zfcp_fc.c revision 9d05ce2c0a6704ff84df02cbb3baef94fcac4f5d
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 gpn_ft_resp_acc { 26 u8 control; 27 u8 port_id[3]; 28 u8 reserved[4]; 29 u64 wwpn; 30} __attribute__ ((packed)); 31 32#define ZFCP_CT_SIZE_ONE_PAGE (PAGE_SIZE - sizeof(struct ct_hdr)) 33#define ZFCP_GPN_FT_ENTRIES (ZFCP_CT_SIZE_ONE_PAGE \ 34 / sizeof(struct gpn_ft_resp_acc)) 35#define ZFCP_GPN_FT_BUFFERS 4 36#define ZFCP_GPN_FT_MAX_SIZE (ZFCP_GPN_FT_BUFFERS * PAGE_SIZE \ 37 - sizeof(struct ct_hdr)) 38#define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) 39 40struct ct_iu_gpn_ft_resp { 41 struct ct_hdr header; 42 struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; 43} __attribute__ ((packed)); 44 45struct zfcp_gpn_ft { 46 struct zfcp_send_ct ct; 47 struct scatterlist sg_req; 48 struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; 49}; 50 51struct zfcp_fc_ns_handler_data { 52 struct completion done; 53 void (*handler)(unsigned long); 54 unsigned long handler_data; 55}; 56 57static int zfcp_fc_wka_port_get(struct zfcp_wka_port *wka_port) 58{ 59 if (mutex_lock_interruptible(&wka_port->mutex)) 60 return -ERESTARTSYS; 61 62 if (wka_port->status == ZFCP_WKA_PORT_OFFLINE || 63 wka_port->status == ZFCP_WKA_PORT_CLOSING) { 64 wka_port->status = ZFCP_WKA_PORT_OPENING; 65 if (zfcp_fsf_open_wka_port(wka_port)) 66 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 67 } 68 69 mutex_unlock(&wka_port->mutex); 70 71 wait_event(wka_port->completion_wq, 72 wka_port->status == ZFCP_WKA_PORT_ONLINE || 73 wka_port->status == ZFCP_WKA_PORT_OFFLINE); 74 75 if (wka_port->status == ZFCP_WKA_PORT_ONLINE) { 76 atomic_inc(&wka_port->refcount); 77 return 0; 78 } 79 return -EIO; 80} 81 82static void zfcp_fc_wka_port_offline(struct work_struct *work) 83{ 84 struct delayed_work *dw = to_delayed_work(work); 85 struct zfcp_wka_port *wka_port = 86 container_of(dw, struct zfcp_wka_port, work); 87 88 mutex_lock(&wka_port->mutex); 89 if ((atomic_read(&wka_port->refcount) != 0) || 90 (wka_port->status != ZFCP_WKA_PORT_ONLINE)) 91 goto out; 92 93 wka_port->status = ZFCP_WKA_PORT_CLOSING; 94 if (zfcp_fsf_close_wka_port(wka_port)) { 95 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 96 wake_up(&wka_port->completion_wq); 97 } 98out: 99 mutex_unlock(&wka_port->mutex); 100} 101 102static void zfcp_fc_wka_port_put(struct zfcp_wka_port *wka_port) 103{ 104 if (atomic_dec_return(&wka_port->refcount) != 0) 105 return; 106 /* wait 10 milliseconds, other reqs might pop in */ 107 schedule_delayed_work(&wka_port->work, HZ / 100); 108} 109 110static void zfcp_fc_wka_port_init(struct zfcp_wka_port *wka_port, u32 d_id, 111 struct zfcp_adapter *adapter) 112{ 113 init_waitqueue_head(&wka_port->completion_wq); 114 115 wka_port->adapter = adapter; 116 wka_port->d_id = d_id; 117 118 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 119 atomic_set(&wka_port->refcount, 0); 120 mutex_init(&wka_port->mutex); 121 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); 122} 123 124static void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka) 125{ 126 cancel_delayed_work_sync(&wka->work); 127 mutex_lock(&wka->mutex); 128 wka->status = ZFCP_WKA_PORT_OFFLINE; 129 mutex_unlock(&wka->mutex); 130} 131 132void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs) 133{ 134 if (!gs) 135 return; 136 zfcp_fc_wka_port_force_offline(&gs->ms); 137 zfcp_fc_wka_port_force_offline(&gs->ts); 138 zfcp_fc_wka_port_force_offline(&gs->ds); 139 zfcp_fc_wka_port_force_offline(&gs->as); 140 zfcp_fc_wka_port_force_offline(&gs->ks); 141} 142 143static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 144 struct fc_els_rscn_page *page) 145{ 146 unsigned long flags; 147 struct zfcp_adapter *adapter = fsf_req->adapter; 148 struct zfcp_port *port; 149 150 read_lock_irqsave(&adapter->port_list_lock, flags); 151 list_for_each_entry(port, &adapter->port_list, list) { 152 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) 153 zfcp_fc_test_link(port); 154 if (!port->d_id) 155 zfcp_erp_port_reopen(port, 156 ZFCP_STATUS_COMMON_ERP_FAILED, 157 "fcrscn1", NULL); 158 } 159 read_unlock_irqrestore(&adapter->port_list_lock, flags); 160} 161 162static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 163{ 164 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 165 struct fc_els_rscn *head; 166 struct fc_els_rscn_page *page; 167 u16 i; 168 u16 no_entries; 169 unsigned int afmt; 170 171 head = (struct fc_els_rscn *) status_buffer->payload.data; 172 page = (struct fc_els_rscn_page *) head; 173 174 /* see FC-FS */ 175 no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page); 176 177 for (i = 1; i < no_entries; i++) { 178 /* skip head and start with 1st element */ 179 page++; 180 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; 181 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], 182 page); 183 } 184 queue_work(fsf_req->adapter->work_queue, &fsf_req->adapter->scan_work); 185} 186 187static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 188{ 189 unsigned long flags; 190 struct zfcp_adapter *adapter = req->adapter; 191 struct zfcp_port *port; 192 193 read_lock_irqsave(&adapter->port_list_lock, flags); 194 list_for_each_entry(port, &adapter->port_list, list) 195 if (port->wwpn == wwpn) { 196 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); 197 break; 198 } 199 read_unlock_irqrestore(&adapter->port_list_lock, flags); 200} 201 202static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 203{ 204 struct fsf_status_read_buffer *status_buffer; 205 struct fc_els_flogi *plogi; 206 207 status_buffer = (struct fsf_status_read_buffer *) req->data; 208 plogi = (struct fc_els_flogi *) status_buffer->payload.data; 209 zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn); 210} 211 212static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 213{ 214 struct fsf_status_read_buffer *status_buffer = 215 (struct fsf_status_read_buffer *)req->data; 216 struct fc_els_logo *logo = 217 (struct fc_els_logo *) status_buffer->payload.data; 218 219 zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn); 220} 221 222/** 223 * zfcp_fc_incoming_els - handle incoming ELS 224 * @fsf_req - request which contains incoming ELS 225 */ 226void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 227{ 228 struct fsf_status_read_buffer *status_buffer = 229 (struct fsf_status_read_buffer *) fsf_req->data; 230 unsigned int els_type = status_buffer->payload.data[0]; 231 232 zfcp_dbf_san_incoming_els(fsf_req); 233 if (els_type == ELS_PLOGI) 234 zfcp_fc_incoming_plogi(fsf_req); 235 else if (els_type == ELS_LOGO) 236 zfcp_fc_incoming_logo(fsf_req); 237 else if (els_type == ELS_RSCN) 238 zfcp_fc_incoming_rscn(fsf_req); 239} 240 241static void zfcp_fc_ns_handler(unsigned long data) 242{ 243 struct zfcp_fc_ns_handler_data *compl_rec = 244 (struct zfcp_fc_ns_handler_data *) data; 245 246 if (compl_rec->handler) 247 compl_rec->handler(compl_rec->handler_data); 248 249 complete(&compl_rec->done); 250} 251 252static void zfcp_fc_ns_gid_pn_eval(unsigned long data) 253{ 254 struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; 255 struct zfcp_send_ct *ct = &gid_pn->ct; 256 struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); 257 struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); 258 struct zfcp_port *port = gid_pn->port; 259 260 if (ct->status) 261 return; 262 if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) 263 return; 264 265 /* paranoia */ 266 if (ct_iu_req->wwpn != port->wwpn) 267 return; 268 /* looks like a valid d_id */ 269 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; 270} 271 272static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, 273 struct zfcp_gid_pn_data *gid_pn) 274{ 275 struct zfcp_adapter *adapter = port->adapter; 276 struct zfcp_fc_ns_handler_data compl_rec; 277 int ret; 278 279 /* setup parameters for send generic command */ 280 gid_pn->port = port; 281 gid_pn->ct.wka_port = &adapter->gs->ds; 282 gid_pn->ct.handler = zfcp_fc_ns_handler; 283 gid_pn->ct.handler_data = (unsigned long) &compl_rec; 284 gid_pn->ct.req = &gid_pn->req; 285 gid_pn->ct.resp = &gid_pn->resp; 286 sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, 287 sizeof(struct ct_iu_gid_pn_req)); 288 sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, 289 sizeof(struct ct_iu_gid_pn_resp)); 290 291 /* setup nameserver request */ 292 gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; 293 gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 294 gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; 295 gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; 296 gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; 297 gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4; 298 gid_pn->ct_iu_req.wwpn = port->wwpn; 299 300 init_completion(&compl_rec.done); 301 compl_rec.handler = zfcp_fc_ns_gid_pn_eval; 302 compl_rec.handler_data = (unsigned long) gid_pn; 303 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req); 304 if (!ret) 305 wait_for_completion(&compl_rec.done); 306 return ret; 307} 308 309/** 310 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 311 * @port: port where GID_PN request is needed 312 * return: -ENOMEM on error, 0 otherwise 313 */ 314static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) 315{ 316 int ret; 317 struct zfcp_gid_pn_data *gid_pn; 318 struct zfcp_adapter *adapter = port->adapter; 319 320 gid_pn = mempool_alloc(adapter->pool.gid_pn_data, GFP_ATOMIC); 321 if (!gid_pn) 322 return -ENOMEM; 323 324 memset(gid_pn, 0, sizeof(*gid_pn)); 325 326 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 327 if (ret) 328 goto out; 329 330 ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); 331 332 zfcp_fc_wka_port_put(&adapter->gs->ds); 333out: 334 mempool_free(gid_pn, adapter->pool.gid_pn_data); 335 return ret; 336} 337 338void zfcp_fc_port_did_lookup(struct work_struct *work) 339{ 340 int ret; 341 struct zfcp_port *port = container_of(work, struct zfcp_port, 342 gid_pn_work); 343 344 ret = zfcp_fc_ns_gid_pn(port); 345 if (ret) { 346 /* could not issue gid_pn for some reason */ 347 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); 348 goto out; 349 } 350 351 if (!port->d_id) { 352 zfcp_erp_port_failed(port, "fcgpn_2", NULL); 353 goto out; 354 } 355 356 zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); 357out: 358 put_device(&port->sysfs_device); 359} 360 361/** 362 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request 363 * @port: The zfcp_port to lookup the d_id for. 364 */ 365void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) 366{ 367 get_device(&port->sysfs_device); 368 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) 369 put_device(&port->sysfs_device); 370} 371 372/** 373 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 374 * @port: zfcp_port structure 375 * @plogi: plogi payload 376 * 377 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 378 */ 379void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) 380{ 381 if (plogi->fl_wwpn != port->wwpn) { 382 port->d_id = 0; 383 dev_warn(&port->adapter->ccw_device->dev, 384 "A port opened with WWPN 0x%016Lx returned data that " 385 "identifies it as