zfcp_fc.c revision dbf5dfe9dbcecf159139eec25ad256738cbc3715
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 25struct zfcp_fc_ns_handler_data { 26 struct completion done; 27 void (*handler)(unsigned long); 28 unsigned long handler_data; 29}; 30 31static int zfcp_fc_wka_port_get(struct zfcp_wka_port *wka_port) 32{ 33 if (mutex_lock_interruptible(&wka_port->mutex)) 34 return -ERESTARTSYS; 35 36 if (wka_port->status == ZFCP_WKA_PORT_OFFLINE || 37 wka_port->status == ZFCP_WKA_PORT_CLOSING) { 38 wka_port->status = ZFCP_WKA_PORT_OPENING; 39 if (zfcp_fsf_open_wka_port(wka_port)) 40 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 41 } 42 43 mutex_unlock(&wka_port->mutex); 44 45 wait_event(wka_port->completion_wq, 46 wka_port->status == ZFCP_WKA_PORT_ONLINE || 47 wka_port->status == ZFCP_WKA_PORT_OFFLINE); 48 49 if (wka_port->status == ZFCP_WKA_PORT_ONLINE) { 50 atomic_inc(&wka_port->refcount); 51 return 0; 52 } 53 return -EIO; 54} 55 56static void zfcp_fc_wka_port_offline(struct work_struct *work) 57{ 58 struct delayed_work *dw = to_delayed_work(work); 59 struct zfcp_wka_port *wka_port = 60 container_of(dw, struct zfcp_wka_port, work); 61 62 mutex_lock(&wka_port->mutex); 63 if ((atomic_read(&wka_port->refcount) != 0) || 64 (wka_port->status != ZFCP_WKA_PORT_ONLINE)) 65 goto out; 66 67 wka_port->status = ZFCP_WKA_PORT_CLOSING; 68 if (zfcp_fsf_close_wka_port(wka_port)) { 69 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 70 wake_up(&wka_port->completion_wq); 71 } 72out: 73 mutex_unlock(&wka_port->mutex); 74} 75 76static void zfcp_fc_wka_port_put(struct zfcp_wka_port *wka_port) 77{ 78 if (atomic_dec_return(&wka_port->refcount) != 0) 79 return; 80 /* wait 10 milliseconds, other reqs might pop in */ 81 schedule_delayed_work(&wka_port->work, HZ / 100); 82} 83 84static void zfcp_fc_wka_port_init(struct zfcp_wka_port *wka_port, u32 d_id, 85 struct zfcp_adapter *adapter) 86{ 87 init_waitqueue_head(&wka_port->completion_wq); 88 89 wka_port->adapter = adapter; 90 wka_port->d_id = d_id; 91 92 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 93 atomic_set(&wka_port->refcount, 0); 94 mutex_init(&wka_port->mutex); 95 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); 96} 97 98static void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka) 99{ 100 cancel_delayed_work_sync(&wka->work); 101 mutex_lock(&wka->mutex); 102 wka->status = ZFCP_WKA_PORT_OFFLINE; 103 mutex_unlock(&wka->mutex); 104} 105 106void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs) 107{ 108 if (!gs) 109 return; 110 zfcp_fc_wka_port_force_offline(&gs->ms); 111 zfcp_fc_wka_port_force_offline(&gs->ts); 112 zfcp_fc_wka_port_force_offline(&gs->ds); 113 zfcp_fc_wka_port_force_offline(&gs->as); 114 zfcp_fc_wka_port_force_offline(&gs->ks); 115} 116 117static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 118 struct fc_els_rscn_page *page) 119{ 120 unsigned long flags; 121 struct zfcp_adapter *adapter = fsf_req->adapter; 122 struct zfcp_port *port; 123 124 read_lock_irqsave(&adapter->port_list_lock, flags); 125 list_for_each_entry(port, &adapter->port_list, list) { 126 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) 127 zfcp_fc_test_link(port); 128 if (!port->d_id) 129 zfcp_erp_port_reopen(port, 130 ZFCP_STATUS_COMMON_ERP_FAILED, 131 "fcrscn1", NULL); 132 } 133 read_unlock_irqrestore(&adapter->port_list_lock, flags); 134} 135 136static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 137{ 138 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 139 struct fc_els_rscn *head; 140 struct fc_els_rscn_page *page; 141 u16 i; 142 u16 no_entries; 