1 /* 2 * zfcp device driver 3 * debug feature declarations 4 * 5 * Copyright IBM Corp. 2008, 2017 6 */ 7 8 #ifndef ZFCP_DBF_H 9 #define ZFCP_DBF_H 10 11 #include <scsi/fc/fc_fcp.h> 12 #include "zfcp_ext.h" 13 #include "zfcp_fsf.h" 14 #include "zfcp_def.h" 15 16 #define ZFCP_DBF_TAG_LEN 7 17 18 #define ZFCP_DBF_INVALID_LUN 0xFFFFFFFFFFFFFFFFull 19 20 enum zfcp_dbf_pseudo_erp_act_type { 21 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD = 0xff, 22 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL = 0xfe, 23 }; 24 25 /** 26 * struct zfcp_dbf_rec_trigger - trace record for triggered recovery action 27 * @ready: number of ready recovery actions 28 * @running: number of running recovery actions 29 * @want: wanted recovery action 30 * @need: needed recovery action 31 */ 32 struct zfcp_dbf_rec_trigger { 33 u32 ready; 34 u32 running; 35 u8 want; 36 u8 need; 37 } __packed; 38 39 /** 40 * struct zfcp_dbf_rec_running - trace record for running recovery 41 * @fsf_req_id: request id for fsf requests 42 * @rec_status: status of the fsf request 43 * @rec_step: current step of the recovery action 44 * rec_count: recovery counter 45 */ 46 struct zfcp_dbf_rec_running { 47 u64 fsf_req_id; 48 u32 rec_status; 49 u16 rec_step; 50 u8 rec_action; 51 u8 rec_count; 52 } __packed; 53 54 /** 55 * enum zfcp_dbf_rec_id - recovery trace record id 56 * @ZFCP_DBF_REC_TRIG: triggered recovery identifier 57 * @ZFCP_DBF_REC_RUN: running recovery identifier 58 */ 59 enum zfcp_dbf_rec_id { 60 ZFCP_DBF_REC_TRIG = 1, 61 ZFCP_DBF_REC_RUN = 2, 62 }; 63 64 /** 65 * struct zfcp_dbf_rec - trace record for error recovery actions 66 * @id: unique number of recovery record type 67 * @tag: identifier string specifying the location of initiation 68 * @lun: logical unit number 69 * @wwpn: word wide port number 70 * @d_id: destination ID 71 * @adapter_status: current status of the adapter 72 * @port_status: current status of the port 73 * @lun_status: current status of the lun 74 * @u.trig: structure zfcp_dbf_rec_trigger 75 * @u.run: structure zfcp_dbf_rec_running 76 */ 77 struct zfcp_dbf_rec { 78 u8 id; 79 char tag[ZFCP_DBF_TAG_LEN]; 80 u64 lun; 81 u64 wwpn; 82 u32 d_id; 83 u32 adapter_status; 84 u32 port_status; 85 u32 lun_status; 86 union { 87 struct zfcp_dbf_rec_trigger trig; 88 struct zfcp_dbf_rec_running run; 89 } u; 90 } __packed; 91 92 /** 93 * enum zfcp_dbf_san_id - SAN trace record identifier 94 * @ZFCP_DBF_SAN_REQ: request trace record id 95 * @ZFCP_DBF_SAN_RES: response trace record id 96 * @ZFCP_DBF_SAN_ELS: extended link service record id 97 */ 98 enum zfcp_dbf_san_id { 99 ZFCP_DBF_SAN_REQ = 1, 100 ZFCP_DBF_SAN_RES = 2, 101 ZFCP_DBF_SAN_ELS = 3, 102 }; 103 104 /** struct zfcp_dbf_san - trace record for SAN requests and responses 105 * @id: unique number of recovery record type 106 * @tag: identifier string specifying the location of initiation 107 * @fsf_req_id: request id for fsf requests 108 * @payload: unformatted information related to request/response 109 * @d_id: destination id 110 */ 111 struct zfcp_dbf_san { 112 u8 id; 113 char tag[ZFCP_DBF_TAG_LEN]; 114 u64 fsf_req_id; 115 u32 d_id; 116 #define ZFCP_DBF_SAN_MAX_PAYLOAD (FC_CT_HDR_LEN + 32) 117 char payload[ZFCP_DBF_SAN_MAX_PAYLOAD]; 118 u16 pl_len; 119 } __packed; 120 121 /** 122 * struct zfcp_dbf_hba_res - trace record for hba responses 123 * @req_issued: timestamp when request was issued 124 * @prot_status: protocol status 125 * @prot_status_qual: protocol status qualifier 126 * @fsf_status: fsf status 127 * @fsf_status_qual: fsf status qualifier 128 */ 129 struct zfcp_dbf_hba_res { 130 u64 req_issued; 131 u32 prot_status; 132 u8 prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE]; 133 u32 fsf_status; 134 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; 135 u32 port_handle; 136 u32 lun_handle; 137 } __packed; 138 139 /** 140 * struct zfcp_dbf_hba_uss - trace record for unsolicited status 141 * @status_type: type of unsolicited status 142 * @status_subtype: subtype of unsolicited status 143 * @d_id: destination ID 144 * @lun: logical unit number 145 * @queue_designator: queue designator 146 */ 147 struct zfcp_dbf_hba_uss { 148 u32 status_type; 149 u32 status_subtype; 150 u32 d_id; 151 u64 lun; 152 u64 queue_designator; 153 } __packed; 154 155 /** 156 * enum zfcp_dbf_hba_id - HBA trace record identifier 157 * @ZFCP_DBF_HBA_RES: response trace record 158 * @ZFCP_DBF_HBA_USS: unsolicited status trace record 159 * @ZFCP_DBF_HBA_BIT: bit error trace record 160 */ 161 enum zfcp_dbf_hba_id { 162 ZFCP_DBF_HBA_RES = 1, 163 ZFCP_DBF_HBA_USS = 2, 164 ZFCP_DBF_HBA_BIT = 3, 165 ZFCP_DBF_HBA_BASIC = 4, 166 }; 167 168 /** 169 * struct zfcp_dbf_hba - common trace record for HBA records 170 * @id: unique number of recovery record type 171 * @tag: identifier string specifying the location of initiation 172 * @fsf_req_id: request id for fsf requests 173 * @fsf_req_status: status of fsf request 174 * @fsf_cmd: fsf command 175 * @fsf_seq_no: fsf sequence number 176 * @pl_len: length of payload stored as zfcp_dbf_pay 177 * @u: record type specific data 178 */ 179 struct zfcp_dbf_hba { 180 u8 id; 181 char tag[ZFCP_DBF_TAG_LEN]; 182 u64 fsf_req_id; 183 u32 fsf_req_status; 184 u32 fsf_cmd; 185 u32 fsf_seq_no; 186 u16 pl_len; 187 union { 188 struct zfcp_dbf_hba_res res; 189 struct zfcp_dbf_hba_uss uss; 190 struct fsf_bit_error_payload be; 191 } u; 192 } __packed; 193 194 /** 195 * enum zfcp_dbf_scsi_id - scsi trace record identifier 196 * @ZFCP_DBF_SCSI_CMND: scsi command trace record 197 */ 198 enum zfcp_dbf_scsi_id { 199 ZFCP_DBF_SCSI_CMND = 1, 200 }; 201 202 /** 203 * struct zfcp_dbf_scsi - common trace record for SCSI records 204 * @id: unique number of recovery record type 205 * @tag: identifier string specifying the location of initiation 206 * @scsi_id: scsi device id 207 * @scsi_lun: scsi device logical unit number, low part of 64 bit, old 32 bit 208 * @scsi_result: scsi result 209 * @scsi_retries: current retry number of scsi request 210 * @scsi_allowed: allowed retries 211 * @fcp_rsp_info: FCP response info code 212 * @scsi_opcode: scsi opcode 213 * @fsf_req_id: request id of fsf request 214 * @host_scribble: LLD specific data attached to SCSI request 215 * @pl_len: length of payload stored as zfcp_dbf_pay 216 * @fcp_rsp: response for FCP request 217 * @scsi_lun_64_hi: scsi device logical unit number, high part of 64 bit 218 */ 219 struct zfcp_dbf_scsi { 220 u8 id; 221 char tag[ZFCP_DBF_TAG_LEN]; 222 u32 scsi_id; 223 u32 scsi_lun; 224 u32 scsi_result; 225 u8 scsi_retries; 226 u8 scsi_allowed; 227 u8 