1 /* 2 * zfcp device driver 3 * 4 * Fibre Channel related functions for the zfcp device driver. 5 * 6 * Copyright IBM Corporation 2008 7 */ 8 9 #include "zfcp_ext.h" 10 11 struct ct_iu_gpn_ft_req { 12 struct ct_hdr header; 13 u8 flags; 14 u8 domain_id_scope; 15 u8 area_id_scope; 16 u8 fc4_type; 17 } __attribute__ ((packed)); 18 19 struct gpn_ft_resp_acc { 20 u8 control; 21 u8 port_id[3]; 22 u8 reserved[4]; 23 u64 wwpn; 24 } __attribute__ ((packed)); 25 26 #define ZFCP_GPN_FT_ENTRIES ((PAGE_SIZE - sizeof(struct ct_hdr)) \ 27 / sizeof(struct gpn_ft_resp_acc)) 28 #define ZFCP_GPN_FT_BUFFERS 4 29 #define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) 30 31 struct ct_iu_gpn_ft_resp { 32 struct ct_hdr header; 33 struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; 34 } __attribute__ ((packed)); 35 36 struct zfcp_gpn_ft { 37 struct zfcp_send_ct ct; 38 struct scatterlist sg_req; 39 struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; 40 }; 41 42 struct zfcp_fc_ns_handler_data { 43 struct completion done; 44 void (*handler)(unsigned long); 45 unsigned long handler_data; 46 }; 47 48 static int zfcp_wka_port_get(struct zfcp_wka_port *wka_port) 49 { 50 if (mutex_lock_interruptible(&wka_port->mutex)) 51 return -ERESTARTSYS; 52 53 if (wka_port->status != ZFCP_WKA_PORT_ONLINE) { 54 wka_port->status = ZFCP_WKA_PORT_OPENING; 55 if (zfcp_fsf_open_wka_port(wka_port)) 56 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 57 } 58 59 mutex_unlock(&wka_port->mutex); 60 61 wait_event_timeout( 62 wka_port->completion_wq, 63 wka_port->status == ZFCP_WKA_PORT_ONLINE || 64 wka_port->status == ZFCP_WKA_PORT_OFFLINE, 65 HZ >> 1); 66 67 if (wka_port->status == ZFCP_WKA_PORT_ONLINE) { 68 atomic_inc(&wka_port->refcount); 69 return 0; 70 } 71 return -EIO; 72 } 73 74 static void zfcp_wka_port_offline(struct work_struct *work) 75 { 76 struct delayed_work *dw = container_of(work, struct delayed_work, work); 77 struct zfcp_wka_port *wka_port = 78 container_of(dw, struct zfcp_wka_port, work); 79 80 wait_event(wka_port->completion_wq, 81 atomic_read(&wka_port->refcount) == 0); 82 83 mutex_lock(&wka_port->mutex); 84 if ((atomic_read(&wka_port->refcount) != 0) || 85 (wka_port->status != ZFCP_WKA_PORT_ONLINE)) 86 goto out; 87 88 wka_port->status = ZFCP_WKA_PORT_CLOSING; 89 if (zfcp_fsf_close_wka_port(wka_port)) { 90 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 91 wake_up(&wka_port->completion_wq); 92 } 93 out: 94 mutex_unlock(&wka_port->mutex); 95 } 96 97 static void zfcp_wka_port_put(struct zfcp_wka_port *wka_port) 98 { 99 if (atomic_dec_return(&wka_port->refcount) != 0) 100 return; 101 /* wait 10 miliseconds, other reqs might pop in */ 102 schedule_delayed_work(&wka_port->work, HZ / 100); 103 } 104 105 void zfcp_fc_nameserver_init(struct zfcp_adapter *adapter) 106 { 107 struct zfcp_wka_port *wka_port = &adapter->nsp; 108 109 init_waitqueue_head(&wka_port->completion_wq); 110 111 wka_port->adapter = adapter; 112 wka_port->d_id = ZFCP_DID_DIRECTORY_SERVICE; 113 114 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 115 atomic_set(&wka_port->refcount, 0); 116 mutex_init(&wka_port->mutex); 117 INIT_DELAYED_WORK(&wka_port->work, zfcp_wka_port_offline); 118 } 119 120 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 121 struct fcp_rscn_element *elem) 122 { 123 unsigned long flags; 124 struct zfcp_port *port; 125 126 read_lock_irqsave(&zfcp_data.config_lock, flags); 127 list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) { 128 /* FIXME: ZFCP_STATUS_PORT_DID_DID check is racy */ 129 if (!