drivers/net/failsafe/failsafe_ether.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2017 6WIND S.A.
   3  * Copyright 2017 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <unistd.h>
   7
   8 #include <rte_flow.h>
   9 #include <rte_flow_driver.h>
  10 #include <rte_cycles.h>
  11
  12 #include "failsafe_private.h"
  13
  14 /** Print a message out of a flow error. */
  15 static int
  16 fs_flow_complain(struct rte_flow_error *error)
  17 {
  18         static const char *const errstrlist[] = {
  19                 [RTE_FLOW_ERROR_TYPE_NONE] = "no error",
  20                 [RTE_FLOW_ERROR_TYPE_UNSPECIFIED] = "cause unspecified",
  21                 [RTE_FLOW_ERROR_TYPE_HANDLE] = "flow rule (handle)",
  22                 [RTE_FLOW_ERROR_TYPE_ATTR_GROUP] = "group field",
  23                 [RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY] = "priority field",
  24                 [RTE_FLOW_ERROR_TYPE_ATTR_INGRESS] = "ingress field",
  25                 [RTE_FLOW_ERROR_TYPE_ATTR_EGRESS] = "egress field",
  26                 [RTE_FLOW_ERROR_TYPE_ATTR] = "attributes structure",
  27                 [RTE_FLOW_ERROR_TYPE_ITEM_NUM] = "pattern length",
  28                 [RTE_FLOW_ERROR_TYPE_ITEM] = "specific pattern item",
  29                 [RTE_FLOW_ERROR_TYPE_ACTION_NUM] = "number of actions",
  30                 [RTE_FLOW_ERROR_TYPE_ACTION] = "specific action",
  31         };
  32         const char *errstr;
  33         char buf[32];
  34         int err = rte_errno;
  35
  36         if ((unsigned int)error->type >= RTE_DIM(errstrlist) ||
  37                         !errstrlist[error->type])
  38                 errstr = "unknown type";
  39         else
  40                 errstr = errstrlist[error->type];
  41         ERROR("Caught error type %d (%s): %s%s\n",
  42                 error->type, errstr,
  43                 error->cause ? (snprintf(buf, sizeof(buf), "cause: %p, ",
  44                                 error->cause), buf) : "",
  45                 error->message ? error->message : "(no stated reason)");
  46         return -err;
  47 }
  48
  49 static int
  50 eth_dev_flow_isolate_set(struct rte_eth_dev *dev,
  51                          struct sub_device *sdev)
  52 {
  53         struct rte_flow_error ferror;
  54         int ret;
  55
  56         if (!PRIV(dev)->flow_isolated) {
  57                 DEBUG("Flow isolation already disabled");
  58         } else {
  59                 DEBUG("Enabling flow isolation");
  60                 ret = rte_flow_isolate(PORT_ID(sdev),
  61                                        PRIV(dev)->flow_isolated,
  62                                        &ferror);
  63                 if (ret) {
  64                         fs_flow_complain(&ferror);
  65                         return ret;
  66                 }
  67         }
  68         return 0;
  69 }
  70
  71 static int
  72 fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
  73                 struct sub_device *sdev)
  74 {
  75         struct rte_eth_dev *edev;
  76         struct rte_vlan_filter_conf *vfc1;
  77         struct rte_vlan_filter_conf *vfc2;
  78         struct rte_flow *flow;
  79         struct rte_flow_error ferror;
  80         uint32_t i;
  81         int ret;
  82
  83         edev = ETH(sdev);
  84         /* RX queue setup */
  85         for (i = 0; i < dev->data->nb_rx_queues; i++) {
  86                 struct rxq *rxq;
  87
  88                 rxq = dev->data->rx_queues[i];
  89                 ret = rte_eth_rx_queue_setup(PORT_ID(sdev), i,
  90                                 rxq->info.nb_desc, rxq->socket_id,
  91                                 &rxq->info.conf, rxq->info.mp);
  92                 if (ret) {
  93                         ERROR("rx_queue_setup failed");
  94                         return ret;
  95                 }
  96         }
  97         /* TX queue setup */
  98         for (i = 0; i < dev->data->nb_tx_queues; i++) {
  99                 struct txq *txq;
