1 /* 2 * zfcp device driver 3 * 4 * Debug traces for zfcp. 5 * 6 * Copyright IBM Corp. 2002, 2016 7 */ 8 9 #define KMSG_COMPONENT "zfcp" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/module.h> 13 #include <linux/ctype.h> 14 #include <linux/slab.h> 15 #include <asm/debug.h> 16 #include "zfcp_dbf.h" 17 #include "zfcp_ext.h" 18 #include "zfcp_fc.h" 19 20 static u32 dbfsize = 4; 21 22 module_param(dbfsize, uint, 0400); 23 MODULE_PARM_DESC(dbfsize, 24 "number of pages for each debug feature area (default 4)"); 25 26 static u32 dbflevel = 3; 27 28 module_param(dbflevel, uint, 0400); 29 MODULE_PARM_DESC(dbflevel, 30 "log level for each debug feature area " 31 "(default 3, range 0..6)"); 32 33 static inline unsigned int zfcp_dbf_plen(unsigned int offset) 34 { 35 return sizeof(struct zfcp_dbf_pay) + offset - ZFCP_DBF_PAY_MAX_REC; 36 } 37 38 static inline 39 void zfcp_dbf_pl_write(struct zfcp_dbf *dbf, void *data, u16 length, char *area, 40 u64 req_id) 41 { 42 struct zfcp_dbf_pay *pl = &dbf->pay_buf; 43 u16 offset = 0, rec_length; 44 45 spin_lock(&dbf->pay_lock); 46 memset(pl, 0, sizeof(*pl)); 47 pl->fsf_req_id = req_id; 48 memcpy(pl->area, area, ZFCP_DBF_TAG_LEN); 49 50 while (offset < length) { 51 rec_length = min((u16) ZFCP_DBF_PAY_MAX_REC, 52 (u16) (length - offset)); 53 memcpy(pl->data, data + offset, rec_length); 54 debug_event(dbf->pay, 1, pl, zfcp_dbf_plen(rec_length)); 55 56 offset += rec_length; 57 pl->counter++; 58 } 59 60 spin_unlock(&dbf->pay_lock); 61 } 62 63 /** 64 * zfcp_dbf_hba_fsf_res - trace event for fsf responses 65 * @tag: tag indicating which kind of unsolicited status has been received 66 * @req: request for which a response was received 67 */ 68 void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req) 69 { 70 struct zfcp_dbf *dbf = req->adapter->dbf; 71 struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix; 72 struct fsf_qtcb_header *q_head = &req->qtcb->header; 73 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 74 unsigned long flags; 75 76 spin_lock_irqsave(&dbf->hba_lock, flags); 77 memset(rec, 0, sizeof(*rec)); 78 79 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 80 rec->id = ZFCP_DBF_HBA_RES; 81 rec->fsf_req_id = req->req_id; 82 rec->fsf_req_status = req->status; 83 rec->fsf_cmd = req->fsf_command; 84 rec->fsf_seq_no = req->seq_no; 85 rec->u.res.req_issued = req->issued; 86 rec->u.res.prot_status = q_pref->prot_status; 87 rec->u.res.fsf_status = q_head->fsf_status; 88 rec->u.res.port_handle = q_head->port_handle; 89 rec->u.res.lun_handle = q_head->lun_handle; 90 91 memcpy(rec->u.res.prot_status_qual, &q_pref->prot_status_qual, 92 FSF_PROT_STATUS_QUAL_SIZE); 93 memcpy(rec->u.res.fsf_status_qual, &q_head->fsf_status_qual, 94 FSF_STATUS_QUALIFIER_SIZE); 95 96 if (req->fsf_command != FSF_QTCB_FCP_CMND) { 97 rec->pl_len = q_head->log_length; 98 zfcp_dbf_pl_write(dbf, (char *)q_pref + q_head->log_start, 99 rec->pl_len, "fsf_res", req->req_id); 100 } 101 102 debug_event(dbf->hba, level, rec, sizeof(*rec)); 103 spin_unlock_irqrestore(&dbf->hba_lock, flags); 104 } 105 106 /** 107 * zfcp_dbf_hba_fsf_uss - trace event for an unsolicited status buffer 108 * @tag: tag indicating which kind of unsolicited status has been received 109 * @req: request providing the unsolicited status 110 */ 111 void zfcp_dbf_hba_fsf_uss(char *tag, struct zfcp_fsf_req *req) 112 { 113 struct zfcp_dbf *dbf = req->adapter->dbf; 114 struct fsf_status_read_buffer *srb = req->data; 115 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 116 unsigned long flags; 117 118 spin_lock_irqsave(&dbf->hba_lock, flags); 119 