(atomic_read(&port->status) & ZFCP_STATUS_PORT_DID_DID)) 130 /* Try to connect to unused ports anyway. */ 131 zfcp_erp_port_reopen(port, 132 ZFCP_STATUS_COMMON_ERP_FAILED, 133 82, fsf_req); 134 else if ((port->d_id & range) == (elem->nport_did & range)) 135 /* Check connection status for connected ports */ 136 zfcp_test_link(port); 137 } 138 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 139 } 140 141 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 142 { 143 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 144 struct fcp_rscn_head *fcp_rscn_head; 145 struct fcp_rscn_element *fcp_rscn_element; 146 u16 i; 147 u16 no_entries; 148 u32 range_mask; 149 150 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; 151 fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; 152 153 /* see FC-FS */ 154 no_entries = fcp_rscn_head->payload_len / 155 sizeof(struct fcp_rscn_element); 156 157 for (i = 1; i < no_entries; i++) { 158 /* skip head and start with 1st element */ 159 fcp_rscn_element++; 160 switch (fcp_rscn_element->addr_format) { 161 case ZFCP_PORT_ADDRESS: 162 range_mask = ZFCP_PORTS_RANGE_PORT; 163 break; 164 case ZFCP_AREA_ADDRESS: 165 range_mask = ZFCP_PORTS_RANGE_AREA; 166 break; 167 case ZFCP_DOMAIN_ADDRESS: 168 range_mask = ZFCP_PORTS_RANGE_DOMAIN; 169 break; 170 case ZFCP_FABRIC_ADDRESS: 171 range_mask = ZFCP_PORTS_RANGE_FABRIC; 172 break; 173 default: 174 continue; 175 } 176 _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); 177 } 178 schedule_work(&fsf_req->adapter->scan_work); 179 } 180 181 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 182 { 183 struct zfcp_adapter *adapter = req->adapter; 184 struct zfcp_port *port; 185 unsigned long flags; 186 187 read_lock_irqsave(&zfcp_data.config_lock, flags); 188 list_for_each_entry(port, &adapter->port_list_head, list) 189 if (port->wwpn == wwpn) 190 break; 191 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 192 193 if (port && (port->wwpn == wwpn)) 194 zfcp_erp_port_forced_reopen(port, 0, 83, req); 195 } 196 197 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 198 { 199 struct fsf_status_read_buffer *status_buffer = 200 (struct fsf_status_read_buffer *)req->data; 201 struct fsf_plogi *els_plogi = 202 (struct fsf_plogi *) status_buffer->payload.data; 203 204 zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); 205 } 206 207 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 208 { 209 struct fsf_status_read_buffer *status_buffer = 210 (struct fsf_status_read_buffer *)req->data; 211 struct fcp_logo *els_logo = 212 (struct fcp_logo *) status_buffer->payload.data; 213 214 zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); 215 } 216 217 /** 218 * zfcp_fc_incoming_els - handle incoming ELS 219 * @fsf_req - request which contains incoming ELS 220 */ 221 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 222 { 223 struct fsf_status_read_buffer *status_buffer = 224 (struct fsf_status_read_buffer *) fsf_req->data; 225 unsigned int els_type = status_buffer->payload.data[0]; 226 227 zfcp_san_dbf_event_incoming_els(fsf_req); 228 if (els_type == LS_PLOGI) 229 zfcp_fc_incoming_plogi(fsf_req); 230 else if (els_type == LS_LOGO) 231 zfcp_fc_incoming_logo(fsf_req); 232 else if (els_type == LS_RSCN) 233 zfcp_fc_incoming_rscn(fsf_req); 234 } 235 236 static void zfcp_fc_ns_handler(unsigned long data) 237 { 238 struct zfcp_fc_ns_handler_data *compl_rec = 239 (struct zfcp_fc_ns_handler_data *) data; 240 241 if (compl_rec->handler) 242 compl_rec->handler(compl_rec->handler_data); 243 244 complete(&compl_rec->done); 245 } 246 247 static void zfcp_fc_ns_gid_pn_eval(unsigned long data) 248 { 249 struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; 250 struct zfcp_send_ct *ct = &gid_pn->ct; 251 struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); 252 struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); 253 struct zfcp_port *port = gid_pn->port; 254 255 if (ct->status) 256 return; 257 if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) { 258 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); 259 return; 260 } 261 /* paranoia */ 