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 "zfcp_ext.h" 13 14 enum rscn_address_format { 15 RSCN_PORT_ADDRESS = 0x0, 16 RSCN_AREA_ADDRESS = 0x1, 17 RSCN_DOMAIN_ADDRESS = 0x2, 18 RSCN_FABRIC_ADDRESS = 0x3, 19 }; 20 21 static u32 rscn_range_mask[] = { 22 [RSCN_PORT_ADDRESS] = 0xFFFFFF, 23 [RSCN_AREA_ADDRESS] = 0xFFFF00, 24 [RSCN_DOMAIN_ADDRESS] = 0xFF0000, 25 [RSCN_FABRIC_ADDRESS] = 0x000000, 26 }; 27 28 struct gpn_ft_resp_acc { 29 u8 control; 30 u8 port_id[3]; 31 u8 reserved[4]; 32 u64 wwpn; 33 } __attribute__ ((packed)); 34 35 #define ZFCP_CT_SIZE_ONE_PAGE (PAGE_SIZE - sizeof(struct ct_hdr)) 36 #define ZFCP_GPN_FT_ENTRIES (ZFCP_CT_SIZE_ONE_PAGE \ 37 / sizeof(struct gpn_ft_resp_acc)) 38 #define ZFCP_GPN_FT_BUFFERS 4 39 #define ZFCP_GPN_FT_MAX_SIZE (ZFCP_GPN_FT_BUFFERS * PAGE_SIZE \ 40 - sizeof(struct ct_hdr)) 41 #define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) 42 43 struct ct_iu_gpn_ft_resp { 44 struct ct_hdr header; 45 struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; 46 } __attribute__ ((packed)); 47 48 struct zfcp_gpn_ft { 49 struct zfcp_send_ct ct; 50 struct scatterlist sg_req; 51 struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; 52 }; 53 54 struct zfcp_fc_ns_handler_data { 55 struct completion done; 56 void (*handler)(unsigned long); 57 unsigned long handler_data; 58 }; 59 60 static int zfcp_fc_wka_port_get(struct zfcp_wka_port *wka_port) 61 { 62 if (mutex_lock_interruptible(&wka_port->mutex)) 63 return -ERESTARTSYS; 64 65 if (wka_port->status == ZFCP_WKA_PORT_OFFLINE || 66 wka_port->status == ZFCP_WKA_PORT_CLOSING) { 67 wka_port->status = ZFCP_WKA_PORT_OPENING; 68 if (zfcp_fsf_open_wka_port(wka_port)) 69 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 70 } 71 72 mutex_unlock(&wka_port->mutex); 73 74 wait_event(wka_port->completion_wq, 75 wka_port->status == ZFCP_WKA_PORT_ONLINE || 76 wka_port->status == ZFCP_WKA_PORT_OFFLINE); 77 78 if (wka_port->status == ZFCP_WKA_PORT_ONLINE) { 79 atomic_inc(&wka_port->refcount); 80 return 0; 81 } 82 return -EIO; 83 } 84 85 static void zfcp_fc_wka_port_offline(struct work_struct *work) 86 { 87 struct delayed_work *dw = to_delayed_work(work); 88 struct zfcp_wka_port *wka_port = 89 container_of(dw, struct zfcp_wka_port, work); 90 91 mutex_lock(&wka_port->mutex); 92 if ((atomic_read(&wka_port->refcount) != 0) || 93 (wka_port->status != ZFCP_WKA_PORT_ONLINE)) 94 goto out; 95 96 wka_port->status = ZFCP_WKA_PORT_CLOSING; 97 if (zfcp_fsf_close_wka_port(wka_port)) { 98 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 99 wake_up(&wka_port->completion_wq); 100 } 101 out: 102 mutex_unlock(&wka_port->mutex); 103 } 104 105 static void zfcp_fc_wka_port_put(struct zfcp_wka_port *wka_port) 106 { 107 if (atomic_dec_return(&wka_port->refcount) != 0) 108 return; 109 /* wait 10 milliseconds, other reqs might pop in */ 110 schedule_delayed_work(&wka_port->work, HZ / 100); 111 } 112 113 static void zfcp_fc_wka_port_init(struct zfcp_wka_port *wka_port, u32 d_id, 114 struct zfcp_adapter *adapter) 115 { 116 init_waitqueue_head(&wka_port->completion_wq); 117 118 wka_port->adapter = adapter; 119 wka_port->d_id = d_id; 120 121 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 122 atomic_set(&wka_port->refcount, 0); 123 mutex_init(&wka_port->mutex); 124 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); 125 } 126 127 static void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka) 128 { 129 cancel_delayed_work_sync(&wka->work); 130 mutex_lock(&wka->mutex); 131 wka->status = ZFCP_WKA_PORT_OFFLINE; 132 mutex_unlock(&wka->mutex); 133 } 134 135 void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs) 136 { 137 zfcp_fc_wka_port_force_offline(&gs->ms); 138 