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1// SPDX-License-Identifier: GPL-2.02/*3 * zfcp device driver4 *5 * Debug traces for zfcp.6 *7 * Copyright IBM Corp. 2002, 20238 */9 10#define KMSG_COMPONENT "zfcp"11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt12 13#include <linux/module.h>14#include <linux/ctype.h>15#include <linux/slab.h>16#include <asm/debug.h>17#include "zfcp_dbf.h"18#include "zfcp_ext.h"19#include "zfcp_fc.h"20 21static u32 dbfsize = 4;22 23module_param(dbfsize, uint, 0400);24MODULE_PARM_DESC(dbfsize,25 "number of pages for each debug feature area (default 4)");26 27static u32 dbflevel = 3;28 29module_param(dbflevel, uint, 0400);30MODULE_PARM_DESC(dbflevel,31 "log level for each debug feature area "32 "(default 3, range 0..6)");33 34static inline unsigned int zfcp_dbf_plen(unsigned int offset)35{36 return sizeof(struct zfcp_dbf_pay) + offset - ZFCP_DBF_PAY_MAX_REC;37}38 39static inline40void zfcp_dbf_pl_write(struct zfcp_dbf *dbf, void *data, u16 length, char *area,41 u64 req_id)42{43 struct zfcp_dbf_pay *pl = &dbf->pay_buf;44 u16 offset = 0, rec_length;45 46 spin_lock(&dbf->pay_lock);47 memset(pl, 0, sizeof(*pl));48 pl->fsf_req_id = req_id;49 memcpy(pl->area, area, ZFCP_DBF_TAG_LEN);50 51 while (offset < length) {52 rec_length = min((u16) ZFCP_DBF_PAY_MAX_REC,53 (u16) (length - offset));54 memcpy(pl->data, data + offset, rec_length);55 debug_event(dbf->pay, 1, pl, zfcp_dbf_plen(rec_length));56 57 offset += rec_length;58 pl->counter++;59 }60 61 spin_unlock(&dbf->pay_lock);62}63 64/**65 * zfcp_dbf_hba_fsf_res - trace event for fsf responses66 * @tag: tag indicating which kind of FSF response has been received67 * @level: trace level to be used for event68 * @req: request for which a response was received69 */70void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req)71{72 struct zfcp_dbf *dbf = req->adapter->dbf;73 struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix;74 struct fsf_qtcb_header *q_head = &req->qtcb->header;75 struct zfcp_dbf_hba *rec = &dbf->hba_buf;76 unsigned long flags;77 78 spin_lock_irqsave(&dbf->hba_lock, flags);79 memset(rec, 0, sizeof(*rec));80 81 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);82 rec->id = ZFCP_DBF_HBA_RES;83 rec->fsf_req_id = req->req_id;84 rec->fsf_req_status = req->status;85 rec->fsf_cmd = q_head->fsf_command;86 rec->fsf_seq_no = q_pref->req_seq_no;87 rec->u.res.req_issued = req->issued;88 rec->u.res.prot_status = q_pref->prot_status;89 rec->u.res.fsf_status = q_head->fsf_status;90 rec->u.res.port_handle = q_head->port_handle;91 rec->u.res.lun_handle = q_head->lun_handle;92 93 memcpy(rec->u.res.prot_status_qual, &q_pref->prot_status_qual,94 FSF_PROT_STATUS_QUAL_SIZE);95 memcpy(rec->u.res.fsf_status_qual, &q_head->fsf_status_qual,96 FSF_STATUS_QUALIFIER_SIZE);97 98 rec->pl_len = q_head->log_length;99 zfcp_dbf_pl_write(dbf, (char *)q_pref + q_head->log_start,100 rec->pl_len, "fsf_res", req->req_id);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_fces - trace event for fsf responses related to108 * FC Endpoint Security (FCES)109 * @tag: tag indicating which kind of FC Endpoint Security event has occurred110 * @req: request for which a response was received111 * @wwpn: remote port or ZFCP_DBF_INVALID_WWPN112 * @fc_security_old: old FC Endpoint Security of FCP device or connection113 * @fc_security_new: new FC Endpoint Security of FCP device or connection114 */115void zfcp_dbf_hba_fsf_fces(char *tag, const struct zfcp_fsf_req *req, u64 wwpn,116 u32 fc_security_old, u32 fc_security_new)117{118 struct zfcp_dbf *dbf = req->adapter->dbf;119 struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix;120 struct fsf_qtcb_header *q_head = &req->qtcb->header;121 struct zfcp_dbf_hba *rec = &dbf->hba_buf;122 static int const level = 3;123 unsigned long flags;124 125 if (unlikely(!debug_level_enabled(dbf->hba, level)))126 return;127 128 spin_lock_irqsave(&dbf->hba_lock, flags);129 memset(rec, 0, sizeof(*rec));130 131 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);132 rec->id = ZFCP_DBF_HBA_FCES;133 rec->fsf_req_id = req->req_id;134 rec->fsf_req_status = req->status;135 rec->fsf_cmd = q_head->fsf_command;136 rec->fsf_seq_no = q_pref->req_seq_no;137 rec->u.fces.req_issued = req->issued;138 rec->u.fces.fsf_status = q_head->fsf_status;139 rec->u.fces.port_handle = q_head->port_handle;140 rec->u.fces.wwpn = wwpn;141 rec->u.fces.fc_security_old = fc_security_old;142 rec->u.fces.fc_security_new = fc_security_new;143 144 debug_event(dbf->hba, level, rec, sizeof(*rec));145 spin_unlock_irqrestore(&dbf->hba_lock, flags);146}147 148/**149 * zfcp_dbf_hba_fsf_reqid - trace only the tag and a request ID150 * @tag: tag documenting the source151 * @level: trace level152 * @adapter: adapter instance the request ID belongs to153 * @req_id: the request ID to trace154 */155void zfcp_dbf_hba_fsf_reqid(const char *const tag, const int level,156 struct zfcp_adapter *const adapter,157 const u64 req_id)158{159 struct zfcp_dbf *const dbf = adapter->dbf;160 struct zfcp_dbf_hba *const rec = &dbf->hba_buf;161 struct zfcp_dbf_hba_res *const res = &rec->u.res;162 unsigned long flags;163 164 if (unlikely(!debug_level_enabled(dbf->hba, level)))165 return;166 167 spin_lock_irqsave(&dbf->hba_lock, flags);168 memset(rec, 0, sizeof(*rec));169 170 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);171 172 rec->id = ZFCP_DBF_HBA_RES;173 rec->fsf_req_id = req_id;174 rec->fsf_req_status = ~0u;175 rec->fsf_cmd = ~0u;176 rec->fsf_seq_no = ~0u;177 178 res->req_issued = ~0ull;179 res->prot_status = ~0u;180 memset(res->prot_status_qual, 0xff, sizeof(res->prot_status_qual));181 res->fsf_status = ~0u;182 memset(res->fsf_status_qual, 0xff, sizeof(res->fsf_status_qual));183 res->port_handle = ~0u;184 res->lun_handle = ~0u;185 186 debug_event(dbf->hba, level, rec, sizeof(*rec));187 spin_unlock_irqrestore(&dbf->hba_lock, flags);188}189 190/**191 * zfcp_dbf_hba_fsf_uss - trace event for an unsolicited status buffer192 * @tag: tag indicating which kind of unsolicited status has been received193 * @req: request providing the unsolicited status194 */195void zfcp_dbf_hba_fsf_uss(char *tag, struct zfcp_fsf_req *req)196{197 struct zfcp_dbf *dbf = req->adapter->dbf;198 struct fsf_status_read_buffer *srb = req->data;199 struct zfcp_dbf_hba *rec = &dbf->hba_buf;200 static int const level = 2;201 unsigned long flags;202 203 if (unlikely(!debug_level_enabled(dbf->hba, level)))204 return;205 206 spin_lock_irqsave(&dbf->hba_lock, flags);207 memset(rec, 0, sizeof(*rec));208 209 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);210 rec->id = ZFCP_DBF_HBA_USS;211 rec->fsf_req_id = req->req_id;212 rec->fsf_req_status = req->status;213 rec->fsf_cmd = FSF_QTCB_UNSOLICITED_STATUS;214 215 if (!srb)216 goto log;217 218 rec->u.uss.status_type = srb->status_type;219 rec->u.uss.status_subtype = srb->status_subtype;220 rec->u.uss.d_id = ntoh24(srb->d_id);221 rec->u.uss.lun = srb->fcp_lun;222 memcpy(&rec->u.uss.queue_designator, &srb->queue_designator,223 sizeof(rec->u.uss.queue_designator));224 225 /* status read buffer payload length */226 rec->pl_len = (!srb->length) ? 