262 if (ct_iu_req->wwpn != port->wwpn) 263 return; 264 /* looks like a valid d_id */ 265 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; 266 atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); 267 } 268 269 int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action, 270 struct zfcp_gid_pn_data *gid_pn) 271 { 272 struct zfcp_adapter *adapter = erp_action->adapter; 273 struct zfcp_fc_ns_handler_data compl_rec; 274 int ret; 275 276 /* setup parameters for send generic command */ 277 gid_pn->port = erp_action->port; 278 gid_pn->ct.wka_port = &adapter->nsp; 279 gid_pn->ct.handler = zfcp_fc_ns_handler; 280 gid_pn->ct.handler_data = (unsigned long) &compl_rec; 281 gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; 282 gid_pn->ct.req = &gid_pn->req; 283 gid_pn->ct.resp = &gid_pn->resp; 284 gid_pn->ct.req_count = 1; 285 gid_pn->ct.resp_count = 1; 286 sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, 287 sizeof(struct ct_iu_gid_pn_req)); 288 sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, 289 sizeof(struct ct_iu_gid_pn_resp)); 290 291 /* setup nameserver request */ 292 gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; 293 gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 294 gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; 295 gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; 296 gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; 297 gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_MAX_SIZE; 298 gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn; 299 300 init_completion(&compl_rec.done); 301 compl_rec.handler = zfcp_fc_ns_gid_pn_eval; 302 compl_rec.handler_data = (unsigned long) gid_pn; 303 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, 304 erp_action); 305 if (!ret) 306 wait_for_completion(&compl_rec.done); 307 return ret; 308 } 309 310 /** 311 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 312 * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed 313 * return: -ENOMEM on error, 0 otherwise 314 */ 315 int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action) 316 { 317 int ret; 318 struct zfcp_gid_pn_data *gid_pn; 319 struct zfcp_adapter *adapter = erp_action->adapter; 320 321 gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC); 322 if (!gid_pn) 323 return -ENOMEM; 324 325 memset(gid_pn, 0, sizeof(*gid_pn)); 326 327 ret = zfcp_wka_port_get(&adapter->nsp); 328 if (ret) 329 goto out; 330 331 ret = zfcp_fc_ns_gid_pn_request(erp_action, gid_pn); 332 333 zfcp_wka_port_put(&adapter->nsp); 334 out: 335 mempool_free(gid_pn, adapter->pool.data_gid_pn); 336 return ret; 337 } 338 339 /** 340 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 341 * @port: zfcp_port structure 342 * @plogi: plogi payload 343 * 344 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 345 */ 346 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) 347 { 348 port->maxframe_size = plogi->serv_param.common_serv_param[7] | 349 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); 350 if (plogi->serv_param.class1_serv_param[0] & 0x80) 351 port->supported_classes |= FC_COS_CLASS1; 352 if (plogi->serv_param.class2_serv_param[0] & 0x80) 353 port->supported_classes |= FC_COS_CLASS2; 354 if (plogi->serv_param.class3_serv_param[0] & 0x80) 355 port->supported_classes |= FC_COS_CLASS3; 356 if (plogi->serv_param.class4_serv_param[0] & 0x80) 357 port->supported_classes |= FC_COS_CLASS4; 358 } 359 360 struct zfcp_els_adisc { 361 struct zfcp_send_els els; 362 struct scatterlist req; 363 struct scatterlist resp; 364 struct zfcp_ls_adisc ls_adisc; 365 struct zfcp_ls_adisc ls_adisc_acc; 366 }; 367 368 static void zfcp_fc_adisc_handler(unsigned long data) 369 { 370 struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; 371 struct zfcp_port *port = adisc->els.port; 372 struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc; 