drivers/net/af_packet/rte_eth_af_packet.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2014 John W. Linville <linville@tuxdriver.com>
   3  * Originally based upon librte_pmd_pcap code:
   4  * Copyright(c) 2010-2015 Intel Corporation.
   5  * Copyright(c) 2014 6WIND S.A.
   6  * All rights reserved.
   7  */
   8
   9 #include <rte_mbuf.h>
  10 #include <rte_ethdev_driver.h>
  11 #include <rte_ethdev_vdev.h>
  12 #include <rte_malloc.h>
  13 #include <rte_kvargs.h>
  14 #include <rte_bus_vdev.h>
  15
  16 #include <linux/if_ether.h>
  17 #include <linux/if_packet.h>
  18 #include <arpa/inet.h>
  19 #include <net/if.h>
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22 #include <sys/ioctl.h>
  23 #include <sys/mman.h>
  24 #include <unistd.h>
  25 #include <poll.h>
  26
  27 #define ETH_AF_PACKET_IFACE_ARG         "iface"
  28 #define ETH_AF_PACKET_NUM_Q_ARG         "qpairs"
  29 #define ETH_AF_PACKET_BLOCKSIZE_ARG     "blocksz"
  30 #define ETH_AF_PACKET_FRAMESIZE_ARG     "framesz"
  31 #define ETH_AF_PACKET_FRAMECOUNT_ARG    "framecnt"
  32 #define ETH_AF_PACKET_QDISC_BYPASS_ARG  "qdisc_bypass"
  33
  34 #define DFLT_BLOCK_SIZE         (1 << 12)
  35 #define DFLT_FRAME_SIZE         (1 << 11)
  36 #define DFLT_FRAME_COUNT        (1 << 9)
  37
  38 #define RTE_PMD_AF_PACKET_MAX_RINGS 16
  39
  40 struct pkt_rx_queue {
  41         int sockfd;
  42
  43         struct iovec *rd;
  44         uint8_t *map;
  45         unsigned int framecount;
  46         unsigned int framenum;
  47
  48         struct rte_mempool *mb_pool;
  49         uint16_t in_port;
  50
  51         volatile unsigned long rx_pkts;
  52         volatile unsigned long err_pkts;
  53         volatile unsigned long rx_bytes;
  54 };
  55
  56 struct pkt_tx_queue {
  57         int sockfd;
  58         unsigned int frame_data_size;
  59
  60         struct iovec *rd;
  61         uint8_t *map;
  62         unsigned int framecount;
  63         unsigned int framenum;
  64
  65         volatile unsigned long tx_pkts;
  66         volatile unsigned long err_pkts;
  67         volatile unsigned long tx_bytes;
  68 };
  69
  70 struct pmd_internals {
  71         unsigned nb_queues;
  72
  73         int if_index;
  74         char *if_name;
  75         struct ether_addr eth_addr;
  76
  77         struct tpacket_req req;
  78
  79         struct pkt_rx_queue rx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
  80         struct pkt_tx_queue tx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
  81 };
  82
  83 static const char *valid_arguments[] = {
  84         ETH_AF_PACKET_IFACE_ARG,
  85         ETH_AF_PACKET_NUM_Q_ARG,
  86         ETH_AF_PACKET_BLOCKSIZE_ARG,
  87         ETH_AF_PACKET_FRAMESIZE_ARG,
  88         ETH_AF_PACKET_FRAMECOUNT_ARG,
  89         ETH_AF_PACKET_QDISC_BYPASS_ARG,
  90         NULL
  91 };
  92
  93 static struct rte_eth_link pmd_link = {
  94         .link_speed = ETH_SPEED_NUM_10G,
  95         .link_duplex = ETH_LINK_FULL_DUPLEX,
  96         .link_status = ETH_LINK_DOWN,
  97         .link_autoneg = ETH_LINK_FIXED,
  98 };
  99
 100 static int af_packet_logtype;
 101
 102 #define PMD_LOG(level, fmt, args...) \
 103         rte_log(RTE_LOG_ ## level, af_packet_logtype, \
 104                 "%s(): " fmt "\n", __func__, ##args)
 105
 106 static uint16_t
 107 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 108 {
 109         unsigned i;
 110         struct tpacket2_hdr *ppd;
 111         struct rte_mbuf *mbuf;
 112         uint8_t *pbuf;
 113         struct pkt_rx_queue *pkt_q = queue;
 114         uint16_t num_rx = 0;
 115         unsigned long num_rx_bytes = 0;
 116         unsigned int framecount, framenum;
 117
 118         if (unlikely(nb_pkts == 0))
 119                 return 0;
 120
 121         /*
 122          * Reads the given number of packets from the AF_PACKET socket one by
 123          * one and copies the packet data into a newly allocated mbuf.
