zfcp_fc.c revision de3dc57214a1466034ecc4d4ffb10331d34c09a3
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 14enum 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 21static 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 28struct 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 43struct 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 48struct 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 54struct zfcp_fc_ns_handler_data { 55 struct completion done; 56 void (*handler)(unsigned long); 57 unsigned long handler_data; 58}; 59 60static 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 85static 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 } 101out: 102 mutex_unlock(&wka_port->mutex); 103} 104 105static 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 113static 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 127static 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 135void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs) 136{ 137 if (!gs) 138 return; 139 zfcp_fc_wka_port_force_offline(&gs->ms); 140 zfcp_fc_wka_port_force_offline(&gs->ts); 141 zfcp_fc_wka_port_force_offline(&gs->ds); 142 zfcp_fc_wka_port_force_offline(&gs->as); 143 zfcp_fc_wka_port_force_offline(&gs->ks); 144} 145 146static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, 147 struct fcp_rscn_element *elem) 148{ 149 unsigned long flags; 150 struct zfcp_adapter *adapter = fsf_req->adapter; 151 struct zfcp_port *port; 152 153 read_lock_irqsave(&adapter->port_list_lock, flags); 154 list_for_each_entry(port, &adapter->port_list, list) { 155 if ((port->d_id & range) == (elem->nport_did & range)) 156 zfcp_fc_test_link(port); 157 if (!port->d_id) 158 zfcp_erp_port_reopen(port, 159 ZFCP_STATUS_COMMON_ERP_FAILED, 160 "fcrscn1", NULL); 161 } 162 read_unlock_irqrestore(&adapter->port_list_lock, flags); 163} 164 165static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) 166{ 167 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; 168 struct fcp_rscn_head *fcp_rscn_head; 169 struct fcp_rscn_element *fcp_rscn_element; 170 u16 i; 171 u16 no_entries; 172 u32 range_mask; 173 174 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; 175 fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; 176 177 /* see FC-FS */ 178 no_entries = fcp_rscn_head->payload_len / 179 sizeof(struct fcp_rscn_element); 180 181 for (i = 1; i < no_entries; i++) { 182 /* skip head and start with 1st element */ 183 fcp_rscn_element++; 184 range_mask = rscn_range_mask[fcp_rscn_element->addr_format]; 185 _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); 186 } 187 schedule_work(&fsf_req->adapter->scan_work); 188} 189 190static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) 191{ 192 unsigned long flags; 193 struct zfcp_adapter *adapter = req->adapter; 194 struct zfcp_port *port; 195 196 read_lock_irqsave(&adapter->port_list_lock, flags); 197 list_for_each_entry(port, &adapter->port_list, list) 198 if (port->wwpn == wwpn) { 199 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); 200 break; 201 } 202 read_unlock_irqrestore(&adapter->port_list_lock, flags); 203} 204 205static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) 206{ 207 struct fsf_status_read_buffer *status_buffer = 208 (struct fsf_status_read_buffer *)req->data; 209 struct fsf_plogi *els_plogi = 210 (struct fsf_plogi *) status_buffer->payload.data; 211 212 zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); 213} 214 215static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) 216{ 217 struct fsf_status_read_buffer *status_buffer = 218 (struct fsf_status_read_buffer *)req->data; 219 struct fcp_logo *els_logo = 220 (struct fcp_logo *) status_buffer->payload.data; 221 222 zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); 223} 224 225/** 226 * zfcp_fc_incoming_els - handle incoming ELS 227 * @fsf_req - request which contains incoming ELS 228 */ 229void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) 230{ 231 struct fsf_status_read_buffer *status_buffer = 232 (struct fsf_status_read_buffer *) fsf_req->data; 233 unsigned int els_type = status_buffer->payload.data[0]; 