memset(rec, 0, sizeof(*rec)); 120 121 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 122 rec->id = ZFCP_DBF_HBA_USS; 123 rec->fsf_req_id = req->req_id; 124 rec->fsf_req_status = req->status; 125 rec->fsf_cmd = req->fsf_command; 126 127 if (!srb) 128 goto log; 129 130 rec->u.uss.status_type = srb->status_type; 131 rec->u.uss.status_subtype = srb->status_subtype; 132 rec->u.uss.d_id = ntoh24(srb->d_id); 133 rec->u.uss.lun = srb->fcp_lun; 134 memcpy(&rec->u.uss.queue_designator, &srb->queue_designator, 135 sizeof(rec->u.uss.queue_designator)); 136 137 /* status read buffer payload length */ 138 rec->pl_len = (!srb->length) ? 0 : srb->length - 139 offsetof(struct fsf_status_read_buffer, payload); 140 141 if (rec->pl_len) 142 zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len, 143 "fsf_uss", req->req_id); 144 log: 145 debug_event(dbf->hba, 2, rec, sizeof(*rec)); 146 spin_unlock_irqrestore(&dbf->hba_lock, flags); 147 } 148 149 /** 150 * zfcp_dbf_hba_bit_err - trace event for bit error conditions 151 * @tag: tag indicating which kind of unsolicited status has been received 152 * @req: request which caused the bit_error condition 153 */ 154 void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req) 155 { 156 struct zfcp_dbf *dbf = req->adapter->dbf; 157 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 158 struct fsf_status_read_buffer *sr_buf = req->data; 159 unsigned long flags; 160 161 spin_lock_irqsave(&dbf->hba_lock, flags); 162 memset(rec, 0, sizeof(*rec)); 163 164 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 165 rec->id = ZFCP_DBF_HBA_BIT; 166 rec->fsf_req_id = req->req_id; 167 rec->fsf_req_status = req->status; 168 rec->fsf_cmd = req->fsf_command; 169 memcpy(&rec->u.be, &sr_buf->payload.bit_error, 170 sizeof(struct fsf_bit_error_payload)); 171 172 debug_event(dbf->hba, 1, rec, sizeof(*rec)); 173 spin_unlock_irqrestore(&dbf->hba_lock, flags); 174 } 175 176 /** 177 * zfcp_dbf_hba_def_err - trace event for deferred error messages 178 * @adapter: pointer to struct zfcp_adapter 179 * @req_id: request id which caused the deferred error message 180 * @scount: number of sbals incl. the signaling sbal 181 * @pl: array of all involved sbals 182 */ 183 void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount, 184 void **pl) 185 { 186 struct zfcp_dbf *dbf = adapter->dbf; 187 struct zfcp_dbf_pay *payload = &dbf->pay_buf; 188 unsigned long flags; 189 u16 length; 190 191 if (!pl) 192 return; 193 194 spin_lock_irqsave(&dbf->pay_lock, flags); 195 memset(payload, 0, sizeof(*payload)); 196 197 memcpy(payload->area, "def_err", 7); 198 payload->fsf_req_id = req_id; 199 payload->counter = 0; 200 length = min((u16)sizeof(struct qdio_buffer), 201 (u16)ZFCP_DBF_PAY_MAX_REC); 202 203 while (payload->counter < scount && (char *)pl[payload->counter]) { 204 memcpy(payload->data, (char *)pl[payload->counter], length); 205 debug_event(dbf->pay, 1, payload, zfcp_dbf_plen(length)); 206 payload->counter++; 207 } 208 209 spin_unlock_irqrestore(&dbf->pay_lock, flags); 210 } 211 212 /** 213 * zfcp_dbf_hba_basic - trace event for basic adapter events 214 * @adapter: pointer to struct zfcp_adapter 215 */ 216 void zfcp_dbf_hba_basic(char *tag, struct zfcp_adapter *adapter) 217 { 218 struct zfcp_dbf *dbf = adapter->dbf; 219 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 220 unsigned long flags; 221 222 spin_lock_irqsave(&dbf->hba_lock, flags); 223 memset(rec, 0, sizeof(*rec)); 224 225 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 226 rec->id = ZFCP_DBF_HBA_BASIC; 227 228 debug_event(dbf->hba, 1, rec, sizeof(*rec)); 229 