373 374 if (adisc->els.status) { 375 /* request rejected or timed out */ 376 zfcp_erp_port_forced_reopen(port, 0, 63, NULL); 377 goto out; 378 } 379 380 if (!port->wwnn) 381 port->wwnn = ls_adisc->wwnn; 382 383 if (port->wwpn != ls_adisc->wwpn) 384 zfcp_erp_port_reopen(port, 0, 64, NULL); 385 386 out: 387 zfcp_port_put(port); 388 kfree(adisc); 389 } 390 391 static int zfcp_fc_adisc(struct zfcp_port *port) 392 { 393 struct zfcp_els_adisc *adisc; 394 struct zfcp_adapter *adapter = port->adapter; 395 396 adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); 397 if (!adisc) 398 return -ENOMEM; 399 400 adisc->els.req = &adisc->req; 401 adisc->els.resp = &adisc->resp; 402 sg_init_one(adisc->els.req, &adisc->ls_adisc, 403 sizeof(struct zfcp_ls_adisc)); 404 sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, 405 sizeof(struct zfcp_ls_adisc)); 406 407 adisc->els.req_count = 1; 408 adisc->els.resp_count = 1; 409 adisc->els.adapter = adapter; 410 adisc->els.port = port; 411 adisc->els.d_id = port->d_id; 412 adisc->els.handler = zfcp_fc_adisc_handler; 413 adisc->els.handler_data = (unsigned long) adisc; 414 adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; 415 416 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports 417 without FC-AL-2 capability, so we don't set it */ 418 adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); 419 adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); 420 adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); 421 422 return zfcp_fsf_send_els(&adisc->els); 423 } 424 425 /** 426 * zfcp_test_link - lightweight link test procedure 427 * @port: port to be tested 428 * 429 * Test status of a link to a remote port using the ELS command ADISC. 430 * If there is a problem with the remote port, error recovery steps 431 * will be triggered. 432 */ 433 void zfcp_test_link(struct zfcp_port *port) 434 { 435 int retval; 436 437 zfcp_port_get(port); 438 retval = zfcp_fc_adisc(port); 439 if (retval == 0) 440 return; 441 442 /* send of ADISC was not possible */ 443 zfcp_port_put(port); 444 if (retval != -EBUSY) 445 zfcp_erp_port_forced_reopen(port, 0, 65, NULL); 446 } 447 448 static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft) 449 { 450 struct scatterlist *sg = &gpn_ft->sg_req; 451 452 kfree(sg_virt(sg)); /* free request buffer */ 453 zfcp_sg_free_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS); 454 455 kfree(gpn_ft); 456 } 457 458 static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void) 459 { 460 struct zfcp_gpn_ft *gpn_ft; 461 struct ct_iu_gpn_ft_req *req; 462 463 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 464 if (!gpn_ft) 465 return NULL; 466 467 req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); 468 if (!req) { 469 kfree(gpn_ft); 470 gpn_ft = NULL; 471 goto out; 472 } 473 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 474 475 if (zfcp_sg_setup_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS)) { 476 zfcp_free_sg_env(gpn_ft); 477 gpn_ft = NULL; 478 } 479 out: 480 return gpn_ft; 481 } 482 483 484 static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, 485 struct zfcp_adapter *adapter) 486 { 487 struct zfcp_send_ct *ct = &gpn_ft->ct; 488 struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 489 struct zfcp_fc_ns_handler_data compl_rec; 490 int ret; 491 492 /* prepare CT IU for GPN_FT */ 493 req->header.revision = ZFCP_CT_REVISION; 494 req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 495 req->header.gs_subtype = ZFCP_CT_NAME_SERVER; 496 req->header.options = ZFCP_CT_SYNCHRONOUS; 497 req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; 498 req->header.max_res_size = (sizeof(struct gpn_ft_resp_acc) * 499 (ZFCP_GPN_FT_MAX_ENTRIES - 1)) >> 2; 500 req->flags = 0; 501 req->domain_id_scope = 0; 502 req->area_id_scope = 0; 503 