0 : srb->length -227 offsetof(struct fsf_status_read_buffer, payload);228 229 if (rec->pl_len)230 zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len,231 "fsf_uss", req->req_id);232log:233 debug_event(dbf->hba, level, rec, sizeof(*rec));234 spin_unlock_irqrestore(&dbf->hba_lock, flags);235}236 237/**238 * zfcp_dbf_hba_bit_err - trace event for bit error conditions239 * @tag: tag indicating which kind of bit error unsolicited status was received240 * @req: request which caused the bit_error condition241 */242void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req)243{244 struct zfcp_dbf *dbf = req->adapter->dbf;245 struct zfcp_dbf_hba *rec = &dbf->hba_buf;246 struct fsf_status_read_buffer *sr_buf = req->data;247 static int const level = 1;248 unsigned long flags;249 250 if (unlikely(!debug_level_enabled(dbf->hba, level)))251 return;252 253 spin_lock_irqsave(&dbf->hba_lock, flags);254 memset(rec, 0, sizeof(*rec));255 256 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);257 rec->id = ZFCP_DBF_HBA_BIT;258 rec->fsf_req_id = req->req_id;259 rec->fsf_req_status = req->status;260 rec->fsf_cmd = FSF_QTCB_UNSOLICITED_STATUS;261 memcpy(&rec->u.be, &sr_buf->payload.bit_error,262 sizeof(struct fsf_bit_error_payload));263 264 debug_event(dbf->hba, level, rec, sizeof(*rec));265 spin_unlock_irqrestore(&dbf->hba_lock, flags);266}267 268/**269 * zfcp_dbf_hba_def_err - trace event for deferred error messages270 * @adapter: pointer to struct zfcp_adapter271 * @req_id: request id which caused the deferred error message272 * @scount: number of sbals incl. the signaling sbal273 * @pl: array of all involved sbals274 */275void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount,276 void **pl)277{278 struct zfcp_dbf *dbf = adapter->dbf;279 struct zfcp_dbf_pay *payload = &dbf->pay_buf;280 unsigned long flags;281 static int const level = 1;282 u16 length;283 284 if (unlikely(!debug_level_enabled(dbf->pay, level)))285 return;286 287 if (!pl)288 return;289 290 spin_lock_irqsave(&dbf->pay_lock, flags);291 memset(payload, 0, sizeof(*payload));292 293 memcpy(payload->area, "def_err", 7);294 payload->fsf_req_id = req_id;295 payload->counter = 0;296 length = min((u16)sizeof(struct qdio_buffer),297 (u16)ZFCP_DBF_PAY_MAX_REC);298 299 while (payload->counter < scount && (char *)pl[payload->counter]) {300 memcpy(payload->data, (char *)pl[payload->counter], length);301 debug_event(dbf->pay, level, payload, zfcp_dbf_plen(length));302 payload->counter++;303 }304 305 spin_unlock_irqrestore(&dbf->pay_lock, flags);306}307 308static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec,309 struct zfcp_adapter *adapter,310 struct zfcp_port *port,311 struct scsi_device *sdev)312{313 rec->adapter_status = atomic_read(&adapter->status);314 if (port) {315 rec->port_status = atomic_read(&port->status);316 rec->wwpn = port->wwpn;317 rec->d_id = port->d_id;318 }319 if (sdev) {320 rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status);321 rec->lun = zfcp_scsi_dev_lun(sdev);322 } else323 rec->lun = ZFCP_DBF_INVALID_LUN;324}325 326/**327 * zfcp_dbf_rec_trig - trace event related to triggered recovery328 * @tag: identifier for event329 * @adapter: adapter on which the erp_action should run330 * @port: remote port involved in the erp_action331 * @sdev: scsi device involved in the erp_action332 * @want: wanted erp_action333 * @need: required erp_action334 *335 * The adapter->erp_lock has to be held.336 */337void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter,338 struct zfcp_port *port, struct scsi_device *sdev,339 u8 want, u8 need)340{341 struct zfcp_dbf *dbf = adapter->dbf;342 struct zfcp_dbf_rec *rec = &dbf->rec_buf;343 static int const level = 1;344 struct list_head *entry;345 unsigned long flags;346 347 lockdep_assert_held(&adapter->erp_lock);348 349 if (unlikely(!debug_level_enabled(dbf->rec, level)))350 return;351 352 spin_lock_irqsave(&dbf->rec_lock, flags);353 memset(rec, 0, sizeof(*rec));354 355 rec->id = ZFCP_DBF_REC_TRIG;356 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);357 zfcp_dbf_set_common(rec, adapter, port, sdev);358 359 list_for_each(entry, &adapter->erp_ready_head)360 rec->u.trig.ready++;361 362 list_for_each(entry, &adapter->erp_running_head)363 rec->u.trig.running++;364 365 rec->u.trig.want = want;366 rec->u.trig.need = need;367 368 debug_event(dbf->rec, level, rec, sizeof(*rec));369 spin_unlock_irqrestore(&dbf->rec_lock, flags);370}371 372/**373 * zfcp_dbf_rec_trig_lock - trace event related to triggered recovery with lock374 * @tag: identifier for event375 * @adapter: adapter on which the erp_action should run376 * @port: remote port involved in the erp_action377 * @sdev: scsi device involved in the erp_action378 * @want: wanted erp_action379 * @need: required erp_action380 *381 * The adapter->erp_lock must not be held.382 */383void zfcp_dbf_rec_trig_lock(char *tag, struct zfcp_adapter *adapter,384 struct zfcp_port *port, struct scsi_device *sdev,385 u8 want, u8 need)386{387 unsigned long flags;388 389 read_lock_irqsave(&adapter->erp_lock, flags);390 zfcp_dbf_rec_trig(tag, adapter, port, sdev, want, need);391 read_unlock_irqrestore(&adapter->erp_lock, flags);392}393 394/**395 * zfcp_dbf_rec_run_lvl - trace event related to running recovery396 * @level: trace level to be used for event397 * @tag: identifier for event398 * @erp: erp_action running399 */400void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp)401{402 struct zfcp_dbf *dbf = erp->adapter->dbf;403 struct zfcp_dbf_rec *rec = &dbf->rec_buf;404 unsigned long flags;405 406 if (!debug_level_enabled(dbf->rec, level))407 return;408 409 spin_lock_irqsave(&dbf->rec_lock, flags);410 memset(rec, 0, sizeof(*rec));411 412 rec->id = ZFCP_DBF_REC_RUN;413 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);414 zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev);415 416 rec->u.run.fsf_req_id = erp->fsf_req_id;417 rec->u.run.rec_status = erp->status;418 rec->u.run.rec_step = erp->step;419 rec->u.run.rec_action = erp->type;420 421 if (erp->sdev)422 rec->u.run.rec_count =423 atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter);424 else if (erp->port)425 rec->u.run.rec_count = atomic_read(&erp->port->erp_counter);426 else427 rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter);428 429 debug_event(dbf->rec, level, rec, sizeof(*rec));430 spin_unlock_irqrestore(&dbf->rec_lock, flags);431}432 433/**434 * zfcp_dbf_rec_run - trace event related to running recovery435 * @tag: identifier for event436 * @erp: erp_action running437 */438void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp)439{440 zfcp_dbf_rec_run_lvl(1, tag, erp);441}442 443/**444 * zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery445 * @tag: identifier for event446 * @wka_port: well known address port447 * @req_id: request ID to correlate