zfcp_fc.c revision ee744622c65cd66824e8dd1b9509e515c800de14
1/* 2 * zfcp device driver 3 * 4 * Fibre Channel related functions for the zfcp device driver. 5 * 6 * Copyright IBM Corporation 2008, 2009 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 18static 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 25static 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 50static 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 } 66out: 67 mutex_unlock(&wka_port->mutex); 68} 69 70static 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 78static 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 92static 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 100void 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 110static 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 129static 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 154static 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 169static 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 179static 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 */ 193void 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 208static 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 228static void zfcp_fc_complete(void *data) 229{ 230 complete(data); 231} 232 233static 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 if (!ret) { 263 wait_for_completion(&completion); 264 zfcp_fc_ns_gid_pn_eval(gid_pn); 265 } 266 return ret; 267} 268 269/** 270 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 271 * @port: port where GID_PN request is needed 272 * return: -ENOMEM on error, 0 otherwise 273 */ 274static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) 275{ 276 int ret; 277 struct zfcp_fc_gid_pn *gid_pn; 278 struct zfcp_adapter *adapter = port->adapter; 279 280 gid_pn = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); 281 if (!gid_pn) 282 return -ENOMEM; 283 284 memset(gid_pn, 0, sizeof(*gid_pn)); 285 286 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 287 if (ret) 288 goto out; 289 290 ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); 291 292 zfcp_fc_wka_port_put(&adapter->gs->ds); 293out: 294 mempool_free(gid_pn, adapter->pool.gid_pn); 295 return ret; 296} 297 298void zfcp_fc_port_did_lookup(struct work_struct *work) 299{ 300 int ret; 301 struct zfcp_port *port = container_of(work, struct zfcp_port, 302 gid_pn_work); 303 304 ret = zfcp_fc_ns_gid_pn(port); 305 if (ret) { 306 /* could not issue gid_pn for some reason */ 307 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); 308 goto out; 309 } 310 311 if (!port->d_id) { 312 zfcp_erp_port_failed(port, "fcgpn_2", NULL); 313 goto out; 314 } 315 316 zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); 317out: 318 put_device(&port->sysfs_device); 319} 320 321/** 322 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request 323 * @port: The zfcp_port to lookup the d_id for. 324 */ 325void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) 326{ 327 get_device(&port->sysfs_device); 328 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) 329 put_device(&port->sysfs_device); 330} 331 332/** 333 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 334 * @port: zfcp_port structure 335 * @plogi: plogi payload 336 * 337 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 338 */ 339void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) 340{ 341 if (plogi->fl_wwpn != port->wwpn) { 342 port->d_id = 0; 343 dev_warn(&port->adapter->ccw_device->dev, 344 "A port opened with WWPN 0x%016Lx returned data that " 345 "identifies it as WWPN 0x%016Lx\n", 346 (unsigned long long) port->wwpn, 347 (unsigned long long) plogi->fl_wwpn); 348 return; 349 } 350 351 port->wwnn = plogi->fl_wwnn; 352 port->maxframe_size = plogi->fl_csp.sp_bb_data; 353 354 if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) 355 port->supported_classes |= FC_COS_CLASS1; 356 if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) 357 port->supported_classes |= FC_COS_CLASS2; 358 if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) 359 port->supported_classes |= FC_COS_CLASS3; 360 