 eth_from_pcaps_common(struct rte_vdev_device *vdev,
 851                 struct pmd_devargs *rx_queues, const unsigned int nb_rx_queues,
 852                 struct pmd_devargs *tx_queues, const unsigned int nb_tx_queues,
 853                 struct rte_kvargs *kvlist, struct pmd_internals **internals,
 854                 struct rte_eth_dev **eth_dev)
 855 {
 856         struct rte_kvargs_pair *pair = NULL;
 857         unsigned int k_idx;
 858         unsigned int i;
 859
 860         /* do some parameter checking */
 861         if (rx_queues == NULL && nb_rx_queues > 0)
 862                 return -1;
 863         if (tx_queues == NULL && nb_tx_queues > 0)
 864                 return -1;
 865
 866         if (pmd_init_internals(vdev, nb_rx_queues, nb_tx_queues, internals,
 867                         eth_dev) < 0)
 868                 return -1;
 869
 870         for (i = 0; i < nb_rx_queues; i++) {
 871                 struct pcap_rx_queue *rx = &(*internals)->rx_queue[i];
 872                 struct devargs_queue *queue = &rx_queues->queue[i];
 873
 874                 rx->pcap = queue->pcap;
 875                 snprintf(rx->name, sizeof(rx->name), "%s", queue->name);
 876                 snprintf(rx->type, sizeof(rx->type), "%s", queue->type);
 877         }
 878
 879         for (i = 0; i < nb_tx_queues; i++) {
 880                 struct pcap_tx_queue *tx = &(*internals)->tx_queue[i];
 881                 struct devargs_queue *queue = &tx_queues->queue[i];
 882
 883                 tx->dumper = queue->dumper;
 884                 tx->pcap = queue->pcap;
 885                 snprintf(tx->name, sizeof(tx->name), "%s", queue->name);
 886                 snprintf(tx->type, sizeof(tx->type), "%s", queue->type);
 887         }
 888
 889         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 890                 pair = &kvlist->pairs[k_idx];
 891                 if (strstr(pair->key, ETH_PCAP_IFACE_ARG) != NULL)
 892                         break;
 893         }
 894
 895         if (pair == NULL)
 896                 (*internals)->if_index = 0;
 897         else
 898                 (*internals)->if_index = if_nametoindex(pair->value);
 899
 900         return 0;
 901 }
 902
 903 static int
 904 eth_from_pcaps(struct rte_vdev_device *vdev,
 905                 struct pmd_devargs *rx_queues, const unsigned int nb_rx_queues,
 906                 struct pmd_devargs *tx_queues, const unsigned int nb_tx_queues,
 907                 struct rte_kvargs *kvlist, int single_iface,
 908                 unsigned int using_dumpers)
 909 {
 910         struct pmd_internals *internals = NULL;
 911         struct rte_eth_dev *eth_dev = NULL;
 912         int ret;
 913
 914         ret = eth_from_pcaps_common(vdev, rx_queues, nb_rx_queues,
 915                 tx_queues, nb_tx_queues, kvlist, &internals, &eth_dev);
 916
 917         if (ret < 0)
 918                 return ret;
 919
 920         /* store weather we are using a single interface for rx/tx or not */
 921         internals->single_iface = single_iface;
 922
 923         eth_dev->rx_pkt_burst = eth_pcap_rx;
 924
 925         if (using_dumpers)
 926                 eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
 927         else
 928                 eth_dev->tx_pkt_burst = eth_pcap_tx;
 929
 930         return 0;
 931 }
 932
 933 static int
 934 pmd_pcap_probe(struct rte_vdev_device *dev)
 935 {
 936         const char *name;
 937         unsigned int is_rx_pcap = 0, is_tx_pcap = 0;
 938         struct rte_kvargs *kvlist;
 939         struct pmd_devargs pcaps = {0};
 940         struct pmd_devargs dumpers = {0};
 941         int single_iface = 0;
 942         int ret;
 943
 944         name = rte_vdev_device_name(dev);
 945         RTE_LOG(INFO, PMD, "Initializing pmd_pcap for %s\n", name);