zfcp_fc_wka_port_force_offline(&gs->ts); 139 zfcp_fc_wka_port_force_offline(&gs->ds); 140 zfcp_fc_wka_port_force_offline(&gs->as); 141 zfcp_fc_wka_port_force_offline(&gs->ks); 142 } 143 144 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 145 struct fcp_rscn_element *elem) 146 { 147 unsigned long flags; 148 struct zfcp_port *port; 149 150 read_lock_irqsave(&zfcp_data.config_lock, flags); 151 list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) { 152 if ((port->d_id & range) == (elem->nport_did & 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 } 159 160 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 161 } 162 163 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 164 { 165 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 166 struct fcp_rscn_head *fcp_rscn_head; 167 struct fcp_rscn_element *fcp_rscn_element; 168 u16 i; 169 u16 no_entries; 170 u32 range_mask; 171 172 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; 173 fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; 174 175 /* see FC-FS */ 176 no_entries = fcp_rscn_head->payload_len / 177 sizeof(struct fcp_rscn_element); 178 179 for (i = 1; i < no_entries; i++) { 180 /* skip head and start with 1st element */ 181 fcp_rscn_element++; 182 range_mask = rscn_range_mask[fcp_rscn_element->addr_format]; 183 _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); 184 } 185 schedule_work(&fsf_req->adapter->scan_work); 186 } 187 188 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 189 { 190 struct zfcp_adapter *adapter = req->adapter; 191 struct zfcp_port *port; 192 unsigned long flags; 193 194 read_lock_irqsave(&zfcp_data.config_lock, flags); 195 list_for_each_entry(port, &adapter->port_list_head, list) 196 if (port->wwpn == wwpn) 197 break; 198 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 199 200 if (port && (port->wwpn == wwpn)) 201 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); 202 } 203 204 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 205 { 206 struct fsf_status_read_buffer *status_buffer = 207 (struct fsf_status_read_buffer *)req->data; 208 struct fsf_plogi *els_plogi = 209 (struct fsf_plogi *) status_buffer->payload.data; 210 211 zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); 212 } 213 214 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 215 { 216 struct fsf_status_read_buffer *status_buffer = 217 (struct fsf_status_read_buffer *)req->data; 218 struct fcp_logo *els_logo = 219 (struct fcp_logo *) status_buffer->payload.data; 220 221 zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); 222 } 223 224 /** 225 * zfcp_fc_incoming_els - handle incoming ELS 226 * @fsf_req - request which contains incoming ELS 227 */ 228 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 229 { 230 struct fsf_status_read_buffer *status_buffer = 231 (struct fsf_status_read_buffer *) fsf_req->data; 232 unsigned int els_type = status_buffer->payload.data[0]; 233 234 zfcp_dbf_san_incoming_els(fsf_req); 235 if (els_type == LS_PLOGI) 236 zfcp_fc_incoming_plogi(fsf_req); 237 else if (els_type == LS_LOGO) 238 zfcp_fc_incoming_logo(fsf_req); 239 else if (els_type == LS_RSCN) 240 zfcp_fc_incoming_rscn(fsf_req); 241 } 242 243 static void zfcp_fc_ns_handler(unsigned long data) 244 { 245 struct zfcp_fc_ns_handler_data *compl_rec = 246 (struct zfcp_fc_ns_handler_data *) data; 247 248 if (compl_rec->handler) 249 compl_rec->handler(compl_rec->handler_data); 250 251 complete(&compl_rec->done); 252 } 253 254 static void zfcp_fc_ns_gid_pn_eval(unsigned long data) 255 { 256 struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; 257 struct zfcp_send_ct *ct = &gid_pn->ct; 258 struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); 