1 /* 2 * zfcp device driver 3 * 4 * Debug traces for zfcp. 5 * 6 * Copyright IBM Corp. 2002, 2017 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 static int const level = 2; 117 unsigned long flags; 118 119 if (unlikely(!debug_level_enabled(dbf->hba, level))) 120 return; 121 122 spin_lock_irqsave(&dbf->hba_lock, flags); 123 memset(rec, 0, sizeof(*rec)); 124 125 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 126 rec->id = ZFCP_DBF_HBA_USS; 127 rec->fsf_req_id = req->req_id; 128 rec->fsf_req_status = req->status; 129 rec->fsf_cmd = req->fsf_command; 130 131 if (!srb) 132 goto log; 133 134 rec->u.uss.status_type = srb->status_type; 135 rec->u.uss.status_subtype = srb->status_subtype; 136 rec->u.uss.d_id = ntoh24(srb->d_id); 137 rec->u.uss.lun = srb->fcp_lun; 138 memcpy(&rec->u.uss.queue_designator, &srb->queue_designator, 139 sizeof(rec->u.uss.queue_designator)); 140 141 /* status read buffer payload length */ 142 rec->pl_len = (!srb->length) ? 0 : srb->length - 143 offsetof(struct fsf_status_read_buffer, payload); 144 145 if (rec->pl_len) 146 zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len, 147 "fsf_uss", req->req_id); 148 log: 149 debug_event(dbf->hba, level, rec, sizeof(*rec)); 150 spin_unlock_irqrestore(&dbf->hba_lock, flags); 151 } 152 153 /** 154 * zfcp_dbf_hba_bit_err - trace event for bit error conditions 155 * @tag: tag indicating which kind of unsolicited status has been received 156 * @req: request which caused the bit_error condition 157 */ 158 void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req) 159 { 160 struct zfcp_dbf *dbf = req->adapter->dbf; 161 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 162 struct fsf_status_read_buffer *sr_buf = req->data; 163 static int const level = 1; 164 unsigned long flags; 165 166 if (unlikely(!debug_level_enabled(dbf->hba, level))) 167 return; 168 169 spin_lock_irqsave(&dbf->hba_lock, flags); 170 memset(rec, 0, sizeof(*rec)); 171 172 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 173 rec->id = ZFCP_DBF_HBA_BIT; 174 rec->fsf_req_id = req->req_id; 175 rec->fsf_req_status = req->status; 176 rec->fsf_cmd = req->fsf_command; 177 memcpy(&rec->u.be, &sr_buf->payload.bit_error, 178 sizeof(struct fsf_bit_error_payload)); 179 180 debug_event(dbf->hba, level, rec, sizeof(*rec)); 181 spin_unlock_irqrestore(&dbf->hba_lock, flags); 182 } 183 184 /** 185 * zfcp_dbf_hba_def_err - trace event for deferred error messages 186 * @adapter: pointer to struct zfcp_adapter 187 * @req_id: request id which caused the deferred error message 188 * @scount: number of sbals incl. the signaling sbal 189 * @pl: array of all involved sbals 190 */ 191 void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount, 192 void **pl) 193 { 194 struct zfcp_dbf *dbf = adapter->dbf; 195 struct zfcp_dbf_pay *payload = &dbf->pay_buf; 196 unsigned long flags; 197 static int const level = 1; 198 u16 length; 199 200 if (unlikely(!debug_level_enabled(dbf->pay, level))) 201 return; 202 203 if (!pl) 204 return; 205 206 spin_lock_irqsave(&dbf->pay_lock, flags); 207 memset(payload, 0, sizeof(*payload)); 208 209 memcpy(payload->area, "def_err", 7); 210 payload->fsf_req_id = req_id; 211 payload->counter = 0; 212 length = min((u16)sizeof(struct qdio_buffer), 213 (u16)ZFCP_DBF_PAY_MAX_REC); 214 215 while (payload->counter < scount && (char *)pl[payload->counter]) { 216 memcpy(payload->data, (char *)pl[payload->counter], length); 217 debug_event(dbf->pay, level, payload, zfcp_dbf_plen(length)); 218 payload->counter++; 219 } 220 221 spin_unlock_irqrestore(&dbf->pay_lock, flags); 222 } 223 224 /** 225 * zfcp_dbf_hba_basic - trace event for basic adapter events 226 * @adapter: pointer to struct zfcp_adapter 227 */ 228 void zfcp_dbf_hba_basic(char *tag, struct zfcp_adapter *adapter) 229 { 230 struct zfcp_dbf *dbf = adapter->dbf; 231 struct zfcp_dbf_hba *rec = &dbf->hba_buf; 232 static int const level = 1; 233 unsigned long flags; 234 235 if (unlikely(!debug_level_enabled(dbf->hba, level))) 236 return; 237 238 spin_lock_irqsave(&dbf->hba_lock, flags); 