if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) 361 port->supported_classes |= FC_COS_CLASS4; 362} 363 364static void zfcp_fc_adisc_handler(void *data) 365{ 366 struct zfcp_fc_els_adisc *adisc = data; 367 struct zfcp_port *port = adisc->els.port; 368 struct fc_els_adisc *adisc_resp = &adisc->adisc_resp; 369 370 if (adisc->els.status) { 371 /* request rejected or timed out */ 372 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 373 "fcadh_1", NULL); 374 goto out; 375 } 376 377 if (!port->wwnn) 378 port->wwnn = adisc_resp->adisc_wwnn; 379 380 if ((port->wwpn != adisc_resp->adisc_wwpn) || 381 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { 382 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 383 "fcadh_2", NULL); 384 goto out; 385 } 386 387 /* port is good, unblock rport without going through erp */ 388 zfcp_scsi_schedule_rport_register(port); 389 out: 390 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 391 put_device(&port->sysfs_device); 392 kmem_cache_free(zfcp_data.adisc_cache, adisc); 393} 394 395static int zfcp_fc_adisc(struct zfcp_port *port) 396{ 397 struct zfcp_fc_els_adisc *adisc; 398 struct zfcp_adapter *adapter = port->adapter; 399 int ret; 400 401 adisc = kmem_cache_alloc(zfcp_data.adisc_cache, GFP_ATOMIC); 402 if (!adisc) 403 return -ENOMEM; 404 405 adisc->els.port = port; 406 adisc->els.req = &adisc->req; 407 adisc->els.resp = &adisc->resp; 408 sg_init_one(adisc->els.req, &adisc->adisc_req, 409 sizeof(struct fc_els_adisc)); 410 sg_init_one(adisc->els.resp, &adisc->adisc_resp, 411 sizeof(struct fc_els_adisc)); 412 413 adisc->els.handler = zfcp_fc_adisc_handler; 414 adisc->els.handler_data = 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->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host); 419 adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host); 420 adisc->adisc_req.adisc_cmd = ELS_ADISC; 421 hton24(adisc->adisc_req.adisc_port_id, 422 fc_host_port_id(adapter->scsi_host)); 423 424 ret = zfcp_fsf_send_els(adapter, port->d_id, &adisc->els); 425 if (ret) 426 kmem_cache_free(zfcp_data.adisc_cache, adisc); 427 428 return ret; 429} 430 431void zfcp_fc_link_test_work(struct work_struct *work) 432{ 433 struct zfcp_port *port = 434 container_of(work, struct zfcp_port, test_link_work); 435 int retval; 436 437 get_device(&port->sysfs_device); 438 port->rport_task = RPORT_DEL; 439 zfcp_scsi_rport_work(&port->rport_work); 440 441 /* only issue one test command at one time per port */ 442 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) 443 goto out; 444 445 atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 446 447 retval = zfcp_fc_adisc(port); 448 if (retval == 0) 449 return; 450 451 /* send of ADISC was not possible */ 452 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 453 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); 454 455out: 456 put_device(&port->sysfs_device); 457} 458 459/** 460 * zfcp_fc_test_link - lightweight link test procedure 461 * @port: port to be tested 462 * 463 * Test status of a link to a remote port using the ELS command ADISC. 464 * If there is a problem with the remote port, error recovery steps 465 * will be triggered. 466 */ 467void zfcp_fc_test_link(struct zfcp_port *port) 468{ 469 get_device(&port->sysfs_device); 470 if (!queue_work(port->adapter->work_queue, &port->test_link_work)) 471 put_device(&port->sysfs_device); 472} 473 474static void zfcp_free_sg_env(struct zfcp_fc_gpn_ft *gpn_ft, int buf_num) 475{ 476 struct scatterlist *sg = &gpn_ft->sg_req; 477 478 kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); 479 zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); 480 481 kfree(gpn_ft); 482} 483 484static struct zfcp_fc_gpn_ft *zfcp_alloc_sg_env(int buf_num) 485{ 486 struct zfcp_fc_gpn_ft *gpn_ft; 487 struct zfcp_fc_gpn_ft_req *req; 488 489 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 490 if (!gpn_ft) 491 return NULL; 492 493 req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); 494 if (!req) { 495 kfree(gpn_ft); 496 gpn_ft = NULL; 497 goto out; 498 } 499 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 500 501 