spin_unlock_irqrestore(&dbf->hba_lock, flags); 230 } 231 232 static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec, 233 struct zfcp_adapter *adapter, 234 struct zfcp_port *port, 235 struct scsi_device *sdev) 236 { 237 rec->adapter_status = atomic_read(&adapter->status); 238 if (port) { 239 rec->port_status = atomic_read(&port->status); 240 rec->wwpn = port->wwpn; 241 rec->d_id = port->d_id; 242 } 243 if (sdev) { 244 rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status); 245 rec->lun = zfcp_scsi_dev_lun(sdev); 246 } else 247 rec->lun = ZFCP_DBF_INVALID_LUN; 248 } 249 250 /** 251 * zfcp_dbf_rec_trig - trace event related to triggered recovery 252 * @tag: identifier for event 253 * @adapter: adapter on which the erp_action should run 254 * @port: remote port involved in the erp_action 255 * @sdev: scsi device involved in the erp_action 256 * @want: wanted erp_action 257 * @need: required erp_action 258 * 259 * The adapter->erp_lock has to be held. 260 */ 261 void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter, 262 struct zfcp_port *port, struct scsi_device *sdev, 263 u8 want, u8 need) 264 { 265 struct zfcp_dbf *dbf = adapter->dbf; 266 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 267 struct list_head *entry; 268 unsigned long flags; 269 270 spin_lock_irqsave(&dbf->rec_lock, flags); 271 memset(rec, 0, sizeof(*rec)); 272 273 rec->id = ZFCP_DBF_REC_TRIG; 274 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 275 zfcp_dbf_set_common(rec, adapter, port, sdev); 276 277 list_for_each(entry, &adapter->erp_ready_head) 278 rec->u.trig.ready++; 279 280 list_for_each(entry, &adapter->erp_running_head) 281 rec->u.trig.running++; 282 283 rec->u.trig.want = want; 284 rec->u.trig.need = need; 285 286 debug_event(dbf->rec, 1, rec, sizeof(*rec)); 287 spin_unlock_irqrestore(&dbf->rec_lock, flags); 288 } 289 290 291 /** 292 * zfcp_dbf_rec_run - trace event related to running recovery 293 * @tag: identifier for event 294 * @erp: erp_action running 295 */ 296 void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp) 297 { 298 struct zfcp_dbf *dbf = erp->adapter->dbf; 299 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 300 unsigned long flags; 301 302 spin_lock_irqsave(&dbf->rec_lock, flags); 303 memset(rec, 0, sizeof(*rec)); 304 305 rec->id = ZFCP_DBF_REC_RUN; 306 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 307 zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev); 308 309 rec->u.run.fsf_req_id = erp->fsf_req_id; 310 rec->u.run.rec_status = erp->status; 311 rec->u.run.rec_step = erp->step; 312 rec->u.run.rec_action = erp->action; 313 314 if (erp->sdev) 315 rec->u.run.rec_count = 316 atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter); 317 else if (erp->port) 318 rec->u.run.rec_count = atomic_read(&erp->port->erp_counter); 319 else 320 rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter); 321 322 debug_event(dbf->rec, 1, rec, sizeof(*rec)); 323 spin_unlock_irqrestore(&dbf->rec_lock, flags); 324 } 325 326 /** 327 * zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery 328 * @tag: identifier for event 329 * @wka_port: well known address port 330 * @req_id: request ID to correlate with potential HBA trace record 331 */ 332 void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port, 333 u64 req_id) 334 { 335 struct zfcp_dbf *dbf = wka_port->adapter->dbf; 336 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 337 unsigned long flags; 338 339 spin_lock_irqsave(&dbf->rec_lock, flags); 340 memset(rec, 0, sizeof(*rec)); 341 342 rec->id = ZFCP_DBF_REC_RUN; 343 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 