 946
 947         gettimeofday(&start_time, NULL);
 948         start_cycles = rte_get_timer_cycles();
 949         hz = rte_get_timer_hz();
 950
 951         kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
 952         if (kvlist == NULL)
 953                 return -1;
 954
 955         /*
 956          * If iface argument is passed we open the NICs and use them for
 957          * reading / writing
 958          */
 959         if (rte_kvargs_count(kvlist, ETH_PCAP_IFACE_ARG) == 1) {
 960
 961                 ret = rte_kvargs_process(kvlist, ETH_PCAP_IFACE_ARG,
 962                                 &open_rx_tx_iface, &pcaps);
 963
 964                 if (ret < 0)
 965                         goto free_kvlist;
 966
 967                 dumpers.queue[0] = pcaps.queue[0];
 968
 969                 single_iface = 1;
 970                 pcaps.num_of_queue = 1;
 971                 dumpers.num_of_queue = 1;
 972
 973                 goto create_eth;
 974         }
 975
 976         /*
 977          * We check whether we want to open a RX stream from a real NIC or a
 978          * pcap file
 979          */
 980         is_rx_pcap = rte_kvargs_count(kvlist, ETH_PCAP_RX_PCAP_ARG) ? 1 : 0;
 981         pcaps.num_of_queue = 0;
 982
 983         if (is_rx_pcap)
 984                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_PCAP_ARG,
 985                                 &open_rx_pcap, &pcaps);
 986         else
 987                 ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_IFACE_ARG,
 988                                 &open_rx_iface, &pcaps);
 989
 990         if (ret < 0)
 991                 goto free_kvlist;
 992
 993         /*
 994          * We check whether we want to open a TX stream to a real NIC or a
 995          * pcap file
 996          */
 997         is_tx_pcap = rte_kvargs_count(kvlist, ETH_PCAP_TX_PCAP_ARG) ? 1 : 0;
 998         dumpers.num_of_queue = 0;
 999
1000         if (is_tx_pcap)
1001                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_PCAP_ARG,
1002                                 &open_tx_pcap, &dumpers);
1003         else
1004                 ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_IFACE_ARG,
1005                                 &open_tx_iface, &dumpers);
1006
1007         if (ret < 0)
1008                 goto free_kvlist;
1009
1010 create_eth:
1011         ret = eth_from_pcaps(dev, &pcaps, pcaps.num_of_queue, &dumpers,
1012                 dumpers.num_of_queue, kvlist, single_iface, is_tx_pcap);
1013
1014 free_kvlist:
1015         rte_kvargs_free(kvlist);
1016
1017         return ret;
1018 }
1019
1020 static int
1021 pmd_pcap_remove(struct rte_vdev_device *dev)
1022 {
1023         struct rte_eth_dev *eth_dev = NULL;
1024
1025         RTE_LOG(INFO, PMD, "Closing pcap ethdev on numa socket %d\n",
1026                         rte_socket_id());
1027
1028         if (!dev)
1029                 return -1;
1030
1031         /* reserve an ethdev entry */
1032         eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1033         if (eth_dev == NULL)
1034                 return -1;
1035
1036         rte_free(eth_dev->data->dev_private);
1037         rte_free(eth_dev->data);
1038
1039         rte_eth_dev_release_port(eth_dev);
1040
1041         return 0;
1042 }
1043
1044 static struct rte_vdev_driver pmd_pcap_drv = {
1045         .probe = pmd_pcap_probe,
1046         .remove = pmd_pcap_remove,
1047 };
1048
1049 RTE_PMD_REGISTER_VDEV(net_pcap, pmd_pcap_drv);
1050 RTE_PMD_REGISTER_ALIAS(net_pcap, eth_pcap);
1051 RTE_PMD_REGISTER_PARAM_STRING(net_pcap,
1052         ETH_PCAP_RX_PCAP_ARG "=<string> "
1053         ETH_PCAP_TX_PCAP_ARG "=<string> "
1054         ETH_PCAP_RX_IFACE_ARG "=<ifc> "
1055         ETH_PCAP_TX_IFACE_ARG "=<ifc> "
1056         ETH_PCAP_IFACE_ARG "=<ifc>");