259 struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); 260 struct zfcp_port *port = gid_pn->port; 261 262 if (ct->status) 263 return; 264 if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) 265 return; 266 267 /* paranoia */ 268 if (ct_iu_req->wwpn != port->wwpn) 269 return; 270 /* looks like a valid d_id */ 271 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; 272 } 273 274 static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, 275 struct zfcp_gid_pn_data *gid_pn) 276 { 277 struct zfcp_adapter *adapter = port->adapter; 278 struct zfcp_fc_ns_handler_data compl_rec; 279 int ret; 280 281 /* setup parameters for send generic command */ 282 gid_pn->port = port; 283 gid_pn->ct.wka_port = &adapter->gs->ds; 284 gid_pn->ct.handler = zfcp_fc_ns_handler; 285 gid_pn->ct.handler_data = (unsigned long) &compl_rec; 286 gid_pn->ct.req = &gid_pn->req; 287 gid_pn->ct.resp = &gid_pn->resp; 288 sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, 289 sizeof(struct ct_iu_gid_pn_req)); 290 sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, 291 sizeof(struct ct_iu_gid_pn_resp)); 292 293 /* setup nameserver request */ 294 gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; 295 gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 296 gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; 297 gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; 298 gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; 299 gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4; 300 gid_pn->ct_iu_req.wwpn = port->wwpn; 301 302 init_completion(&compl_rec.done); 303 compl_rec.handler = zfcp_fc_ns_gid_pn_eval; 304 compl_rec.handler_data = (unsigned long) gid_pn; 305 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req); 306 if (!ret) 307 wait_for_completion(&compl_rec.done); 308 return ret; 309 } 310 311 /** 312 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 313 * @port: port where GID_PN request is needed 314 * return: -ENOMEM on error, 0 otherwise 315 */ 316 static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) 317 { 318 int ret; 319 struct zfcp_gid_pn_data *gid_pn; 320 struct zfcp_adapter *adapter = port->adapter; 321 322 gid_pn = mempool_alloc(adapter->pool.gid_pn_data, GFP_ATOMIC); 323 if (!gid_pn) 324 return -ENOMEM; 325 326 memset(gid_pn, 0, sizeof(*gid_pn)); 327 328 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 329 if (ret) 330 goto out; 331 332 ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); 333 334 zfcp_fc_wka_port_put(&adapter->gs->ds); 335 out: 336 mempool_free(gid_pn, adapter->pool.gid_pn_data); 337 return ret; 338 } 339 340 void zfcp_fc_port_did_lookup(struct work_struct *work) 341 { 342 int ret; 343 struct zfcp_port *port = container_of(work, struct zfcp_port, 344 gid_pn_work); 345 346 ret = zfcp_fc_ns_gid_pn(port); 347 if (ret) { 348 /* could not issue gid_pn for some reason */ 349 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); 350 goto out; 351 } 352 353 if (!port->d_id) { 354 zfcp_erp_port_failed(port, "fcgpn_2", NULL); 355 goto out; 356 } 357 358 zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); 359 out: 360 zfcp_port_put(port); 361 } 362 363 /** 364 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 365 * @port: zfcp_port structure 366 * @plogi: plogi payload 367 * 368 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 369 */ 370 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) 371 { 372 port->maxframe_size = plogi->serv_param.common_serv_param[7] | 373 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); 374 if (plogi->serv_param.class1_serv_param[0] & 0x80) 375 port->supported_classes |= FC_COS_CLASS1; 376 if (plogi->serv_param.class2_serv_param[0] & 