143 unsigned int afmt; 144 145 head = (struct fc_els_rscn *) status_buffer->payload.data; 146 page = (struct fc_els_rscn_page *) head; 147 148 /* see FC-FS */ 149 no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page); 150 151 for (i = 1; i < no_entries; i++) { 152 /* skip head and start with 1st element */ 153 page++; 154 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; 155 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], 156 page); 157 } 158 queue_work(fsf_req->adapter->work_queue, &fsf_req->adapter->scan_work); 159} 160 161static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 162{ 163 unsigned long flags; 164 struct zfcp_adapter *adapter = req->adapter; 165 struct zfcp_port *port; 166 167 read_lock_irqsave(&adapter->port_list_lock, flags); 168 list_for_each_entry(port, &adapter->port_list, list) 169 if (port->wwpn == wwpn) { 170 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); 171 break; 172 } 173 read_unlock_irqrestore(&adapter->port_list_lock, flags); 174} 175 176static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 177{ 178 struct fsf_status_read_buffer *status_buffer; 179 struct fc_els_flogi *plogi; 180 181 status_buffer = (struct fsf_status_read_buffer *) req->data; 182 plogi = (struct fc_els_flogi *) status_buffer->payload.data; 183 zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn); 184} 185 186static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 187{ 188 struct fsf_status_read_buffer *status_buffer = 189 (struct fsf_status_read_buffer *)req->data; 190 struct fc_els_logo *logo = 191 (struct fc_els_logo *) status_buffer->payload.data; 192 193 zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn); 194} 195 196/** 197 * zfcp_fc_incoming_els - handle incoming ELS 198 * @fsf_req - request which contains incoming ELS 199 */ 200void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 201{ 202 struct fsf_status_read_buffer *status_buffer = 203 (struct fsf_status_read_buffer *) fsf_req->data; 204 unsigned int els_type = status_buffer->payload.data[0]; 205 206 zfcp_dbf_san_incoming_els(fsf_req); 207 if (els_type == ELS_PLOGI) 208 zfcp_fc_incoming_plogi(fsf_req); 209 else if (els_type == ELS_LOGO) 210 zfcp_fc_incoming_logo(fsf_req); 211 else if (els_type == ELS_RSCN) 212 zfcp_fc_incoming_rscn(fsf_req); 213} 214 215static void zfcp_fc_ns_handler(unsigned long data) 216{ 217 struct zfcp_fc_ns_handler_data *compl_rec = 218 (struct zfcp_fc_ns_handler_data *) data; 219 220 if (compl_rec->handler) 221 compl_rec->handler(compl_rec->handler_data); 222 223 complete(&compl_rec->done); 224} 225 226static void zfcp_fc_ns_gid_pn_eval(unsigned long data) 227{ 228 struct zfcp_fc_gid_pn *gid_pn = (struct zfcp_fc_gid_pn *) data; 229 struct zfcp_send_ct *ct = &gid_pn->ct; 230 struct zfcp_fc_gid_pn_req *gid_pn_req = sg_virt(ct->req); 231 struct zfcp_fc_gid_pn_resp *gid_pn_resp = sg_virt(ct->resp); 232 struct zfcp_port *port = gid_pn->port; 233 234 if (ct->status) 235 return; 236 if (gid_pn_resp->ct_hdr.ct_cmd != FC_FS_ACC) 237 return; 238 239 /* paranoia */ 240 if (gid_pn_req->gid_pn.fn_wwpn != port->wwpn) 241 return; 242 /* looks like a valid d_id */ 243 port->d_id = ntoh24(gid_pn_resp->gid_pn.fp_fid); 244} 245 246static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, 247 struct zfcp_fc_gid_pn *gid_pn) 248{ 249 struct zfcp_adapter *adapter = port->adapter; 250 struct zfcp_fc_ns_handler_data compl_rec; 251 int ret; 252 253 /* setup parameters for send generic command */ 254 gid_pn->port = port; 255 gid_pn->ct.wka_port = &adapter->gs->ds; 256 gid_pn->ct.handler = zfcp_fc_ns_handler; 257 gid_pn->ct.handler_data = (unsigned long) &compl_rec; 258 gid_pn->ct.req = &gid_pn->sg_req; 259 gid_pn->ct.resp = &gid_pn->sg_resp; 260 sg_init_one(&gid_pn->sg_req, &gid_pn->gid_pn_req, 261 sizeof(struct zfcp_fc_gid_pn_req)); 262 sg_init_one(&gid_pn->sg_resp, &gid_pn->gid_pn_resp, 263 sizeof(struct zfcp_fc_gid_pn_resp)); 264 265 /* setup nameserver request */ 266 gid_pn->gid_pn_req.ct_hdr.ct_rev = FC_CT_REV; 267 gid_pn->gid_pn_req.ct_hdr.ct_fs_type = FC_FST_DIR; 268 gid_pn->gid_pn_req.ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; 269 gid_pn->gid_pn_req.ct_hdr.ct_options = 0; 270 gid_pn->gid_pn_req.ct_hdr.ct_cmd = FC_NS_GID_PN; 271 gid_pn->gid_pn_req.ct_hdr.ct_mr_size = ZFCP_FC_CT_SIZE_PAGE / 4; 272 gid_pn->gid_pn_req.gid_pn.fn_wwpn = port->wwpn; 273 274 init_completion(&compl_rec.done); 275 compl_rec.handler = zfcp_fc_ns_gid_pn_eval; 276 compl_rec.handler_data = (unsigned long) gid_pn; 277 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req); 278 if (!ret) 279 wait_for_completion(&compl_rec.done); 280 return ret; 281} 282 283/** 284 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 285 * @port: port where GID_PN request is needed 286 * return: -ENOMEM on error, 0 otherwise 287 */ 288static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) 289{ 290 int ret; 291 struct zfcp_fc_gid_pn *gid_pn; 292 struct zfcp_adapter *adapter = port->adapter; 293 294 gid_pn = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); 295 if (!gid_pn) 296 return -ENOMEM; 297 298 memset(gid_pn, 0, sizeof(*gid_pn)); 299 300 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 301 if (ret) 302 goto out; 303 304 ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); 305 306 zfcp_fc_wka_port_put(&adapter->gs->ds); 307out: 308 mempool_free(gid_pn, adapter->pool.gid_pn); 309 return ret; 310} 311 312void zfcp_fc_port_did_lookup(struct work_struct *work) 313{ 314 int ret; 315 struct zfcp_port *port = container_of(work, struct zfcp_port, 316 gid_pn_work); 317 318 ret = zfcp_fc_ns_gid_pn(port); 319 if (ret) { 320 /* could not issue gid_pn for some reason */ 321 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); 322 goto out; 323 } 324 325 if (!port->d_id) { 326 zfcp_erp_port_failed(port, "fcgpn_2", NULL); 327 goto out; 328 } 329 330 zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); 331out: 332 put_device(&port->sysfs_device); 333} 334 335/** 336 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request 337 * @port: The zfcp_port to lookup the d_id for. 338 */ 339void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) 340{ 341 get_device(&port->sysfs_device); 342 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) 343 put_device(&port->sysfs_device); 344} 345 346/** 347 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 348 * @port: zfcp_port structure 349 * @plogi: plogi payload 350 * 351 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 352 */ 353void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) 354{ 355 if (plogi->fl_wwpn != port->wwpn) { 356 port->d_id = 0; 357 dev_warn(&port->adapter->ccw_device->dev, 358 "A port opened with WWPN 0x%016Lx returned data that " 359 "identifies it as WWPN 0x%016Lx\n", 360 (unsigned long long) port->wwpn, 361 (unsigned long long) plogi->fl_wwpn); 362 return; 363 } 364 365 port->wwnn = plogi->fl_wwnn; 366 port->maxframe_size = plogi->fl_csp.sp_bb_data; 367 368 if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) 369 port->supported_classes |= FC_COS_CLASS1; 370 if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) 371 port->supported_classes |= FC_COS_CLASS2; 372 