 124          */
 125         framecount = pkt_q->framecount;
 126         framenum = pkt_q->framenum;
 127         for (i = 0; i < nb_pkts; i++) {
 128                 /* point at the next incoming frame */
 129                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 130                 if ((ppd->tp_status & TP_STATUS_USER) == 0)
 131                         break;
 132
 133                 /* allocate the next mbuf */
 134                 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
 135                 if (unlikely(mbuf == NULL))
 136                         break;
 137
 138                 /* packet will fit in the mbuf, go ahead and receive it */
 139                 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
 140                 pbuf = (uint8_t *) ppd + ppd->tp_mac;
 141                 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
 142
 143                 /* check for vlan info */
 144                 if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
 145                         mbuf->vlan_tci = ppd->tp_vlan_tci;
 146                         mbuf->ol_flags |= (PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED);
 147                 }
 148
 149                 /* release incoming frame and advance ring buffer */
 150                 ppd->tp_status = TP_STATUS_KERNEL;
 151                 if (++framenum >= framecount)
 152                         framenum = 0;
 153                 mbuf->port = pkt_q->in_port;
 154
 155                 /* account for the receive frame */
 156                 bufs[i] = mbuf;
 157                 num_rx++;
 158                 num_rx_bytes += mbuf->pkt_len;
 159         }
 160         pkt_q->framenum = framenum;
 161         pkt_q->rx_pkts += num_rx;
 162         pkt_q->rx_bytes += num_rx_bytes;
 163         return num_rx;
 164 }
 165
 166 /*
 167  * Callback to handle sending packets through a real NIC.
 168  */
 169 static uint16_t
 170 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 171 {
 172         struct tpacket2_hdr *ppd;
 173         struct rte_mbuf *mbuf;
 174         uint8_t *pbuf;
 175         unsigned int framecount, framenum;
 176         struct pollfd pfd;
 177         struct pkt_tx_queue *pkt_q = queue;
 178         uint16_t num_tx = 0;
 179         unsigned long num_tx_bytes = 0;
 180         int i;
 181
 182         if (unlikely(nb_pkts == 0))
 183                 return 0;
 184
 185         memset(&pfd, 0, sizeof(pfd));
 186         pfd.fd = pkt_q->sockfd;
 187         pfd.events = POLLOUT;
 188         pfd.revents = 0;
 189
 190         framecount = pkt_q->framecount;
 191         framenum = pkt_q->framenum;
 192         ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 193         for (i = 0; i < nb_pkts; i++) {
 194                 mbuf = *bufs++;
 195
 196                 /* drop oversized packets */
 197                 if (mbuf->pkt_len > pkt_q->frame_data_size) {
 198                         rte_pktmbuf_free(mbuf);
 199                         continue;
 200                 }
 201
 202                 /* insert vlan info if necessary */
 203                 if (mbuf->ol_flags & PKT_TX_VLAN_PKT) {
 204                         if (rte_vlan_insert(&mbuf)) {
 205                                 rte_pktmbuf_free(mbuf);
 206                                 continue;
 207                         }
 208                 }
 209
 210                 /* point at the next incoming frame */
 211                 if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
 212                     (poll(&pfd, 1, -1) < 0))
 213                         break;
 214
 215                 /* copy the tx frame data */
 216                 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
 217                         sizeof(struct sockaddr_ll);
 218
 219                 struct rte_mbuf *tmp_mbuf = mbuf;
 220                 while (tmp_mbuf) {
 221                         uint16_t data_len = rte_pktmbuf_data_len(tmp_mbuf);
 222                         memcpy(pbuf, rte_pktmbuf_mtod(tmp_mbuf, void*), data_len);
 223                         pbuf += data_len;
 224                         tmp_mbuf = tmp_mbuf->next;
 225                 }
 226
 227                 ppd->tp_len = mbuf->pkt_len;
 228                 ppd->tp_snaplen = mbuf->pkt_len;
 229
 230                 /* release incoming frame and advance ring buffer */
 231                 ppd->tp_status = TP_STATUS_SEND_REQUEST;
 232                 if (++framenum >= framecount)
 233                         framenum = 0;
 234                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 235
 236                 num_tx++;
 237                 num_tx_bytes += mbuf->pkt_len;
 238                 rte_pktmbuf_free(mbuf);
 239         }
 240
 241         /* kick-off transmits */
 242         if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1) {
 243                 /* error sending -- no packets transmitted */
 244                 num_tx = 0;
 245                 num_tx_bytes = 0;
 246         }
 247
 248         pkt_q->framenum = framenum;
 249         pkt_q->tx_pkts += num_tx;
 250         pkt_q->err_pkts += i - num_tx;
 251         pkt_q->tx_bytes += num_tx_bytes;
 252         return i;
 253 }
 254
 255 static int
 256 eth_dev_start(struct rte_eth_dev *dev)
 257 {
 258         dev->data->dev_link.link_status = ETH_LINK_UP;
 259         return 0;
 260 }
 261
 262 /*
 263  * This function gets called when the current port gets stopped.