344 rec->port_status = wka_port->status; 345 rec->d_id = wka_port->d_id; 346 rec->lun = ZFCP_DBF_INVALID_LUN; 347 348 rec->u.run.fsf_req_id = req_id; 349 rec->u.run.rec_status = ~0; 350 rec->u.run.rec_step = ~0; 351 rec->u.run.rec_action = ~0; 352 rec->u.run.rec_count = ~0; 353 354 debug_event(dbf->rec, 1, rec, sizeof(*rec)); 355 spin_unlock_irqrestore(&dbf->rec_lock, flags); 356 } 357 358 static inline 359 void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf, 360 char *paytag, struct scatterlist *sg, u8 id, u16 len, 361 u64 req_id, u32 d_id, u16 cap_len) 362 { 363 struct zfcp_dbf_san *rec = &dbf->san_buf; 364 u16 rec_len; 365 unsigned long flags; 366 struct zfcp_dbf_pay *payload = &dbf->pay_buf; 367 u16 pay_sum = 0; 368 369 spin_lock_irqsave(&dbf->san_lock, flags); 370 memset(rec, 0, sizeof(*rec)); 371 372 rec->id = id; 373 rec->fsf_req_id = req_id; 374 rec->d_id = d_id; 375 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 376 rec->pl_len = len; /* full length even if we cap pay below */ 377 if (!sg) 378 goto out; 379 rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD); 380 memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */ 381 if (len <= rec_len) 382 goto out; /* skip pay record if full content in rec->payload */ 383 384 /* if (len > rec_len): 385 * dump data up to cap_len ignoring small duplicate in rec->payload 386 */ 387 spin_lock(&dbf->pay_lock); 388 memset(payload, 0, sizeof(*payload)); 389 memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN); 390 payload->fsf_req_id = req_id; 391 payload->counter = 0; 392 for (; sg && pay_sum < cap_len; sg = sg_next(sg)) { 393 u16 pay_len, offset = 0; 394 395 while (offset < sg->length && pay_sum < cap_len) { 396 pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC, 397 (u16)(sg->length - offset)); 398 /* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */ 399 memcpy(payload->data, sg_virt(sg) + offset, pay_len); 400 debug_event(dbf->pay, 1, payload, 401 zfcp_dbf_plen(pay_len)); 402 payload->counter++; 403 offset += pay_len; 404 pay_sum += pay_len; 405 } 406 } 407 spin_unlock(&dbf->pay_lock); 408 409 out: 410 debug_event(dbf->san, 1, rec, sizeof(*rec)); 411 spin_unlock_irqrestore(&dbf->san_lock, flags); 412 } 413 414 /** 415 * zfcp_dbf_san_req - trace event for issued SAN request 416 * @tag: identifier for event 417 * @fsf_req: request containing issued CT data 418 * d_id: destination ID 419 */ 420 void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id) 421 { 422 struct zfcp_dbf *dbf = fsf->adapter->dbf; 423 struct zfcp_fsf_ct_els *ct_els = fsf->data; 424 u16 length; 425 426 length = (u16)zfcp_qdio_real_bytes(ct_els->req); 427 zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ, 428 length, fsf->req_id, d_id, length); 429 } 430 431 static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag, 432 struct zfcp_fsf_req *fsf, 433 u16 len) 434 { 435 struct zfcp_fsf_ct_els *ct_els = fsf->data; 436 struct fc_ct_hdr *reqh = sg_virt(ct_els->req); 437 struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1); 438 struct scatterlist *resp_entry = ct_els->resp; 439 struct fc_gpn_ft_resp *acc; 440 int max_entries, x, last = 0; 441 442 if (!