if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) 373 port->supported_classes |= FC_COS_CLASS3; 374 if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) 375 port->supported_classes |= FC_COS_CLASS4; 376} 377 378static void zfcp_fc_adisc_handler(unsigned long data) 379{ 380 struct zfcp_fc_els_adisc *adisc = (struct zfcp_fc_els_adisc *) data; 381 struct zfcp_port *port = adisc->els.port; 382 struct fc_els_adisc *adisc_resp = &adisc->adisc_resp; 383 384 if (adisc->els.status) { 385 /* request rejected or timed out */ 386 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 387 "fcadh_1", NULL); 388 goto out; 389 } 390 391 if (!port->wwnn) 392 port->wwnn = adisc_resp->adisc_wwnn; 393 394 if ((port->wwpn != adisc_resp->adisc_wwpn) || 395 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { 396 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 397 "fcadh_2", NULL); 398 goto out; 399 } 400 401 /* port is good, unblock rport without going through erp */ 402 zfcp_scsi_schedule_rport_register(port); 403 out: 404 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 405 put_device(&port->sysfs_device); 406 kfree(adisc); 407} 408 409static int zfcp_fc_adisc(struct zfcp_port *port) 410{ 411 struct zfcp_fc_els_adisc *adisc; 412 struct zfcp_adapter *adapter = port->adapter; 413 414 adisc = kzalloc(sizeof(struct zfcp_fc_els_adisc), GFP_ATOMIC); 415 if (!adisc) 416 return -ENOMEM; 417 418 adisc->els.req = &adisc->req; 419 adisc->els.resp = &adisc->resp; 420 sg_init_one(adisc->els.req, &adisc->adisc_req, 421 sizeof(struct fc_els_adisc)); 422 sg_init_one(adisc->els.resp, &adisc->adisc_resp, 423 sizeof(struct fc_els_adisc)); 424 425 adisc->els.adapter = adapter; 426 adisc->els.port = port; 427 adisc->els.d_id = port->d_id; 428 adisc->els.handler = zfcp_fc_adisc_handler; 429 adisc->els.handler_data = (unsigned long) adisc; 430 adisc->els.ls_code = adisc->adisc_req.adisc_cmd = ELS_ADISC; 431 432 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports 433 without FC-AL-2 capability, so we don't set it */ 434 adisc->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host); 435 adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host); 436 hton24(adisc->adisc_req.adisc_port_id, 437 fc_host_port_id(adapter->scsi_host)); 438 439 return zfcp_fsf_send_els(&adisc->els); 440} 441 442void zfcp_fc_link_test_work(struct work_struct *work) 443{ 444 struct zfcp_port *port = 445 container_of(work, struct zfcp_port, test_link_work); 446 int retval; 447 448 get_device(&port->sysfs_device); 449 port->rport_task = RPORT_DEL; 450 zfcp_scsi_rport_work(&port->rport_work); 451 452 /* only issue one test command at one time per port */ 453 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) 454 goto out; 455 456 atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 457 458 retval = zfcp_fc_adisc(port); 459 if (retval == 0) 460 return; 461 462 /* send of ADISC was not possible */ 463 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 464 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); 465 466out: 467 put_device(&port->sysfs_device); 468} 469 470/** 471 * zfcp_fc_test_link - lightweight link test procedure 472 * @port: port to be tested 473 * 474 * Test status of a link to a remote port using the ELS command ADISC. 475 * If there is a problem with the remote port, error recovery steps 476 * will be triggered. 