1 /* 2 * zfcp device driver 3 * 4 * Fibre Channel related functions for the zfcp device driver. 5 * 6 * Copyright IBM Corporation 2008, 2010 7 */ 8 9 #define KMSG_COMPONENT "zfcp" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/types.h> 13 #include <scsi/fc/fc_els.h> 14 #include <scsi/libfc.h> 15 #include "zfcp_ext.h" 16 #include "zfcp_fc.h" 17 18 static u32 zfcp_fc_rscn_range_mask[] = { 19 [ELS_ADDR_FMT_PORT] = 0xFFFFFF, 20 [ELS_ADDR_FMT_AREA] = 0xFFFF00, 21 [ELS_ADDR_FMT_DOM] = 0xFF0000, 22 [ELS_ADDR_FMT_FAB] = 0x000000, 23 }; 24 25 static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port) 26 { 27 if (mutex_lock_interruptible(&wka_port->mutex)) 28 return -ERESTARTSYS; 29 30 if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE || 31 wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) { 32 wka_port->status = ZFCP_FC_WKA_PORT_OPENING; 33 if (zfcp_fsf_open_wka_port(wka_port)) 34 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 35 } 36 37 mutex_unlock(&wka_port->mutex); 38 39 wait_event(wka_port->completion_wq, 40 wka_port->status == ZFCP_FC_WKA_PORT_ONLINE || 41 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE); 42 43 if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) { 44 atomic_inc(&wka_port->refcount); 45 return 0; 46 } 47 return -EIO; 48 } 49 50 static void zfcp_fc_wka_port_offline(struct work_struct *work) 51 { 52 struct delayed_work *dw = to_delayed_work(work); 53 struct zfcp_fc_wka_port *wka_port = 54 container_of(dw, struct zfcp_fc_wka_port, work); 55 56 mutex_lock(&wka_port->mutex); 57 if ((atomic_read(&wka_port->refcount) != 0) || 58 (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE)) 59 goto out; 60 61 wka_port->status = ZFCP_FC_WKA_PORT_CLOSING; 62 if (zfcp_fsf_close_wka_port(wka_port)) { 63 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 64 wake_up(&wka_port->completion_wq); 65 } 66 out: 67 mutex_unlock(&wka_port->mutex); 68 } 69 70 static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port) 71 { 72 if (atomic_dec_return(&wka_port->refcount) != 0) 73 return; 74 /* wait 10 milliseconds, other reqs might pop in */ 75 schedule_delayed_work(&wka_port->work, HZ / 100); 76 } 77 78 static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id, 79 struct zfcp_adapter *adapter) 80 { 81 init_waitqueue_head(&wka_port->completion_wq); 82 83 wka_port->adapter = adapter; 84 wka_port->d_id = d_id; 85 86 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 87 atomic_set(&wka_port->refcount, 0); 88 mutex_init(&wka_port->mutex); 89 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); 90 } 91 92 static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka) 93 { 94 cancel_delayed_work_sync(&wka->work); 95 mutex_lock(&wka->mutex); 96 wka->status = ZFCP_FC_WKA_PORT_OFFLINE; 97 mutex_unlock(&wka->mutex); 98 } 99 100 void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs) 101 { 102 if (!gs) 103 return; 104 zfcp_fc_wka_port_force_offline(&gs->ms); 105 zfcp_fc_wka_port_force_offline(&gs->ts); 106 zfcp_fc_wka_port_force_offline(&gs->ds); 107 zfcp_fc_wka_port_force_offline(&gs->as); 108 } 109 110 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 111 struct fc_els_rscn_page *page) 112 { 113 unsigned long flags; 114 struct zfcp_adapter *adapter = fsf_req->adapter; 115 struct zfcp_port *port; 116 117 read_lock_irqsave(&adapter->port_list_lock, flags); 118 list_for_each_entry(port, &adapter->port_list, list) { 119 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) 120 zfcp_fc_test_link(port); 121 if (!port->d_id) 122 zfcp_erp_port_reopen(port, 123 ZFCP_STATUS_COMMON_ERP_FAILED, 124 "fcrscn1", NULL); 125 } 126 read_unlock_irqrestore(&adapter->port_list_lock, flags); 127 } 128 129 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 130 { 131 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 132 struct fc_els_rscn *head; 133 struct fc_els_rscn_page *page; 134 u16 i; 135 u16 no_entries; 136 unsigned int afmt; 137 138 head = (struct fc_els_rscn *) status_buffer->payload.data; 