 100
 101                 txq = dev->data->tx_queues[i];
 102                 ret = rte_eth_tx_queue_setup(PORT_ID(sdev), i,
 103                                 txq->info.nb_desc, txq->socket_id,
 104                                 &txq->info.conf);
 105                 if (ret) {
 106                         ERROR("tx_queue_setup failed");
 107                         return ret;
 108                 }
 109         }
 110         /* dev_link.link_status */
 111         if (dev->data->dev_link.link_status !=
 112             edev->data->dev_link.link_status) {
 113                 DEBUG("Configuring link_status");
 114                 if (dev->data->dev_link.link_status)
 115                         ret = rte_eth_dev_set_link_up(PORT_ID(sdev));
 116                 else
 117                         ret = rte_eth_dev_set_link_down(PORT_ID(sdev));
 118                 if (ret) {
 119                         ERROR("Failed to apply link_status");
 120                         return ret;
 121                 }
 122         } else {
 123                 DEBUG("link_status already set");
 124         }
 125         /* promiscuous */
 126         if (dev->data->promiscuous != edev->data->promiscuous) {
 127                 DEBUG("Configuring promiscuous");
 128                 if (dev->data->promiscuous)
 129                         rte_eth_promiscuous_enable(PORT_ID(sdev));
 130                 else
 131                         rte_eth_promiscuous_disable(PORT_ID(sdev));
 132         } else {
 133                 DEBUG("promiscuous already set");
 134         }
 135         /* all_multicast */
 136         if (dev->data->all_multicast != edev->data->all_multicast) {
 137                 DEBUG("Configuring all_multicast");
 138                 if (dev->data->all_multicast)
 139                         rte_eth_allmulticast_enable(PORT_ID(sdev));
 140                 else
 141                         rte_eth_allmulticast_disable(PORT_ID(sdev));
 142         } else {
 143                 DEBUG("all_multicast already set");
 144         }
 145         /* MTU */
 146         if (dev->data->mtu != edev->data->mtu) {
 147                 DEBUG("Configuring MTU");
 148                 ret = rte_eth_dev_set_mtu(PORT_ID(sdev), dev->data->mtu);
 149                 if (ret) {
 150                         ERROR("Failed to apply MTU");
 151                         return ret;
 152                 }
 153         } else {
 154                 DEBUG("MTU already set");
 155         }
 156         /* default MAC */
 157         DEBUG("Configuring default MAC address");
 158         ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
 159                         &dev->data->mac_addrs[0]);
 160         if (ret) {
 161                 ERROR("Setting default MAC address failed");
 162                 return ret;
 163         }
 164         /* additional MAC */
 165         if (PRIV(dev)->nb_mac_addr > 1)
 166                 DEBUG("Configure additional MAC address%s",
 167                         (PRIV(dev)->nb_mac_addr > 2 ? "es" : ""));
 168         for (i = 1; i < PRIV(dev)->nb_mac_addr; i++) {
 169                 struct ether_addr *ea;
 170
 171                 ea = &dev->data->mac_addrs[i];
 172                 ret = rte_eth_dev_mac_addr_add(PORT_ID(sdev), ea,
 173                                 PRIV(dev)->mac_addr_pool[i]);
 174                 if (ret) {
 175                         char ea_fmt[ETHER_ADDR_FMT_SIZE];
 176
 177                         ether_format_addr(ea_fmt, ETHER_ADDR_FMT_SIZE, ea);
 178                         ERROR("Adding MAC address %s failed", ea_fmt);
 179                         return ret;
 180                 }
 181         }
 182         /*
 183          * Propagate multicast MAC addresses to sub-devices,
 184          * if non zero number of addresses is set.
 185          * The condition is required to avoid breakage of failsafe
 186          * for sub-devices which do not support the operation
 187          * if the feature is really not used.