477 */ 478void zfcp_fc_test_link(struct zfcp_port *port) 479{ 480 get_device(&port->sysfs_device); 481 if (!queue_work(port->adapter->work_queue, &port->test_link_work)) 482 put_device(&port->sysfs_device); 483} 484 485static void zfcp_free_sg_env(struct zfcp_fc_gpn_ft *gpn_ft, int buf_num) 486{ 487 struct scatterlist *sg = &gpn_ft->sg_req; 488 489 kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); 490 zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); 491 492 kfree(gpn_ft); 493} 494 495static struct zfcp_fc_gpn_ft *zfcp_alloc_sg_env(int buf_num) 496{ 497 struct zfcp_fc_gpn_ft *gpn_ft; 498 struct zfcp_fc_gpn_ft_req *req; 499 500 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 501 if (!gpn_ft) 502 return NULL; 503 504 req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); 505 if (!req) { 506 kfree(gpn_ft); 507 gpn_ft = NULL; 508 goto out; 509 } 510 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 511 512 if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { 513 zfcp_free_sg_env(gpn_ft, buf_num); 514 gpn_ft = NULL; 515 } 516out: 517 return gpn_ft; 518} 519 520 521static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, 522 struct zfcp_adapter *adapter, int max_bytes) 523{ 524 struct zfcp_send_ct *ct = &gpn_ft->ct; 525 struct zfcp_fc_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 526 struct zfcp_fc_ns_handler_data compl_rec; 527 int ret; 528 529 /* prepare CT IU for GPN_FT */ 530 req->ct_hdr.ct_rev = FC_CT_REV; 531 req->ct_hdr.ct_fs_type = FC_FST_DIR; 532 req->ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; 533 req->ct_hdr.ct_options = 0; 534 req->ct_hdr.ct_cmd = FC_NS_GPN_FT; 535 req->ct_hdr.ct_mr_size = max_bytes / 4; 536 req->gpn_ft.fn_domain_id_scope = 0; 537 req->gpn_ft.fn_area_id_scope = 0; 538 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; 539 540 /* prepare zfcp_send_ct */ 541 ct->wka_port = &adapter->gs->ds; 542 ct->handler = zfcp_fc_ns_handler; 543 ct->handler_data = (unsigned long)&compl_rec; 544 ct->req = &gpn_ft->sg_req; 545 ct->resp = gpn_ft->sg_resp; 546 547 init_completion(&compl_rec.done); 548 compl_rec.handler = NULL; 549 ret = zfcp_fsf_send_ct(ct, NULL); 550 if (!ret) 551 wait_for_completion(&compl_rec.done); 552 return ret; 553} 554 555static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) 556{ 557 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) 558 return; 559 560 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 561 562 if ((port->supported_classes != 0) || 563 !list_empty(&port->unit_list)) 564 return; 565 566 list_move_tail(&port->list, lh); 567} 568 569static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, int max_entries) 570{ 571 struct zfcp_send_ct *ct = &gpn_ft->ct; 572 struct scatterlist *sg = gpn_ft->sg_resp; 573 struct fc_ct_hdr *hdr = sg_virt(sg); 574 struct fc_gpn_ft_resp *acc = sg_virt(sg); 575 struct zfcp_adapter *adapter = ct->wka_port->adapter; 576 struct zfcp_port *port, *tmp; 577 unsigned long flags; 578 LIST_HEAD(remove_lh); 579 u32 d_id; 580 int ret = 0, x, last = 0; 581 582 if (ct->status) 583 return -EIO; 584 585 if (hdr->ct_cmd != FC_FS_ACC) { 586 if (hdr->ct_reason == FC_BA_RJT_UNABLE) 587 return -EAGAIN; /* might be a temporary condition */ 588 return -EIO; 589 } 590 591 if (hdr->ct_mr_size) { 592 dev_warn(&adapter->ccw_device->dev, 593 "The name server reported %d words residual data\n", 594 hdr->ct_mr_size); 595 return -E2BIG; 596 } 597 598 /* first entry is the header */ 599 for (x = 1; x < max_entries && !last; x++) { 600 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) 601 acc++; 602 else 603 acc = sg_virt(++sg); 604 605 last = acc->fp_flags & FC_NS_FID_LAST; 606 d_id = ntoh24(acc->fp_fid); 607 608 /* don't attach ports with a well known address */ 609 if (d_id >= FC_FID_WELL_KNOWN_BASE) 610 continue; 611 /* skip the adapter's