139 page = (struct fc_els_rscn_page *) head; 140 141 /* see FC-FS */ 142 no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page); 143 144 for (i = 1; i < no_entries; i++) { 145 /* skip head and start with 1st element */ 146 page++; 147 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; 148 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], 149 page); 150 } 151 queue_work(fsf_req->adapter->work_queue, &fsf_req->adapter->scan_work); 152 } 153 154 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 155 { 156 unsigned long flags; 157 struct zfcp_adapter *adapter = req->adapter; 158 struct zfcp_port *port; 159 160 read_lock_irqsave(&adapter->port_list_lock, flags); 161 list_for_each_entry(port, &adapter->port_list, list) 162 if (port->wwpn == wwpn) { 163 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); 164 break; 165 } 166 read_unlock_irqrestore(&adapter->port_list_lock, flags); 167 } 168 169 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 170 { 171 struct fsf_status_read_buffer *status_buffer; 172 struct fc_els_flogi *plogi; 173 174 status_buffer = (struct fsf_status_read_buffer *) req->data; 175 plogi = (struct fc_els_flogi *) status_buffer->payload.data; 176 zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn); 177 } 178 179 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 180 { 181 struct fsf_status_read_buffer *status_buffer = 182 (struct fsf_status_read_buffer *)req->data; 183 struct fc_els_logo *logo = 184 (struct fc_els_logo *) status_buffer->payload.data; 185 186 zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn); 187 } 188 189 /** 190 * zfcp_fc_incoming_els - handle incoming ELS 191 * @fsf_req - request which contains incoming ELS 192 */ 193 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 194 { 195 struct fsf_status_read_buffer *status_buffer = 196 (struct fsf_status_read_buffer *) fsf_req->data; 197 unsigned int els_type = status_buffer->payload.data[0]; 198 199 zfcp_dbf_san_incoming_els(fsf_req); 200 if (els_type == ELS_PLOGI) 201 zfcp_fc_incoming_plogi(fsf_req); 202 else if (els_type == ELS_LOGO) 203 zfcp_fc_incoming_logo(fsf_req); 204 else if (els_type == ELS_RSCN) 205 zfcp_fc_incoming_rscn(fsf_req); 206 } 207 208 static void zfcp_fc_ns_gid_pn_eval(void *data) 209 { 210 struct zfcp_fc_gid_pn *gid_pn = data; 211 struct zfcp_fsf_ct_els *ct = &gid_pn->ct; 212 struct zfcp_fc_gid_pn_req *gid_pn_req = sg_virt(ct->req); 213 struct zfcp_fc_gid_pn_resp *gid_pn_resp = sg_virt(ct->resp); 214 struct zfcp_port *port = gid_pn->port; 215 216 if (ct->status) 217 return; 218 if (gid_pn_resp->ct_hdr.ct_cmd != FC_FS_ACC) 219 return; 220 221 /* paranoia */ 222 if (gid_pn_req->gid_pn.fn_wwpn != port->wwpn) 223 return; 224 /* looks like a valid d_id */ 225 port->d_id = ntoh24(gid_pn_resp->gid_pn.fp_fid); 226 } 227 228 static void zfcp_fc_complete(void *data) 229 { 230 complete(data); 231 } 232 233 static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, 234 struct zfcp_fc_gid_pn *gid_pn) 235 { 236 struct zfcp_adapter *adapter = port->adapter; 237 DECLARE_COMPLETION_ONSTACK(completion); 238 int ret; 239 240 /* setup parameters for send generic command */ 241 gid_pn->port = port; 242 gid_pn->ct.handler = zfcp_fc_complete; 243 gid_pn->ct.handler_data = &completion; 244 gid_pn->ct.req = &gid_pn->sg_req; 245 gid_pn->ct.resp = &gid_pn->sg_resp; 246 sg_init_one(&gid_pn->sg_req, &gid_pn->gid_pn_req, 247 sizeof(struct zfcp_fc_gid_pn_req)); 248 sg_init_one(&gid_pn->sg_resp, &gid_pn->gid_pn_resp, 249 sizeof(struct zfcp_fc_gid_pn_resp)); 250 251 /* setup nameserver request */ 252 gid_pn->gid_pn_req.ct_hdr.ct_rev = FC_CT_REV; 253 gid_pn->gid_pn_req.ct_hdr.ct_fs_type = FC_FST_DIR; 254 gid_pn->gid_pn_req.ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; 255 gid_pn->gid_pn_req.ct_hdr.ct_options = 0; 256 gid_pn->gid_pn_req.ct_hdr.ct_cmd = FC_NS_GID_PN; 257 gid_pn->gid_pn_req.ct_hdr.ct_mr_size = ZFCP_FC_CT_SIZE_PAGE / 4; 258 gid_pn->gid_pn_req.gid_pn.fn_wwpn = port->wwpn; 259 260 ret = zfcp_fsf_send_ct(&adapter->gs->ds, &gid_pn->ct, 261 adapter->pool.gid_pn_req, 262 ZFCP_FC_CTELS_TMO); 263 if (!ret) { 264 wait_for_completion(&completion); 265 zfcp_fc_ns_gid_pn_eval(gid_pn); 266 } 267 return ret; 268 } 269 270 /** 271 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 272 * @port: port where GID_PN request is needed 273 * return: -ENOMEM on error, 0 otherwise 274 */ 275 static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) 276 { 277 int ret; 278 struct zfcp_fc_gid_pn *gid_pn; 279 struct zfcp_adapter *adapter = port->adapter; 280 281 gid_pn = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); 282 if (!gid_pn) 283 return -ENOMEM; 284 285 memset(gid_pn, 0, sizeof(*gid_pn)); 286 287 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 288 if (ret) 289 goto out; 290 291 ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); 292 293 zfcp_fc_wka_port_put(&adapter->gs->ds); 294 out: 295 mempool_free(gid_pn, adapter->pool.gid_pn); 296 return ret; 297 } 298 299 void zfcp_fc_port_did_lookup(struct work_struct *work) 300 { 301 int ret; 302 struct zfcp_port *port = container_of(work, struct zfcp_port, 303 gid_pn_work); 304 305 ret = zfcp_fc_ns_gid_pn(port); 306 if (ret) { 307 /* could not issue gid_pn for some reason */ 308 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); 309 goto out; 310 } 311 312 if (!port->d_id) { 313 zfcp_erp_port_failed(port, "fcgpn_2", NULL); 314 goto out; 315 } 316 317 zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); 318 out: 319 put_device(&port->dev); 320 } 321 322 /** 323 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request 324 * @port: The zfcp_port to lookup the d_id for. 325 */ 326 void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) 327 { 328 get_device(&port->dev); 329 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) 330 put_device(&port->dev); 331 } 332 333 /** 334 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 335 * @port: zfcp_port structure 336 * @plogi: plogi payload 337 * 338 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 339 */ 340 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) 341 { 342 if (plogi->fl_wwpn != port->wwpn) { 343 port->d_id = 0; 344 dev_warn(&port->adapter->ccw_device->dev, 345 "A port opened with WWPN 0x%016Lx returned data that " 346 "identifies it as WWPN 0x%016Lx\n", 347 (unsigned long long) port->wwpn, 348 (unsigned long long) plogi->fl_wwpn); 349 return; 350 } 351 352 port->wwnn = plogi->fl_wwnn; 353 port->maxframe_size = plogi->fl_csp.sp_bb_data; 354 355 if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) 356 port->supported_classes |= FC_COS_CLASS1; 357 if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) 358 port->supported_classes |= FC_COS_CLASS2; 359 if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) 360 port->supported_classes |= FC_COS_CLASS3; 361 if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) 362 port->supported_classes |= FC_COS_CLASS4; 363 } 364 365 static void zfcp_fc_adisc_handler(void *data) 366 { 367 struct zfcp_fc_els_adisc *adisc = data; 368 struct zfcp_port *port = adisc->els.port; 369 struct fc_els_adisc *adisc_resp = &adisc->adisc_resp; 370 371 if (adisc->els.status) { 372 /* request rejected or timed out */ 373 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 374 "fcadh_1", NULL); 375 goto out; 376 } 377 378 if (!port->wwnn) 379 port->wwnn = adisc_resp->adisc_wwnn; 380 381 if ((port->wwpn != adisc_resp->adisc_wwpn) || 382 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { 383 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 384 "fcadh_2", NULL); 385 goto out; 386 } 387 388 /* port is good, unblock rport without going through erp */ 389 zfcp_scsi_schedule_rport_register(port); 390 out: 391 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 392 put_device(&port->dev); 393 kmem_cache_free(zfcp_data.adisc_cache, adisc); 394 } 395 396 static int zfcp_fc_adisc(struct zfcp_port *port) 397 { 398 struct zfcp_fc_els_adisc *adisc; 399 struct zfcp_adapter *adapter = port->adapter; 400 int ret; 401 402 adisc = kmem_cache_alloc(zfcp_data.adisc_cache, GFP_ATOMIC); 403 if (!adisc) 404 return -ENOMEM; 405 406 adisc->els.port = port; 407 adisc->els.req = &adisc->req; 408 adisc->els.resp = &adisc->resp; 409 sg_init_one(adisc->els.req, &adisc->adisc_req, 410 sizeof(struct fc_els_adisc)); 411 sg_init_one(adisc->els.resp, &adisc->adisc_resp, 412 sizeof(struct fc_els_adisc)); 413 414 adisc->els.handler = zfcp_fc_adisc_handler; 415 adisc->els.handler_data = 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->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host); 420 adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host); 421 adisc->adisc_req.adisc_cmd = ELS_ADISC; 422 hton24(adisc->adisc_req.adisc_port_id, 423 fc_host_port_id(adapter->scsi_host)); 424 425 ret = zfcp_fsf_send_els(adapter, port->d_id, &adisc->els, 426 ZFCP_FC_CTELS_TMO); 427 if (ret) 428 kmem_cache_free(zfcp_data.adisc_cache, adisc); 429 430 return ret; 431 } 432 433 void zfcp_fc_link_test_work(struct work_struct *work) 434 { 435 struct zfcp_port *port = 436 container_of(work, struct zfcp_port, test_link_work); 437 int retval; 438 439 get_device(&port->dev); 440 port->rport_task = RPORT_DEL; 441 zfcp_scsi_rport_work(&port->rport_work); 442 443 /* only issue one test command at one time per port */ 444 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) 445 goto out; 446 447 atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 448 449 retval = zfcp_fc_adisc(port); 450 if (retval == 0) 451 return; 452 453 /* send of ADISC was not possible */ 454 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 455 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); 456 457 out: 458 put_device(&port->dev); 459 } 460 461 /** 462 * zfcp_fc_test_link - lightweight link test procedure 463 * @port: port to be tested 464 * 465 * Test status of a link to a remote port using the ELS command ADISC. 466 * If there is a problem with the remote port, error recovery steps 467 * will be triggered. 468 */ 469 void zfcp_fc_test_link(struct zfcp_port *port) 470 { 471 get_device(&port->dev); 472 if (!queue_work(port->adapter->work_queue, &port->test_link_work)) 473 put_device(&port->dev); 474 } 475 476 static void zfcp_free_sg_env(struct zfcp_fc_gpn_ft *gpn_ft, int buf_num) 477 { 478 struct scatterlist *sg = &gpn_ft->sg_req; 479 480 kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); 481 zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); 482 483 kfree(gpn_ft); 484 } 485 486 static struct zfcp_fc_gpn_ft *zfcp_alloc_sg_env(int buf_num) 487 { 488 struct zfcp_fc_gpn_ft *gpn_ft; 489 struct zfcp_fc_gpn_ft_req *req; 490 491 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 492 if (!gpn_ft) 493 return NULL; 494 495 req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); 496 if (!req) { 497 kfree(gpn_ft); 498 gpn_ft = NULL; 499 goto out; 500 } 501 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 502 503 if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { 504 zfcp_free_sg_env(gpn_ft, buf_num); 505 gpn_ft = NULL; 506 } 507 out: 508 return gpn_ft; 509 } 510 511 512 static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, 513 struct zfcp_adapter *adapter, int max_bytes) 514 { 515 struct zfcp_fsf_ct_els *ct = &gpn_ft->ct; 516 struct zfcp_fc_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 517 DECLARE_COMPLETION_ONSTACK(completion); 518 int ret; 519 520 /* prepare CT IU for GPN_FT */ 521 req->ct_hdr.ct_rev = FC_CT_REV; 522 req->ct_hdr.ct_fs_type = FC_FST_DIR; 523 req->ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; 524 req->ct_hdr.ct_options = 0; 525 req->ct_hdr.ct_cmd = FC_NS_GPN_FT; 526 req->ct_hdr.ct_mr_size = max_bytes / 4; 527 req->gpn_ft.fn_domain_id_scope = 0; 528 req->gpn_ft.fn_area_id_scope = 0; 529 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; 530 531 /* prepare zfcp_send_ct */ 532 ct->handler = zfcp_fc_complete; 533 ct->handler_data = &completion; 534 ct->req = &gpn_ft->sg_req; 535 ct->resp = gpn_ft->sg_resp; 536 537 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct, NULL, 538 ZFCP_FC_CTELS_TMO); 539 if (!ret) 540 wait_for_completion(&completion); 541 return ret; 542 } 543 544 static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) 545 { 546 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) 547 return; 548 549 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 550 551 if ((port->supported_classes != 0) || 552 !list_empty(&port->unit_list)) 553 return; 554 555 list_move_tail(&port->list, lh); 556 } 557 558 static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, 559 struct zfcp_adapter *adapter, int max_entries) 560 { 561 struct zfcp_fsf_ct_els *ct = &gpn_ft->ct; 562 struct scatterlist *sg = gpn_ft->sg_resp; 563 struct fc_ct_hdr *hdr = sg_virt(sg); 564 struct fc_gpn_ft_resp *acc = sg_virt(sg); 565 struct zfcp_port *port, *tmp; 566 unsigned long flags; 567 LIST_HEAD(remove_lh); 568 u32 d_id; 569 int ret = 0, x, last = 0; 570 571 if (ct->status) 572 return -EIO; 573 574 if (hdr->ct_cmd != FC_FS_ACC) { 575 if (hdr->ct_reason == FC_BA_RJT_UNABLE) 576 return -EAGAIN; /* might be a temporary condition */ 577 return -EIO; 578 } 579 580 if (hdr->ct_mr_size) { 581 dev_warn(&adapter->ccw_device->dev, 582 "The name server reported %d words residual data\n", 583 hdr->ct_mr_size); 584 return -E2BIG; 585 } 586 587 /* first entry is the header */ 588 for (x = 1; x < max_entries && !last; x++) { 589 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) 590 acc++; 591 else 592 acc = sg_virt(++sg); 593 594 last = acc->fp_flags & FC_NS_FID_LAST; 595 d_id = ntoh24(acc->fp_fid); 596 597 /* don't attach ports with a well known address */ 598 if (d_id >= FC_FID_WELL_KNOWN_BASE) 599 continue; 600 /* skip the adapter's port and known remote ports */ 601 if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host)) 602 continue; 603 604 port = zfcp_port_enqueue(adapter, acc->fp_wwpn, 605 ZFCP_STATUS_COMMON_NOESC, d_id); 606 if (!IS_ERR(port)) 607 zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); 608 else if (PTR_ERR(port) != -EEXIST) 609 ret = PTR_ERR(port); 610 } 611 612 zfcp_erp_wait(adapter); 613 write_lock_irqsave(&adapter->port_list_lock, flags); 614 list_for_each_entry_safe(port, tmp, &adapter->port_list, list) 615 zfcp_fc_validate_port(port, &remove_lh); 616 write_unlock_irqrestore(&adapter->port_list_lock, flags); 617 618 list_for_each_entry_safe(port, tmp, &remove_lh, list) { 619 zfcp_erp_port_shutdown(port, 0, "fcegpf2", NULL); 620 zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs); 621 } 622 623 return ret; 624 } 625 626 /** 627 * zfcp_fc_scan_ports - scan remote ports and attach new ports 628 * @work: reference to scheduled work 629 */ 630 void zfcp_fc_scan_ports(struct work_struct *work) 631 { 632 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, 633 scan_work); 634 int ret, i; 635 struct zfcp_fc_gpn_ft *gpn_ft; 636 int chain, max_entries, buf_num, max_bytes; 637 638 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; 639 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; 640 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; 641 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; 642 643 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && 644 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) 645 return; 646 647 if (zfcp_fc_wka_port_get(&adapter->gs->ds)) 648 return; 649 650 gpn_ft = zfcp_alloc_sg_env(buf_num); 651 if (!gpn_ft) 652 goto out; 653 654 for (i = 0; i < 3; i++) { 655 ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); 656 if (!ret) { 657 ret = zfcp_fc_eval_gpn_ft(gpn_ft, adapter, max_entries); 658 if (ret == -EAGAIN) 659 ssleep(1); 660 else 661 break; 662 } 663 } 664 zfcp_free_sg_env(gpn_ft, buf_num); 665 out: 666 zfcp_fc_wka_port_put(&adapter->gs->ds); 667 } 668 669 static void zfcp_fc_ct_els_job_handler(void *data) 670 { 671 struct fc_bsg_job *job = data; 672 struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data; 673 struct fc_bsg_reply *jr = job->reply; 674 675 jr->reply_payload_rcv_len = job->reply_payload.payload_len; 676 jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; 677 jr->result = zfcp_ct_els->status ? -EIO : 0; 678 job->job_done(job); 679 } 680 681 static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct fc_bsg_job *job) 682 { 683 u32 preamble_word1; 684 u8 gs_type; 685 struct zfcp_adapter *adapter; 686 687 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; 688 gs_type = (preamble_word1 & 0xff000000) >> 24; 689 690 adapter = (struct zfcp_adapter *) job->shost->hostdata[0]; 691 692 switch (gs_type) { 693 case FC_FST_ALIAS: 694 return &adapter->gs->as; 695 case FC_FST_MGMT: 696 return &adapter->gs->ms; 697 case FC_FST_TIME: 698 return &adapter->gs->ts; 699 break; 700 case FC_FST_DIR: 701 return &adapter->gs->ds; 702 break; 703 default: 704 return NULL; 705 } 706 } 707 708 static void zfcp_fc_ct_job_handler(void *data) 709 { 710 struct fc_bsg_job *job = data; 711 struct zfcp_fc_wka_port *wka_port; 712 713 wka_port = zfcp_fc_job_wka_port(job); 714 zfcp_fc_wka_port_put(wka_port); 715 716 zfcp_fc_ct_els_job_handler(data); 717 } 718 719 static int zfcp_fc_exec_els_job(struct fc_bsg_job *job, 720 struct zfcp_adapter *adapter) 721 { 722 struct zfcp_fsf_ct_els *els = job->dd_data; 723 struct fc_rport *rport = job->rport; 724 struct zfcp_port *port; 725 u32 d_id; 726 727 if (rport) { 728 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 729 if (!port) 730 return -EINVAL; 731 732 d_id = port->d_id; 733 put_device(&port->dev); 734 } else 735 d_id = ntoh24(job->request->rqst_data.h_els.port_id); 736 737 els->handler = zfcp_fc_ct_els_job_handler; 738 return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ); 739 } 740 741 static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job, 742 struct zfcp_adapter *adapter) 743 { 744 int ret; 745 struct zfcp_fsf_ct_els *ct = job->dd_data; 746 struct zfcp_fc_wka_port *wka_port; 747 748 wka_port = zfcp_fc_job_wka_port(job); 749 if (!wka_port) 750 return -EINVAL; 751 752 ret = zfcp_fc_wka_port_get(wka_port); 753 if (ret) 754 return ret; 755 756 ct->handler = zfcp_fc_ct_job_handler; 757 ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ); 758 if (ret) 759 zfcp_fc_wka_port_put(wka_port); 760 761 return ret; 762 } 763 764 int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job) 765 { 766 struct Scsi_Host *shost; 767 struct zfcp_adapter *adapter; 768 struct zfcp_fsf_ct_els *ct_els = job->dd_data; 769 770 shost = job->rport ? rport_to_shost(job->rport) : job->shost; 771 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 772 773 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 774 return -EINVAL; 775 776 ct_els->req = job->request_payload.sg_list; 777 ct_els->resp = job->reply_payload.sg_list; 778 ct_els->handler_data = job; 779 780 switch (job->request->msgcode) { 781 case FC_BSG_RPT_ELS: 782 case FC_BSG_HST_ELS_NOLOGIN: 783 return zfcp_fc_exec_els_job(job, adapter); 784 case FC_BSG_RPT_CT: 785 case FC_BSG_HST_CT: 786 return zfcp_fc_exec_ct_job(job, adapter); 787 default: 788 return -EINVAL; 789 } 790 } 791 792 int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *job) 793 { 794 /* hardware tracks timeout, reset bsg timeout to not interfere */ 795 return -EAGAIN; 796 } 797 798 int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) 799 { 800 struct zfcp_fc_wka_ports *wka_ports; 801 802 wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); 803 if (!wka_ports) 804 return -ENOMEM; 805 806 adapter->gs = wka_ports; 807 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); 808 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); 809 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); 810 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); 811 812 return 0; 813 } 814 815 void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) 816 { 817 kfree(adapter->gs); 818 adapter->gs = NULL; 819 } 820 821