zfcp_fc.c revision b98478d71b0fea6d35f96069612d92b76013589f
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#define KMSG_COMPONENT "zfcp" 10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12#include "zfcp_ext.h" 13 14enum rscn_address_format { 15 RSCN_PORT_ADDRESS = 0x0, 16 RSCN_AREA_ADDRESS = 0x1, 17 RSCN_DOMAIN_ADDRESS = 0x2, 18 RSCN_FABRIC_ADDRESS = 0x3, 19}; 20 21static u32 rscn_range_mask[] = { 22 [RSCN_PORT_ADDRESS] = 0xFFFFFF, 23 [RSCN_AREA_ADDRESS] = 0xFFFF00, 24 [RSCN_DOMAIN_ADDRESS] = 0xFF0000, 25 [RSCN_FABRIC_ADDRESS] = 0x000000, 26}; 27 28struct ct_iu_gpn_ft_req { 29 struct ct_hdr header; 30 u8 flags; 31 u8 domain_id_scope; 32 u8 area_id_scope; 33 u8 fc4_type; 34} __attribute__ ((packed)); 35 36struct gpn_ft_resp_acc { 37 u8 control; 38 u8 port_id[3]; 39 u8 reserved[4]; 40 u64 wwpn; 41} __attribute__ ((packed)); 42 43#define ZFCP_GPN_FT_ENTRIES ((PAGE_SIZE - sizeof(struct ct_hdr)) \ 44 / sizeof(struct gpn_ft_resp_acc)) 45#define ZFCP_GPN_FT_BUFFERS 4 46#define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) 47 48struct ct_iu_gpn_ft_resp { 49 struct ct_hdr header; 50 struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; 51} __attribute__ ((packed)); 52 53struct zfcp_gpn_ft { 54 struct zfcp_send_ct ct; 55 struct scatterlist sg_req; 56 struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; 57}; 58 59struct zfcp_fc_ns_handler_data { 60 struct completion done; 61 void (*handler)(unsigned long); 62 unsigned long handler_data; 63}; 64 65static int zfcp_wka_port_get(struct zfcp_wka_port *wka_port) 66{ 67 if (mutex_lock_interruptible(&wka_port->mutex)) 68 return -ERESTARTSYS; 69 70 if (wka_port->status == ZFCP_WKA_PORT_OFFLINE || 71 wka_port->status == ZFCP_WKA_PORT_CLOSING) { 72 wka_port->status = ZFCP_WKA_PORT_OPENING; 73 if (zfcp_fsf_open_wka_port(wka_port)) 74 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 75 } 76 77 mutex_unlock(&wka_port->mutex); 78 79 wait_event_timeout( 80 wka_port->completion_wq, 81 wka_port->status == ZFCP_WKA_PORT_ONLINE || 82 wka_port->status == ZFCP_WKA_PORT_OFFLINE, 83 HZ >> 1); 84 85 if (wka_port->status == ZFCP_WKA_PORT_ONLINE) { 86 atomic_inc(&wka_port->refcount); 87 return 0; 88 } 89 return -EIO; 90} 91 92static void zfcp_wka_port_offline(struct work_struct *work) 93{ 94 struct delayed_work *dw = container_of(work, struct delayed_work, work); 95 struct zfcp_wka_port *wka_port = 96 container_of(dw, struct zfcp_wka_port, work); 97 98 wait_event(wka_port->completion_wq, 99 atomic_read(&wka_port->refcount) == 0); 100 101 mutex_lock(&wka_port->mutex); 102 if ((atomic_read(&wka_port->refcount) != 0) || 103 (wka_port->status != ZFCP_WKA_PORT_ONLINE)) 104 goto out; 105 106 wka_port->status = ZFCP_WKA_PORT_CLOSING; 107 if (zfcp_fsf_close_wka_port(wka_port)) { 108 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 109 wake_up(&wka_port->completion_wq); 110 } 111out: 112 mutex_unlock(&wka_port->mutex); 113} 114 115static void zfcp_wka_port_put(struct zfcp_wka_port *wka_port) 116{ 117 if (atomic_dec_return(&wka_port->refcount) != 0) 118 return; 119 /* wait 10 miliseconds, other reqs might pop in */ 120 schedule_delayed_work(&wka_port->work, HZ / 100); 121} 122 123void zfcp_fc_nameserver_init(struct zfcp_adapter *adapter) 124{ 125 struct zfcp_wka_port *wka_port = &adapter->nsp; 126 127 init_waitqueue_head(&wka_port->completion_wq); 128 129 wka_port->adapter = adapter; 130 wka_port->d_id = ZFCP_DID_DIRECTORY_SERVICE; 131 132 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 133 atomic_set(&wka_port->refcount, 0); 134 mutex_init(&wka_port->mutex); 135 INIT_DELAYED_WORK(&wka_port->work, zfcp_wka_port_offline); 136} 137 138static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 139 struct fcp_rscn_element *elem) 140{ 141 unsigned long flags; 142 struct zfcp_port *port; 143 144 read_lock_irqsave(&zfcp_data.config_lock, flags); 145 list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) { 146 if (!