 264  */
 265 static void
 266 eth_dev_stop(struct rte_eth_dev *dev)
 267 {
 268         unsigned i;
 269         int sockfd;
 270         struct pmd_internals *internals = dev->data->dev_private;
 271
 272         for (i = 0; i < internals->nb_queues; i++) {
 273                 sockfd = internals->rx_queue[i].sockfd;
 274                 if (sockfd != -1)
 275                         close(sockfd);
 276
 277                 /* Prevent use after free in case tx fd == rx fd */
 278                 if (sockfd != internals->tx_queue[i].sockfd) {
 279                         sockfd = internals->tx_queue[i].sockfd;
 280                         if (sockfd != -1)
 281                                 close(sockfd);
 282                 }
 283
 284                 internals->rx_queue[i].sockfd = -1;
 285                 internals->tx_queue[i].sockfd = -1;
 286         }
 287
 288         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 289 }
 290
 291 static int
 292 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 293 {
 294         return 0;
 295 }
 296
 297 static void
 298 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 299 {
 300         struct pmd_internals *internals = dev->data->dev_private;
 301
 302         dev_info->if_index = internals->if_index;
 303         dev_info->max_mac_addrs = 1;
 304         dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
 305         dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
 306         dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
 307         dev_info->min_rx_bufsize = 0;
 308         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_CRC_STRIP;
 309 }
 310
 311 static int
 312 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 313 {
 314         unsigned i, imax;
 315         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 316         unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
 317         const struct pmd_internals *internal = dev->data->dev_private;
 318
 319         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 320                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 321         for (i = 0; i < imax; i++) {
 322                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 323                 igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes;
 324                 rx_total += igb_stats->q_ipackets[i];
 325                 rx_bytes_total += igb_stats->q_ibytes[i];
 326         }
 327
 328         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 329                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 330         for (i = 0; i < imax; i++) {
 331                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 332                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 333                 igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes;
 334                 tx_total += igb_stats->q_opackets[i];
 335                 tx_err_total += igb_stats->q_errors[i];
 336                 tx_bytes_total += igb_stats->q_obytes[i];
 337         }
 338
 339         igb_stats->ipackets = rx_total;
 340         igb_stats->ibytes = rx_bytes_total;
 341         igb_stats->opackets = tx_total;
 342         igb_stats->oerrors = tx_err_total;
 343         igb_stats->obytes = tx_bytes_total;
 344         return 0;
 345 }
 346
 347 static void
 348 eth_stats_reset(struct rte_eth_dev *dev)
 349 {
 350         unsigned i;
 351         struct pmd_internals *internal = dev->data->dev_private;
 352
 353         for (i = 0; i < internal->nb_queues; i++) {
 354                 internal->rx_queue[i].rx_pkts = 0;
 355                 internal->rx_queue[i].rx_bytes = 0;
 356         }
 357
 358         for (i = 0; i < internal->nb_queues; i++) {
 359                 internal->tx_queue[i].tx_pkts = 0;
 360                 internal->tx_queue[i].err_pkts = 0;
 361                 internal->tx_queue[i].tx_bytes = 0;
 362         }
 363 }
 364
 365 static void
 366 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 367 {
 368 }
 369
 370 static void
 371 eth_queue_release(void *q __rte_unused)
 372 {
 373 }
 374
 375 static int
 376 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 377                 int wait_to_complete __rte_unused)
 378 {
 379         return 0;
 380 }
 381
 382 static int
 383 eth_rx_queue_setup(struct rte_eth_dev *dev,
 384                    uint16_t rx_queue_id,
 385                    uint16_t nb_rx_desc __rte_unused,
 386                    unsigned int socket_id __rte_unused,
 387                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 388                    struct rte_mempool *mb_pool)
 389 {
 390         struct pmd_internals *internals = dev->data->dev_private;
 391         struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
 392         unsigned int buf_size, data_size;
 393
 394         pkt_q->mb_pool = mb_pool;
 395
 396         /* Now get the space available for data in the mbuf */
