SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/s390/scsi/zfcp_scsi.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Interface to Linux SCSI midlayer.
   5  *
   6  * Copyright IBM Corporation 2002, 2009
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include "zfcp_ext.h"
  13 #include <asm/atomic.h>
  14
  15 /* Find start of Sense Information in FCP response unit*/
  16 char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
  17 {
  18         char *fcp_sns_info_ptr;
  19
  20         fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1];
  21         if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)
  22                 fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len;
  23
  24         return fcp_sns_info_ptr;
  25 }
  26
  27 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
  28 {
  29         struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
  30         unit->device = NULL;
  31         zfcp_erp_unit_failed(unit, "scslvd1", NULL);
  32         zfcp_unit_put(unit);
  33 }
  34
  35 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
  36 {
  37         if (sdp->tagged_supported)
  38                 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32);
  39         else
  40                 scsi_adjust_queue_depth(sdp, 0, 1);
  41         return 0;
  42 }
  43
  44 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
  45 {
  46         set_host_byte(scpnt, result);
  47         if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
  48                 zfcp_scsi_dbf_event_result("fail", 4,
  49                         (struct zfcp_adapter*) scpnt->device->host->hostdata[0],
  50                         scpnt, NULL);
  51         /* return directly */
  52         scpnt->scsi_done(scpnt);
  53 }
  54
  55 static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
  56                                   void (*done) (struct scsi_cmnd *))
  57 {
  58         struct zfcp_unit *unit;
  59         struct zfcp_adapter *adapter;
  60         int    status, scsi_result, ret;
  61         struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
  62
  63         /* reset the status for this request */
  64         scpnt->result = 0;
  65         scpnt->host_scribble = NULL;
  66         scpnt->scsi_done = done;
  67
  68         /*
  69          * figure out adapter and target device
  70          * (stored there by zfcp_scsi_slave_alloc)
  71          */
  72         adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
  73         unit = scpnt->device->hostdata;
  74
  75         BUG_ON(!adapter || (adapter != unit->port->adapter));
  76         BUG_ON(!scpnt->scsi_done);
  77
  78         if (unlikely(!unit)) {
  79                 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
  80                 return 0;
  81         }
  82
  83         scsi_result = fc_remote_port_chkready(rport);
  84         if (unlikely(scsi_result)) {
  85                 scpnt->result = scsi_result;
  86                 zfcp_scsi_dbf_event_result("fail", 4, adapter, scpnt, NULL);
  87                 scpnt->scsi_done(scpnt);
  88                 return 0;
  89         }
  90
  91         status = atomic_read(&unit->status);
  92         if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
  93                      !(status & ZFCP_STATUS_COMMON_RUNNING))) {
  94                 zfcp_scsi_command_fail(scpnt, DID_ERROR);
  95                 return 0;;
  96         }
  97
  98         ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
  99         if (unlikely(ret == -EBUSY))
 100                 return SCSI_MLQUEUE_DEVICE_BUSY;
 101         else if (unlikely(ret < 0))
 102                 return SCSI_MLQUEUE_HOST_BUSY;
 103
 104         return ret;
 105 }
 106
 107 static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
 108                                           int channel, unsigned int id,
 109                                           unsigned int lun)
 110 {
 111         struct zfcp_port *port;
 112         struct zfcp_unit *unit;
 113         int scsi_lun;
 114
 115         list_for_each_entry(port, &adapter->port_list_head, list) {
 116                 if (!port->rport || (id != port->rport->scsi_target_id))
 117                         continue;
 118                 list_for_each_entry(unit, &port->unit_list_head, list) {
 119                         scsi_lun = scsilun_to_int(
 120                                 (struct scsi_lun *)&unit->fcp_lun);
 121                         if (lun == scsi_lun)
 122                                 return unit;
 123                 }
 124         }
 125
 126         return NULL;
 127 }
 128
 129 static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
 130 {
 131         struct zfcp_adapter *adapter;
 132         struct zfcp_unit *unit;
 133         unsigned long flags;
 134         int retval = -ENXIO;
 135
 136         adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
 137         if (!adapter)
 138                 goto out;