234 235 zfcp_dbf_san_incoming_els(fsf_req); 236 if (els_type == LS_PLOGI) 237 zfcp_fc_incoming_plogi(fsf_req); 238 else if (els_type == LS_LOGO) 239 zfcp_fc_incoming_logo(fsf_req); 240 else if (els_type == LS_RSCN) 241 zfcp_fc_incoming_rscn(fsf_req); 242} 243 244static void zfcp_fc_ns_handler(unsigned long data) 245{ 246 struct zfcp_fc_ns_handler_data *compl_rec = 247 (struct zfcp_fc_ns_handler_data *) data; 248 249 if (compl_rec->handler) 250 compl_rec->handler(compl_rec->handler_data); 251 252 complete(&compl_rec->done); 253} 254 255static void zfcp_fc_ns_gid_pn_eval(unsigned long data) 256{ 257 struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; 258 struct zfcp_send_ct *ct = &gid_pn->ct; 259 struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); 260 struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); 261 struct zfcp_port *port = gid_pn->port; 262 263 if (ct->status) 264 return; 265 if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) 266 return; 267 268 /* paranoia */ 269 if (ct_iu_req->wwpn != port->wwpn) 270 return; 271 /* looks like a valid d_id */ 272 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; 273} 274 275static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, 276 struct zfcp_gid_pn_data *gid_pn) 277{ 278 struct zfcp_adapter *adapter = port->adapter; 279 struct zfcp_fc_ns_handler_data compl_rec; 280 int ret; 281 282 /* setup parameters for send generic command */ 283 gid_pn->port = port; 284 gid_pn->ct.wka_port = &adapter->gs->ds; 285 gid_pn->ct.handler = zfcp_fc_ns_handler; 286 gid_pn->ct.handler_data = (unsigned long) &compl_rec; 287 gid_pn->ct.req = &gid_pn->req; 288 gid_pn->ct.resp = &gid_pn->resp; 289 sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, 290 sizeof(struct ct_iu_gid_pn_req)); 291 sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, 292 sizeof(struct ct_iu_gid_pn_resp)); 293 294 /* setup nameserver request */ 295 gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; 296 gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 297 gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; 298 gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; 299 gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; 300 gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4; 301 gid_pn->ct_iu_req.wwpn = port->wwpn; 302 303 init_completion(&compl_rec.done); 304 compl_rec.handler = zfcp_fc_ns_gid_pn_eval; 305 compl_rec.handler_data = (unsigned long) gid_pn; 306 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req); 307 if (!ret) 308 wait_for_completion(&compl_rec.done); 309 return ret; 310} 311 312/** 313 * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request 314 * @port: port where GID_PN request is needed 315 * return: -ENOMEM on error, 0 otherwise 316 */ 317static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) 318{ 319 int ret; 320 struct zfcp_gid_pn_data *gid_pn; 321 struct zfcp_adapter *adapter = port->adapter; 322 323 gid_pn = mempool_alloc(adapter->pool.gid_pn_data, GFP_ATOMIC); 324 if (!gid_pn) 325 return -ENOMEM; 326 327 memset(gid_pn, 0, sizeof(*gid_pn)); 328 329 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 330 if (ret) 331 goto out; 332 333 ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); 334 335 zfcp_fc_wka_port_put(&adapter->gs->ds); 336out: 337 mempool_free(gid_pn, adapter->pool.gid_pn_data); 338 return ret; 339} 340 341void zfcp_fc_port_did_lookup(struct work_struct *work) 342{ 343 int ret; 344 struct zfcp_port *port = container_of(work, struct zfcp_port, 345 gid_pn_work); 346 347 ret = zfcp_fc_ns_gid_pn(port); 348 if (ret) { 349 /* could not issue gid_pn for some reason */ 350 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); 351 goto out; 352 } 353 354 if (!port->d_id) { 355 zfcp_erp_port_failed(port, "fcgpn_2", NULL); 356 goto out; 357 } 358 359 zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); 360out: 361 put_device(&port->sysfs_device); 362} 363 364/** 365 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request 366 * @port: The zfcp_port to lookup the d_id for. 367 */ 368void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) 