zfcp_fc.c revision 6e51f085f64a79c7647e88a8a019b7bd84f42255
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 <linux/slab.h> 14#include <scsi/fc/fc_els.h> 15#include <scsi/libfc.h> 16#include "zfcp_ext.h" 17#include "zfcp_fc.h" 18 19static u32 zfcp_fc_rscn_range_mask[] = { 20 [ELS_ADDR_FMT_PORT] = 0xFFFFFF, 21 [ELS_ADDR_FMT_AREA] = 0xFFFF00, 22 [ELS_ADDR_FMT_DOM] = 0xFF0000, 23 [ELS_ADDR_FMT_FAB] = 0x000000, 24}; 25 26static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port) 27{ 28 if (mutex_lock_interruptible(&wka_port->mutex)) 29 return -ERESTARTSYS; 30 31 if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE || 32 wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) { 33 wka_port->status = ZFCP_FC_WKA_PORT_OPENING; 34 if (zfcp_fsf_open_wka_port(wka_port)) 35 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 36 } 37 38 mutex_unlock(&wka_port->mutex); 39 40 wait_event(wka_port->completion_wq, 41 wka_port->status == ZFCP_FC_WKA_PORT_ONLINE || 42 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE); 43 44 if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) { 45 atomic_inc(&wka_port->refcount); 46 return 0; 47 } 48 return -EIO; 49} 50 51static void zfcp_fc_wka_port_offline(struct work_struct *work) 52{ 53 struct delayed_work *dw = to_delayed_work(work); 54 struct zfcp_fc_wka_port *wka_port = 55 container_of(dw, struct zfcp_fc_wka_port, work); 56 57 mutex_lock(&wka_port->mutex); 58 if ((atomic_read(&wka_port->refcount) != 0) || 59 (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE)) 60 goto out; 61 62 wka_port->status = ZFCP_FC_WKA_PORT_CLOSING; 63 if (zfcp_fsf_close_wka_port(wka_port)) { 64 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 65 wake_up(&wka_port->completion_wq); 66 } 67out: 68 mutex_unlock(&wka_port->mutex); 69} 70 71static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port) 72{ 73 if (atomic_dec_return(&wka_port->refcount) != 0) 74 return; 75 /* wait 10 milliseconds, other reqs might pop in */ 76 schedule_delayed_work(&wka_port->work, HZ / 100); 77} 78 79static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id, 80 struct zfcp_adapter *adapter) 81{ 82 init_waitqueue_head(&wka_port->completion_wq); 83 84 wka_port->adapter = adapter; 85 wka_port->d_id = d_id; 86 87 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 88 atomic_set(&wka_port->refcount, 0); 89 mutex_init(&wka_port->mutex); 90 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); 91} 92 93static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka) 94{ 95 cancel_delayed_work_sync(&wka->work); 96 mutex_lock(&wka->mutex); 97 wka->status = ZFCP_FC_WKA_PORT_OFFLINE; 98 mutex_unlock(&wka->mutex); 99} 100 101void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs) 102{ 103 if (!gs) 104 return; 105 zfcp_fc_wka_port_force_offline(&gs->ms); 106 zfcp_fc_wka_port_force_offline(&gs->ts); 107 zfcp_fc_wka_port_force_offline(&gs->ds); 108 zfcp_fc_wka_port_force_offline(&gs->as); 109} 110 111static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 112 struct fc_els_rscn_page *page) 113{ 114 unsigned long flags; 115 struct zfcp_adapter *adapter = fsf_req->adapter; 116 struct zfcp_port *port; 117 118 read_lock_irqsave(&adapter->port_list_lock, flags); 119 list_for_each_entry(port, &adapter->port_list, list) { 120 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) 121 zfcp_fc_test_link(port); 122 if (!port->d_id) 123 zfcp_erp_port_reopen(port, 124 ZFCP_STATUS_COMMON_ERP_FAILED, 125 "fcrscn1", NULL); 126 } 127 read_unlock_irqrestore(&adapter->port_list_lock, flags); 128} 129 130static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 131{ 132 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 133 struct fc_els_rscn *head; 134 struct fc_els_rscn_page *page; 135 u16 i; 136 u16 no_entries; 137 unsigned int afmt; 138 139 head = (struct fc_els_rscn *) status_buffer->payload.data; 140 page = (struct fc_els_rscn_page *) head; 141 142 /* see FC-FS */ 143 