 139
 140         read_lock_irqsave(&zfcp_data.config_lock, flags);
 141         unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
 142         if (unit) {
 143                 sdp->hostdata = unit;
 144                 unit->device = sdp;
 145                 zfcp_unit_get(unit);
 146                 retval = 0;
 147         }
 148         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 149 out:
 150         return retval;
 151 }
 152
 153 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
 154 {
 155         struct Scsi_Host *scsi_host = scpnt->device->host;
 156         struct zfcp_adapter *adapter =
 157                 (struct zfcp_adapter *) scsi_host->hostdata[0];
 158         struct zfcp_unit *unit = scpnt->device->hostdata;
 159         struct zfcp_fsf_req *old_req, *abrt_req;
 160         unsigned long flags;
 161         unsigned long old_req_id = (unsigned long) scpnt->host_scribble;
 162         int retval = SUCCESS;
 163         int retry = 3;
 164
 165         /* avoid race condition between late normal completion and abort */
 166         write_lock_irqsave(&adapter->abort_lock, flags);
 167
 168         spin_lock(&adapter->req_list_lock);
 169         old_req = zfcp_reqlist_find(adapter, old_req_id);
 170         spin_unlock(&adapter->req_list_lock);
 171         if (!old_req) {
 172                 write_unlock_irqrestore(&adapter->abort_lock, flags);
 173                 zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL,
 174                                           old_req_id);
 175                 return SUCCESS;
 176         }
 177         old_req->data = NULL;
 178
 179         /* don't access old fsf_req after releasing the abort_lock */
 180         write_unlock_irqrestore(&adapter->abort_lock, flags);
 181
 182         while (retry--) {
 183                 abrt_req = zfcp_fsf_abort_fcp_command(old_req_id, unit);
 184                 if (abrt_req)
 185                         break;
 186
 187                 zfcp_erp_wait(adapter);
 188                 if (!(atomic_read(&adapter->status) &
 189                       ZFCP_STATUS_COMMON_RUNNING)) {
 190                         zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL,
 191                                                   old_req_id);
 192                         return SUCCESS;
 193                 }
 194         }
 195         if (!abrt_req)
 196                 return FAILED;
 197
 198         wait_event(abrt_req->completion_wq,
 199                    abrt_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
 200
 201         if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
 202                 zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, abrt_req, 0);
 203         else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
 204                 zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, abrt_req, 0);
 205         else {
 206                 zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, abrt_req, 0);
 207                 retval = FAILED;
 208         }
 209         zfcp_fsf_req_free(abrt_req);
 210         return retval;
 211 }
 212
 213 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
 214 {
 215         struct zfcp_unit *unit = scpnt->device->hostdata;
 216         struct zfcp_adapter *adapter = unit->port->adapter;
 217         struct zfcp_fsf_req *fsf_req;
 218         int retval = SUCCESS;
 219         int retry = 3;
 220
 221         while (retry--) {
 222                 fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
 223                 if (fsf_req)
 224                         break;
 225
 226                 zfcp_erp_wait(adapter);
 227                 if (!(atomic_read(&adapter->status) &
 228                       ZFCP_STATUS_COMMON_RUNNING)) {
 229                         zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit,
 230                                                      scpnt);
 231                         return SUCCESS;
 232                 }
 233         }
 234         if (!fsf_req)
 235                 return FAILED;
 236
 237         wait_event(fsf_req->completion_wq,
 238                    fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
 239
 240         if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
 241                 zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);
 242                 retval = FAILED;
 243         } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
 244                 zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt);
 245                 retval = FAILED;
 246         } else
 247                 zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
 248
 249         zfcp_fsf_req_free(fsf_req);
 250         return retval;
 251 }
 252
 253 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
 254 {
 255         return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET);
 256 }
 257
 258 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
 259 {