0x80) 377 port->supported_classes |= FC_COS_CLASS2; 378 if (plogi->serv_param.class3_serv_param[0] & 0x80) 379 port->supported_classes |= FC_COS_CLASS3; 380 if (plogi->serv_param.class4_serv_param[0] & 0x80) 381 port->supported_classes |= FC_COS_CLASS4; 382 } 383 384 struct zfcp_els_adisc { 385 struct zfcp_send_els els; 386 struct scatterlist req; 387 struct scatterlist resp; 388 struct zfcp_ls_adisc ls_adisc; 389 struct zfcp_ls_adisc ls_adisc_acc; 390 }; 391 392 static void zfcp_fc_adisc_handler(unsigned long data) 393 { 394 struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; 395 struct zfcp_port *port = adisc->els.port; 396 struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc; 397 398 if (adisc->els.status) { 399 /* request rejected or timed out */ 400 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 401 "fcadh_1", NULL); 402 goto out; 403 } 404 405 if (!port->wwnn) 406 port->wwnn = ls_adisc->wwnn; 407 408 if ((port->wwpn != ls_adisc->wwpn) || 409 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { 410 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 411 "fcadh_2", NULL); 412 goto out; 413 } 414 415 /* port is good, unblock rport without going through erp */ 416 zfcp_scsi_schedule_rport_register(port); 417 out: 418 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 419 zfcp_port_put(port); 420 kfree(adisc); 421 } 422 423 static int zfcp_fc_adisc(struct zfcp_port *port) 424 { 425 struct zfcp_els_adisc *adisc; 426 struct zfcp_adapter *adapter = port->adapter; 427 428 adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); 429 if (!adisc) 430 return -ENOMEM; 431 432 adisc->els.req = &adisc->req; 433 adisc->els.resp = &adisc->resp; 434 sg_init_one(adisc->els.req, &adisc->ls_adisc, 435 sizeof(struct zfcp_ls_adisc)); 436 sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, 437 sizeof(struct zfcp_ls_adisc)); 438 439 adisc->els.adapter = adapter; 440 adisc->els.port = port; 441 adisc->els.d_id = port->d_id; 442 adisc->els.handler = zfcp_fc_adisc_handler; 443 adisc->els.handler_data = (unsigned long) adisc; 444 adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; 445 446 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports 447 without FC-AL-2 capability, so we don't set it */ 448 adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); 449 adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); 450 adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); 451 452 return zfcp_fsf_send_els(&adisc->els); 453 } 454 455 void zfcp_fc_link_test_work(struct work_struct *work) 456 { 457 struct zfcp_port *port = 458 container_of(work, struct zfcp_port, test_link_work); 459 int retval; 460 461 zfcp_port_get(port); 462 port->rport_task = RPORT_DEL; 463 zfcp_scsi_rport_work(&port->rport_work); 464 465 /* only issue one test command at one time per port */ 466 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) 467 goto out; 468 469 atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 470 471 retval = zfcp_fc_adisc(port); 472 if (retval == 0) 473 return; 474 475 /* send of ADISC was not possible */ 476 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 477 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); 478 479 out: 480 zfcp_port_put(port); 481 } 482 483 /** 484 * zfcp_fc_test_link - lightweight link test procedure 485 * @port: port to be tested 486 * 487 * Test status of a link to a remote port using the ELS command ADISC. 488 * If there is a problem with the remote port, error recovery steps 489 * will be triggered. 