239 memset(rec, 0, sizeof(*rec)); 240 241 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 242 rec->id = ZFCP_DBF_HBA_BASIC; 243 244 debug_event(dbf->hba, level, rec, sizeof(*rec)); 245 spin_unlock_irqrestore(&dbf->hba_lock, flags); 246 } 247 248 static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec, 249 struct zfcp_adapter *adapter, 250 struct zfcp_port *port, 251 struct scsi_device *sdev) 252 { 253 rec->adapter_status = atomic_read(&adapter->status); 254 if (port) { 255 rec->port_status = atomic_read(&port->status); 256 rec->wwpn = port->wwpn; 257 rec->d_id = port->d_id; 258 } 259 if (sdev) { 260 rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status); 261 rec->lun = zfcp_scsi_dev_lun(sdev); 262 } else 263 rec->lun = ZFCP_DBF_INVALID_LUN; 264 } 265 266 /** 267 * zfcp_dbf_rec_trig - trace event related to triggered recovery 268 * @tag: identifier for event 269 * @adapter: adapter on which the erp_action should run 270 * @port: remote port involved in the erp_action 271 * @sdev: scsi device involved in the erp_action 272 * @want: wanted erp_action 273 * @need: required erp_action 274 * 275 * The adapter->erp_lock has to be held. 276 */ 277 void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter, 278 struct zfcp_port *port, struct scsi_device *sdev, 279 u8 want, u8 need) 280 { 281 struct zfcp_dbf *dbf = adapter->dbf; 282 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 283 static int const level = 1; 284 struct list_head *entry; 285 unsigned long flags; 286 287 if (unlikely(!debug_level_enabled(dbf->rec, level))) 288 return; 289 290 spin_lock_irqsave(&dbf->rec_lock, flags); 291 memset(rec, 0, sizeof(*rec)); 292 293 rec->id = ZFCP_DBF_REC_TRIG; 294 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 295 zfcp_dbf_set_common(rec, adapter, port, sdev); 296 297 list_for_each(entry, &adapter->erp_ready_head) 298 rec->u.trig.ready++; 299 300 list_for_each(entry, &adapter->erp_running_head) 301 rec->u.trig.running++; 302 303 rec->u.trig.want = want; 304 rec->u.trig.need = need; 305 306 debug_event(dbf->rec, level, rec, sizeof(*rec)); 307 spin_unlock_irqrestore(&dbf->rec_lock, flags); 308 } 309 310 311 /** 312 * zfcp_dbf_rec_run_lvl - trace event related to running recovery 313 * @level: trace level to be used for event 314 * @tag: identifier for event 315 * @erp: erp_action running 316 */ 317 void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp) 318 { 319 struct zfcp_dbf *dbf = erp->adapter->dbf; 320 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 321 unsigned long flags; 322 323 if (!debug_level_enabled(dbf->rec, level)) 324 return; 325 326 spin_lock_irqsave(&dbf->rec_lock, flags); 327 memset(rec, 0, sizeof(*rec)); 328 329 rec->id = ZFCP_DBF_REC_RUN; 330 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 331 zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev); 332 333 rec->u.run.fsf_req_id = erp->fsf_req_id; 334 rec->u.run.rec_status = erp->status; 335 rec->u.run.rec_step = erp->step; 336 rec->u.run.rec_action = erp->action; 337 338 if (erp->sdev) 339 rec->u.run.rec_count = 340 atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter); 341 else if (erp->port) 342 rec->u.run.rec_count = atomic_read(&erp->port->erp_counter); 343 else 344 rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter); 345 346 debug_event(dbf->rec, level, rec, sizeof(*rec)); 347 spin_unlock_irqrestore(&dbf->rec_lock, flags); 348 } 349 350 /** 351 * zfcp_dbf_rec_run - trace event related to running recovery 352 * @tag: identifier for event 353 * @erp: erp_action running 354 */ 355 void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp) 356 { 357 zfcp_dbf_rec_run_lvl(1, tag, erp); 358 } 359 360 /** 361 * zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery 362 * @tag: identifier for event 363 * @wka_port: well known address port 364 * @req_id: request ID to correlate with potential HBA trace record 365 */ 366 void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port, 367 u64 req_id) 368 { 369 struct zfcp_dbf *dbf = wka_port->adapter->dbf; 