 260         return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET);
 261 }
 262
 263 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
 264 {
 265         struct zfcp_unit *unit = scpnt->device->hostdata;
 266         struct zfcp_adapter *adapter = unit->port->adapter;
 267
 268         zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
 269         zfcp_erp_wait(adapter);
 270
 271         return SUCCESS;
 272 }
 273
 274 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
 275 {
 276         struct ccw_dev_id dev_id;
 277
 278         if (adapter->scsi_host)
 279                 return 0;
 280
 281         ccw_device_get_id(adapter->ccw_device, &dev_id);
 282         /* register adapter as SCSI host with mid layer of SCSI stack */
 283         adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
 284                                              sizeof (struct zfcp_adapter *));
 285         if (!adapter->scsi_host) {
 286                 dev_err(&adapter->ccw_device->dev,
 287                         "Registering the FCP device with the "
 288                         "SCSI stack failed\n");
 289                 return -EIO;
 290         }
 291
 292         /* tell the SCSI stack some characteristics of this adapter */
 293         adapter->scsi_host->max_id = 1;
 294         adapter->scsi_host->max_lun = 1;
 295         adapter->scsi_host->max_channel = 0;
 296         adapter->scsi_host->unique_id = dev_id.devno;
 297         adapter->scsi_host->max_cmd_len = 255;
 298         adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
 299
 300         adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
 301
 302         if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
 303                 scsi_host_put(adapter->scsi_host);
 304                 return -EIO;
 305         }
 306
 307         return 0;
 308 }
 309
 310 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
 311 {
 312         struct Scsi_Host *shost;
 313         struct zfcp_port *port;
 314
 315         shost = adapter->scsi_host;
 316         if (!shost)
 317                 return;
 318
 319         read_lock_irq(&zfcp_data.config_lock);
 320         list_for_each_entry(port, &adapter->port_list_head, list)
 321                 if (port->rport)
 322                         port->rport = NULL;
 323
 324         read_unlock_irq(&zfcp_data.config_lock);
 325         fc_remove_host(shost);
 326         scsi_remove_host(shost);
 327         scsi_host_put(shost);
 328         adapter->scsi_host = NULL;
 329
 330         return;
 331 }
 332
 333 static struct fc_host_statistics*
 334 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
 335 {
 336         struct fc_host_statistics *fc_stats;
 337
 338         if (!adapter->fc_stats) {
 339                 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
 340                 if (!fc_stats)
 341                         return NULL;
 342                 adapter->fc_stats = fc_stats; /* freed in adater_dequeue */
 343         }
 344         memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
 345         return adapter->fc_stats;
 346 }
 347
 348 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
 349                                       struct fsf_qtcb_bottom_port *data,
 350                                       struct fsf_qtcb_bottom_port *old)
 351 {
 352         fc_stats->seconds_since_last_reset =
 353                 data->seconds_since_last_reset - old->seconds_since_last_reset;
 354         fc_stats->tx_frames = data->tx_frames - old->tx_frames;
 355         fc_stats->tx_words = data->tx_words - old->tx_words;
 356         fc_stats->rx_frames = data->rx_frames - old->rx_frames;
 357         fc_stats->rx_words = data->rx_words - old->rx_words;
 358         fc_stats->lip_count = data->lip - old->lip;
 359         fc_stats->nos_count = data->nos - old->nos;
 360         fc_stats->error_frames = data->error_frames - old->error_frames;
 361         fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
 362         fc_stats->link_failure_count = data->link_failure - old->link_failure;
 363         fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
 364         fc_stats->loss_of_signal_count =
 365                 data->loss_of_signal - old->loss_of_signal;
 366         fc_stats->prim_seq_protocol_err_count =
 367                 data->psp_error_counts - old->psp_error_counts;
 368         fc_stats->invalid_tx_word_count =
 369                 data->invalid_tx_words - old->invalid_tx_words;
 370         fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
 371         fc_stats->fcp_input_requests =
 372                 data->input_requests - old->input_requests;
 373         fc_stats->fcp_output_requests =
 374                 data->output_requests - old->output_requests;
 375         fc_stats->fcp_control_requests =
 376                 data->control_requests - old->control_requests;
 377         fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
 378         fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