(atomic_read(&port->status) & ZFCP_STATUS_PORT_PHYS_OPEN)) 147 /* Try to connect to unused ports anyway. */ 148 zfcp_erp_port_reopen(port, 149 ZFCP_STATUS_COMMON_ERP_FAILED, 150 82, fsf_req); 151 else if ((port->d_id & range) == (elem->nport_did & range)) 152 /* Check connection status for connected ports */ 153 zfcp_test_link(port); 154 } 155 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 156} 157 158static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 159{ 160 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 161 struct fcp_rscn_head *fcp_rscn_head; 162 struct fcp_rscn_element *fcp_rscn_element; 163 u16 i; 164 u16 no_entries; 165 u32 range_mask; 166 167 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; 168 fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; 169 170 /* see FC-FS */ 171 no_entries = fcp_rscn_head->payload_len / 172 sizeof(struct fcp_rscn_element); 173 174 for (i = 1; i < no_entries; i++) { 175 /* skip head and start with 1st element */ 176 fcp_rscn_element++; 177 range_mask = rscn_range_mask[fcp_rscn_element->addr_format]; 178 _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); 179 } 180 schedule_work(&fsf_req->adapter->scan_work); 181} 182 183static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 184{ 185 struct zfcp_adapter *adapter = req->adapter; 186 struct zfcp_port *port; 187 unsigned long flags; 188 189 read_lock_irqsave(&zfcp_data.config_lock, flags); 190 list_for_each_entry(port, &adapter->port_list_head, list) 191 if (port->wwpn == wwpn) 192 break; 193 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 194 195 if (port && (port->wwpn == wwpn)) 196 zfcp_erp_port_forced_reopen(port, 0, 83, req); 197} 198 199static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 200{ 201 struct fsf_status_read_buffer *status_buffer = 202 (struct fsf_status_read_buffer *)req->data; 203 struct fsf_plogi *els_plogi = 204 (struct fsf_plogi *) status_buffer->payload.data; 205 206 zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); 207} 208 209static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 210{ 211 struct fsf_status_read_buffer *status_buffer = 212 (struct fsf_status_read_buffer *)req->data; 213 struct fcp_logo *els_logo = 214 (struct fcp_logo *) status_buffer->payload.data; 215 216 zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); 217} 218 219/** 220 * zfcp_fc_incoming_els - handle incoming ELS 221 * @fsf_req - request which contains incoming ELS 222 */ 223void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 224{ 225 struct fsf_status_read_buffer *status_buffer = 226 (struct fsf_status_read_buffer *) fsf_req->data; 227 unsigned int els_type = status_buffer->payload.data[0]; 228 229 zfcp_san_dbf_event_incoming_els(fsf_req); 230 if (els_type == LS_PLOGI) 231 zfcp_fc_incoming_plogi(fsf_req); 232 else if (els_type == LS_LOGO) 233 zfcp_fc_incoming_logo(fsf_req); 234 else if (els_type == LS_RSCN) 235 zfcp_fc_incoming_rscn(fsf_req); 236} 237 238static void zfcp_fc_ns_handler(unsigned long data) 239{ 240 struct zfcp_fc_ns_handler_data *compl_rec = 241 (struct zfcp_fc_ns_handler_data *) data; 242 243 if (compl_rec->handler) 244 compl_rec->handler(compl_rec->handler_data); 245 246 complete(&compl_rec->done); 247} 248 249static void zfcp_fc_ns_gid_pn_eval(unsigned long data) 250{ 251 struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; 252 struct zfcp_send_ct *ct = &gid_pn->ct; 253 struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); 254 struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); 255 struct zfcp_port *port = gid_pn->port; 256 257 if (ct->status) 258 return; 259 if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) { 260 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); 261 return; 262 } 263 /* paranoia */ 264 if (ct_iu_req->wwpn != port->wwpn) 265 return; 266 /* looks like a valid d_id */ 267 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; 268} 269 270int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action, 271 struct zfcp_gid_pn_data *gid_pn) 272{ 273 struct zfcp_adapter *adapter = erp_action->adapter; 274 struct zfcp_fc_ns_handler_data compl_rec; 275 int ret; 276 277 /* setup parameters for send generic command */ 278 gid_pn->port = erp_action->port; 279 gid_pn->ct.wka_port = &adapter->nsp; 280 gid_pn->ct.handler = zfcp_fc_ns_handler; 281 gid_pn->ct.handler_data = (unsigned long) &compl_rec; 282 gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; 283 gid_pn->ct.req = &gid_pn->req; 284 gid_pn->ct.resp = &gid_pn->resp; 285 gid_pn->ct.req_count = 1; 286 gid_pn->ct.resp_count = 1; 287 sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, 288 sizeof(struct ct_iu_gid_pn_req)); 289 sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, 290 sizeof(struct ct_iu_gid_pn_resp)); 291 292 /* setup nameserver request */ 293 gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; 294 gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 295 gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; 296 gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; 297 gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; 298 gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_MAX_SIZE; 299 gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn; 300 301 init_completion(&compl_rec.done); 302 compl_rec.handler = zfcp_fc_ns_gid_pn_eval; 303 compl_rec.handler_data = (unsigned long) gid_pn; 304 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, 305 erp_action); 306 if (!ret) 307 wait_for_completion(&compl_rec.done); 308 return ret; 309} 310 311/** 312 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 313 * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed 314 * return: -ENOMEM on error, 0 otherwise 315 */ 316int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action) 317{ 318 int ret; 319 struct zfcp_gid_pn_data *gid_pn; 320 struct zfcp_adapter *adapter = erp_action->adapter; 321 322 gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC); 323 if (!gid_pn) 324 return -ENOMEM; 325 326 memset(gid_pn, 0, sizeof(*gid_pn)); 327 328 ret = zfcp_wka_port_get(&adapter->nsp); 329 if (ret) 330 goto out; 331 332 ret = zfcp_fc_ns_gid_pn_request(erp_action, gid_pn); 333 334 zfcp_wka_port_put(&adapter->nsp); 335out: 336 mempool_free(gid_pn, adapter->pool.data_gid_pn); 337 return ret; 338} 339 340/** 341 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 342 * @port: zfcp_port structure 343 * @plogi: plogi payload 344 * 345 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 346 */ 347void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) 348{ 349 port->maxframe_size = plogi->serv_param.common_serv_param[7] | 350 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); 351 if (plogi->serv_param.class1_serv_param[0] & 0x80) 352 port->supported_classes |= FC_COS_CLASS1; 353 if (plogi->serv_param.class2_serv_param[0] & 0x80) 354 port->supported_classes |= FC_COS_CLASS2; 355 if (plogi->serv_param.class3_serv_param[0] & 0x80) 356 port->supported_classes |= FC_COS_CLASS3; 357 if (plogi->serv_param.class4_serv_param[0] & 0x80) 358 port->supported_classes |= FC_COS_CLASS4; 359} 360 361struct zfcp_els_adisc { 362 struct zfcp_send_els els; 363 struct scatterlist req; 364 struct