fcp_rsp_info; 228 #define ZFCP_DBF_SCSI_OPCODE 16 229 u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE]; 230 u64 fsf_req_id; 231 u64 host_scribble; 232 u16 pl_len; 233 struct fcp_resp_with_ext fcp_rsp; 234 u32 scsi_lun_64_hi; 235 } __packed; 236 237 /** 238 * struct zfcp_dbf_pay - trace record for unformatted payload information 239 * @area: area this record is originated from 240 * @counter: ascending record number 241 * @fsf_req_id: request id of fsf request 242 * @data: unformatted data 243 */ 244 struct zfcp_dbf_pay { 245 u8 counter; 246 char area[ZFCP_DBF_TAG_LEN]; 247 u64 fsf_req_id; 248 #define ZFCP_DBF_PAY_MAX_REC 0x100 249 char data[ZFCP_DBF_PAY_MAX_REC]; 250 } __packed; 251 252 /** 253 * struct zfcp_dbf - main dbf trace structure 254 * @pay: reference to payload trace area 255 * @rec: reference to recovery trace area 256 * @hba: reference to hba trace area 257 * @san: reference to san trace area 258 * @scsi: reference to scsi trace area 259 * @pay_lock: lock protecting payload trace buffer 260 * @rec_lock: lock protecting recovery trace buffer 261 * @hba_lock: lock protecting hba trace buffer 262 * @san_lock: lock protecting san trace buffer 263 * @scsi_lock: lock protecting scsi trace buffer 264 * @pay_buf: pre-allocated buffer for payload 265 * @rec_buf: pre-allocated buffer for recovery 266 * @hba_buf: pre-allocated buffer for hba 267 * @san_buf: pre-allocated buffer for san 268 * @scsi_buf: pre-allocated buffer for scsi 269 */ 270 struct zfcp_dbf { 271 debug_info_t *pay; 272 debug_info_t *rec; 273 debug_info_t *hba; 274 debug_info_t *san; 275 debug_info_t *scsi; 276 spinlock_t pay_lock; 277 spinlock_t rec_lock; 278 spinlock_t hba_lock; 279 spinlock_t san_lock; 280 spinlock_t scsi_lock; 281 struct zfcp_dbf_pay pay_buf; 282 struct zfcp_dbf_rec rec_buf; 283 struct zfcp_dbf_hba hba_buf; 284 struct zfcp_dbf_san san_buf; 285 struct zfcp_dbf_scsi scsi_buf; 286 }; 287 288 /** 289 * zfcp_dbf_hba_fsf_resp_suppress - true if we should not trace by default 290 * @req: request that has been completed 291 * 292 * Returns true if FCP response with only benign residual under count. 293 */ 294 static inline 295 bool zfcp_dbf_hba_fsf_resp_suppress(struct zfcp_fsf_req *req) 296 { 297 struct fsf_qtcb *qtcb = req->qtcb; 298 u32 fsf_stat = qtcb->header.fsf_status; 299 struct fcp_resp *fcp_rsp; 300 u8 rsp_flags, fr_status; 301 302 if (qtcb->prefix.qtcb_type != FSF_IO_COMMAND) 303 return false; /* not an FCP response */ 304 fcp_rsp = &qtcb->bottom.io.fcp_rsp.iu.resp; 305 rsp_flags = fcp_rsp->fr_flags; 306 fr_status = fcp_rsp->fr_status; 307 return (fsf_stat == FSF_FCP_RSP_AVAILABLE) && 308 (rsp_flags == FCP_RESID_UNDER) && 309 (fr_status == SAM_STAT_GOOD); 310 } 311 312 static inline 313 void zfcp_dbf_hba_fsf_resp(char *tag, int level, struct zfcp_fsf_req *req) 314 { 315 if (debug_level_enabled(req->adapter->dbf->hba, level)) 316 zfcp_dbf_hba_fsf_res(tag, level, req); 317 } 318 319 /** 320 * zfcp_dbf_hba_fsf_response - trace event for request completion 321 * @req: request that has been completed 322 */ 323 static inline 324 void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req) 325 { 326 struct fsf_qtcb *qtcb = req->qtcb; 327 328 if (unlikely(req->status & (ZFCP_STATUS_FSFREQ_DISMISSED | 329 ZFCP_STATUS_FSFREQ_ERROR))) { 330 zfcp_dbf_hba_fsf_resp("fs_rerr", 3, req); 331 332 } else if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) && 333 (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { 334 zfcp_dbf_hba_fsf_resp("fs_perr", 1, req); 335 336 } else if (qtcb->header.fsf_status != FSF_GOOD) { 337 zfcp_dbf_hba_fsf_resp("fs_ferr", 338 zfcp_dbf_hba_fsf_resp_suppress(req) 339 ? 