 379 }
 380
 381 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
 382                                    struct fsf_qtcb_bottom_port *data)
 383 {
 384         fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
 385         fc_stats->tx_frames = data->tx_frames;
 386         fc_stats->tx_words = data->tx_words;
 387         fc_stats->rx_frames = data->rx_frames;
 388         fc_stats->rx_words = data->rx_words;
 389         fc_stats->lip_count = data->lip;
 390         fc_stats->nos_count = data->nos;
 391         fc_stats->error_frames = data->error_frames;
 392         fc_stats->dumped_frames = data->dumped_frames;
 393         fc_stats->link_failure_count = data->link_failure;
 394         fc_stats->loss_of_sync_count = data->loss_of_sync;
 395         fc_stats->loss_of_signal_count = data->loss_of_signal;
 396         fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
 397         fc_stats->invalid_tx_word_count = data->invalid_tx_words;
 398         fc_stats->invalid_crc_count = data->invalid_crcs;
 399         fc_stats->fcp_input_requests = data->input_requests;
 400         fc_stats->fcp_output_requests = data->output_requests;
 401         fc_stats->fcp_control_requests = data->control_requests;
 402         fc_stats->fcp_input_megabytes = data->input_mb;
 403         fc_stats->fcp_output_megabytes = data->output_mb;
 404 }
 405
 406 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
 407 {
 408         struct zfcp_adapter *adapter;
 409         struct fc_host_statistics *fc_stats;
 410         struct fsf_qtcb_bottom_port *data;
 411         int ret;
 412
 413         adapter = (struct zfcp_adapter *)host->hostdata[0];
 414         fc_stats = zfcp_init_fc_host_stats(adapter);
 415         if (!fc_stats)
 416                 return NULL;
 417
 418         data = kzalloc(sizeof(*data), GFP_KERNEL);
 419         if (!data)
 420                 return NULL;
 421
 422         ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
 423         if (ret) {
 424                 kfree(data);
 425                 return NULL;
 426         }
 427
 428         if (adapter->stats_reset &&
 429             ((jiffies/HZ - adapter->stats_reset) <
 430              data->seconds_since_last_reset))
 431                 zfcp_adjust_fc_host_stats(fc_stats, data,
 432                                           adapter->stats_reset_data);
 433         else
 434                 zfcp_set_fc_host_stats(fc_stats, data);
 435
 436         kfree(data);
 437         return fc_stats;
 438 }
 439
 440 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
 441 {
 442         struct zfcp_adapter *adapter;
 443         struct fsf_qtcb_bottom_port *data;
 444         int ret;
 445
 446         adapter = (struct zfcp_adapter *)shost->hostdata[0];
 447         data = kzalloc(sizeof(*data), GFP_KERNEL);
 448         if (!data)
 449                 return;
 450
 451         ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
 452         if (ret)
 453                 kfree(data);
 454         else {
 455                 adapter->stats_reset = jiffies/HZ;
 456                 kfree(adapter->stats_reset_data);
 457                 adapter->stats_reset_data = data; /* finally freed in
 458                                                      adapter_dequeue */
 459         }
 460 }
 461
 462 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
 463 {
 464         struct zfcp_adapter *adapter =
 465                 (struct zfcp_adapter *)shost->hostdata[0];
 466         int status = atomic_read(&adapter->status);
 467
 468         if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
 469             !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
 470                 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
 471         else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 472                 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
 473         else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
 474                 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
 475         else
 476                 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
 477 }
 478
 479 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
 480 {
 481         rport->dev_loss_tmo = timeout;
 482 }
 483
 484 /**
 485  * zfcp_scsi_dev_loss_tmo_callbk - Free any reference to rport
 486  * @rport: The rport that is about to be deleted.
 487  */
 488 static void zfcp_scsi_dev_loss_tmo_callbk(struct fc_rport *rport)
 489 {
 490         struct zfcp_port *port = rport->dd_data;
 491
 492         write_lock_irq(&zfcp_data.config_lock);
 493         port->rport = NULL;
 494         write_unlock_irq(&zfcp_data.config_lock);
 495 }
 496
 497 /**
 498  * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
 499  * @rport: The FC rport where to teminate I/O
 500  *
 501  * Abort all pending SCSI commands for a port by closing the
 502  * port. Using a reopen for avoids a conflict with a shutdown
 503  * overwriting a reopen.