with potential HBA trace record448 */449void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port,450 u64 req_id)451{452 struct zfcp_dbf *dbf = wka_port->adapter->dbf;453 struct zfcp_dbf_rec *rec = &dbf->rec_buf;454 static int const level = 1;455 unsigned long flags;456 457 if (unlikely(!debug_level_enabled(dbf->rec, level)))458 return;459 460 spin_lock_irqsave(&dbf->rec_lock, flags);461 memset(rec, 0, sizeof(*rec));462 463 rec->id = ZFCP_DBF_REC_RUN;464 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);465 rec->port_status = wka_port->status;466 rec->d_id = wka_port->d_id;467 rec->lun = ZFCP_DBF_INVALID_LUN;468 469 rec->u.run.fsf_req_id = req_id;470 rec->u.run.rec_status = ~0;471 rec->u.run.rec_step = ~0;472 rec->u.run.rec_action = ~0;473 rec->u.run.rec_count = ~0;474 475 debug_event(dbf->rec, level, rec, sizeof(*rec));476 spin_unlock_irqrestore(&dbf->rec_lock, flags);477}478 479#define ZFCP_DBF_SAN_LEVEL 1480 481static inline482void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf,483 char *paytag, struct scatterlist *sg, u8 id, u16 len,484 u64 req_id, u32 d_id, u16 cap_len)485{486 struct zfcp_dbf_san *rec = &dbf->san_buf;487 u16 rec_len;488 unsigned long flags;489 struct zfcp_dbf_pay *payload = &dbf->pay_buf;490 u16 pay_sum = 0;491 492 spin_lock_irqsave(&dbf->san_lock, flags);493 memset(rec, 0, sizeof(*rec));494 495 rec->id = id;496 rec->fsf_req_id = req_id;497 rec->d_id = d_id;498 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);499 rec->pl_len = len; /* full length even if we cap pay below */500 if (!sg)501 goto out;502 rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD);503 memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */504 if (len <= rec_len)505 goto out; /* skip pay record if full content in rec->payload */506 507 /* if (len > rec_len):508 * dump data up to cap_len ignoring small duplicate in rec->payload509 */510 spin_lock(&dbf->pay_lock);511 memset(payload, 0, sizeof(*payload));512 memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN);513 payload->fsf_req_id = req_id;514 payload->counter = 0;515 for (; sg && pay_sum < cap_len; sg = sg_next(sg)) {516 u16 pay_len, offset = 0;517 518 while (offset < sg->length && pay_sum < cap_len) {519 pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC,520 (u16)(sg->length - offset));521 /* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */522 memcpy(payload->data, sg_virt(sg) + offset, pay_len);523 debug_event(dbf->pay, ZFCP_DBF_SAN_LEVEL, payload,524 zfcp_dbf_plen(pay_len));525 payload->counter++;526 offset += pay_len;527 pay_sum += pay_len;528 }529 }530 spin_unlock(&dbf->pay_lock);531 532out:533 debug_event(dbf->san, ZFCP_DBF_SAN_LEVEL, rec, sizeof(*rec));534 spin_unlock_irqrestore(&dbf->san_lock, flags);535}536 537/**538 * zfcp_dbf_san_req - trace event for issued SAN request539 * @tag: identifier for event540 * @fsf: request containing issued CT or ELS data541 * @d_id: N_Port_ID where SAN request is sent to542 * d_id: destination ID543 */544void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id)545{546 struct zfcp_dbf *dbf = fsf->adapter->dbf;547 struct zfcp_fsf_ct_els *ct_els = fsf->data;548 u16 length;549 550 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))551 return;552 553 length = (u16)zfcp_qdio_real_bytes(ct_els->req);554 zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ,555 length, fsf->req_id, d_id, length);556}557 558static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag,559 struct zfcp_fsf_req *fsf,560 u16 len)561{562 struct zfcp_fsf_ct_els *ct_els = fsf->data;563 struct fc_ct_hdr *reqh = sg_virt(ct_els->req);564 struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1);565 struct scatterlist *resp_entry = ct_els->resp;566 struct fc_ct_hdr *resph;567 struct fc_gpn_ft_resp *acc;568 int max_entries, x, last = 0;569 570 if (!