370 struct zfcp_dbf_rec *rec = &dbf->rec_buf; 371 static int const level = 1; 372 unsigned long flags; 373 374 if (unlikely(!debug_level_enabled(dbf->rec, level))) 375 return; 376 377 spin_lock_irqsave(&dbf->rec_lock, flags); 378 memset(rec, 0, sizeof(*rec)); 379 380 rec->id = ZFCP_DBF_REC_RUN; 381 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 382 rec->port_status = wka_port->status; 383 rec->d_id = wka_port->d_id; 384 rec->lun = ZFCP_DBF_INVALID_LUN; 385 386 rec->u.run.fsf_req_id = req_id; 387 rec->u.run.rec_status = ~0; 388 rec->u.run.rec_step = ~0; 389 rec->u.run.rec_action = ~0; 390 rec->u.run.rec_count = ~0; 391 392 debug_event(dbf->rec, level, rec, sizeof(*rec)); 393 spin_unlock_irqrestore(&dbf->rec_lock, flags); 394 } 395 396 #define ZFCP_DBF_SAN_LEVEL 1 397 398 static inline 399 void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf, 400 char *paytag, struct scatterlist *sg, u8 id, u16 len, 401 u64 req_id, u32 d_id, u16 cap_len) 402 { 403 struct zfcp_dbf_san *rec = &dbf->san_buf; 404 u16 rec_len; 405 unsigned long flags; 406 struct zfcp_dbf_pay *payload = &dbf->pay_buf; 407 u16 pay_sum = 0; 408 409 spin_lock_irqsave(&dbf->san_lock, flags); 410 memset(rec, 0, sizeof(*rec)); 411 412 rec->id = id; 413 rec->fsf_req_id = req_id; 414 rec->d_id = d_id; 415 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 416 rec->pl_len = len; /* full length even if we cap pay below */ 417 if (!sg) 418 goto out; 419 rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD); 420 memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */ 421 if (len <= rec_len) 422 goto out; /* skip pay record if full content in rec->payload */ 423 424 /* if (len > rec_len): 425 * dump data up to cap_len ignoring small duplicate in rec->payload 426 */ 427 spin_lock(&dbf->pay_lock); 428 memset(payload, 0, sizeof(*payload)); 429 memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN); 430 payload->fsf_req_id = req_id; 431 payload->counter = 0; 432 for (; sg && pay_sum < cap_len; sg = sg_next(sg)) { 433 u16 pay_len, offset = 0; 434 435 while (offset < sg->length && pay_sum < cap_len) { 436 pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC, 437 (u16)(sg->length - offset)); 438 /* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */ 439 memcpy(payload->data, sg_virt(sg) + offset, pay_len); 440 debug_event(dbf->pay, ZFCP_DBF_SAN_LEVEL, payload, 441 zfcp_dbf_plen(pay_len)); 442 payload->counter++; 443 offset += pay_len; 444 pay_sum += pay_len; 445 } 446 } 447 spin_unlock(&dbf->pay_lock); 448 449 out: 450 debug_event(dbf->san, ZFCP_DBF_SAN_LEVEL, rec, sizeof(*rec)); 451 spin_unlock_irqrestore(&dbf->san_lock, flags); 452 } 453 454 /** 455 * zfcp_dbf_san_req - trace event for issued SAN request 456 * @tag: identifier for event 457 * @fsf_req: request containing issued CT data 458 * d_id: destination ID 459 */ 460 void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id) 461 { 462 struct zfcp_dbf *dbf = fsf->adapter->dbf; 463 struct zfcp_fsf_ct_els *ct_els = fsf->data; 464 u16 length; 465 466 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) 467 return; 468 469 length = (u16)zfcp_qdio_real_bytes(ct_els->req); 470 zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ, 471 length, fsf->req_id, d_id, length); 472 } 473 474 static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag, 475 struct zfcp_fsf_req *fsf, 476 u16 len) 477 { 478 struct zfcp_fsf_ct_els *ct_els = fsf->data; 479 struct fc_ct_hdr *reqh = sg_virt(ct_els->req); 480 struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1); 481 struct scatterlist *resp_entry = ct_els->resp; 482 struct fc_ct_hdr *resph; 483 struct fc_gpn_ft_resp *acc; 484 int max_entries, x, last = 0; 485 486 if (!