490 */ 491 void zfcp_fc_test_link(struct zfcp_port *port) 492 { 493 zfcp_port_get(port); 494 if (!queue_work(port->adapter->work_queue, &port->test_link_work)) 495 zfcp_port_put(port); 496 } 497 498 static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft, int buf_num) 499 { 500 struct scatterlist *sg = &gpn_ft->sg_req; 501 502 kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); 503 zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); 504 505 kfree(gpn_ft); 506 } 507 508 static struct zfcp_gpn_ft *zfcp_alloc_sg_env(int buf_num) 509 { 510 struct zfcp_gpn_ft *gpn_ft; 511 struct ct_iu_gpn_ft_req *req; 512 513 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 514 if (!gpn_ft) 515 return NULL; 516 517 req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); 518 if (!req) { 519 kfree(gpn_ft); 520 gpn_ft = NULL; 521 goto out; 522 } 523 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 524 525 if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { 526 zfcp_free_sg_env(gpn_ft, buf_num); 527 gpn_ft = NULL; 528 } 529 out: 530 return gpn_ft; 531 } 532 533 534 static int zfcp_fc_send_gpn_ft(struct zfcp_gpn_ft *gpn_ft, 535 struct zfcp_adapter *adapter, int max_bytes) 536 { 537 struct zfcp_send_ct *ct = &gpn_ft->ct; 538 struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 539 struct zfcp_fc_ns_handler_data compl_rec; 540 int ret; 541 542 /* prepare CT IU for GPN_FT */ 543 req->header.revision = ZFCP_CT_REVISION; 544 req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 545 req->header.gs_subtype = ZFCP_CT_NAME_SERVER; 546 req->header.options = ZFCP_CT_SYNCHRONOUS; 547 req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; 548 req->header.max_res_size = max_bytes / 4; 549 req->flags = 0; 550 req->domain_id_scope = 0; 551 req->area_id_scope = 0; 552 req->fc4_type = ZFCP_CT_SCSI_FCP; 553 554 /* prepare zfcp_send_ct */ 555 ct->wka_port = &adapter->gs->ds; 556 ct->handler = zfcp_fc_ns_handler; 557 ct->handler_data = (unsigned long)&compl_rec; 558 ct->req = &gpn_ft->sg_req; 559 ct->resp = gpn_ft->sg_resp; 560 561 init_completion(&compl_rec.done); 562 compl_rec.handler = NULL; 563 ret = zfcp_fsf_send_ct(ct, NULL); 564 if (!ret) 565 wait_for_completion(&compl_rec.done); 566 return ret; 567 } 568 569 static void zfcp_fc_validate_port(struct zfcp_port *port) 570 { 571 struct zfcp_adapter *adapter = port->adapter; 572 573 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) 574 return; 575 576 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 577 578 if ((port->supported_classes != 0) || 579 !list_empty(&port->unit_list_head)) { 580 zfcp_port_put(port); 581 return; 582 } 583 zfcp_erp_port_shutdown(port, 0, "fcpval1", NULL); 584 zfcp_erp_wait(adapter); 585 zfcp_port_put(port); 586 zfcp_port_dequeue(port); 587 } 588 589 static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries) 590 { 591 struct zfcp_send_ct *ct = &gpn_ft->ct; 592 struct scatterlist *sg = gpn_ft->sg_resp; 593 struct ct_hdr *hdr = sg_virt(sg); 594 struct gpn_ft_resp_acc *acc = sg_virt(sg); 595 struct zfcp_adapter *adapter = ct->wka_port->adapter; 596 struct zfcp_port *port, *tmp; 597 u32 d_id; 598 int ret = 0, x, last = 0; 599 600 if (ct->status) 601 return -EIO; 602 603 if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { 604 if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) 605 return -EAGAIN; /* might be a temporary condition */ 606 return -EIO; 607 } 608 609 if (hdr->max_res_size) { 610 dev_warn(&adapter->ccw_device->dev, 611 "The name server reported %d words residual data\n", 612 hdr->max_res_size); 613 return -E2BIG; 614 } 615 616 mutex_lock(&zfcp_data.config_mutex); 617 618 /* first entry is the header */ 619 for (x = 1; x < max_entries && !last; x++) { 620 if (x % (ZFCP_GPN_FT_ENTRIES + 1)) 621 acc++; 622 else 623 acc = sg_virt(++sg); 624 625 last = acc->control & 0x80; 626 