scatterlist resp; 365 struct zfcp_ls_adisc ls_adisc; 366 struct zfcp_ls_adisc ls_adisc_acc; 367}; 368 369static void zfcp_fc_adisc_handler(unsigned long data) 370{ 371 struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; 372 struct zfcp_port *port = adisc->els.port; 373 struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc; 374 375 if (adisc->els.status) { 376 /* request rejected or timed out */ 377 zfcp_erp_port_forced_reopen(port, 0, 63, NULL); 378 goto out; 379 } 380 381 if (!port->wwnn) 382 port->wwnn = ls_adisc->wwnn; 383 384 if (port->wwpn != ls_adisc->wwpn) 385 zfcp_erp_port_reopen(port, 0, 64, NULL); 386 387 out: 388 zfcp_port_put(port); 389 kfree(adisc); 390} 391 392static int zfcp_fc_adisc(struct zfcp_port *port) 393{ 394 struct zfcp_els_adisc *adisc; 395 struct zfcp_adapter *adapter = port->adapter; 396 397 adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); 398 if (!adisc) 399 return -ENOMEM; 400 401 adisc->els.req = &adisc->req; 402 adisc->els.resp = &adisc->resp; 403 sg_init_one(adisc->els.req, &adisc->ls_adisc, 404 sizeof(struct zfcp_ls_adisc)); 405 sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, 406 sizeof(struct zfcp_ls_adisc)); 407 408 adisc->els.req_count = 1; 409 adisc->els.resp_count = 1; 410 adisc->els.adapter = adapter; 411 adisc->els.port = port; 412 adisc->els.d_id = port->d_id; 413 adisc->els.handler = zfcp_fc_adisc_handler; 414 adisc->els.handler_data = (unsigned long) adisc; 415 adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; 416 417 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports 418 without FC-AL-2 capability, so we don't set it */ 419 adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); 420 adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); 421 adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); 422 423 return zfcp_fsf_send_els(&adisc->els); 424} 425 426/** 427 * zfcp_test_link - lightweight link test procedure 428 * @port: port to be tested 429 * 430 * Test status of a link to a remote port using the ELS command ADISC. 431 * If there is a problem with the remote port, error recovery steps 432 * will be triggered. 433 */ 434void zfcp_test_link(struct zfcp_port *port) 435{ 436 int retval; 437 438 zfcp_port_get(port); 439 retval = zfcp_fc_adisc(port); 440 if (retval == 0) 441 return; 442 443 /* send of ADISC was not possible */ 444 zfcp_port_put(port); 445 if (retval != -EBUSY) 446 zfcp_erp_port_forced_reopen(port, 0, 65, NULL); 447} 448 449static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft) 450{ 451 struct scatterlist *sg = &gpn_ft->sg_req; 452 453 kfree(sg_virt(sg)); /* free request buffer */ 454 zfcp_sg_free_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS); 455 456 kfree(gpn_ft); 457} 458 459static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void) 460{ 461 struct zfcp_gpn_ft *gpn_ft; 462 struct ct_iu_gpn_ft_req *req; 463 464 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 465 if (!gpn_ft) 466 return NULL; 467 468 req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); 469 if (!req) { 470 kfree(gpn_ft); 471 gpn_ft = NULL; 472 goto out; 473 } 474 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 475 476 if (zfcp_sg_setup_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS)) { 477 zfcp_free_sg_env(gpn_ft); 478 gpn_ft = NULL; 479 } 480out: 481 return gpn_ft; 482} 483 484 485static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, 486 struct zfcp_adapter *adapter) 487{ 488 struct zfcp_send_ct *ct = &gpn_ft->ct; 489 struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 490 struct zfcp_fc_ns_handler_data compl_rec; 491 int ret; 492 493 /* prepare CT IU for GPN_FT */ 494 req->header.revision = ZFCP_CT_REVISION; 495 