 188          */
 189         if (PRIV(dev)->nb_mcast_addr > 0) {
 190                 DEBUG("Configuring multicast MAC addresses");
 191                 ret = rte_eth_dev_set_mc_addr_list(PORT_ID(sdev),
 192                                                    PRIV(dev)->mcast_addrs,
 193                                                    PRIV(dev)->nb_mcast_addr);
 194                 if (ret) {
 195                         ERROR("Failed to apply multicast MAC addresses");
 196                         return ret;
 197                 }
 198         }
 199         /* VLAN filter */
 200         vfc1 = &dev->data->vlan_filter_conf;
 201         vfc2 = &edev->data->vlan_filter_conf;
 202         if (memcmp(vfc1, vfc2, sizeof(struct rte_vlan_filter_conf))) {
 203                 uint64_t vbit;
 204                 uint64_t ids;
 205                 size_t i;
 206                 uint16_t vlan_id;
 207
 208                 DEBUG("Configuring VLAN filter");
 209                 for (i = 0; i < RTE_DIM(vfc1->ids); i++) {
 210                         if (vfc1->ids[i] == 0)
 211                                 continue;
 212                         ids = vfc1->ids[i];
 213                         while (ids) {
 214                                 vlan_id = 64 * i;
 215                                 /* count trailing zeroes */
 216                                 vbit = ~ids & (ids - 1);
 217                                 /* clear least significant bit set */
 218                                 ids ^= (ids ^ (ids - 1)) ^ vbit;
 219                                 for (; vbit; vlan_id++)
 220                                         vbit >>= 1;
 221                                 ret = rte_eth_dev_vlan_filter(
 222                                         PORT_ID(sdev), vlan_id, 1);
 223                                 if (ret) {
 224                                         ERROR("Failed to apply VLAN filter %hu",
 225                                                 vlan_id);
 226                                         return ret;
 227                                 }
 228                         }
 229                 }
 230         } else {
 231                 DEBUG("VLAN filter already set");
 232         }
 233         /* rte_flow */
 234         if (TAILQ_EMPTY(&PRIV(dev)->flow_list)) {
 235                 DEBUG("rte_flow already set");
 236         } else {
 237                 DEBUG("Resetting rte_flow configuration");
 238                 ret = rte_flow_flush(PORT_ID(sdev), &ferror);
 239                 if (ret) {
 240                         fs_flow_complain(&ferror);
 241                         return ret;
 242                 }
 243                 i = 0;
 244                 rte_errno = 0;
 245                 DEBUG("Configuring rte_flow");
 246                 TAILQ_FOREACH(flow, &PRIV(dev)->flow_list, next) {
 247                         DEBUG("Creating flow #%" PRIu32, i++);
 248                         flow->flows[SUB_ID(sdev)] =
 249                                 rte_flow_create(PORT_ID(sdev),
 250                                                 flow->rule.attr,
 251                                                 flow->rule.pattern,
 252                                                 flow->rule.actions,
 253                                                 &ferror);
 254                         ret = rte_errno;
 255                         if (ret)
 256                                 break;
 257                 }
 258                 if (ret) {
 259                         fs_flow_complain(&ferror);
 260                         return ret;
 261                 }
 262         }
 263         return 0;
 264 }
 265
 266 static void
 267 fs_dev_remove(struct sub_device *sdev)
 268 {
 269         int ret;
 270
 271         if (sdev == NULL)
 272                 return;
 273         switch (sdev->state) {
 274         case DEV_STARTED:
 275                 failsafe_rx_intr_uninstall_subdevice(sdev);
 276                 rte_eth_dev_stop(PORT_ID(sdev));
 277                 sdev->state = DEV_ACTIVE;
 278                 /* fallthrough */
 279         case DEV_ACTIVE:
 280                 failsafe_eth_dev_unregister_callbacks(sdev);
 281                 rte_eth_dev_close(PORT_ID(sdev));
 282                 sdev->state = DEV_PROBED;
 283                 /* fallthrough */
 284         case DEV_PROBED:
 285                 ret = rte_dev_remove(sdev->dev);
 286                 if (ret) {
 287                         ERROR("Bus detach failed for sub_device %u",
 288                               SUB_ID(sdev));