d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | 627 acc->port_id[2]; 628 629 /* don't attach ports with a well known address */ 630 if ((d_id & ZFCP_DID_WKA) == ZFCP_DID_WKA) 631 continue; 632 /* skip the adapter's port and known remote ports */ 633 if (acc->wwpn == fc_host_port_name(adapter->scsi_host)) 634 continue; 635 port = zfcp_get_port_by_wwpn(adapter, acc->wwpn); 636 if (port) 637 continue; 638 639 port = zfcp_port_enqueue(adapter, acc->wwpn, 640 ZFCP_STATUS_COMMON_NOESC, d_id); 641 if (IS_ERR(port)) 642 ret = PTR_ERR(port); 643 else 644 zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); 645 } 646 647 zfcp_erp_wait(adapter); 648 list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list) 649 zfcp_fc_validate_port(port); 650 mutex_unlock(&zfcp_data.config_mutex); 651 return ret; 652 } 653 654 /** 655 * zfcp_fc_scan_ports - scan remote ports and attach new ports 656 * @adapter: pointer to struct zfcp_adapter 657 */ 658 int zfcp_fc_scan_ports(struct zfcp_adapter *adapter) 659 { 660 int ret, i; 661 struct zfcp_gpn_ft *gpn_ft; 662 int chain, max_entries, buf_num, max_bytes; 663 664 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; 665 buf_num = chain ? ZFCP_GPN_FT_BUFFERS : 1; 666 max_entries = chain ? ZFCP_GPN_FT_MAX_ENTRIES : ZFCP_GPN_FT_ENTRIES; 667 max_bytes = chain ? ZFCP_GPN_FT_MAX_SIZE : ZFCP_CT_SIZE_ONE_PAGE; 668 669 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && 670 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) 671 return 0; 672 673 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 674 if (ret) 675 return ret; 676 677 gpn_ft = zfcp_alloc_sg_env(buf_num); 678 if (!gpn_ft) { 679 ret = -ENOMEM; 680 goto out; 681 } 682 683 for (i = 0; i < 3; i++) { 684 ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); 685 if (!ret) { 686 ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries); 687 if (ret == -EAGAIN) 688 ssleep(1); 689 else 690 break; 691 } 692 } 693 zfcp_free_sg_env(gpn_ft, buf_num); 694 out: 695 zfcp_fc_wka_port_put(&adapter->gs->ds); 696 return ret; 697 } 698 699 700 void _zfcp_fc_scan_ports_later(struct work_struct *work) 701 { 702 zfcp_fc_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); 703 } 704 705 struct zfcp_els_fc_job { 706 struct zfcp_send_els els; 707 struct fc_bsg_job *job; 708 }; 709 710 static void zfcp_fc_generic_els_handler(unsigned long data) 711 { 712 struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data; 713 struct fc_bsg_job *job = els_fc_job->job; 714 struct fc_bsg_reply *reply = job->reply; 715 716 if (els_fc_job->els.status) { 717 /* request rejected or timed out */ 718 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT; 719 goto out; 720 } 721 722 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; 723 reply->reply_payload_rcv_len = job->reply_payload.payload_len; 724 725 out: 726 job->state_flags = FC_RQST_STATE_DONE; 727 job->job_done(job); 728 kfree(els_fc_job); 729 } 730 731 int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job) 732 { 733 struct zfcp_els_fc_job *els_fc_job; 734 struct fc_rport *rport = job->rport; 735 struct Scsi_Host *shost; 736 struct zfcp_adapter *adapter; 737 struct zfcp_port *port; 738 u8 *port_did; 739 740 shost = rport ? rport_to_shost(rport) : job->shost; 741 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 742 743 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 744 return -EINVAL; 745 746 els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL); 747 if (!els_fc_job) 748 return -ENOMEM; 749 750 els_fc_job->els.adapter = adapter; 751 if (rport) { 752 read_lock_irq(&zfcp_data.config_lock); 753 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 754 if (port) 755 els_fc_job->els.d_id = port->d_id; 756 read_unlock_irq(&zfcp_data.config_lock); 757 if (!port) { 758 kfree(els_fc_job); 759 return -EINVAL; 760 } 761 } else { 762 port_did = job->request->rqst_data.h_els.port_id; 763 els_fc_job->els.d_id = (port_did[0] << 16) + 764 (port_did[1] << 8) + port_did[2]; 765 } 766 767 els_fc_job->els.req = job->request_payload.sg_list; 768 els_fc_job->els.resp = job->reply_payload.sg_list; 769 els_fc_job->els.handler = zfcp_fc_generic_els_handler; 770 els_fc_job->els.handler_data = (unsigned long) els_fc_job; 771 els_fc_job->job = job; 772 773 return zfcp_fsf_send_els(&els_fc_job->els); 774 } 775 776 struct zfcp_ct_fc_job { 777 struct zfcp_send_ct ct; 778 struct fc_bsg_job *job; 779 }; 780 781 static void zfcp_fc_generic_ct_handler(unsigned long data) 782 { 783 struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data; 784 struct fc_bsg_job *job = ct_fc_job->job; 785 786 job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ? 787 FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK; 788 job->reply->reply_payload_rcv_len = job->reply_payload.payload_len; 789 job->state_flags = FC_RQST_STATE_DONE; 790 job->job_done(job); 791 792 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 793 794 kfree(ct_fc_job); 795 } 796 797 int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job) 798 { 799 int ret; 800 u8 gs_type; 801 struct fc_rport *rport = job->rport; 802 struct Scsi_Host *shost; 803 struct zfcp_adapter *adapter; 804 struct zfcp_ct_fc_job *ct_fc_job; 805 u32 preamble_word1; 806 807 shost = rport ? rport_to_shost(rport) : job->shost; 808 809 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 810 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 811 return -EINVAL; 812 813 ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL); 814 if (!ct_fc_job) 815 return -ENOMEM; 816 817 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; 818 gs_type = (preamble_word1 & 0xff000000) >> 24; 819 820 switch (gs_type) { 821 case FC_FST_ALIAS: 822 ct_fc_job->ct.wka_port = &adapter->gs->as; 823 break; 824 case FC_FST_MGMT: 825 ct_fc_job->ct.wka_port = &adapter->gs->ms; 826 break; 827 case FC_FST_TIME: 828 ct_fc_job->ct.wka_port = &adapter->gs->ts; 829 break; 830 case FC_FST_DIR: 831 ct_fc_job->ct.wka_port = &adapter->gs->ds; 832 break; 833 default: 834 kfree(ct_fc_job); 835 return -EINVAL; /* no such service */ 836 } 837 838 ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port); 839 if (ret) { 840 kfree(ct_fc_job); 841 return ret; 842 } 843 844 ct_fc_job->ct.req = job->request_payload.sg_list; 845 ct_fc_job->ct.resp = job->reply_payload.sg_list; 846 ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler; 847 ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job; 848 ct_fc_job->ct.completion = NULL; 849 ct_fc_job->job = job; 850 851 ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL); 852 if (ret) { 853 kfree(ct_fc_job); 854 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 855 } 856 return ret; 857 } 858 859 int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) 860 { 861 struct zfcp_wka_ports *wka_ports; 862 863 wka_ports = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL); 864 if (!wka_ports) 865 return -ENOMEM; 866 867 adapter->gs = wka_ports; 868 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); 869 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); 870 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); 871 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); 872 zfcp_fc_wka_port_init(&wka_ports->ks, FC_FID_SEC_KEY, adapter); 873 874 return 0; 875 } 876 877 void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) 878 { 879 kfree(adapter->gs); 880 adapter->gs = NULL; 881 } 882 883