(memcmp(tag, "fsscth2", 7) == 0571 && ct_els->d_id == FC_FID_DIR_SERV572 && reqh->ct_rev == FC_CT_REV573 && reqh->ct_in_id[0] == 0574 && reqh->ct_in_id[1] == 0575 && reqh->ct_in_id[2] == 0576 && reqh->ct_fs_type == FC_FST_DIR577 && reqh->ct_fs_subtype == FC_NS_SUBTYPE578 && reqh->ct_options == 0579 && reqh->_ct_resvd1 == 0580 && reqh->ct_cmd == cpu_to_be16(FC_NS_GPN_FT)581 /* reqh->ct_mr_size can vary so do not match but read below */582 && reqh->_ct_resvd2 == 0583 && reqh->ct_reason == 0584 && reqh->ct_explan == 0585 && reqh->ct_vendor == 0586 && reqn->fn_resvd == 0587 && reqn->fn_domain_id_scope == 0588 && reqn->fn_area_id_scope == 0589 && reqn->fn_fc4_type == FC_TYPE_FCP))590 return len; /* not GPN_FT response so do not cap */591 592 acc = sg_virt(resp_entry);593 594 /* cap all but accept CT responses to at least the CT header */595 resph = (struct fc_ct_hdr *)acc;596 if ((ct_els->status) ||597 (resph->ct_cmd != cpu_to_be16(FC_FS_ACC)))598 return max(FC_CT_HDR_LEN, ZFCP_DBF_SAN_MAX_PAYLOAD);599 600 max_entries = (be16_to_cpu(reqh->ct_mr_size) * 4 /601 sizeof(struct fc_gpn_ft_resp))602 + 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one603 * to account for header as 1st pseudo "entry" */;604 605 /* the basic CT_IU preamble is the same size as one entry in the GPN_FT606 * response, allowing us to skip special handling for it - just skip it607 */608 for (x = 1; x < max_entries && !last; x++) {609 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))610 acc++;611 else612 acc = sg_virt(++resp_entry);613 614 last = acc->fp_flags & FC_NS_FID_LAST;615 }616 len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp)));617 return len; /* cap after last entry */618}619 620/**621 * zfcp_dbf_san_res - trace event for received SAN request622 * @tag: identifier for event623 * @fsf: request containing received CT or ELS data624 */625void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf)626{627 struct zfcp_dbf *dbf = fsf->adapter->dbf;628 struct zfcp_fsf_ct_els *ct_els = fsf->data;629 u16 length;630 631 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))632 return;633 634 length = (u16)zfcp_qdio_real_bytes(ct_els->resp);635 zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES,636 length, fsf->req_id, ct_els->d_id,637 zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length));638}639 640/**641 * zfcp_dbf_san_in_els - trace event for incoming ELS642 * @tag: identifier for event643 * @fsf: request containing received ELS data644 */645void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf)646{647 struct zfcp_dbf *dbf = fsf->adapter->dbf;648 struct fsf_status_read_buffer *srb =649 (struct fsf_status_read_buffer *) fsf->data;650 u16 length;651 struct scatterlist sg;652 653 if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))654 return;655 656 length = (u16)(srb->length -657 offsetof(struct fsf_status_read_buffer, payload));658 sg_init_one(&sg, srb->payload.data, length);659 zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length,660 fsf->req_id, ntoh24(srb->d_id), length);661}662 663/**664 * zfcp_dbf_scsi_common() - Common trace event helper for scsi.665 * @tag: Identifier