 289                 } else {
 290                         rte_eth_dev_release_port(ETH(sdev));
 291                 }
 292                 sdev->state = DEV_PARSED;
 293                 /* fallthrough */
 294         case DEV_PARSED:
 295         case DEV_UNDEFINED:
 296                 sdev->state = DEV_UNDEFINED;
 297                 /* the end */
 298                 break;
 299         }
 300         sdev->remove = 0;
 301         failsafe_hotplug_alarm_install(fs_dev(sdev));
 302 }
 303
 304 static void
 305 fs_dev_stats_save(struct sub_device *sdev)
 306 {
 307         struct rte_eth_stats stats;
 308         int err;
 309
 310         /* Attempt to read current stats. */
 311         err = rte_eth_stats_get(PORT_ID(sdev), &stats);
 312         if (err) {
 313                 uint64_t timestamp = sdev->stats_snapshot.timestamp;
 314
 315                 WARN("Could not access latest statistics from sub-device %d.\n",
 316                          SUB_ID(sdev));
 317                 if (timestamp != 0)
 318                         WARN("Using latest snapshot taken before %"PRIu64" seconds.\n",
 319                                  (rte_rdtsc() - timestamp) / rte_get_tsc_hz());
 320         }
 321         failsafe_stats_increment
 322                 (&PRIV(fs_dev(sdev))->stats_accumulator,
 323                 err ? &sdev->stats_snapshot.stats : &stats);
 324         memset(&sdev->stats_snapshot, 0, sizeof(sdev->stats_snapshot));
 325 }
 326
 327 static inline int
 328 fs_rxtx_clean(struct sub_device *sdev)
 329 {
 330         uint16_t i;
 331
 332         for (i = 0; i < ETH(sdev)->data->nb_rx_queues; i++)
 333                 if (FS_ATOMIC_RX(sdev, i))
 334                         return 0;
 335         for (i = 0; i < ETH(sdev)->data->nb_tx_queues; i++)
 336                 if (FS_ATOMIC_TX(sdev, i))
 337                         return 0;
 338         return 1;
 339 }
 340
 341 void
 342 failsafe_eth_dev_unregister_callbacks(struct sub_device *sdev)
 343 {
 344         int ret;
 345
 346         if (sdev == NULL)
 347                 return;
 348         if (sdev->rmv_callback) {
 349                 ret = rte_eth_dev_callback_unregister(PORT_ID(sdev),
 350                                                 RTE_ETH_EVENT_INTR_RMV,
 351                                                 failsafe_eth_rmv_event_callback,
 352                                                 sdev);
 353                 if (ret)
 354                         WARN("Failed to unregister RMV callback for sub_device"
 355                              " %d", SUB_ID(sdev));
 356                 sdev->rmv_callback = 0;
 357         }
 358         if (sdev->lsc_callback) {
 359                 ret = rte_eth_dev_callback_unregister(PORT_ID(sdev),
 360                                                 RTE_ETH_EVENT_INTR_LSC,
 361                                                 failsafe_eth_lsc_event_callback,
 362                                                 sdev);
 363                 if (ret)
 364                         WARN("Failed to unregister LSC callback for sub_device"
 365                              " %d", SUB_ID(sdev));
 366                 sdev->lsc_callback = 0;
 367         }
 368 }
 369
 370 void
 371 failsafe_dev_remove(struct rte_eth_dev *dev)
 372 {
 373         struct sub_device *sdev;
 374         uint8_t i;
 375
 376         FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE)
 377                 if (sdev->remove && fs_rxtx_clean(sdev)) {
 378                         if (fs_lock(dev, 1) != 0)
 379                                 return;
 380                         fs_dev_stats_save(sdev);
 381                         fs_dev_remove(sdev);
 382                         fs_unlock(dev, 1);
 383                 }
 384 }
 385
 386 static int
 387 failsafe_eth_dev_rx_queues_sync(struct rte_eth_dev *dev)
 388 {
 389         struct rxq *rxq;
 390         int ret;
 391         uint16_t i;
 392
 393         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 394                 rxq = dev->data->rx_queues[i];
 395
 396                 if (rxq->info.conf.rx_deferred_start &&
 397                     dev->data->rx_queue_state[i] ==
 398                                                 RTE_ETH_QUEUE_STATE_STARTED) {
 399                         /*
 400                          * The subdevice Rx queue does not launch on device
 401                          * start if deferred start flag is set. It needs to be
 402                          * started manually in case an appropriate failsafe Rx
 403                          * queue has been started earlier.