WWPN 0x%016Lx\n", 386 (unsigned long long) port->wwpn, 387 (unsigned long long) plogi->fl_wwpn); 388 return; 389 } 390 391 port->wwnn = plogi->fl_wwnn; 392 port->maxframe_size = plogi->fl_csp.sp_bb_data; 393 394 if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) 395 port->supported_classes |= FC_COS_CLASS1; 396 if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) 397 port->supported_classes |= FC_COS_CLASS2; 398 if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) 399 port->supported_classes |= FC_COS_CLASS3; 400 if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) 401 port->supported_classes |= FC_COS_CLASS4; 402} 403 404static void zfcp_fc_adisc_handler(unsigned long data) 405{ 406 struct zfcp_fc_els_adisc *adisc = (struct zfcp_fc_els_adisc *) data; 407 struct zfcp_port *port = adisc->els.port; 408 struct fc_els_adisc *adisc_resp = &adisc->adisc_resp; 409 410 if (adisc->els.status) { 411 /* request rejected or timed out */ 412 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 413 "fcadh_1", NULL); 414 goto out; 415 } 416 417 if (!port->wwnn) 418 port->wwnn = adisc_resp->adisc_wwnn; 419 420 if ((port->wwpn != adisc_resp->adisc_wwpn) || 421 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { 422 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 423 "fcadh_2", NULL); 424 goto out; 425 } 426 427 /* port is good, unblock rport without going through erp */ 428 zfcp_scsi_schedule_rport_register(port); 429 out: 430 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 431 put_device(&port->sysfs_device); 432 kfree(adisc); 433} 434 435static int zfcp_fc_adisc(struct zfcp_port *port) 436{ 437 struct zfcp_fc_els_adisc *adisc; 438 struct zfcp_adapter *adapter = port->adapter; 439 440 adisc = kzalloc(sizeof(struct zfcp_fc_els_adisc), GFP_ATOMIC); 441 if (!adisc) 442 return -ENOMEM; 443 444 adisc->els.req = &adisc->req; 445 adisc->els.resp = &adisc->resp; 446 sg_init_one(adisc->els.req, &adisc->adisc_req, 447 sizeof(struct fc_els_adisc)); 448 sg_init_one(adisc->els.resp, &adisc->adisc_resp, 449 sizeof(struct fc_els_adisc)); 450 451 adisc->els.adapter = adapter; 452 adisc->els.port = port; 453 adisc->els.d_id = port->d_id; 454 adisc->els.handler = zfcp_fc_adisc_handler; 455 adisc->els.handler_data = (unsigned long) adisc; 456 adisc->els.ls_code = adisc->adisc_req.adisc_cmd = ELS_ADISC; 457 458 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports 459 without FC-AL-2 capability, so we don't set it */ 460 adisc->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host); 461 adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host); 462 hton24(adisc->adisc_req.adisc_port_id, 463 fc_host_port_id(adapter->scsi_host)); 464 465 return zfcp_fsf_send_els(&adisc->els); 466} 467 468void zfcp_fc_link_test_work(struct work_struct *work) 469{ 470 struct zfcp_port *port = 471 container_of(work, struct zfcp_port, test_link_work); 472 int retval; 473 474 get_device(&port->sysfs_device); 475 port->rport_task = RPORT_DEL; 476 zfcp_scsi_rport_work(&port->rport_work); 477 478 /* only issue one test command at one time per port */ 479 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) 480 goto out; 481 482 atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 483 484 retval = zfcp_fc_adisc(port); 485 if (retval == 0) 486 return; 487 488 /* send of ADISC was not possible */ 489 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 490 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); 491 492out: 493 put_device(&port->sysfs_device); 494} 495 496/** 497 * zfcp_fc_test_link - lightweight link test procedure 498 * @port: port to be tested 499 * 500 * Test status of a link to a remote port using the ELS command ADISC. 