for event.666 * @level: trace level of event.667 * @sdev: Pointer to SCSI device as context for this event.668 * @sc: Pointer to SCSI command, or NULL with task management function (TMF).669 * @fsf: Pointer to FSF request, or NULL.670 */671void zfcp_dbf_scsi_common(char *tag, int level, struct scsi_device *sdev,672 struct scsi_cmnd *sc, struct zfcp_fsf_req *fsf)673{674 struct zfcp_adapter *adapter =675 (struct zfcp_adapter *) sdev->host->hostdata[0];676 struct zfcp_dbf *dbf = adapter->dbf;677 struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;678 struct fcp_resp_with_ext *fcp_rsp;679 struct fcp_resp_rsp_info *fcp_rsp_info;680 unsigned long flags;681 682 spin_lock_irqsave(&dbf->scsi_lock, flags);683 memset(rec, 0, sizeof(*rec));684 685 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);686 rec->id = ZFCP_DBF_SCSI_CMND;687 if (sc) {688 rec->scsi_result = sc->result;689 rec->scsi_retries = sc->retries;690 rec->scsi_allowed = sc->allowed;691 rec->scsi_id = sc->device->id;692 rec->scsi_lun = (u32)sc->device->lun;693 rec->scsi_lun_64_hi = (u32)(sc->device->lun >> 32);694 rec->host_scribble = (u64)sc->host_scribble;695 696 memcpy(rec->scsi_opcode, sc->cmnd,697 min_t(int, sc->cmd_len, ZFCP_DBF_SCSI_OPCODE));698 } else {699 rec->scsi_result = ~0;700 rec->scsi_retries = ~0;701 rec->scsi_allowed = ~0;702 rec->scsi_id = sdev->id;703 rec->scsi_lun = (u32)sdev->lun;704 rec->scsi_lun_64_hi = (u32)(sdev->lun >> 32);705 rec->host_scribble = ~0;706 707 memset(rec->scsi_opcode, 0xff, ZFCP_DBF_SCSI_OPCODE);708 }709 710 if (fsf) {711 rec->fsf_req_id = fsf->req_id;712 rec->pl_len = FCP_RESP_WITH_EXT;713 fcp_rsp = &(fsf->qtcb->bottom.io.fcp_rsp.iu);714 /* mandatory parts of FCP_RSP IU in this SCSI record */715 memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT);716 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) {717 fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];718 rec->fcp_rsp_info = fcp_rsp_info->rsp_code;719 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_rsp_len);720 }721 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {722 rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_sns_len);723 }724 /* complete FCP_RSP IU in associated PAYload record725 * but only if there are optional parts726 */727 if (fcp_rsp->resp.fr_flags != 0)728 zfcp_dbf_pl_write(729 dbf, fcp_rsp,730 /* at least one full PAY record731 * but not beyond hardware response field732 */733 min_t(u16, max_t(u16, rec->pl_len,734 ZFCP_DBF_PAY_MAX_REC),735 FSF_FCP_RSP_SIZE),736 "fcp_riu", fsf->req_id);737 }738 739 debug_event(dbf->scsi, level, rec, sizeof(*rec));740 spin_unlock_irqrestore(&dbf->scsi_lock, flags);741}742 743/**744 * zfcp_dbf_scsi_eh() - Trace event for special cases of scsi_eh callbacks.745 * @tag: Identifier for event.746 * @adapter: Pointer to zfcp adapter as context for this event.747 * @scsi_id: SCSI ID/target to indicate scope of task management function (TMF).748 * @ret: Return value of calling function.749 *750 * This SCSI trace variant does not depend on any of:751 * scsi_cmnd, zfcp_fsf_req, scsi_device.752 */753void zfcp_dbf_scsi_eh(char *tag, struct zfcp_adapter *adapter,754 unsigned int scsi_id, int ret)755{756 struct zfcp_dbf *dbf = adapter->dbf;757 struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;758 unsigned long flags;759 static int const level = 1;760 761 if (unlikely(!debug_level_enabled(adapter->dbf->scsi, level)))762 return;763 764 spin_lock_irqsave(&dbf->scsi_lock, flags);765 memset(rec, 