 404                          */
 405                         ret = dev->dev_ops->rx_queue_start(dev, i);
 406                         if (ret) {
 407                                 ERROR("Could not synchronize Rx queue %d", i);
 408                                 return ret;
 409                         }
 410                 } else if (dev->data->rx_queue_state[i] ==
 411                                                 RTE_ETH_QUEUE_STATE_STOPPED) {
 412                         /*
 413                          * The subdevice Rx queue needs to be stopped manually
 414                          * in case an appropriate failsafe Rx queue has been
 415                          * stopped earlier.
 416                          */
 417                         ret = dev->dev_ops->rx_queue_stop(dev, i);
 418                         if (ret) {
 419                                 ERROR("Could not synchronize Rx queue %d", i);
 420                                 return ret;
 421                         }
 422                 }
 423         }
 424         return 0;
 425 }
 426
 427 static int
 428 failsafe_eth_dev_tx_queues_sync(struct rte_eth_dev *dev)
 429 {
 430         struct txq *txq;
 431         int ret;
 432         uint16_t i;
 433
 434         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 435                 txq = dev->data->tx_queues[i];
 436
 437                 if (txq->info.conf.tx_deferred_start &&
 438                     dev->data->tx_queue_state[i] ==
 439                                                 RTE_ETH_QUEUE_STATE_STARTED) {
 440                         /*
 441                          * The subdevice Tx queue does not launch on device
 442                          * start if deferred start flag is set. It needs to be
 443                          * started manually in case an appropriate failsafe Tx
 444                          * queue has been started earlier.
 445                          */
 446                         ret = dev->dev_ops->tx_queue_start(dev, i);
 447                         if (ret) {
 448                                 ERROR("Could not synchronize Tx queue %d", i);
 449                                 return ret;
 450                         }
 451                 } else if (dev->data->tx_queue_state[i] ==
 452                                                 RTE_ETH_QUEUE_STATE_STOPPED) {
 453                         /*
 454                          * The subdevice Tx queue needs to be stopped manually
 455                          * in case an appropriate failsafe Tx queue has been
 456                          * stopped earlier.
 457                          */
 458                         ret = dev->dev_ops->tx_queue_stop(dev, i);
 459                         if (ret) {
 460                                 ERROR("Could not synchronize Tx queue %d", i);
 461                                 return ret;
 462                         }
 463                 }
 464         }
 465         return 0;
 466 }
 467
 468 int
 469 failsafe_eth_dev_state_sync(struct rte_eth_dev *dev)
 470 {
 471         struct sub_device *sdev;
 472         uint32_t inactive;
 473         int ret;
 474         uint8_t i;
 475
 476         if (PRIV(dev)->state < DEV_PARSED)
 477                 return 0;
 478
 479         ret = failsafe_args_parse_subs(dev);
 480         if (ret)
 481                 goto err_remove;
 482
 483         if (PRIV(dev)->state < DEV_PROBED)
 484                 return 0;
 485         ret = failsafe_eal_init(dev);
 486         if (ret)
 487                 goto err_remove;
 488         if (PRIV(dev)->state < DEV_ACTIVE)
 489                 return 0;
 490         inactive = 0;
 491         FOREACH_SUBDEV(sdev, i, dev) {
 492                 if (sdev->state == DEV_PROBED) {
 493                         inactive |= UINT32_C(1) << i;
 494                         ret = eth_dev_flow_isolate_set(dev, sdev);
 495                         if (ret) {
 496                                 ERROR("Could not apply configuration to sub_device %d",
 497                                       i);
 498                                 goto err_remove;
 499                         }
 500                 }
 501         }
 502         ret = dev->dev_ops->dev_configure(dev);
 503         if (ret)
 504                 goto err_remove;
 505         FOREACH_SUBDEV(sdev, i, dev) {
 506                 if (inactive & (UINT32_C(1) << i)) {
 507                         ret = fs_eth_dev_conf_apply(dev, sdev);
 508                         if (ret) {
 509                                 ERROR("Could not apply configuration to sub_device %d",
 510                                       i);
 511                                 goto err_remove;
 512                         }
 513                 }
 514         }
 515         /*
 516          * If new devices have been configured, check if
 517          * the link state has changed.