(memcmp(tag, "fsscth2", 7) == 0 487 && ct_els->d_id == FC_FID_DIR_SERV 488 && reqh->ct_rev == FC_CT_REV 489 && reqh->ct_in_id[0] == 0 490 && reqh->ct_in_id[1] == 0 491 && reqh->ct_in_id[2] == 0 492 && reqh->ct_fs_type == FC_FST_DIR 493 && reqh->ct_fs_subtype == FC_NS_SUBTYPE 494 && reqh->ct_options == 0 495 && reqh->_ct_resvd1 == 0 496 && reqh->ct_cmd == cpu_to_be16(FC_NS_GPN_FT) 497 /* reqh->ct_mr_size can vary so do not match but read below */ 498 && reqh->_ct_resvd2 == 0 499 && reqh->ct_reason == 0 500 && reqh->ct_explan == 0 501 && reqh->ct_vendor == 0 502 && reqn->fn_resvd == 0 503 && reqn->fn_domain_id_scope == 0 504 && reqn->fn_area_id_scope == 0 505 && reqn->fn_fc4_type == FC_TYPE_FCP)) 506 return len; /* not GPN_FT response so do not cap */ 507 508 acc = sg_virt(resp_entry); 509 510 /* cap all but accept CT responses to at least the CT header */ 511 resph = (struct fc_ct_hdr *)acc; 512 if ((ct_els->status) || 513 (resph->ct_cmd != cpu_to_be16(FC_FS_ACC))) 514 return max(FC_CT_HDR_LEN, ZFCP_DBF_SAN_MAX_PAYLOAD); 515 516 max_entries = (be16_to_cpu(reqh->ct_mr_size) * 4 / 517 sizeof(struct fc_gpn_ft_resp)) 518 + 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one 519 * to account for header as 1st pseudo "entry" */; 520 521 /* the basic CT_IU preamble is the same size as one entry in the GPN_FT 522 * response, allowing us to skip special handling for it - just skip it 523 */ 524 for (x = 1; x < max_entries && !last; x++) { 525 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) 526 acc++; 527 else 528 acc = sg_virt(++resp_entry); 529 530 last = acc->fp_flags & FC_NS_FID_LAST; 531 } 532 len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp))); 533 return len; /* cap after last entry */ 534 } 535 536 /** 537 * zfcp_dbf_san_res - trace event for received SAN request 538 * @tag: identifier for event 539 * @fsf_req: request containing issued CT data 540 */ 541 void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf) 542 { 543 struct zfcp_dbf *dbf = fsf->adapter->dbf; 544 struct zfcp_fsf_ct_els *ct_els = fsf->data; 545 u16 length; 546 547 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) 548 return; 549 550 length = (u16)zfcp_qdio_real_bytes(ct_els->resp); 551 zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES, 552 length, fsf->req_id, ct_els->d_id, 553 zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length)); 554 } 555 556 /** 557 * zfcp_dbf_san_in_els - trace event for incoming ELS 558 * @tag: identifier for event 559 * @fsf_req: request containing issued CT data 560 */ 561 void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf) 562 { 563 struct zfcp_dbf *dbf = fsf->adapter->dbf; 564 struct fsf_status_read_buffer *srb = 565 (struct fsf_status_read_buffer *) fsf->data; 566 u16 length; 567 struct scatterlist sg; 568 569 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL))) 570 return; 571 572 length = (u16)(srb->length - 573 offsetof(struct fsf_status_read_buffer, payload)); 574 sg_init_one(&sg, srb->payload.data, length); 575 zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length, 576 fsf->req_id, ntoh24(srb->d_id), length); 577 } 578 579 /** 580 * zfcp_dbf_scsi - trace event for scsi commands 581 * @tag: identifier for event 582 * @sc: pointer to struct scsi_cmnd 583 * @fsf: pointer to struct zfcp_fsf_req 584 */ 585 void zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *sc, 586 struct zfcp_fsf_req *fsf) 587 { 588 struct zfcp_adapter *adapter = 589 (struct zfcp_adapter *) sc->device->host->hostdata[0]; 590 struct zfcp_dbf *dbf = adapter->dbf; 591 struct zfcp_dbf_scsi *rec = &dbf->scsi_buf; 592 struct fcp_resp_with_ext *fcp_rsp; 593 struct fcp_resp_rsp_info *fcp_rsp_info; 594 unsigned long flags; 595 596 spin_lock_irqsave(&dbf->scsi_lock, flags); 597 memset(rec, 0, sizeof(*rec)); 598 599 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN); 600 rec->id = ZFCP_DBF_SCSI_CMND; 601 rec->scsi_result = sc->result; 602 rec->scsi_retries = sc->retries; 603 rec->scsi_allowed = sc->allowed; 604 rec->scsi_id = sc->device->id; 605 rec->scsi_lun = (u32)sc->device->lun; 606 rec->scsi_lun_64_hi = (u32)(sc->device->lun >> 32); 607 rec->host_scribble = (unsigned long)sc->host_scribble; 608 609 memcpy(rec->scsi_opcode, sc->cmnd, 610 min((int)sc->cmd_len, ZFCP_DBF_SCSI_OPCODE)); 611 612 if (fsf) { 613 rec->fsf_req_id = fsf->req_id; 614 rec->pl_len = FCP_RESP_WITH_EXT; 