req->fc4_type = ZFCP_CT_SCSI_FCP; 504 505 /* prepare zfcp_send_ct */ 506 ct->wka_port = &adapter->nsp; 507 ct->handler = zfcp_fc_ns_handler; 508 ct->handler_data = (unsigned long)&compl_rec; 509 ct->timeout = 10; 510 ct->req = &gpn_ft->sg_req; 511 ct->resp = gpn_ft->sg_resp; 512 ct->req_count = 1; 513 ct->resp_count = ZFCP_GPN_FT_BUFFERS; 514 515 init_completion(&compl_rec.done); 516 compl_rec.handler = NULL; 517 ret = zfcp_fsf_send_ct(ct, NULL, NULL); 518 if (!ret) 519 wait_for_completion(&compl_rec.done); 520 return ret; 521 } 522 523 static void zfcp_validate_port(struct zfcp_port *port) 524 { 525 struct zfcp_adapter *adapter = port->adapter; 526 527 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 528 529 if ((port->supported_classes != 0) || 530 !list_empty(&port->unit_list_head)) { 531 zfcp_port_put(port); 532 return; 533 } 534 zfcp_erp_port_shutdown(port, 0, 151, NULL); 535 zfcp_erp_wait(adapter); 536 zfcp_port_put(port); 537 zfcp_port_dequeue(port); 538 } 539 540 static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft) 541 { 542 struct zfcp_send_ct *ct = &gpn_ft->ct; 543 struct scatterlist *sg = gpn_ft->sg_resp; 544 struct ct_hdr *hdr = sg_virt(sg); 545 struct gpn_ft_resp_acc *acc = sg_virt(sg); 546 struct zfcp_adapter *adapter = ct->wka_port->adapter; 547 struct zfcp_port *port, *tmp; 548 u32 d_id; 549 int ret = 0, x, last = 0; 550 551 if (ct->status) 552 return -EIO; 553 554 if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { 555 if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) 556 return -EAGAIN; /* might be a temporary condition */ 557 return -EIO; 558 } 559 560 if (hdr->max_res_size) 561 return -E2BIG; 562 563 down(&zfcp_data.config_sema); 564 565 /* first entry is the header */ 566 for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES && !last; x++) { 567 if (x % (ZFCP_GPN_FT_ENTRIES + 1)) 568 acc++; 569 else 570 acc = sg_virt(++sg); 571 572 last = acc->control & 0x80; 573 d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | 574 acc->port_id[2]; 575 576 /* don't attach ports with a well known address */ 577 if ((d_id & ZFCP_DID_WKA) == ZFCP_DID_WKA) 578 continue; 579 /* skip the adapter's port and known remote ports */ 580 if (acc->wwpn == fc_host_port_name(adapter->scsi_host)) 581 continue; 582 port = zfcp_get_port_by_wwpn(adapter, acc->wwpn); 583 if (port) { 584 zfcp_port_get(port); 585 continue; 586 } 587 588 port = zfcp_port_enqueue(adapter, acc->wwpn, 589 ZFCP_STATUS_PORT_DID_DID | 590 ZFCP_STATUS_COMMON_NOESC, d_id); 591 if (IS_ERR(port)) 592 ret = PTR_ERR(port); 593 else 594 zfcp_erp_port_reopen(port, 0, 149, NULL); 595 } 596 597 zfcp_erp_wait(adapter); 598 list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list) 599 zfcp_validate_port(port); 600 up(&zfcp_data.config_sema); 601 return ret; 602 } 603 604 /** 605 * zfcp_scan_ports - scan remote ports and attach new ports 606 * @adapter: pointer to struct zfcp_adapter 607 */ 608 int zfcp_scan_ports(struct zfcp_adapter *adapter) 609 { 610 int ret, i; 611 struct zfcp_gpn_ft *gpn_ft; 612 613 zfcp_erp_wait(adapter); /* wait until adapter is finished with ERP */ 614 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT) 615 return 0; 616 617 ret = zfcp_wka_port_get(&adapter->nsp); 618 if (ret) 619 return ret; 620 621 gpn_ft = zfcp_alloc_sg_env(); 622 if (!gpn_ft) { 623 ret = -ENOMEM; 624 goto out; 625 } 626 627 for (i = 0; i < 3; i++) { 628 ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter); 629 if (!ret) { 630 ret = zfcp_scan_eval_gpn_ft(gpn_ft); 631 if (ret == -EAGAIN) 632 ssleep(1); 633 else 634 break; 635 } 636 } 637 zfcp_free_sg_env(gpn_ft); 638 out: 639 zfcp_wka_port_put(&adapter->nsp); 640 return ret; 641 } 642 643 644 void _zfcp_scan_ports_later(struct work_struct *work) 645 { 646 zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); 647 } 648