 397         buf_size = rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
 398                 RTE_PKTMBUF_HEADROOM;
 399         data_size = internals->req.tp_frame_size;
 400         data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);
 401
 402         if (data_size > buf_size) {
 403                 PMD_LOG(ERR,
 404                         "%s: %d bytes will not fit in mbuf (%d bytes)",
 405                         dev->device->name, data_size, buf_size);
 406                 return -ENOMEM;
 407         }
 408
 409         dev->data->rx_queues[rx_queue_id] = pkt_q;
 410         pkt_q->in_port = dev->data->port_id;
 411
 412         return 0;
 413 }
 414
 415 static int
 416 eth_tx_queue_setup(struct rte_eth_dev *dev,
 417                    uint16_t tx_queue_id,
 418                    uint16_t nb_tx_desc __rte_unused,
 419                    unsigned int socket_id __rte_unused,
 420                    const struct rte_eth_txconf *tx_conf __rte_unused)
 421 {
 422
 423         struct pmd_internals *internals = dev->data->dev_private;
 424
 425         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 426         return 0;
 427 }
 428
 429 static int
 430 eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 431 {
 432         struct pmd_internals *internals = dev->data->dev_private;
 433         struct ifreq ifr = { .ifr_mtu = mtu };
 434         int ret;
 435         int s;
 436         unsigned int data_size = internals->req.tp_frame_size -
 437                                  TPACKET2_HDRLEN -
 438                                  sizeof(struct sockaddr_ll);
 439
 440         if (mtu > data_size)
 441                 return -EINVAL;
 442
 443         s = socket(PF_INET, SOCK_DGRAM, 0);
 444         if (s < 0)
 445                 return -EINVAL;
 446
 447         snprintf(ifr.ifr_name, IFNAMSIZ, "%s", internals->if_name);
 448         ret = ioctl(s, SIOCSIFMTU, &ifr);
 449         close(s);
 450
 451         if (ret < 0)
 452                 return -EINVAL;
 453
 454         return 0;
 455 }
 456
 457 static void
 458 eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
 459 {
 460         struct ifreq ifr;
 461         int s;
 462
 463         s = socket(PF_INET, SOCK_DGRAM, 0);
 464         if (s < 0)
 465                 return;
 466
 467         snprintf(ifr.ifr_name, IFNAMSIZ, "%s", if_name);
 468         if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
 469                 goto out;
 470         ifr.ifr_flags &= mask;
 471         ifr.ifr_flags |= flags;
 472         if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
 473                 goto out;
 474 out:
 475         close(s);
 476 }
 477
 478 static void
 479 eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
 480 {
 481         struct pmd_internals *internals = dev->data->dev_private;
 482
 483         eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
 484 }
 485
 486 static void
 487 eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
 488 {
 489         struct pmd_internals *internals = dev->data->dev_private;
 490
 491         eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
 492 }
 493
 494 static const struct eth_dev_ops ops = {
 495         .dev_start = eth_dev_start,
 496         .dev_stop = eth_dev_stop,
 497         .dev_close = eth_dev_close,
 498         .dev_configure = eth_dev_configure,
 499         .dev_infos_get = eth_dev_info,
 500         .mtu_set = eth_dev_mtu_set,
 501         .promiscuous_enable = eth_dev_promiscuous_enable,
 502         .promiscuous_disable = eth_dev_promiscuous_disable,
 503         .rx_queue_setup = eth_rx_queue_setup,
 504         .tx_queue_setup = eth_tx_queue_setup,
 505         .rx_queue_release = eth_queue_release,
 506         .tx_queue_release = eth_queue_release,
 507         .link_update = eth_link_update,
 508         .stats_get = eth_stats_get,
 509         .stats_reset = eth_stats_reset,
 510 };
 511
 512 /*
 513  * Opens an AF_PACKET socket
 514  */
 515 static int
 516 open_packet_iface(const char *key __rte_unused,
 517                   const char *value __rte_unused,
 518                   void *extra_args)
 519 {
 520         int *sockfd = extra_args;
 521
 522         /* Open an AF_PACKET socket... */
 523         *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 524         if (*sockfd == -1) {
 525                 PMD_LOG(ERR, "Could not open AF_PACKET socket");
 526                 return -1;
 527         }
 528
 529         return 0;
 530 }
 531
 532 static struct rte_vdev_driver pmd_af_packet_drv;
 533
 534 static int
 535 rte_pmd_init_internals(struct rte_vdev_device *dev,
 536                        const int sockfd,
 537                        const unsigned nb_queues,
 538                        unsigned int blocksize,
 539                        unsigned int blockcnt,
 540                        unsigned int framesize,
 541                        unsigned int framecnt,
 542                        unsigned int qdisc_bypass,
 543                        struct pmd_internals **internals,