port and known remote ports */ 612 if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host)) 613 continue; 614 615 port = zfcp_port_enqueue(adapter, acc->fp_wwpn, 616 ZFCP_STATUS_COMMON_NOESC, d_id); 617 if (!IS_ERR(port)) 618 zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); 619 else if (PTR_ERR(port) != -EEXIST) 620 ret = PTR_ERR(port); 621 } 622 623 zfcp_erp_wait(adapter); 624 write_lock_irqsave(&adapter->port_list_lock, flags); 625 list_for_each_entry_safe(port, tmp, &adapter->port_list, list) 626 zfcp_fc_validate_port(port, &remove_lh); 627 write_unlock_irqrestore(&adapter->port_list_lock, flags); 628 629 list_for_each_entry_safe(port, tmp, &remove_lh, list) { 630 zfcp_erp_port_shutdown(port, 0, "fcegpf2", NULL); 631 zfcp_device_unregister(&port->sysfs_device, 632 &zfcp_sysfs_port_attrs); 633 } 634 635 return ret; 636} 637 638/** 639 * zfcp_fc_scan_ports - scan remote ports and attach new ports 640 * @work: reference to scheduled work 641 */ 642void zfcp_fc_scan_ports(struct work_struct *work) 643{ 644 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, 645 scan_work); 646 int ret, i; 647 struct zfcp_fc_gpn_ft *gpn_ft; 648 int chain, max_entries, buf_num, max_bytes; 649 650 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; 651 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; 652 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; 653 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; 654 655 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && 656 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) 657 return; 658 659 if (zfcp_fc_wka_port_get(&adapter->gs->ds)) 660 return; 661 662 gpn_ft = zfcp_alloc_sg_env(buf_num); 663 if (!gpn_ft) 664 goto out; 665 666 for (i = 0; i < 3; i++) { 667 ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); 668 if (!ret) { 669 ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries); 670 if (ret == -EAGAIN) 671 ssleep(1); 672 else 673 break; 674 } 675 } 676 zfcp_free_sg_env(gpn_ft, buf_num); 677out: 678 zfcp_fc_wka_port_put(&adapter->gs->ds); 679} 680 681 682struct zfcp_els_fc_job { 683 struct zfcp_send_els els; 684 struct fc_bsg_job *job; 685}; 686 687static void zfcp_fc_generic_els_handler(unsigned long data) 688{ 689 struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data; 690 struct fc_bsg_job *job = els_fc_job->job; 691 struct fc_bsg_reply *reply = job->reply; 692 693 if (els_fc_job->els.status) { 694 /* request rejected or timed out */ 695 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT; 696 goto out; 697 } 698 699 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; 700 reply->reply_payload_rcv_len = job->reply_payload.payload_len; 701 702out: 703 job->state_flags = FC_RQST_STATE_DONE; 704 job->job_done(job); 705 kfree(els_fc_job); 706} 707 708int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job) 709{ 710 struct zfcp_els_fc_job *els_fc_job; 711 struct fc_rport *rport = job->rport; 712 struct Scsi_Host *shost; 713 struct zfcp_adapter *adapter; 714 struct zfcp_port *port; 715 u8 *port_did; 716 717 shost = rport ? rport_to_shost(rport) : job->shost; 718 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 719 720 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 721 return -EINVAL; 722 723 els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL); 724 if (!els_fc_job) 725 return -ENOMEM; 726 727 els_fc_job->els.adapter = adapter; 728 if (rport) { 729 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 730 if (!port) { 731 kfree(els_fc_job); 732 return -EINVAL; 733 } 734 735 els_fc_job->els.d_id = port->d_id; 736 