 504  */
 505 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
 506 {
 507         struct zfcp_port *port = rport->dd_data;
 508
 509         zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
 510 }
 511
 512 static void zfcp_scsi_rport_register(struct zfcp_port *port)
 513 {
 514         struct fc_rport_identifiers ids;
 515         struct fc_rport *rport;
 516
 517         ids.node_name = port->wwnn;
 518         ids.port_name = port->wwpn;
 519         ids.port_id = port->d_id;
 520         ids.roles = FC_RPORT_ROLE_FCP_TARGET;
 521
 522         rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
 523         if (!rport) {
 524                 dev_err(&port->adapter->ccw_device->dev,
 525                         "Registering port 0x%016Lx failed\n",
 526                         (unsigned long long)port->wwpn);
 527                 return;
 528         }
 529
 530         rport->dd_data = port;
 531         rport->maxframe_size = port->maxframe_size;
 532         rport->supported_classes = port->supported_classes;
 533         port->rport = rport;
 534 }
 535
 536 static void zfcp_scsi_rport_block(struct zfcp_port *port)
 537 {
 538         if (port->rport)
 539                 fc_remote_port_delete(port->rport);
 540 }
 541
 542 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
 543 {
 544         zfcp_port_get(port);
 545         port->rport_task = RPORT_ADD;
 546
 547         if (!queue_work(zfcp_data.work_queue, &port->rport_work))
 548                 zfcp_port_put(port);
 549 }
 550
 551 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
 552 {
 553         zfcp_port_get(port);
 554         port->rport_task = RPORT_DEL;
 555
 556         if (!queue_work(zfcp_data.work_queue, &port->rport_work))
 557                 zfcp_port_put(port);
 558 }
 559
 560 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
 561 {
 562         struct zfcp_port *port;
 563
 564         list_for_each_entry(port, &adapter->port_list_head, list)
 565                 zfcp_scsi_schedule_rport_block(port);
 566 }
 567
 568 void zfcp_scsi_rport_work(struct work_struct *work)
 569 {
 570         struct zfcp_port *port = container_of(work, struct zfcp_port,
 571                                               rport_work);
 572
 573         while (port->rport_task) {
 574                 if (port->rport_task == RPORT_ADD) {
 575                         port->rport_task = RPORT_NONE;
 576                         zfcp_scsi_rport_register(port);
 577                 } else {
 578                         port->rport_task = RPORT_NONE;
 579                         zfcp_scsi_rport_block(port);
 580                 }
 581         }
 582
 583         zfcp_port_put(port);
 584 }
 585
 586
 587 struct fc_function_template zfcp_transport_functions = {
 588         .show_starget_port_id = 1,
 589         .show_starget_port_name = 1,
 590         .show_starget_node_name = 1,
 591         .show_rport_supported_classes = 1,
 592         .show_rport_maxframe_size = 1,
 593         .show_rport_dev_loss_tmo = 1,
 594         .show_host_node_name = 1,
 595         .show_host_port_name = 1,
 596         .show_host_permanent_port_name = 1,
 597         .show_host_supported_classes = 1,
 598         .show_host_supported_speeds = 1,
 599         .show_host_maxframe_size = 1,
 600         .show_host_serial_number = 1,
 601         .get_fc_host_stats = zfcp_get_fc_host_stats,
 602         .reset_fc_host_stats = zfcp_reset_fc_host_stats,
 603         .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
 604         .get_host_port_state = zfcp_get_host_port_state,
 605         .dev_loss_tmo_callbk = zfcp_scsi_dev_loss_tmo_callbk,
 606         .terminate_rport_io = zfcp_scsi_terminate_rport_io,
 607         .show_host_port_state = 1,
 608         /* no functions registered for following dynamic attributes but
 609            directly set by LLDD */
 610         .show_host_port_type = 1,
 611         .show_host_speed = 1,
 612         .show_host_port_id = 1,
 613         .disable_target_scan = 1,
 614 };
 615
 616 struct zfcp_data zfcp_data = {
 617         .scsi_host_template = {
 618                 .name                    = "zfcp",
 619                 .module                  = THIS_MODULE,
 620                 .proc_name               = "zfcp",
 621                 .slave_alloc             = zfcp_scsi_slave_alloc,
 622                 .slave_configure         = zfcp_scsi_slave_configure,
 623                 .slave_destroy           = zfcp_scsi_slave_destroy,
 624                 .queuecommand            = zfcp_scsi_queuecommand,
 625                 .eh_abort_handler        = zfcp_scsi_eh_abort_handler,
 626                 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
 627                 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
 628                 .eh_host_reset_handler   = zfcp_scsi_eh_host_reset_handler,
 629                 .can_queue               = 4096,
 630                 .this_id                 = -1,
 631                 .sg_tablesize            = ZFCP_MAX_SBALES_PER_REQ,
 632                 .cmd_per_lun             = 1,
 633                 .use_clustering          = 1,
 634                 .sdev_attrs              = zfcp_sysfs_sdev_attrs,
 635                 .max_sectors             = (ZFCP_MAX_SBALES_PER_REQ * 8),
 636                 .shost_attrs             = zfcp_sysfs_shost_attrs,
 637         },
 638 };