369{ 370 get_device(&port->sysfs_device); 371 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) 372 put_device(&port->sysfs_device); 373} 374 375/** 376 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload 377 * @port: zfcp_port structure 378 * @plogi: plogi payload 379 * 380 * Evaluate PLOGI playload and copy important fields into zfcp_port structure 381 */ 382void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) 383{ 384 port->maxframe_size = plogi->serv_param.common_serv_param[7] | 385 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); 386 if (plogi->serv_param.class1_serv_param[0] & 0x80) 387 port->supported_classes |= FC_COS_CLASS1; 388 if (plogi->serv_param.class2_serv_param[0] & 0x80) 389 port->supported_classes |= FC_COS_CLASS2; 390 if (plogi->serv_param.class3_serv_param[0] & 0x80) 391 port->supported_classes |= FC_COS_CLASS3; 392 if (plogi->serv_param.class4_serv_param[0] & 0x80) 393 port->supported_classes |= FC_COS_CLASS4; 394} 395 396struct zfcp_els_adisc { 397 struct zfcp_send_els els; 398 struct scatterlist req; 399 struct scatterlist resp; 400 struct zfcp_ls_adisc ls_adisc; 401 struct zfcp_ls_adisc ls_adisc_acc; 402}; 403 404static void zfcp_fc_adisc_handler(unsigned long data) 405{ 406 struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; 407 struct zfcp_port *port = adisc->els.port; 408 struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc; 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 = ls_adisc->wwnn; 419 420 if ((port->wwpn != ls_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_els_adisc *adisc; 438 struct zfcp_adapter *adapter = port->adapter; 439 440 adisc = kzalloc(sizeof(struct zfcp_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->ls_adisc, 447 sizeof(struct zfcp_ls_adisc)); 448 sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, 449 sizeof(struct zfcp_ls_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->ls_adisc.code = ZFCP_LS_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->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); 461 adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); 462 adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); 463 464 return zfcp_fsf_send_els(&adisc->els); 465} 466 467void zfcp_fc_link_test_work(struct work_struct *work) 468{ 469 struct zfcp_port *port = 470 container_of(work, struct zfcp_port, test_link_work); 471 int retval; 472 473 get_device(&port->sysfs_device); 474 port->rport_task = RPORT_DEL; 475 zfcp_scsi_rport_work(&port->rport_work); 476 477 /* only issue one test command at one time per port */ 478 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) 479 goto out; 480 481 atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 482 483 retval = zfcp_fc_adisc(port); 484 if (retval == 0) 485 return; 486 487 /* send of ADISC was not possible */ 488 atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); 489 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); 490 491out: 492 put_device(&port->sysfs_device); 493} 494 495/** 496 * zfcp_fc_test_link - lightweight link test procedure 497 * @port: port to be tested 498 * 499 * Test status of a link to a remote port using the ELS command ADISC. 500 * If there is a problem with the remote port, error recovery steps 501 * will be triggered. 502 */ 503void zfcp_fc_test_link(struct zfcp_port *port) 504{ 505 get_device(&port->sysfs_device); 506 if (!queue_work(port->adapter->work_queue, &port->test_link_work)) 507 put_device(&port->sysfs_device); 508} 509 510static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft, int buf_num) 511{ 512 struct scatterlist *sg = &gpn_ft->sg_req; 513 514 kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); 515 zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); 516 517 kfree(gpn_ft); 518} 519 520static struct zfcp_gpn_ft *zfcp_alloc_sg_env(int buf_num) 521{ 522 struct zfcp_gpn_ft *gpn_ft; 523 struct ct_iu_gpn_ft_req *req; 524 525 gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); 526 if (!gpn_ft) 527 return NULL; 528 529 req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); 530 if (!req) { 531 kfree(gpn_ft); 