501 * If there is a problem with the remote port, error recovery steps 502 * will be triggered. 503 */ 504void zfcp_fc_test_link(struct zfcp_port *port) 505{ 506 get_device(&port->sysfs_device); 507 if (!queue_work(port->adapter->work_queue, &port->test_link_work)) 508 put_device(&port->sysfs_device); 509} 510 511static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft, int buf_num) 512{ 513 struct scatterlist *sg = &gpn_ft->sg_req; 514 515 kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); 516 zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); 517 518 kfree(gpn_ft); 519} 520 521static struct zfcp_gpn_ft *zfcp_alloc_sg_env(int buf_num) 522{ 523 struct zfcp_gpn_ft *gpn_ft; 524 struct ct_iu_gpn_ft_req *req; 525 526 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 527 if (!gpn_ft) 528 return NULL; 529 530 req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); 531 if (!req) { 532 kfree(gpn_ft); 533 gpn_ft = NULL; 534 goto out; 535 } 536 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 537 538 if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { 539 zfcp_free_sg_env(gpn_ft, buf_num); 540 gpn_ft = NULL; 541 } 542out: 543 return gpn_ft; 544} 545 546 547static int zfcp_fc_send_gpn_ft(struct zfcp_gpn_ft *gpn_ft, 548 struct zfcp_adapter *adapter, int max_bytes) 549{ 550 struct zfcp_send_ct *ct = &gpn_ft->ct; 551 struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 552 struct zfcp_fc_ns_handler_data compl_rec; 553 int ret; 554 555 /* prepare CT IU for GPN_FT */ 556 req->header.revision = ZFCP_CT_REVISION; 557 req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 558 req->header.gs_subtype = ZFCP_CT_NAME_SERVER; 559 req->header.options = ZFCP_CT_SYNCHRONOUS; 560 req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; 561 req->header.max_res_size = max_bytes / 4; 562 req->flags = 0; 563 req->domain_id_scope = 0; 564 req->area_id_scope = 0; 565 req->fc4_type = ZFCP_CT_SCSI_FCP; 566 567 /* prepare zfcp_send_ct */ 568 ct->wka_port = &adapter->gs->ds; 569 ct->handler = zfcp_fc_ns_handler; 570 ct->handler_data = (unsigned long)&compl_rec; 571 ct->req = &gpn_ft->sg_req; 572 ct->resp = gpn_ft->sg_resp; 573 574 init_completion(&compl_rec.done); 575 compl_rec.handler = NULL; 576 ret = zfcp_fsf_send_ct(ct, NULL); 577 if (!ret) 578 wait_for_completion(&compl_rec.done); 579 return ret; 580} 581 582static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) 583{ 584 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) 585 return; 586 587 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 588 589 if ((port->supported_classes != 0) || 590 !list_empty(&port->unit_list)) 591 return; 592 593 list_move_tail(&port->list, lh); 594} 595 596static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries) 597{ 598 struct zfcp_send_ct *ct = &gpn_ft->ct; 599 struct scatterlist *sg = gpn_ft->sg_resp; 600 struct ct_hdr *hdr = sg_virt(sg); 601 struct gpn_ft_resp_acc *acc = sg_virt(sg); 602 struct zfcp_adapter *adapter = ct->wka_port->adapter; 603 struct zfcp_port *port, *tmp; 604 unsigned long flags; 605 LIST_HEAD(remove_lh); 606 u32 d_id; 607 int ret = 0, x, last = 0; 608 609 if (ct->status) 610 return -EIO; 611 612 if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { 613 if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) 614 return -EAGAIN; /* might be a temporary condition */ 615 return -EIO; 616 } 617 618 if (hdr->max_res_size) { 619 dev_warn(&adapter->ccw_device->dev, 620 "The name server reported %d words residual data\n", 621 hdr->max_res_size); 622 return -E2BIG; 623 } 624 625 /* first entry is the header */ 626 for (x = 1; x < max_entries && !last; x++) { 627 if (x % (ZFCP_GPN_FT_ENTRIES + 1)) 628 acc++; 629 else 630 acc = sg_virt(++sg); 631 632 last = acc->control & 0x80; 633 d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | 634 acc->port_id[2]; 635 636 /* don't attach ports with a well known address */ 637 if ((d_id & ZFCP_DID_WKA) == ZFCP_DID_WKA) 638 continue; 639 /* skip the adapter's port and known remote ports */ 640 if (acc->wwpn == fc_host_port_name(adapter->scsi_host)) 641 continue; 642 643 port = zfcp_port_enqueue(adapter, acc->wwpn, 644 ZFCP_STATUS_COMMON_NOESC, d_id); 645 if (!IS_ERR(port)) 646 zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); 647 else if (PTR_ERR(port) != -EEXIST) 648 ret = PTR_ERR(port); 649 } 650 651 zfcp_erp_wait(adapter); 652 write_lock_irqsave(&adapter->port_list_lock, flags); 653 list_for_each_entry_safe(port, tmp, &adapter->port_list, list) 654 zfcp_fc_validate_port(port, &remove_lh); 655 write_unlock_irqrestore(&adapter->port_list_lock, flags); 656 657 list_for_each_entry_safe(port, tmp, &remove_lh, list) { 658 zfcp_erp_port_shutdown(port, 0, "fcegpf2", NULL); 659 zfcp_device_unregister(&port->sysfs_device, 660 &zfcp_sysfs_port_attrs); 661 } 662 663 return ret; 664} 665 666/** 667 * zfcp_fc_scan_ports - scan remote ports and attach new ports 668 * @work: reference to scheduled work 669 */ 670void zfcp_fc_scan_ports(struct work_struct *work) 671{ 672 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, 673 scan_work); 674 int ret, i; 675 struct zfcp_gpn_ft *gpn_ft; 676 int chain, max_entries, buf_num, max_bytes; 677 678 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; 679 buf_num = chain ? ZFCP_GPN_FT_BUFFERS : 1; 680 max_entries = chain ? ZFCP_GPN_FT_MAX_ENTRIES : ZFCP_GPN_FT_ENTRIES; 681 max_bytes = chain ? ZFCP_GPN_FT_MAX_SIZE : ZFCP_CT_SIZE_ONE_PAGE; 682 683 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && 684 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) 685 return; 686 687 if (zfcp_fc_wka_port_get(&adapter->gs->ds)) 688 return; 689 690 gpn_ft = zfcp_alloc_sg_env(buf_num); 691 if (!gpn_ft) 692 goto out; 693 694 for (i = 0; i < 3; i++) { 695 ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); 696 if (!ret) { 697 ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries); 698 if (ret == -EAGAIN) 699 ssleep(1); 700 else 701 break; 702 } 703 } 704 zfcp_free_sg_env(gpn_ft, buf_num); 705out: 706 zfcp_fc_wka_port_put(&adapter->gs->ds); 707} 708 709 710struct zfcp_els_fc_job { 711 struct zfcp_send_els els; 712 struct fc_bsg_job *job; 713}; 714 715static void zfcp_fc_generic_els_handler(unsigned long data) 716{ 717 struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data; 718 struct fc_bsg_job *job = els_fc_job->job; 719 struct fc_bsg_reply *reply = job->reply; 720 721 if (els_fc_job->els.status) { 722 /* request rejected or timed out */ 723 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT; 724 goto out; 725 } 726 727 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; 728 reply->reply_payload_rcv_len = job->reply_payload.payload_len; 729 730out: 731 job->state_flags = FC_RQST_STATE_DONE; 732 job->job_done(job); 733 kfree(els_fc_job); 734} 735 736int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job) 737{ 738 struct zfcp_els_fc_job *els_fc_job; 739 struct fc_rport *rport = job->rport; 740 struct Scsi_Host *shost; 741 struct zfcp_adapter *adapter; 742 struct zfcp_port *port; 743 u8 *port_did; 744 745 shost = rport ? rport_to_shost(rport) : job->shost; 746 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 747 748 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 749 return -EINVAL; 750 751 els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL); 752 if (!els_fc_job) 753 return -ENOMEM; 754 755 els_fc_job->els.adapter = adapter; 756 if (rport) { 757 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 