if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { 502 zfcp_free_sg_env(gpn_ft, buf_num); 503 gpn_ft = NULL; 504 } 505out: 506 return gpn_ft; 507} 508 509 510static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, 511 struct zfcp_adapter *adapter, int max_bytes) 512{ 513 struct zfcp_fsf_ct_els *ct = &gpn_ft->ct; 514 struct zfcp_fc_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 515 DECLARE_COMPLETION_ONSTACK(completion); 516 int ret; 517 518 /* prepare CT IU for GPN_FT */ 519 req->ct_hdr.ct_rev = FC_CT_REV; 520 req->ct_hdr.ct_fs_type = FC_FST_DIR; 521 req->ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; 522 req->ct_hdr.ct_options = 0; 523 req->ct_hdr.ct_cmd = FC_NS_GPN_FT; 524 req->ct_hdr.ct_mr_size = max_bytes / 4; 525 req->gpn_ft.fn_domain_id_scope = 0; 526 req->gpn_ft.fn_area_id_scope = 0; 527 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; 528 529 /* prepare zfcp_send_ct */ 530 ct->handler = zfcp_fc_complete; 531 ct->handler_data = &completion; 532 ct->req = &gpn_ft->sg_req; 533 ct->resp = gpn_ft->sg_resp; 534 535 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct, NULL); 536 if (!ret) 537 wait_for_completion(&completion); 538 return ret; 539} 540 541static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) 542{ 543 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) 544 return; 545 546 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 547 548 if ((port->supported_classes != 0) || 549 !list_empty(&port->unit_list)) 550 return; 551 552 list_move_tail(&port->list, lh); 553} 554 555static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, 556 struct zfcp_adapter *adapter, int max_entries) 557{ 558 struct zfcp_fsf_ct_els *ct = &gpn_ft->ct; 559 struct scatterlist *sg = gpn_ft->sg_resp; 560 struct fc_ct_hdr *hdr = sg_virt(sg); 561 struct fc_gpn_ft_resp *acc = sg_virt(sg); 562 struct zfcp_port *port, *tmp; 563 unsigned long flags; 564 LIST_HEAD(remove_lh); 565 u32 d_id; 566 int ret = 0, x, last = 0; 567 568 if (ct->status) 569 return -EIO; 570 571 if (hdr->ct_cmd != FC_FS_ACC) { 572 if (hdr->ct_reason == FC_BA_RJT_UNABLE) 573 return -EAGAIN; /* might be a temporary condition */ 574 return -EIO; 575 } 576 577 if (hdr->ct_mr_size) { 578 dev_warn(&adapter->ccw_device->dev, 579 "The name server reported %d words residual data\n", 580 hdr->ct_mr_size); 581 return -E2BIG; 582 } 583 584 /* first entry is the header */ 585 for (x = 1; x < max_entries && !last; x++) { 586 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) 587 acc++; 588 else 589 acc = sg_virt(++sg); 590 591 last = acc->fp_flags & FC_NS_FID_LAST; 592 d_id = ntoh24(acc->fp_fid); 593 594 /* don't attach ports with a well known address */ 595 if (d_id >= FC_FID_WELL_KNOWN_BASE) 596 continue; 597 /* skip the adapter's port and known remote ports */ 598 if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host)) 599 continue; 600 601 port = zfcp_port_enqueue(adapter, acc->fp_wwpn, 602 ZFCP_STATUS_COMMON_NOESC, d_id); 603 if (!IS_ERR(port)) 604 zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); 605 else if (PTR_ERR(port) != -EEXIST) 606 ret = PTR_ERR(port); 607 } 608 609 zfcp_erp_wait(adapter); 610 write_lock_irqsave(&adapter->port_list_lock, flags); 611 list_for_each_entry_safe(port, tmp, &adapter->port_list, list) 612 zfcp_fc_validate_port(port, &remove_lh); 613 write_unlock_irqrestore(&adapter->port_list_lock, flags); 614 615 list_for_each_entry_safe(port, tmp, &remove_lh, list) { 616 zfcp_erp_port_shutdown(port, 0, "fcegpf2", NULL); 617 zfcp_device_unregister(&port->sysfs_device, 618 &zfcp_sysfs_port_attrs); 619 } 620 621 return ret; 622} 623 624/** 625 * zfcp_fc_scan_ports - scan remote ports and attach new ports 626 * @work: reference to scheduled work 627 */ 628void zfcp_fc_scan_ports(struct work_struct *work) 629{ 630 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, 631 scan_work); 632 int ret, i; 633 struct zfcp_fc_gpn_ft *gpn_ft; 634 int chain, max_entries, buf_num, max_bytes; 635 636 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; 637 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; 638 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; 