 518          */
 519         if (inactive)
 520                 dev->dev_ops->link_update(dev, 1);
 521         if (PRIV(dev)->state < DEV_STARTED)
 522                 return 0;
 523         ret = dev->dev_ops->dev_start(dev);
 524         if (ret)
 525                 goto err_remove;
 526         ret = failsafe_eth_dev_rx_queues_sync(dev);
 527         if (ret)
 528                 goto err_remove;
 529         ret = failsafe_eth_dev_tx_queues_sync(dev);
 530         if (ret)
 531                 goto err_remove;
 532         return 0;
 533 err_remove:
 534         FOREACH_SUBDEV(sdev, i, dev)
 535                 if (sdev->state != PRIV(dev)->state)
 536                         sdev->remove = 1;
 537         return ret;
 538 }
 539
 540 void
 541 failsafe_stats_increment(struct rte_eth_stats *to, struct rte_eth_stats *from)
 542 {
 543         uint32_t i;
 544
 545         RTE_ASSERT(to != NULL && from != NULL);
 546         to->ipackets += from->ipackets;
 547         to->opackets += from->opackets;
 548         to->ibytes += from->ibytes;
 549         to->obytes += from->obytes;
 550         to->imissed += from->imissed;
 551         to->ierrors += from->ierrors;
 552         to->oerrors += from->oerrors;
 553         to->rx_nombuf += from->rx_nombuf;
 554         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS; i++) {
 555                 to->q_ipackets[i] += from->q_ipackets[i];
 556                 to->q_opackets[i] += from->q_opackets[i];
 557                 to->q_ibytes[i] += from->q_ibytes[i];
 558                 to->q_obytes[i] += from->q_obytes[i];
 559                 to->q_errors[i] += from->q_errors[i];
 560         }
 561 }
 562
 563 int
 564 failsafe_eth_rmv_event_callback(uint16_t port_id __rte_unused,
 565                                 enum rte_eth_event_type event __rte_unused,
 566                                 void *cb_arg, void *out __rte_unused)
 567 {
 568         struct sub_device *sdev = cb_arg;
 569
 570         fs_lock(fs_dev(sdev), 0);
 571         /* Switch as soon as possible tx_dev. */
 572         fs_switch_dev(fs_dev(sdev), sdev);
 573         /* Use safe bursts in any case. */
 574         failsafe_set_burst_fn(fs_dev(sdev), 1);
 575         /*
 576          * Async removal, the sub-PMD will try to unregister
 577          * the callback at the source of the current thread context.
 578          */
 579         sdev->remove = 1;
 580         fs_unlock(fs_dev(sdev), 0);
 581         return 0;
 582 }
 583
 584 int
 585 failsafe_eth_lsc_event_callback(uint16_t port_id __rte_unused,
 586                                 enum rte_eth_event_type event __rte_unused,
 587                                 void *cb_arg, void *out __rte_unused)
 588 {
 589         struct rte_eth_dev *dev = cb_arg;
 590         int ret;
 591
 592         ret = dev->dev_ops->link_update(dev, 0);
 593         /* We must pass on the LSC event */
 594         if (ret)
 595                 return _rte_eth_dev_callback_process(dev,
 596                                                      RTE_ETH_EVENT_INTR_LSC,
 597                                                      NULL);
 598         else
 599                 return 0;
 600 }
 601
 602 /* Take sub-device ownership before it becomes exposed to the application. */
 603 int
 604 failsafe_eth_new_event_callback(uint16_t port_id,
 605                                 enum rte_eth_event_type event __rte_unused,
 606                                 void *cb_arg, void *out __rte_unused)
 607 {
 608         struct rte_eth_dev *fs_dev = cb_arg;
 609         struct sub_device *sdev;
 610         struct rte_eth_dev *dev = &rte_eth_devices[port_id];
 611         uint8_t i;
 612
 613         FOREACH_SUBDEV_STATE(sdev, i, fs_dev, DEV_PARSED) {
 614                 if (sdev->state >= DEV_PROBED)
 615                         continue;
 616                 if (strcmp(sdev->devargs.name, dev->device->name) != 0)
 617                         continue;
 618                 rte_eth_dev_owner_set(port_id, &PRIV(fs_dev)->my_owner);
 619                 /* The actual owner will be checked after the port probing. */
 620                 break;
 621         }
 622         return 0;
 623 }