758 if (!port) { 759 kfree(els_fc_job); 760 return -EINVAL; 761 } 762 763 els_fc_job->els.d_id = port->d_id; 764 put_device(&port->sysfs_device); 765 } else { 766 port_did = job->request->rqst_data.h_els.port_id; 767 els_fc_job->els.d_id = (port_did[0] << 16) + 768 (port_did[1] << 8) + port_did[2]; 769 } 770 771 els_fc_job->els.req = job->request_payload.sg_list; 772 els_fc_job->els.resp = job->reply_payload.sg_list; 773 els_fc_job->els.handler = zfcp_fc_generic_els_handler; 774 els_fc_job->els.handler_data = (unsigned long) els_fc_job; 775 els_fc_job->job = job; 776 777 return zfcp_fsf_send_els(&els_fc_job->els); 778} 779 780struct zfcp_ct_fc_job { 781 struct zfcp_send_ct ct; 782 struct fc_bsg_job *job; 783}; 784 785static void zfcp_fc_generic_ct_handler(unsigned long data) 786{ 787 struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data; 788 struct fc_bsg_job *job = ct_fc_job->job; 789 790 job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ? 791 FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK; 792 job->reply->reply_payload_rcv_len = job->reply_payload.payload_len; 793 job->state_flags = FC_RQST_STATE_DONE; 794 job->job_done(job); 795 796 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 797 798 kfree(ct_fc_job); 799} 800 801int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job) 802{ 803 int ret; 804 u8 gs_type; 805 struct fc_rport *rport = job->rport; 806 struct Scsi_Host *shost; 807 struct zfcp_adapter *adapter; 808 struct zfcp_ct_fc_job *ct_fc_job; 809 u32 preamble_word1; 810 811 shost = rport ? rport_to_shost(rport) : job->shost; 812 813 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 814 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 815 return -EINVAL; 816 817 ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL); 818 if (!ct_fc_job) 819 return -ENOMEM; 820 821 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; 822 gs_type = (preamble_word1 & 0xff000000) >> 24; 823 824 switch (gs_type) { 825 case FC_FST_ALIAS: 826 ct_fc_job->ct.wka_port = &adapter->gs->as; 827 break; 828 case FC_FST_MGMT: 829 ct_fc_job->ct.wka_port = &adapter->gs->ms; 830 break; 831 case FC_FST_TIME: 832 ct_fc_job->ct.wka_port = &adapter->gs->ts; 833 break; 834 case FC_FST_DIR: 835 ct_fc_job->ct.wka_port = &adapter->gs->ds; 836 break; 837 default: 838 kfree(ct_fc_job); 839 return -EINVAL; /* no such service */ 840 } 841 842 ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port); 843 if (ret) { 844 kfree(ct_fc_job); 845 return ret; 846 } 847 848 ct_fc_job->ct.req = job->request_payload.sg_list; 849 ct_fc_job->ct.resp = job->reply_payload.sg_list; 850 ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler; 851 ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job; 852 ct_fc_job->ct.completion = NULL; 853 ct_fc_job->job = job; 854 855 ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL); 856 if (ret) { 857 kfree(ct_fc_job); 858 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 859 } 860 return ret; 861} 862 863int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) 864{ 865 struct zfcp_wka_ports *wka_ports; 866 867 wka_ports = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL); 868 if (!wka_ports) 869 return -ENOMEM; 870 871 adapter->gs = wka_ports; 872 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); 873 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); 874 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); 875 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); 876 zfcp_fc_wka_port_init(&wka_ports->ks, FC_FID_SEC_KEY, adapter); 877 878 return 0; 879} 880 881void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) 882{ 883 kfree(adapter->gs); 884 adapter->gs = NULL; 885} 886 887