639 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; 640 641 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && 642 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) 643 return; 644 645 if (zfcp_fc_wka_port_get(&adapter->gs->ds)) 646 return; 647 648 gpn_ft = zfcp_alloc_sg_env(buf_num); 649 if (!gpn_ft) 650 goto out; 651 652 for (i = 0; i < 3; i++) { 653 ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); 654 if (!ret) { 655 ret = zfcp_fc_eval_gpn_ft(gpn_ft, adapter, max_entries); 656 if (ret == -EAGAIN) 657 ssleep(1); 658 else 659 break; 660 } 661 } 662 zfcp_free_sg_env(gpn_ft, buf_num); 663out: 664 zfcp_fc_wka_port_put(&adapter->gs->ds); 665} 666 667static void zfcp_fc_ct_els_job_handler(void *data) 668{ 669 struct fc_bsg_job *job = data; 670 struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data; 671 int status = zfcp_ct_els->status; 672 int reply_status; 673 674 reply_status = status ? FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK; 675 job->reply->reply_data.ctels_reply.status = reply_status; 676 job->reply->reply_payload_rcv_len = job->reply_payload.payload_len; 677 job->job_done(job); 678} 679 680static int zfcp_fc_exec_els_job(struct fc_bsg_job *job, 681 struct zfcp_adapter *adapter) 682{ 683 struct zfcp_fsf_ct_els *els = job->dd_data; 684 struct fc_rport *rport = job->rport; 685 struct zfcp_port *port; 686 u32 d_id; 687 688 if (rport) { 689 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 690 if (!port) 691 return -EINVAL; 692 693 d_id = port->d_id; 694 put_device(&port->sysfs_device); 695 } else 696 d_id = ntoh24(job->request->rqst_data.h_els.port_id); 697 698 return zfcp_fsf_send_els(adapter, d_id, els); 699} 700 701static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job, 702 struct zfcp_adapter *adapter) 703{ 704 int ret; 705 u8 gs_type; 706 struct zfcp_fsf_ct_els *ct = job->dd_data; 707 struct zfcp_fc_wka_port *wka_port; 708 u32 preamble_word1; 709 710 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; 711 gs_type = (preamble_word1 & 0xff000000) >> 24; 712 713 switch (gs_type) { 714 case FC_FST_ALIAS: 715 wka_port = &adapter->gs->as; 716 break; 717 case FC_FST_MGMT: 718 wka_port = &adapter->gs->ms; 719 break; 720 case FC_FST_TIME: 721 wka_port = &adapter->gs->ts; 722 break; 723 case FC_FST_DIR: 724 wka_port = &adapter->gs->ds; 725 break; 726 default: 727 return -EINVAL; /* no such service */ 728 } 729 730 ret = zfcp_fc_wka_port_get(wka_port); 731 if (ret) 732 return ret; 733 734 ret = zfcp_fsf_send_ct(wka_port, ct, NULL); 735 if (ret) 736 zfcp_fc_wka_port_put(wka_port); 737 738 return ret; 739} 740 741int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job) 742{ 743 struct Scsi_Host *shost; 744 struct zfcp_adapter *adapter; 745 struct zfcp_fsf_ct_els *ct_els = job->dd_data; 746 747 shost = job->rport ? rport_to_shost(job->rport) : job->shost; 748 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 749 750 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 751 return -EINVAL; 752 753 ct_els->req = job->request_payload.sg_list; 754 ct_els->resp = job->reply_payload.sg_list; 755 ct_els->handler = zfcp_fc_ct_els_job_handler; 756 ct_els->handler_data = job; 757 758 switch (job->request->msgcode) { 759 case FC_BSG_RPT_ELS: 760 case FC_BSG_HST_ELS_NOLOGIN: 761 return zfcp_fc_exec_els_job(job, adapter); 762 case FC_BSG_RPT_CT: 763 case FC_BSG_HST_CT: 764 return zfcp_fc_exec_ct_job(job, adapter); 765 default: 766 return -EINVAL; 767 } 768} 769 770int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) 771{ 772 struct zfcp_fc_wka_ports *wka_ports; 773 774 wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); 775 if (!wka_ports) 776 return -ENOMEM; 777 778 adapter->gs = wka_ports; 779 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); 780 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); 781 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); 782 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); 783 784 return 0; 785} 786 787void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) 788{ 789 kfree(adapter->gs); 790 adapter->gs = NULL; 791} 792 793