req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 496 req->header.gs_subtype = ZFCP_CT_NAME_SERVER; 497 req->header.options = ZFCP_CT_SYNCHRONOUS; 498 req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; 499 req->header.max_res_size = (sizeof(struct gpn_ft_resp_acc) * 500 (ZFCP_GPN_FT_MAX_ENTRIES - 1)) >> 2; 501 req->flags = 0; 502 req->domain_id_scope = 0; 503 req->area_id_scope = 0; 504 req->fc4_type = ZFCP_CT_SCSI_FCP; 505 506 /* prepare zfcp_send_ct */ 507 ct->wka_port = &adapter->nsp; 508 ct->handler = zfcp_fc_ns_handler; 509 ct->handler_data = (unsigned long)&compl_rec; 510 ct->timeout = 10; 511 ct->req = &gpn_ft->sg_req; 512 ct->resp = gpn_ft->sg_resp; 513 ct->req_count = 1; 514 ct->resp_count = ZFCP_GPN_FT_BUFFERS; 515 516 init_completion(&compl_rec.done); 517 compl_rec.handler = NULL; 518 ret = zfcp_fsf_send_ct(ct, NULL, NULL); 519 if (!ret) 520 wait_for_completion(&compl_rec.done); 521 return ret; 522} 523 524static void zfcp_validate_port(struct zfcp_port *port) 525{ 526 struct zfcp_adapter *adapter = port->adapter; 527 528 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 529 530 if ((port->supported_classes != 0) || 531 !list_empty(&port->unit_list_head)) { 532 zfcp_port_put(port); 533 return; 534 } 535 zfcp_erp_port_shutdown(port, 0, 151, NULL); 536 zfcp_erp_wait(adapter); 537 zfcp_port_put(port); 538 zfcp_port_dequeue(port); 539} 540 541static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft) 542{ 543 struct zfcp_send_ct *ct = &gpn_ft->ct; 544 struct scatterlist *sg = gpn_ft->sg_resp; 545 struct ct_hdr *hdr = sg_virt(sg); 546 struct gpn_ft_resp_acc *acc = sg_virt(sg); 547 struct zfcp_adapter *adapter = ct->wka_port->adapter; 548 struct zfcp_port *port, *tmp; 549 u32 d_id; 550 int ret = 0, x, last = 0; 551 552 if (ct->status) 553 return -EIO; 554 555 if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { 556 if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) 557 return -EAGAIN; /* might be a temporary condition */ 558 return -EIO; 559 } 560 561 if (hdr->max_res_size) 562 return -E2BIG; 563 564 down(&zfcp_data.config_sema); 565 566 /* first entry is the header */ 567 for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES && !last; x++) { 568 if (x % (ZFCP_GPN_FT_ENTRIES + 1)) 569 acc++; 570 else 571 acc = sg_virt(++sg); 572 573 last = acc->control & 0x80; 574 d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | 575 acc->port_id[2]; 576 577 /* don't attach ports with a well known address */ 578 if ((d_id & ZFCP_DID_WKA) == ZFCP_DID_WKA) 579 continue; 580 /* skip the adapter's port and known remote ports */ 581 if (acc->wwpn == fc_host_port_name(adapter->scsi_host)) 582 continue; 583 port = zfcp_get_port_by_wwpn(adapter, acc->wwpn); 584 if (port) { 585 zfcp_port_get(port); 586 continue; 587 } 588 589 port = zfcp_port_enqueue(adapter, acc->wwpn, 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 */ 608int zfcp_scan_ports(struct zfcp_adapter *adapter) 609{ 610 int ret, i; 611 struct zfcp_gpn_ft *gpn_ft; 612 613 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT) 614 return 0; 615 616 ret = zfcp_wka_port_get(&adapter->nsp); 617 if (ret) 618 return ret; 619 620 gpn_ft = zfcp_alloc_sg_env(); 621 if (!gpn_ft) { 622 ret = -ENOMEM; 623 goto out; 624 } 625 626 for (i = 0; i < 3; i++) { 627 ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter); 628 if (!ret) { 629 ret = zfcp_scan_eval_gpn_ft(gpn_ft); 630 if (ret == -EAGAIN) 631 ssleep(1); 632 else 633 break; 634 } 635 } 636 zfcp_free_sg_env(gpn_ft); 637out: 638 zfcp_wka_port_put(&adapter->nsp); 639 return ret; 640} 641 642 643void _zfcp_scan_ports_later(struct work_struct *work) 644{ 645 zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); 646} 647