put_device(&port->sysfs_device); 737 } else { 738 port_did = job->request->rqst_data.h_els.port_id; 739 els_fc_job->els.d_id = (port_did[0] << 16) + 740 (port_did[1] << 8) + port_did[2]; 741 } 742 743 els_fc_job->els.req = job->request_payload.sg_list; 744 els_fc_job->els.resp = job->reply_payload.sg_list; 745 els_fc_job->els.handler = zfcp_fc_generic_els_handler; 746 els_fc_job->els.handler_data = (unsigned long) els_fc_job; 747 els_fc_job->job = job; 748 749 return zfcp_fsf_send_els(&els_fc_job->els); 750} 751 752struct zfcp_ct_fc_job { 753 struct zfcp_send_ct ct; 754 struct fc_bsg_job *job; 755}; 756 757static void zfcp_fc_generic_ct_handler(unsigned long data) 758{ 759 struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data; 760 struct fc_bsg_job *job = ct_fc_job->job; 761 762 job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ? 763 FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK; 764 job->reply->reply_payload_rcv_len = job->reply_payload.payload_len; 765 job->state_flags = FC_RQST_STATE_DONE; 766 job->job_done(job); 767 768 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 769 770 kfree(ct_fc_job); 771} 772 773int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job) 774{ 775 int ret; 776 u8 gs_type; 777 struct fc_rport *rport = job->rport; 778 struct Scsi_Host *shost; 779 struct zfcp_adapter *adapter; 780 struct zfcp_ct_fc_job *ct_fc_job; 781 u32 preamble_word1; 782 783 shost = rport ? rport_to_shost(rport) : job->shost; 784 785 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 786 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 787 return -EINVAL; 788 789 ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL); 790 if (!ct_fc_job) 791 return -ENOMEM; 792 793 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; 794 gs_type = (preamble_word1 & 0xff000000) >> 24; 795 796 switch (gs_type) { 797 case FC_FST_ALIAS: 798 ct_fc_job->ct.wka_port = &adapter->gs->as; 799 break; 800 case FC_FST_MGMT: 801 ct_fc_job->ct.wka_port = &adapter->gs->ms; 802 break; 803 case FC_FST_TIME: 804 ct_fc_job->ct.wka_port = &adapter->gs->ts; 805 break; 806 case FC_FST_DIR: 807 ct_fc_job->ct.wka_port = &adapter->gs->ds; 808 break; 809 default: 810 kfree(ct_fc_job); 811 return -EINVAL; /* no such service */ 812 } 813 814 ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port); 815 if (ret) { 816 kfree(ct_fc_job); 817 return ret; 818 } 819 820 ct_fc_job->ct.req = job->request_payload.sg_list; 821 ct_fc_job->ct.resp = job->reply_payload.sg_list; 822 ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler; 823 ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job; 824 ct_fc_job->ct.completion = NULL; 825 ct_fc_job->job = job; 826 827 ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL); 828 if (ret) { 829 kfree(ct_fc_job); 830 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 831 } 832 return ret; 833} 834 835int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) 836{ 837 struct zfcp_wka_ports *wka_ports; 838 839 wka_ports = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL); 840 if (!wka_ports) 841 return -ENOMEM; 842 843 adapter->gs = wka_ports; 844 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); 845 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); 846 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); 847 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); 848 zfcp_fc_wka_port_init(&wka_ports->ks, FC_FID_SEC_KEY, adapter); 849 850 return 0; 851} 852 853void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) 854{ 855 kfree(adapter->gs); 856 adapter->gs = NULL; 857} 858 859