532 gpn_ft = NULL; 533 goto out; 534 } 535 sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); 536 537 if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { 538 zfcp_free_sg_env(gpn_ft, buf_num); 539 gpn_ft = NULL; 540 } 541out: 542 return gpn_ft; 543} 544 545 546static int zfcp_fc_send_gpn_ft(struct zfcp_gpn_ft *gpn_ft, 547 struct zfcp_adapter *adapter, int max_bytes) 548{ 549 struct zfcp_send_ct *ct = &gpn_ft->ct; 550 struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); 551 struct zfcp_fc_ns_handler_data compl_rec; 552 int ret; 553 554 /* prepare CT IU for GPN_FT */ 555 req->header.revision = ZFCP_CT_REVISION; 556 req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; 557 req->header.gs_subtype = ZFCP_CT_NAME_SERVER; 558 req->header.options = ZFCP_CT_SYNCHRONOUS; 559 req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; 560 req->header.max_res_size = max_bytes / 4; 561 req->flags = 0; 562 req->domain_id_scope = 0; 563 req->area_id_scope = 0; 564 req->fc4_type = ZFCP_CT_SCSI_FCP; 565 566 /* prepare zfcp_send_ct */ 567 ct->wka_port = &adapter->gs->ds; 568 ct->handler = zfcp_fc_ns_handler; 569 ct->handler_data = (unsigned long)&compl_rec; 570 ct->req = &gpn_ft->sg_req; 571 ct->resp = gpn_ft->sg_resp; 572 573 init_completion(&compl_rec.done); 574 compl_rec.handler = NULL; 575 ret = zfcp_fsf_send_ct(ct, NULL); 576 if (!ret) 577 wait_for_completion(&compl_rec.done); 578 return ret; 579} 580 581static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) 582{ 583 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) 584 return; 585 586 atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); 587 588 if ((port->supported_classes != 0) || 589 !list_empty(&port->unit_list)) 590 return; 591 592 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); 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 * @adapter: pointer to struct zfcp_adapter 669 */ 670int zfcp_fc_scan_ports(struct zfcp_adapter *adapter) 671{ 672 int ret, i; 673 struct zfcp_gpn_ft *gpn_ft; 674 int chain, max_entries, buf_num, max_bytes; 675 676 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; 677 buf_num = chain ? ZFCP_GPN_FT_BUFFERS : 1; 678 max_entries = chain ? ZFCP_GPN_FT_MAX_ENTRIES : ZFCP_GPN_FT_ENTRIES; 679 max_bytes = chain ? ZFCP_GPN_FT_MAX_SIZE : ZFCP_CT_SIZE_ONE_PAGE; 680 681 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && 682 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) 683 return 0; 684 685 ret = zfcp_fc_wka_port_get(&adapter->gs->ds); 686 if (ret) 687 return ret; 688 689 gpn_ft = zfcp_alloc_sg_env(buf_num); 690 if (!gpn_ft) { 691 ret = -ENOMEM; 692 goto out; 693 } 694 695 for (i = 0; i < 3; i++) { 696 ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); 697 if (!ret) { 698 ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries); 699 if (ret == -EAGAIN) 700 ssleep(1); 701 else 702 break; 703 } 704 } 705 zfcp_free_sg_env(gpn_ft, buf_num); 706out: 707 zfcp_fc_wka_port_put(&adapter->gs->ds); 708 return ret; 709} 710 711 712void _zfcp_fc_scan_ports_later(struct work_struct *work) 713{ 714 zfcp_fc_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); 715} 716 717struct zfcp_els_fc_job { 718 struct zfcp_send_els els; 719 struct fc_bsg_job *job; 720}; 721 722static void zfcp_fc_generic_els_handler(unsigned long data) 723{ 724 struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data; 725 struct fc_bsg_job *job = els_fc_job->job; 726 struct fc_bsg_reply *reply = job->reply; 727 728 if (els_fc_job->els.status) { 729 /* request rejected or timed out */ 730 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT; 731 goto out; 732 } 733 734 reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; 735 reply->reply_payload_rcv_len = job->reply_payload.payload_len; 736 737out: 738 job->state_flags = FC_RQST_STATE_DONE; 739 job->job_done(job); 740 kfree(els_fc_job); 741} 742 743int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job) 744{ 745 struct zfcp_els_fc_job *els_fc_job; 746 struct fc_rport *rport = job->rport; 747 struct Scsi_Host *shost; 748 struct zfcp_adapter *adapter; 749 struct zfcp_port *port; 750 u8 *port_did; 751 752 