 544                        struct rte_eth_dev **eth_dev,
 545                        struct rte_kvargs *kvlist)
 546 {
 547         const char *name = rte_vdev_device_name(dev);
 548         const unsigned int numa_node = dev->device.numa_node;
 549         struct rte_eth_dev_data *data = NULL;
 550         struct rte_kvargs_pair *pair = NULL;
 551         struct ifreq ifr;
 552         size_t ifnamelen;
 553         unsigned k_idx;
 554         struct sockaddr_ll sockaddr;
 555         struct tpacket_req *req;
 556         struct pkt_rx_queue *rx_queue;
 557         struct pkt_tx_queue *tx_queue;
 558         int rc, tpver, discard;
 559         int qsockfd = -1;
 560         unsigned int i, q, rdsize;
 561 #if defined(PACKET_FANOUT)
 562         int fanout_arg;
 563 #endif
 564
 565         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 566                 pair = &kvlist->pairs[k_idx];
 567                 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
 568                         break;
 569         }
 570         if (pair == NULL) {
 571                 PMD_LOG(ERR,
 572                         "%s: no interface specified for AF_PACKET ethdev",
 573                         name);
 574                 return -1;
 575         }
 576
 577         PMD_LOG(INFO,
 578                 "%s: creating AF_PACKET-backed ethdev on numa socket %u",
 579                 name, numa_node);
 580
 581         *internals = rte_zmalloc_socket(name, sizeof(**internals),
 582                                         0, numa_node);
 583         if (*internals == NULL)
 584                 return -1;
 585
 586         for (q = 0; q < nb_queues; q++) {
 587                 (*internals)->rx_queue[q].map = MAP_FAILED;
 588                 (*internals)->tx_queue[q].map = MAP_FAILED;
 589         }
 590
 591         req = &((*internals)->req);
 592
 593         req->tp_block_size = blocksize;
 594         req->tp_block_nr = blockcnt;
 595         req->tp_frame_size = framesize;
 596         req->tp_frame_nr = framecnt;
 597
 598         ifnamelen = strlen(pair->value);
 599         if (ifnamelen < sizeof(ifr.ifr_name)) {
 600                 memcpy(ifr.ifr_name, pair->value, ifnamelen);
 601                 ifr.ifr_name[ifnamelen] = '\0';
 602         } else {
 603                 PMD_LOG(ERR,
 604                         "%s: I/F name too long (%s)",
 605                         name, pair->value);
 606                 return -1;
 607         }
 608         if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
 609                 PMD_LOG(ERR,
 610                         "%s: ioctl failed (SIOCGIFINDEX)",
 611                         name);
 612                 return -1;
 613         }
 614         (*internals)->if_name = strdup(pair->value);
 615         if ((*internals)->if_name == NULL)
 616                 return -1;
 617         (*internals)->if_index = ifr.ifr_ifindex;
 618
 619         if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
 620                 PMD_LOG(ERR,
 621                         "%s: ioctl failed (SIOCGIFHWADDR)",
 622                         name);
 623                 return -1;
 624         }
 625         memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 626
 627         memset(&sockaddr, 0, sizeof(sockaddr));
 628         sockaddr.sll_family = AF_PACKET;
 629         sockaddr.sll_protocol = htons(ETH_P_ALL);
 630         sockaddr.sll_ifindex = (*internals)->if_index;
 631
 632 #if defined(PACKET_FANOUT)
 633         fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
 634         fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
 635 #if defined(PACKET_FANOUT_FLAG_ROLLOVER)
 636         fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
 637 #endif
 638 #endif
 639
 640         for (q = 0; q < nb_queues; q++) {
 641                 /* Open an AF_PACKET socket for this queue... */
 642                 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 643                 if (qsockfd == -1) {
 644                         PMD_LOG(ERR,
 645                                 "%s: could not open AF_PACKET socket",
 646                                 name);
 647                         return -1;
 648                 }
 649
 650                 tpver = TPACKET_V2;
 651                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
 652                                 &tpver, sizeof(tpver));
 653                 if (rc == -1) {
 654                         PMD_LOG(ERR,
 655                                 "%s: could not set PACKET_VERSION on AF_PACKET socket for %s",
 656                                 name, pair->value);
 657                         goto error;
 658                 }
 659
 660                 discard = 1;
 661                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
 662                                 &discard, sizeof(discard));
 663                 if (rc == -1) {
 664                         PMD_LOG(ERR,