no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page); 144 145 for (i = 1; i < no_entries; i++) { 146 /* skip head and start with 1st element */ 147 page++; 148 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; 149 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], 150 page); 151 } 152 queue_work(fsf_req->adapter->work_queue, &fsf_req->adapter->scan_work); 153} 154 155static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 156{ 157 unsigned long flags; 158 struct zfcp_adapter *adapter = req->adapter; 159 struct zfcp_port *port; 160 161 read_lock_irqsave(&adapter->port_list_lock, flags); 162 list_for_each_entry(port, &adapter->port_list, list) 163 if (port->wwpn == wwpn) { 164 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); 165 break; 166 } 167 read_unlock_irqrestore(&adapter->port_list_lock, flags); 168} 169 170static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 171{ 172 struct fsf_status_read_buffer *status_buffer; 173 struct fc_els_flogi *plogi; 174 175 status_buffer = (struct fsf_status_read_buffer *) req->data; 176 plogi = (struct fc_els_flogi *) status_buffer->payload.data; 177 zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn); 178} 179 180static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 181{ 182 struct fsf_status_read_buffer *status_buffer = 183 (struct fsf_status_read_buffer *)req->data; 184 struct fc_els_logo *logo = 185 (struct fc_els_logo *) status_buffer->payload.data; 186 187 zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn); 188} 189 190/** 191 * zfcp_fc_incoming_els - handle incoming ELS 192 * @fsf_req - request which contains incoming ELS 193 */ 194void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 195{ 196 struct fsf_status_read_buffer *status_buffer = 197 (struct fsf_status_read_buffer *) fsf_req->data; 198 unsigned int els_type = status_buffer->payload.data[0]; 199 200 zfcp_dbf_san_incoming_els(fsf_req); 201 if (els_type == ELS_PLOGI) 202 zfcp_fc_incoming_plogi(fsf_req); 203 else if (els_type == ELS_LOGO) 204 zfcp_fc_incoming_logo(fsf_req); 205 else if (els_type == ELS_RSCN) 206 zfcp_fc_incoming_rscn(fsf_req); 207} 208 209static void zfcp_fc_ns_gid_pn_eval(void *data) 210{ 211 struct zfcp_fc_gid_pn *gid_pn = data; 212 struct zfcp_fsf_ct_els *ct = &gid_pn->ct; 213 struct zfcp_fc_gid_pn_req *gid_pn_req = sg_virt(ct->req); 214 struct zfcp_fc_gid_pn_resp *gid_pn_resp = sg_virt(ct->resp); 215 struct zfcp_port *port = gid_pn->port; 216 217 if (ct->status) 218 return; 219 if (gid_pn_resp->ct_hdr.ct_cmd != FC_FS_ACC) 220 return; 221 222 /* paranoia */ 223 if (gid_pn_req->gid_pn.fn_wwpn != port->wwpn) 224 return; 225 /* looks like a valid d_id */ 226 port->d_id = ntoh24(gid_pn_resp->gid_pn.fp_fid); 227} 228 229static void zfcp_fc_complete(void *data) 230{ 231 complete(data); 232} 233 234static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, 235 struct zfcp_fc_gid_pn *gid_pn) 236{ 237 struct zfcp_adapter *adapter = port->adapter; 238 DECLARE_COMPLETION_ONSTACK(completion); 239 int ret; 240 241 /* setup parameters for send generic command */ 242 gid_pn->port = port; 243 gid_pn->ct.handler = zfcp_fc_complete; 244 gid_pn->ct.handler_data = &completion; 245 gid_pn->ct.req = &gid_pn->sg_req; 246 gid_pn->ct.resp = &gid_pn->sg_resp; 247 sg_init_one(&gid_pn->sg_req, &gid_pn->gid_pn_req, 248 sizeof(struct zfcp_fc_gid_pn_req)); 249 sg_init_one(&gid_pn->sg_resp, &gid_pn->gid_pn_resp, 250 sizeof(struct zfcp_fc_gid_pn_resp)); 251 252 /* setup nameserver request */ 253 gid_pn->gid_pn_req.ct_hdr.ct_rev = FC_CT_REV; 254 gid_pn->gid_pn_req.ct_hdr.ct_fs_type = FC_FST_DIR; 255 gid_pn->gid_pn_req.ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; 256 gid_pn->gid_pn_req.ct_hdr.ct_options = 0; 257 gid_pn->gid_pn_req.ct_hdr.ct_cmd = FC_NS_GID_PN; 258 gid_pn->gid_pn_req.ct_hdr.ct_mr_size = ZFCP_FC_CT_SIZE_PAGE / 4; 259 gid_pn->gid_pn_req.gid_pn.fn_wwpn = port->wwpn; 260 261 ret = zfcp_fsf_send_ct(&adapter->gs->ds, &gid_pn->ct, 262 adapter->pool.gid_pn_req, 263 ZFCP_FC_CTELS_TMO); 264 if (!ret) { 265 wait_for_completion(&completion); 266 zfcp_fc_ns_gid_pn_eval(gid_pn); 267 } 268 return ret; 269} 270 271/** 272 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 273 * @port: port where GID_PN request is needed 274 * return: -ENOMEM on error, 0 otherwise 275 */ 276static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) 277{ 278 int ret; 279 struct zfcp_fc_gid_pn *gid_pn; 280 struct zfcp_adapter *adapter = port->adapter; 281 282 gid_pn = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); 283 if (!gid_pn) 284 return -ENOMEM; 285 286 memset(gid_pn, 0, sizeof(*gid_pn)); 287 288 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 289 if (ret) 290 goto out; 291 292 ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); 293 294 zfcp_fc_wka_port_put(&adapter->gs->ds); 295out: 296 mempool_free(gid_pn, adapter->pool.gid_pn); 297 return ret; 298} 299 300void zfcp_fc_port_did_lookup(struct work_struct *work) 301{ 302 int ret; 303 struct zfcp_port *port = container_of(work, struct zfcp_port, 304 gid_pn_work); 305 306 ret = zfcp_fc_ns_gid_pn(port); 307 if (ret) { 308 /* could not issue gid_pn for some reason */ 309 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); 310 goto out; 311 } 312 313 if (!port->d_id) { 314 zfcp_erp_port_failed(port, "fcgpn_2", NULL); 315 goto out; 316 } 317 318 zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); 319out: 320 put_device(&port->dev); 321} 322 323/** 324 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request 325 * @port: The zfcp_port to lookup the d_id for. 326 */ 327void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) 328{ 329 get_device(&port->dev); 330 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) 331 put_device(&port->dev); 332} 333 334/** 335 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 336 * @port: zfcp_port structure 337 * @plogi: plogi payload 338 * 339 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 340 */ 341void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) 342{ 343 if (plogi->fl_wwpn != port->wwpn) { 344 port->d_id = 0; 345 dev_warn(&port->adapter->ccw_device->dev, 346 "A port opened with WWPN 0x%016Lx returned data that " 347 "identifies it as WWPN 0x%016Lx\n", 348 (unsigned long long) port->wwpn, 349 (unsigned long long) plogi->fl_wwpn); 350 return; 351 } 352 353 port->wwnn = plogi->fl_wwnn; 354 port->maxframe_size = plogi->fl_csp.sp_bb_data; 355 356 if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) 357 port->supported_classes |= FC_COS_CLASS1; 358 if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) 359 port->supported_classes |= FC_COS_CLASS2; 360 if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) 361 port->supported_classes |= FC_COS_CLASS3; 362 if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) 363 port->supported_classes |= FC_COS_CLASS4; 364} 365 366static void zfcp_fc_adisc_handler(void *data) 367{ 368 struct zfcp_fc_els_adisc *adisc = data; 369 struct zfcp_port *port = adisc->els.port; 370 struct fc_els_adisc *adisc_resp = &adisc->adisc_resp; 371 372 if (adisc->els.status) { 373 /* request rejected or timed out */ 374 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 375 "fcadh_1", NULL); 376 goto out; 377 } 378 379 if (!port->wwnn) 380 port->wwnn = adisc_resp->adisc_wwnn; 381 382 if ((port->wwpn != adisc_resp->adisc_wwpn) || 383 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { 384 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 385 "fcadh_2", NULL); 386 goto out; 387 } 388 389 /* port is good, unblock rport without going through erp */ 390 zfcp_scsi_schedule_rport_register(port); 391 out: 392 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 393 put_device(&port->dev); 394 kmem_cache_free(zfcp_data.adisc_cache, adisc); 395} 396 397static int zfcp_fc_adisc(struct zfcp_port *port) 398{ 399 struct zfcp_fc_els_adisc *adisc; 400 struct zfcp_adapter *adapter = port->adapter; 401 int ret; 402 403 adisc = kmem_cache_zalloc(zfcp_data.adisc_cache, GFP_ATOMIC); 404 if (!adisc) 405 return -ENOMEM; 406 407 adisc->els.port = port; 408 adisc->els.req = &adisc->req; 409 adisc->els.resp = &adisc->resp; 410 sg_init_one(adisc->els.req, &adisc->adisc_req, 411 sizeof(struct fc_els_adisc)); 412 sg_init_one(adisc->els.resp, &adisc->adisc_resp, 413 sizeof(struct fc_els_adisc)); 414 415 adisc->els.handler = zfcp_fc_adisc_handler; 416 adisc->els.handler_data = adisc; 417 418 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports 419 without FC-AL-2 capability, so we don't set it */ 420 adisc->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host); 421 adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host); 422 adisc->adisc_req.adisc_cmd = ELS_ADISC; 423 hton24(adisc->adisc_req.adisc_port_id, 424 fc_host_port_id(adapter->scsi_host)); 425 426 ret = zfcp_fsf_send_els(adapter, port->d_id, &adisc->els, 427 ZFCP_FC_CTELS_TMO); 428 if (ret) 429 kmem_cache_free(zfcp_data.adisc_cache, adisc); 430 431 return ret; 432} 433 434void zfcp_fc_link_test_work(struct work_struct *work) 435{ 436 struct zfcp_port *port = 437 container_of(work, struct zfcp_port, test_link_work); 438 int retval; 439 440 get_device(&port->dev); 441 port->rport_task = RPORT_DEL; 442 zfcp_scsi_rport_work(&port->rport_work); 443 444 /* only issue one test command at one time per port */ 445 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) 446 goto out; 447 448 atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 449 450 retval = zfcp_fc_adisc(port); 451 if (retval == 0) 452 return; 453 454 /* send of ADISC was not possible */ 455 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 456 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); 457 458out: 459 put_device(&port->dev); 460} 461 462/** 463 * zfcp_fc_test_link - lightweight link test procedure 464 * @port: port to be tested 465 * 466 * Test status of a link to a remote port using the ELS command ADISC. 467 * If there is a problem with the remote port, error recovery steps 468 * will be triggered. 469 */ 470void zfcp_fc_test_link(struct zfcp_port *port) 471{ 472 get_device(&port->dev); 473 if (!queue_work(port->adapter->work_queue, &port->test_link_work)) 474 put_device(&port->dev); 475} 476 477static void zfcp_free_sg_env(struct zfcp_fc_gpn_ft *gpn_ft, int buf_num) 478{ 479 struct scatterlist *sg = &gpn_ft->sg_req; 480 481 kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); 482 zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); 483 484 kfree(gpn_ft); 485} 486 487static struct zfcp_fc_gpn_ft *zfcp_alloc_sg_env(int buf_num) 488{ 489 struct zfcp_fc_gpn_ft *gpn_ft; 490 struct zfcp_fc_gpn_ft_req *req; 491 492 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 493 if (!gpn_ft) 494 return NULL; 495 496 req = kmem_cache_zalloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); 497 if (!req) { 498 kfree(gpn_ft); 499 gpn_ft = NULL; 500 goto out; 501 } 502 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 503 504 if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { 505 zfcp_free_sg_env(gpn_ft, buf_num); 506 gpn_ft = NULL; 507 } 508out: 509 return gpn_ft; 510} 511 512 513static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, 514 struct zfcp_adapter *adapter, int max_bytes) 515{ 516 struct zfcp_fsf_ct_els *ct = &gpn_ft->ct; 517 struct zfcp_fc_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 518 DECLARE_COMPLETION_ONSTACK(completion); 519 int ret; 520 521 /* prepare CT IU for GPN_FT */ 522 req->ct_hdr.ct_rev = FC_CT_REV; 523 req->ct_hdr.ct_fs_type = FC_FST_DIR; 524 req->ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; 525 req->ct_hdr.ct_options = 0; 526 req->ct_hdr.ct_cmd = FC_NS_GPN_FT; 527 req->ct_hdr.ct_mr_size = max_bytes / 4; 528 req->gpn_ft.fn_domain_id_scope = 0; 529 req->gpn_ft.fn_area_id_scope = 0; 530 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; 531 532 /* prepare zfcp_send_ct */ 533 ct->handler = zfcp_fc_complete; 534 ct->handler_data = &completion; 535 ct->req = &gpn_ft->sg_req; 536 ct->resp = gpn_ft->sg_resp; 537 538 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct, NULL, 539 ZFCP_FC_CTELS_TMO); 540 if (!ret) 541 wait_for_completion(&completion); 542 return ret; 543} 544 545static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) 546{ 547 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) 548 return; 549 550 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 551 552 if ((port->supported_classes != 0) || 553 !list_empty(&port->unit_list)) 554 return; 555 556 list_move_tail(&port->list, lh); 557} 558 559static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, 560 struct zfcp_adapter *adapter, int max_entries) 561{ 562 struct zfcp_fsf_ct_els *ct = &gpn_ft->ct; 563 struct scatterlist *sg = gpn_ft->sg_resp; 564 struct fc_ct_hdr *hdr = sg_virt(sg); 565 struct fc_gpn_ft_resp *acc = sg_virt(sg); 566 struct zfcp_port *port, *tmp; 567 unsigned long flags; 568 LIST_HEAD(remove_lh); 569 u32 d_id; 570 int ret = 0, x, last = 0; 571 572 if (ct->status) 573 return -EIO; 574 575 if (hdr->ct_cmd != FC_FS_ACC) { 576 if (hdr->ct_reason == FC_BA_RJT_UNABLE) 577 return -EAGAIN; /* might be a temporary condition */ 578 return -EIO; 579 } 580 581 if (hdr->ct_mr_size) { 582 dev_warn(&adapter->ccw_device->dev, 583 "The name server reported %d words residual data\n", 584 hdr->ct_mr_size); 585 return -E2BIG; 586 } 587 588 /* first entry is the header */ 589 for (x = 1; x < max_entries && !last; x++) { 590 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) 591 acc++; 592 else 593 acc = sg_virt(++sg); 594 595 last = acc->fp_flags & FC_NS_FID_LAST; 596 d_id = ntoh24(acc->fp_fid); 597 598 /* don't attach ports with a well known address */ 599 if (d_id >= FC_FID_WELL_KNOWN_BASE) 600 continue; 601 /* skip the adapter's port and known remote ports */ 602 if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host)) 603 continue; 604 605 port = zfcp_port_enqueue(adapter, acc->fp_wwpn, 606 ZFCP_STATUS_COMMON_NOESC, d_id); 607 if (!IS_ERR(port)) 608 zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); 609 else if (PTR_ERR(port) != -EEXIST) 610 ret = PTR_ERR(port); 611 } 612 613 zfcp_erp_wait(adapter); 614 write_lock_irqsave(&adapter->port_list_lock, flags); 615 list_for_each_entry_safe(port, tmp, &adapter->port_list, list) 616 zfcp_fc_validate_port(port, &remove_lh); 617 write_unlock_irqrestore(&adapter->port_list_lock, flags); 618 619 list_for_each_entry_safe(port, tmp, &remove_lh, list) { 620 zfcp_erp_port_shutdown(port, 0, "fcegpf2", NULL); 621 zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs); 622 } 623 624 return ret; 625} 626 627/** 628 * zfcp_fc_scan_ports - scan remote ports and attach new ports 629 * @work: reference to scheduled work 630 */ 631void zfcp_fc_scan_ports(struct work_struct *work) 632{ 633 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, 634 scan_work); 635 int ret, i; 636 struct zfcp_fc_gpn_ft *gpn_ft; 637 int chain, max_entries, buf_num, max_bytes; 638 639 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; 640 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; 641 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; 642 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; 643 644 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && 645 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) 646 return; 647 648 if (zfcp_fc_wka_port_get(&adapter->gs->ds)) 649 return; 650 651 gpn_ft = zfcp_alloc_sg_env(buf_num); 652 if (!gpn_ft) 653 goto out; 654 655 for (i = 0; i < 3; i++) { 656 ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); 657 if (!ret) { 658 ret = zfcp_fc_eval_gpn_ft(gpn_ft, adapter, max_entries); 659 if (ret == -EAGAIN) 660 ssleep(1); 661 else 662 break; 663 } 664 } 665 zfcp_free_sg_env(gpn_ft, buf_num); 666out: 667 zfcp_fc_wka_port_put(&adapter->gs->ds); 668} 669 670static void zfcp_fc_ct_els_job_handler(void *data) 671{ 672 struct fc_bsg_job *job = data; 673 struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data; 674 struct fc_bsg_reply *jr = job->reply; 675 676 jr->reply_payload_rcv_len = job->reply_payload.payload_len; 677 jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; 678 jr->result = zfcp_ct_els->status ? -EIO : 0; 679 job->job_done(job); 680} 681 682static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct fc_bsg_job *job) 683{ 684 u32 preamble_word1; 685 u8 gs_type; 686 struct zfcp_adapter *adapter; 687 688 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; 689 gs_type = (preamble_word1 & 0xff000000) >> 24; 690 691 adapter = (struct zfcp_adapter *) job->shost->hostdata[0]; 692 693 switch (gs_type) { 694 case FC_FST_ALIAS: 695 return &adapter->gs->as; 696 case FC_FST_MGMT: 697 return &adapter->gs->ms; 698 case FC_FST_TIME: 699 return &adapter->gs->ts; 700 break; 701 case FC_FST_DIR: 702 return &adapter->gs->ds; 703 break; 704 default: 705 return NULL; 706 } 707} 708 709static void zfcp_fc_ct_job_handler(void *data) 710{ 711 struct fc_bsg_job *job = data; 712 struct zfcp_fc_wka_port *wka_port; 713 714 wka_port = zfcp_fc_job_wka_port(job); 715 zfcp_fc_wka_port_put(wka_port); 716 717 zfcp_fc_ct_els_job_handler(data); 718} 719 720static int zfcp_fc_exec_els_job(struct fc_bsg_job *job, 721 struct zfcp_adapter *adapter) 722{ 723 struct zfcp_fsf_ct_els *els = job->dd_data; 724 struct fc_rport *rport = job->rport; 725 struct zfcp_port *port; 726 u32 d_id; 727 728 if (rport) { 729 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 730 if (!port) 731 return -EINVAL; 732 733 d_id = port->d_id; 734 put_device(&port->dev); 735 } else 736 d_id = ntoh24(job->request->rqst_data.h_els.port_id); 737 738 els->handler = zfcp_fc_ct_els_job_handler; 739 return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ); 740} 741 742static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job, 743 struct zfcp_adapter *adapter) 744{ 745 int ret; 746 struct zfcp_fsf_ct_els *ct = job->dd_data; 747 struct zfcp_fc_wka_port *wka_port; 748 749 wka_port = zfcp_fc_job_wka_port(job); 750 if (!wka_port) 751 return -EINVAL; 752 753 ret = zfcp_fc_wka_port_get(wka_port); 754 if (ret) 755 return ret; 756 757 ct->handler = zfcp_fc_ct_job_handler; 758 ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ); 759 if (ret) 760 zfcp_fc_wka_port_put(wka_port); 761 762 return ret; 763} 764 765int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job) 766{ 767 struct Scsi_Host *shost; 768 struct zfcp_adapter *adapter; 769 struct zfcp_fsf_ct_els *ct_els = job->dd_data; 770 771 shost = job->rport ? rport_to_shost(job->rport) : job->shost; 772 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 773 774 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 775 return -EINVAL; 776 777 ct_els->req = job->request_payload.sg_list; 778 ct_els->resp = job->reply_payload.sg_list; 779 ct_els->handler_data = job; 780 781 switch (job->request->msgcode) { 782 case FC_BSG_RPT_ELS: 783 case FC_BSG_HST_ELS_NOLOGIN: 784 return zfcp_fc_exec_els_job(job, adapter); 785 case FC_BSG_RPT_CT: 786 case FC_BSG_HST_CT: 787 return zfcp_fc_exec_ct_job(job, adapter); 788 default: 789 return -EINVAL; 790 } 791} 792 793int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *job) 794{ 795 /* hardware tracks timeout, reset bsg timeout to not interfere */ 796 return -EAGAIN; 797} 798 799int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) 800{ 801 struct zfcp_fc_wka_ports *wka_ports; 802 803 wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); 804 if (!wka_ports) 805 return -ENOMEM; 806 807 adapter->gs = wka_ports; 808 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); 809 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); 810 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); 811 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); 812 813 return 0; 814} 815 816void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) 817{ 818 kfree(adapter->gs); 819 adapter->gs = NULL; 820} 821 822