0, sizeof(*rec));766 767 memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);768 rec->id = ZFCP_DBF_SCSI_CMND;769 rec->scsi_result = ret; /* re-use field, int is 4 bytes and fits */770 rec->scsi_retries = ~0;771 rec->scsi_allowed = ~0;772 rec->fcp_rsp_info = ~0;773 rec->scsi_id = scsi_id;774 rec->scsi_lun = (u32)ZFCP_DBF_INVALID_LUN;775 rec->scsi_lun_64_hi = (u32)(ZFCP_DBF_INVALID_LUN >> 32);776 rec->host_scribble = ~0;777 memset(rec->scsi_opcode, 0xff, ZFCP_DBF_SCSI_OPCODE);778 779 debug_event(dbf->scsi, level, rec, sizeof(*rec));780 spin_unlock_irqrestore(&dbf->scsi_lock, flags);781}782 783static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size)784{785 struct debug_info *d;786 787 d = debug_register(name, size, 1, rec_size);788 if (!d)789 return NULL;790 791 debug_register_view(d, &debug_hex_ascii_view);792 debug_set_level(d, dbflevel);793 794 return d;795}796 797static void zfcp_dbf_unregister(struct zfcp_dbf *dbf)798{799 if (!dbf)800 return;801 802 debug_unregister(dbf->scsi);803 debug_unregister(dbf->san);804 debug_unregister(dbf->hba);805 debug_unregister(dbf->pay);806 debug_unregister(dbf->rec);807 kfree(dbf);808}809 810/**811 * zfcp_dbf_adapter_register - registers debug feature for an adapter812 * @adapter: pointer to adapter for which debug features should be registered813 * return: -ENOMEM on error, 0 otherwise814 */815int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)816{817 char name[DEBUG_MAX_NAME_LEN];818 struct zfcp_dbf *dbf;819 820 dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);821 if (!dbf)822 return -ENOMEM;823 824 spin_lock_init(&dbf->pay_lock);825 spin_lock_init(&dbf->hba_lock);826 spin_lock_init(&dbf->san_lock);827 spin_lock_init(&dbf->scsi_lock);828 spin_lock_init(&dbf->rec_lock);829 830 /* debug feature area which records recovery activity */831 sprintf(name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));832 dbf->rec = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_rec));833 if (!dbf->rec)834 goto err_out;835 836 /* debug feature area which records HBA (FSF and QDIO) conditions */837 sprintf(name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));838 dbf->hba = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_hba));839 if (!dbf->hba)840 goto err_out;841 842 /* debug feature area which records payload info */843 sprintf(name, "zfcp_%s_pay", dev_name(&adapter->ccw_device->dev));844 dbf->pay = zfcp_dbf_reg(name, dbfsize * 2, sizeof(struct zfcp_dbf_pay));845 if (!dbf->pay)846 goto err_out;847 848 /* debug feature area which records SAN command failures and recovery */849 sprintf(name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));850 dbf->san = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_san));851 if (!dbf->san)852 goto err_out;853 854 /* debug feature area which records SCSI command failures and recovery */855 sprintf(name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));856 dbf->scsi = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_scsi));857 if (!dbf->scsi)858 goto err_out;859 860 adapter->dbf = dbf;861 862 return 0;863err_out:864 zfcp_dbf_unregister(dbf);865 return -ENOMEM;866}867 868/**869 * zfcp_dbf_adapter_unregister - unregisters debug feature for an adapter870 * @adapter: pointer to adapter for which debug features should be unregistered871 */872void zfcp_dbf_adapter_unregister(struct zfcp_adapter *adapter)873{874 struct zfcp_dbf *dbf = adapter->dbf;875 876 adapter->dbf = NULL;877 zfcp_dbf_unregister(dbf);878}879 880