 665                                 "%s: could not set PACKET_LOSS on AF_PACKET socket for %s",
 666                                 name, pair->value);
 667                         goto error;
 668                 }
 669
 670 #if defined(PACKET_QDISC_BYPASS)
 671                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
 672                                 &qdisc_bypass, sizeof(qdisc_bypass));
 673                 if (rc == -1) {
 674                         PMD_LOG(ERR,
 675                                 "%s: could not set PACKET_QDISC_BYPASS on AF_PACKET socket for %s",
 676                                 name, pair->value);
 677                         goto error;
 678                 }
 679 #else
 680                 RTE_SET_USED(qdisc_bypass);
 681 #endif
 682
 683                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
 684                 if (rc == -1) {
 685                         PMD_LOG(ERR,
 686                                 "%s: could not set PACKET_RX_RING on AF_PACKET socket for %s",
 687                                 name, pair->value);
 688                         goto error;
 689                 }
 690
 691                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
 692                 if (rc == -1) {
 693                         PMD_LOG(ERR,
 694                                 "%s: could not set PACKET_TX_RING on AF_PACKET "
 695                                 "socket for %s", name, pair->value);
 696                         goto error;
 697                 }
 698
 699                 rx_queue = &((*internals)->rx_queue[q]);
 700                 rx_queue->framecount = req->tp_frame_nr;
 701
 702                 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
 703                                     PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
 704                                     qsockfd, 0);
 705                 if (rx_queue->map == MAP_FAILED) {
 706                         PMD_LOG(ERR,
 707                                 "%s: call to mmap failed on AF_PACKET socket for %s",
 708                                 name, pair->value);
 709                         goto error;
 710                 }
 711
 712                 /* rdsize is same for both Tx and Rx */
 713                 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));
 714
 715                 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 716                 if (rx_queue->rd == NULL)
 717                         goto error;
 718                 for (i = 0; i < req->tp_frame_nr; ++i) {
 719                         rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
 720                         rx_queue->rd[i].iov_len = req->tp_frame_size;
 721                 }
 722                 rx_queue->sockfd = qsockfd;
 723
 724                 tx_queue = &((*internals)->tx_queue[q]);
 725                 tx_queue->framecount = req->tp_frame_nr;
 726                 tx_queue->frame_data_size = req->tp_frame_size;
 727                 tx_queue->frame_data_size -= TPACKET2_HDRLEN -
 728                         sizeof(struct sockaddr_ll);
 729
 730                 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
 731
 732                 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 733                 if (tx_queue->rd == NULL)
 734                         goto error;
 735                 for (i = 0; i < req->tp_frame_nr; ++i) {
 736                         tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
 737                         tx_queue->rd[i].iov_len = req->tp_frame_size;
 738                 }
 739                 tx_queue->sockfd = qsockfd;
 740
 741                 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
 742                 if (rc == -1) {
 743                         PMD_LOG(ERR,
 744                                 "%s: could not bind AF_PACKET socket to %s",
 745                                 name, pair->value);
 746                         goto error;
 747                 }
 748
 749 #if defined(PACKET_FANOUT)
 750                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
 751                                 &fanout_arg, sizeof(fanout_arg));
 752                 if (rc == -1) {
 753                         PMD_LOG(ERR,
 754                                 "%s: could not set PACKET_FANOUT on AF_PACKET socket "
 755                                 "for %s", name, pair->value);
 756                         goto error;
 757                 }
 758 #endif
 759         }
 760
 761         /* reserve an ethdev entry */
 762         *eth_dev = rte_eth_vdev_allocate(dev, 0);
 763         if (*eth_dev == NULL)
 764                 goto error;
 765
 766         /*
 767          * now put it all together
 768          * - store queue data in internals,
 769          * - store numa_node in eth_dev
 770          * - point eth_dev_data to internals
 771          * - and point eth_dev structure to new eth_dev_data structure