615 fcp_rsp = &(fsf->qtcb->bottom.io.fcp_rsp.iu); 616 /* mandatory parts of FCP_RSP IU in this SCSI record */ 617 memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT); 618 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) { 619 fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; 620 rec->fcp_rsp_info = fcp_rsp_info->rsp_code; 621 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_rsp_len); 622 } 623 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) { 624 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_sns_len); 625 } 626 /* complete FCP_RSP IU in associated PAYload record 627 * but only if there are optional parts 628 */ 629 if (fcp_rsp->resp.fr_flags != 0) 630 zfcp_dbf_pl_write( 631 dbf, fcp_rsp, 632 /* at least one full PAY record 633 * but not beyond hardware response field 634 */ 635 min_t(u16, max_t(u16, rec->pl_len, 636 ZFCP_DBF_PAY_MAX_REC), 637 FSF_FCP_RSP_SIZE), 638 "fcp_riu", fsf->req_id); 639 } 640 641 debug_event(dbf->scsi, level, rec, sizeof(*rec)); 642 spin_unlock_irqrestore(&dbf->scsi_lock, flags); 643 } 644 645 static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size) 646 { 647 struct debug_info *d; 648 649 d = debug_register(name, size, 1, rec_size); 650 if (!d) 651 return NULL; 652 653 debug_register_view(d, &debug_hex_ascii_view); 654 debug_set_level(d, dbflevel); 655 656 return d; 657 } 658 659 static void zfcp_dbf_unregister(struct zfcp_dbf *dbf) 660 { 661 if (!dbf) 662 return; 663 664 debug_unregister(dbf->scsi); 665 debug_unregister(dbf->san); 666 debug_unregister(dbf->hba); 667 debug_unregister(dbf->pay); 668 debug_unregister(dbf->rec); 669 kfree(dbf); 670 } 671 672 /** 673 * zfcp_adapter_debug_register - registers debug feature for an adapter 674 * @adapter: pointer to adapter for which debug features should be registered 675 * return: -ENOMEM on error, 0 otherwise 676 */ 677 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter) 678 { 679 char name[DEBUG_MAX_NAME_LEN]; 680 struct zfcp_dbf *dbf; 681 682 dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL); 683 if (!dbf) 684 return -ENOMEM; 685 686 spin_lock_init(&dbf->pay_lock); 687 spin_lock_init(&dbf->hba_lock); 688 spin_lock_init(&dbf->san_lock); 689 spin_lock_init(&dbf->scsi_lock); 690 spin_lock_init(&dbf->rec_lock); 691 692 /* debug feature area which records recovery activity */ 693 sprintf(name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev)); 694 dbf->rec = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_rec)); 695 if (!dbf->rec) 696 goto err_out; 697 698 /* debug feature area which records HBA (FSF and QDIO) conditions */ 699 sprintf(name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev)); 700 dbf->hba = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_hba)); 701 if (!dbf->hba) 702 goto err_out; 703 704 /* debug feature area which records payload info */ 705 sprintf(name, "zfcp_%s_pay", dev_name(&adapter->ccw_device->dev)); 706 dbf->pay = zfcp_dbf_reg(name, dbfsize * 2, sizeof(struct zfcp_dbf_pay)); 707 if (!dbf->pay) 708 goto err_out; 709 710 /* debug feature area which records SAN command failures and recovery */ 711 sprintf(name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev)); 712 dbf->san = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_san)); 713 if (!dbf->san) 714 goto err_out; 715 716 /* debug feature area which records SCSI command failures and recovery */ 717 sprintf(name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev)); 718 dbf->scsi = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_scsi)); 719 if (!dbf->scsi) 720 goto err_out; 721 722 adapter->dbf = dbf; 723 724 return 0; 725 err_out: 726 zfcp_dbf_unregister(dbf); 727 return -ENOMEM; 728 } 729 730 /** 731 * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter 732 * @adapter: pointer to adapter for which debug features should be unregistered 733 */ 734 void zfcp_dbf_adapter_unregister(struct zfcp_adapter *adapter) 735 { 736 struct zfcp_dbf *dbf = adapter->dbf; 737 738 adapter->dbf = NULL; 739 zfcp_dbf_unregister(dbf); 740 } 741 742