shost = rport ? rport_to_shost(rport) : job->shost; 753 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 754 755 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 756 return -EINVAL; 757 758 els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL); 759 if (!els_fc_job) 760 return -ENOMEM; 761 762 els_fc_job->els.adapter = adapter; 763 if (rport) { 764 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 765 if (!port) { 766 kfree(els_fc_job); 767 return -EINVAL; 768 } 769 770 els_fc_job->els.d_id = port->d_id; 771 put_device(&port->sysfs_device); 772 } else { 773 port_did = job->request->rqst_data.h_els.port_id; 774 els_fc_job->els.d_id = (port_did[0] << 16) + 775 (port_did[1] << 8) + port_did[2]; 776 } 777 778 els_fc_job->els.req = job->request_payload.sg_list; 779 els_fc_job->els.resp = job->reply_payload.sg_list; 780 els_fc_job->els.handler = zfcp_fc_generic_els_handler; 781 els_fc_job->els.handler_data = (unsigned long) els_fc_job; 782 els_fc_job->job = job; 783 784 return zfcp_fsf_send_els(&els_fc_job->els); 785} 786 787struct zfcp_ct_fc_job { 788 struct zfcp_send_ct ct; 789 struct fc_bsg_job *job; 790}; 791 792static void zfcp_fc_generic_ct_handler(unsigned long data) 793{ 794 struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data; 795 struct fc_bsg_job *job = ct_fc_job->job; 796 797 job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ? 798 FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK; 799 job->reply->reply_payload_rcv_len = job->reply_payload.payload_len; 800 job->state_flags = FC_RQST_STATE_DONE; 801 job->job_done(job); 802 803 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 804 805 kfree(ct_fc_job); 806} 807 808int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job) 809{ 810 int ret; 811 u8 gs_type; 812 struct fc_rport *rport = job->rport; 813 struct Scsi_Host *shost; 814 struct zfcp_adapter *adapter; 815 struct zfcp_ct_fc_job *ct_fc_job; 816 u32 preamble_word1; 817 818 shost = rport ? rport_to_shost(rport) : job->shost; 819 820 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 821 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) 822 return -EINVAL; 823 824 ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL); 825 if (!ct_fc_job) 826 return -ENOMEM; 827 828 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; 829 gs_type = (preamble_word1 & 0xff000000) >> 24; 830 831 switch (gs_type) { 832 case FC_FST_ALIAS: 833 ct_fc_job->ct.wka_port = &adapter->gs->as; 834 break; 835 case FC_FST_MGMT: 836 ct_fc_job->ct.wka_port = &adapter->gs->ms; 837 break; 838 case FC_FST_TIME: 839 ct_fc_job->ct.wka_port = &adapter->gs->ts; 840 break; 841 case FC_FST_DIR: 842 ct_fc_job->ct.wka_port = &adapter->gs->ds; 843 break; 844 default: 845 kfree(ct_fc_job); 846 return -EINVAL; /* no such service */ 847 } 848 849 ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port); 850 if (ret) { 851 kfree(ct_fc_job); 852 return ret; 853 } 854 855 ct_fc_job->ct.req = job->request_payload.sg_list; 856 ct_fc_job->ct.resp = job->reply_payload.sg_list; 857 ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler; 858 ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job; 859 ct_fc_job->ct.completion = NULL; 860 ct_fc_job->job = job; 861 862 ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL); 863 if (ret) { 864 kfree(ct_fc_job); 865 zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); 866 } 867 return ret; 868} 869 870int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) 871{ 872 struct zfcp_wka_ports *wka_ports; 873 874 wka_ports = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL); 875 if (!wka_ports) 876 return -ENOMEM; 877 878 adapter->gs = wka_ports; 879 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); 880 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); 881 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); 882 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); 883 zfcp_fc_wka_port_init(&wka_ports->ks, FC_FID_SEC_KEY, adapter); 884 885 return 0; 886} 887 888void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) 889{ 890 kfree(adapter->gs); 891 adapter->gs = NULL; 892} 893 894