 772          */
 773
 774         (*internals)->nb_queues = nb_queues;
 775
 776         data = (*eth_dev)->data;
 777         data->dev_private = *internals;
 778         data->nb_rx_queues = (uint16_t)nb_queues;
 779         data->nb_tx_queues = (uint16_t)nb_queues;
 780         data->dev_link = pmd_link;
 781         data->mac_addrs = &(*internals)->eth_addr;
 782
 783         (*eth_dev)->dev_ops = &ops;
 784
 785         return 0;
 786
 787 error:
 788         if (qsockfd != -1)
 789                 close(qsockfd);
 790         for (q = 0; q < nb_queues; q++) {
 791                 munmap((*internals)->rx_queue[q].map,
 792                        2 * req->tp_block_size * req->tp_block_nr);
 793
 794                 rte_free((*internals)->rx_queue[q].rd);
 795                 rte_free((*internals)->tx_queue[q].rd);
 796                 if (((*internals)->rx_queue[q].sockfd != 0) &&
 797                         ((*internals)->rx_queue[q].sockfd != qsockfd))
 798                         close((*internals)->rx_queue[q].sockfd);
 799         }
 800         free((*internals)->if_name);
 801         rte_free(*internals);
 802         return -1;
 803 }
 804
 805 static int
 806 rte_eth_from_packet(struct rte_vdev_device *dev,
 807                     int const *sockfd,
 808                     struct rte_kvargs *kvlist)
 809 {
 810         const char *name = rte_vdev_device_name(dev);
 811         struct pmd_internals *internals = NULL;
 812         struct rte_eth_dev *eth_dev = NULL;
 813         struct rte_kvargs_pair *pair = NULL;
 814         unsigned k_idx;
 815         unsigned int blockcount;
 816         unsigned int blocksize = DFLT_BLOCK_SIZE;
 817         unsigned int framesize = DFLT_FRAME_SIZE;
 818         unsigned int framecount = DFLT_FRAME_COUNT;
 819         unsigned int qpairs = 1;
 820         unsigned int qdisc_bypass = 1;
 821
 822         /* do some parameter checking */
 823         if (*sockfd < 0)
 824                 return -1;
 825
 826         /*
 827          * Walk arguments for configurable settings
 828          */
 829         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 830                 pair = &kvlist->pairs[k_idx];
 831                 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
 832                         qpairs = atoi(pair->value);
 833                         if (qpairs < 1 ||
 834                             qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) {
 835                                 PMD_LOG(ERR,
 836                                         "%s: invalid qpairs value",
 837                                         name);
 838                                 return -1;
 839                         }
 840                         continue;
 841                 }
 842                 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
 843                         blocksize = atoi(pair->value);
 844                         if (!blocksize) {
 845                                 PMD_LOG(ERR,
 846                                         "%s: invalid blocksize value",
 847                                         name);
 848                                 return -1;
 849                         }
 850                         continue;
 851                 }
 852                 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
 853                         framesize = atoi(pair->value);
 854                         if (!framesize) {
 855                                 PMD_LOG(ERR,
 856                                         "%s: invalid framesize value",
 857                                         name);
 858                                 return -1;
 859                         }
 860                         continue;
 861                 }
 862                 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
 863                         framecount = atoi(pair->value);
 864                         if (!framecount) {
 865                                 PMD_LOG(ERR,
 866                                         "%s: invalid framecount value",
 867                                         name);
 868                                 return -1;
 869                         }
 870                         continue;
 871                 }
 872                 if (strstr(pair->key, ETH_AF_PACKET_QDISC_BYPASS_ARG) != NULL) {
 873                         qdisc_bypass = atoi(pair->value);
 874                         if (qdisc_bypass > 1) {
 875                                 PMD_LOG(ERR,
 876                                         "%s: invalid bypass value",
 877                                         name);
 878                                 return -1;
 879                         }
 880                         continue;
 881                 }
 882         }
 883
 884         if (framesize > blocksize) {
 885                 PMD_LOG(ERR,
 886                         "%s: AF_PACKET MMAP frame size exceeds block size!",
 887                         name);