(memcmp(tag, "fsscth2", 7) == 0 443 && ct_els->d_id == FC_FID_DIR_SERV 444 && reqh->ct_rev == FC_CT_REV 445 && reqh->ct_in_id[0] == 0 446 && reqh->ct_in_id[1] == 0 447 && reqh->ct_in_id[2] == 0 448 && reqh->ct_fs_type == FC_FST_DIR 449 && reqh->ct_fs_subtype == FC_NS_SUBTYPE 450 && reqh->ct_options == 0 451 && reqh->_ct_resvd1 == 0 452 && reqh->ct_cmd == FC_NS_GPN_FT 453 /* reqh->ct_mr_size can vary so do not match but read below */ 454 && reqh->_ct_resvd2 == 0 455 && reqh->ct_reason == 0 456 && reqh->ct_explan == 0 457 && reqh->ct_vendor == 0 458 && reqn->fn_resvd == 0 459 && reqn->fn_domain_id_scope == 0 460 && reqn->fn_area_id_scope == 0 461 && reqn->fn_fc4_type == FC_TYPE_FCP)) 462 return len; /* not GPN_FT response so do not cap */ 463 464 acc = sg_virt(resp_entry); 465 max_entries = (reqh->ct_mr_size * 4 / sizeof(struct fc_gpn_ft_resp)) 466 + 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one 467 * to account for header as 1st pseudo "entry" */; 468 469 /* the basic CT_IU preamble is the same size as one entry in the GPN_FT 470 * response, allowing us to skip special handling for it - just skip it 471 */ 472 for (x = 1; x < max_entries && !last; x++) { 473 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) 474 acc++; 475 else 476 acc = sg_virt(++resp_entry); 477 478 last = acc->fp_flags & FC_NS_FID_LAST; 479 } 480 len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp))); 481 return len; /* cap after last entry */ 482 } 483 484 /** 485 * zfcp_dbf_san_res - trace event for received SAN request 486 * @tag: identifier for event 487 * @fsf_req: request containing issued CT data 488 */ 489 void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf) 490 { 491 struct zfcp_dbf *dbf = fsf->adapter->dbf; 492 struct zfcp_fsf_ct_els *ct_els = fsf->data; 493 u16 length; 494 495 length = (u16)zfcp_qdio_real_bytes(ct_els->resp); 496 zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES, 497 length, fsf->req_id, ct_els->d_id, 498 zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length)); 499 } 500 501 /** 502 * zfcp_dbf_san_in_els - trace event for incoming ELS 503 * @tag: identifier for event 504 * @fsf_req: request containing issued CT data 505 */ 506 void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf) 507 { 508 struct zfcp_dbf *dbf = fsf->adapter->dbf; 509 struct fsf_status_read_buffer *srb = 510 (struct fsf_status_read_buffer *) fsf->data; 511 u16 length; 512 struct scatterlist sg; 513 514 length = (u16)(srb->length - 515 offsetof(struct fsf_status_read_buffer, payload)); 516 sg_init_one(&sg, srb->payload.data, length); 517 zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length, 518 fsf->req_id, ntoh24(srb->d_id), length); 519 } 520 521 /** 522 * zfcp_dbf_scsi - trace event for scsi commands 523 * @tag: identifier for event 524 * @sc: pointer to struct scsi_cmnd 525 * @fsf: pointer to struct zfcp_fsf_req 526 */ 527 void zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *sc, 528 struct zfcp_fsf_req *fsf) 529 { 530 struct zfcp_adapter *adapter = 531 (struct zfcp_adapter *) sc->device->host->hostdata[0]; 532 struct zfcp_dbf *dbf = adapter->dbf; 533 struct zfcp_dbf_scsi *rec = &dbf->scsi_buf; 534 struct fcp_resp_with_ext *fcp_rsp; 535 struct fcp_resp_rsp_info *fcp_rsp_info; 536 unsigned long flags; 537 538 spin_lock_irqsave(&dbf->scsi_lock, flags); 539 memset(rec, 0, sizeof(*rec)); 540 541 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 542 rec->id = ZFCP_DBF_SCSI_CMND; 543 rec->scsi_result = sc->result; 544 rec->scsi_retries = sc->retries; 545 rec->scsi_allowed = sc->allowed; 546 rec->scsi_id = sc->device->id; 547 /* struct zfcp_dbf_scsi needs to be updated to handle 64bit LUNs */ 548 rec->scsi_lun = (u32)sc->device->lun; 549 rec->host_scribble = (unsigned long)sc->host_scribble; 550 551 memcpy(rec->scsi_opcode, sc->cmnd, 552 min((int)sc->cmd_len, ZFCP_DBF_SCSI_OPCODE)); 553 554 if (fsf) { 555 rec->fsf_req_id = fsf->req_id; 556 fcp_rsp = (struct fcp_resp_with_ext *) 557 &(fsf->qtcb->bottom.io.fcp_rsp); 558 memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT); 559 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) { 560 fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; 561 rec->fcp_rsp_info = fcp_rsp_info->rsp_code; 562 } 563 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) { 564 rec->pl_len = min((u16)SCSI_SENSE_BUFFERSIZE, 565 (u16)ZFCP_DBF_PAY_MAX_REC); 566 zfcp_dbf_pl_write(dbf, sc->sense_buffer, rec->pl_len, 567 "fcp_sns", fsf->req_id); 568 } 569 } 570 571 debug_event(dbf->scsi, level, rec, sizeof(*rec)); 572 spin_unlock_irqrestore(&dbf->scsi_lock, flags); 573 } 574 575 static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size) 576 { 577 struct debug_info *d; 578 579 d = debug_register(name, size, 1, rec_size); 580 if (!d) 581 return NULL; 582 583 debug_register_view(d, &debug_hex_ascii_view); 584 debug_set_level(d, dbflevel); 585 586 return d; 587 } 588 589 static void zfcp_dbf_unregister(struct zfcp_dbf *dbf) 590 { 591 if (!dbf) 592 return; 593 594 debug_unregister(dbf->scsi); 595 debug_unregister(dbf->san); 596 debug_unregister(dbf->hba); 597 debug_unregister(dbf->pay); 598 debug_unregister(dbf->rec); 599 kfree(dbf); 600 } 601 602 /** 603 * zfcp_adapter_debug_register - registers debug feature for an adapter 604 * @adapter: pointer to adapter for which debug features should be registered 605 * return: -ENOMEM on error, 0 otherwise 606 */ 607 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter) 608 { 609 char name[DEBUG_MAX_NAME_LEN]; 610 struct zfcp_dbf *dbf; 611 612 dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL); 613 if (!dbf) 614 return -ENOMEM; 615 616 spin_lock_init(&dbf->pay_lock); 617 spin_lock_init(&dbf->hba_lock); 618 spin_lock_init(&dbf->san_lock); 619 spin_lock_init(&dbf->scsi_lock); 620 spin_lock_init(&dbf->rec_lock); 621 622 /* debug feature area which records recovery activity */ 623 sprintf(name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev)); 624 dbf->rec = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_rec)); 625 if (!dbf->rec) 626 goto err_out; 627 628 /* debug feature area which records HBA (FSF and QDIO) conditions */ 629 sprintf(name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev)); 630 dbf->hba = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_hba)); 631 if (!dbf->hba) 632 goto err_out; 633 634 /* debug feature area which records payload info */ 635 sprintf(name, "zfcp_%s_pay", dev_name(&adapter->ccw_device->dev)); 636 dbf->pay = zfcp_dbf_reg(name, dbfsize * 2, sizeof(struct zfcp_dbf_pay)); 637 if (!dbf->pay) 638 goto err_out; 639 640 /* debug feature area which records SAN command failures and recovery */ 641 sprintf(name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev)); 642 dbf->san = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_san)); 643 if (!dbf->san) 644 goto err_out; 645 646 /* debug feature area which records SCSI command failures and recovery */ 647 sprintf(name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev)); 648 dbf->scsi = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_scsi)); 649 if (!dbf->scsi) 650 goto err_out; 651 652 adapter->dbf = dbf; 653 654 return 0; 655 err_out: 656 zfcp_dbf_unregister(dbf); 657 return -ENOMEM; 658 } 659 660 /** 661 * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter 662 * @adapter: pointer to adapter for which debug features should be unregistered 663 */ 664 void zfcp_dbf_adapter_unregister(struct zfcp_adapter *adapter) 665 { 666 struct zfcp_dbf *dbf = adapter->dbf; 667 668 adapter->dbf = NULL; 669 zfcp_dbf_unregister(dbf); 670 } 671 672