5 : 1, req); 340 341 } else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) || 342 (req->fsf_command == FSF_QTCB_OPEN_LUN)) { 343 zfcp_dbf_hba_fsf_resp("fs_open", 4, req); 344 345 } else if (qtcb->header.log_length) { 346 zfcp_dbf_hba_fsf_resp("fs_qtcb", 5, req); 347 348 } else { 349 zfcp_dbf_hba_fsf_resp("fs_norm", 6, req); 350 } 351 } 352 353 static inline 354 void _zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *scmd, 355 struct zfcp_fsf_req *req) 356 { 357 struct zfcp_adapter *adapter = (struct zfcp_adapter *) 358 scmd->device->host->hostdata[0]; 359 360 if (debug_level_enabled(adapter->dbf->scsi, level)) 361 zfcp_dbf_scsi(tag, level, scmd, req); 362 } 363 364 /** 365 * zfcp_dbf_scsi_result - trace event for SCSI command completion 366 * @scmd: SCSI command pointer 367 * @req: FSF request used to issue SCSI command 368 */ 369 static inline 370 void zfcp_dbf_scsi_result(struct scsi_cmnd *scmd, struct zfcp_fsf_req *req) 371 { 372 if (scmd->result != 0) 373 _zfcp_dbf_scsi("rsl_err", 3, scmd, req); 374 else if (scmd->retries > 0) 375 _zfcp_dbf_scsi("rsl_ret", 4, scmd, req); 376 else 377 _zfcp_dbf_scsi("rsl_nor", 6, scmd, req); 378 } 379 380 /** 381 * zfcp_dbf_scsi_fail_send - trace event for failure to send SCSI command 382 * @scmd: SCSI command pointer 383 */ 384 static inline 385 void zfcp_dbf_scsi_fail_send(struct scsi_cmnd *scmd) 386 { 387 _zfcp_dbf_scsi("rsl_fai", 4, scmd, NULL); 388 } 389 390 /** 391 * zfcp_dbf_scsi_abort - trace event for SCSI command abort 392 * @tag: tag indicating success or failure of abort operation 393 * @scmd: SCSI command to be aborted 394 * @fsf_req: request containing abort (might be NULL) 395 */ 396 static inline 397 void zfcp_dbf_scsi_abort(char *tag, struct scsi_cmnd *scmd, 398 struct zfcp_fsf_req *fsf_req) 399 { 400 _zfcp_dbf_scsi(tag, 1, scmd, fsf_req); 401 } 402 403 /** 404 * zfcp_dbf_scsi_devreset - trace event for Logical Unit or Target Reset 405 * @tag: tag indicating success or failure of reset operation 406 * @scmnd: SCSI command which caused this error recovery 407 * @flag: indicates type of reset (Target Reset, Logical Unit Reset) 408 */ 409 static inline 410 void zfcp_dbf_scsi_devreset(char *tag, struct scsi_cmnd *scmnd, u8 flag, 411 struct zfcp_fsf_req *fsf_req) 412 { 413 char tmp_tag[ZFCP_DBF_TAG_LEN]; 414 415 if (flag == FCP_TMF_TGT_RESET) 416 memcpy(tmp_tag, "tr_", 3); 417 else 418 memcpy(tmp_tag, "lr_", 3); 419 420 memcpy(&tmp_tag[3], tag, 4); 421 _zfcp_dbf_scsi(tmp_tag, 1, scmnd, fsf_req); 422 } 423 424 /** 425 * zfcp_dbf_scsi_nullcmnd() - trace NULLify of SCSI command in dev/tgt-reset. 426 * @scmnd: SCSI command that was NULLified. 427 * @fsf_req: request that owned @scmnd. 428 */ 429 static inline void zfcp_dbf_scsi_nullcmnd(struct scsi_cmnd *scmnd, 430 struct zfcp_fsf_req *fsf_req) 431 { 432 _zfcp_dbf_scsi("scfc__1", 3, scmnd, fsf_req); 433 } 434 435 #endif /* ZFCP_DBF_H */ 436