 888                 return -1;
 889         }
 890
 891         blockcount = framecount / (blocksize / framesize);
 892         if (!blockcount) {
 893                 PMD_LOG(ERR,
 894                         "%s: invalid AF_PACKET MMAP parameters", name);
 895                 return -1;
 896         }
 897
 898         PMD_LOG(INFO, "%s: AF_PACKET MMAP parameters:", name);
 899         PMD_LOG(INFO, "%s:\tblock size %d", name, blocksize);
 900         PMD_LOG(INFO, "%s:\tblock count %d", name, blockcount);
 901         PMD_LOG(INFO, "%s:\tframe size %d", name, framesize);
 902         PMD_LOG(INFO, "%s:\tframe count %d", name, framecount);
 903
 904         if (rte_pmd_init_internals(dev, *sockfd, qpairs,
 905                                    blocksize, blockcount,
 906                                    framesize, framecount,
 907                                    qdisc_bypass,
 908                                    &internals, &eth_dev,
 909                                    kvlist) < 0)
 910                 return -1;
 911
 912         eth_dev->rx_pkt_burst = eth_af_packet_rx;
 913         eth_dev->tx_pkt_burst = eth_af_packet_tx;
 914
 915         rte_eth_dev_probing_finish(eth_dev);
 916         return 0;
 917 }
 918
 919 static int
 920 rte_pmd_af_packet_probe(struct rte_vdev_device *dev)
 921 {
 922         int ret = 0;
 923         struct rte_kvargs *kvlist;
 924         int sockfd = -1;
 925         struct rte_eth_dev *eth_dev;
 926         const char *name = rte_vdev_device_name(dev);
 927
 928         PMD_LOG(INFO, "Initializing pmd_af_packet for %s", name);
 929
 930         if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
 931             strlen(rte_vdev_device_args(dev)) == 0) {
 932                 eth_dev = rte_eth_dev_attach_secondary(name);
 933                 if (!eth_dev) {
 934                         PMD_LOG(ERR, "Failed to probe %s", name);
 935                         return -1;
 936                 }
 937                 /* TODO: request info from primary to set up Rx and Tx */
 938                 eth_dev->dev_ops = &ops;
 939                 eth_dev->device = &dev->device;
 940                 rte_eth_dev_probing_finish(eth_dev);
 941                 return 0;
 942         }
 943
 944         kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
 945         if (kvlist == NULL) {
 946                 ret = -1;
 947                 goto exit;
 948         }
 949
 950         /*
 951          * If iface argument is passed we open the NICs and use them for
 952          * reading / writing
 953          */
 954         if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {
 955
 956                 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
 957                                          &open_packet_iface, &sockfd);
 958                 if (ret < 0)
 959                         goto exit;
 960         }
 961
 962         if (dev->device.numa_node == SOCKET_ID_ANY)
 963                 dev->device.numa_node = rte_socket_id();
 964
 965         ret = rte_eth_from_packet(dev, &sockfd, kvlist);
 966         close(sockfd); /* no longer needed */
 967
 968 exit:
 969         rte_kvargs_free(kvlist);
 970         return ret;
 971 }
 972
 973 static int
 974 rte_pmd_af_packet_remove(struct rte_vdev_device *dev)
 975 {
 976         struct rte_eth_dev *eth_dev = NULL;
 977         struct pmd_internals *internals;
 978         unsigned q;
 979
 980         PMD_LOG(INFO, "Closing AF_PACKET ethdev on numa socket %u",
 981                 rte_socket_id());
 982
 983         if (dev == NULL)
 984                 return -1;
 985
 986         /* find the ethdev entry */
 987         eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
 988         if (eth_dev == NULL)
 989                 return -1;
 990
 991         internals = eth_dev->data->dev_private;
 992         for (q = 0; q < internals->nb_queues; q++) {
 993                 rte_free(internals->rx_queue[q].rd);
 994                 rte_free(internals->tx_queue[q].rd);
 995         }
 996         free(internals->if_name);
 997
 998         rte_free(eth_dev->data->dev_private);
 999
1000         rte_eth_dev_release_port(eth_dev);
1001
1002         return 0;
1003 }
1004
1005 static struct rte_vdev_driver pmd_af_packet_drv = {
1006         .probe = rte_pmd_af_packet_probe,
1007         .remove = rte_pmd_af_packet_remove,
1008 };
1009
1010 RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv);
1011 RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet);
1012 RTE_PMD_REGISTER_PARAM_STRING(net_af_packet,
1013         "iface=<string> "
1014         "qpairs=<int> "
1015         "blocksz=<int> "
1016         "framesz=<int> "
1017         "framecnt=<int> "
1018         "qdisc_bypass=<0|1>");
1019
1020 RTE_INIT(af_packet_init_log)
1021 {
1022         af_packet_logtype = rte_log_register("pmd.net.packet");
1023         if (af_packet_logtype >= 0)
1024                 rte_log_set_level(af_packet_logtype, RTE_LOG_NOTICE);
1025 }