1 /* $NetBSD: rf_states.c,v 1.41 2007/07/29 12:50:22 ad Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Mark Holland, William V. Courtright II, Robby Findler 7 * 8 * Permission to use, copy, modify and distribute this software and 9 * its documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: rf_states.c,v 1.41 2007/07/29 12:50:22 ad Exp $"); 31 32 #include <sys/errno.h> 33 34 #include "rf_archs.h" 35 #include "rf_threadstuff.h" 36 #include "rf_raid.h" 37 #include "rf_dag.h" 38 #include "rf_desc.h" 39 #include "rf_aselect.h" 40 #include "rf_general.h" 41 #include "rf_states.h" 42 #include "rf_dagutils.h" 43 #include "rf_driver.h" 44 #include "rf_engine.h" 45 #include "rf_map.h" 46 #include "rf_etimer.h" 47 #include "rf_kintf.h" 48 49 #ifndef RF_DEBUG_STATES 50 #define RF_DEBUG_STATES 0 51 #endif 52 53 /* prototypes for some of the available states. 54 55 States must: 56 57 - not block. 58 59 - either schedule rf_ContinueRaidAccess as a callback and return 60 RF_TRUE, or complete all of their work and return RF_FALSE. 61 62 - increment desc->state when they have finished their work. 63 */ 64 65 #if RF_DEBUG_STATES 66 static char * 67 StateName(RF_AccessState_t state) 68 { 69 switch (state) { 70 case rf_QuiesceState:return "QuiesceState"; 71 case rf_MapState: 72 return "MapState"; 73 case rf_LockState: 74 return "LockState"; 75 case rf_CreateDAGState: 76 return "CreateDAGState"; 77 case rf_ExecuteDAGState: 78 return "ExecuteDAGState"; 79 case rf_ProcessDAGState: 80 return "ProcessDAGState"; 81 case rf_CleanupState: 82 return "CleanupState"; 83 case rf_LastState: 84 return "LastState"; 85 case rf_IncrAccessesCountState: 86 return "IncrAccessesCountState"; 87 case rf_DecrAccessesCountState: 88 return "DecrAccessesCountState"; 89 default: 90 return "!!! UnnamedState !!!"; 91 } 92 } 93 #endif 94 95 void 96 rf_ContinueRaidAccess(RF_RaidAccessDesc_t *desc) 97 { 98 int suspended = RF_FALSE; 99 int current_state_index = desc->state; 100 RF_AccessState_t current_state = desc->states[current_state_index]; 101 #if RF_DEBUG_STATES 102 int unit = desc->raidPtr->raidid; 103 #endif 104 105 do { 106 107 current_state_index = desc->state; 108 current_state = desc->states[current_state_index]; 109 110 switch (current_state) { 111 112 case rf_QuiesceState: 113 suspended = rf_State_Quiesce(desc); 114 break; 115 case rf_IncrAccessesCountState: 116 suspended = rf_State_IncrAccessCount(desc); 117 break; 118 case rf_MapState: 119 suspended = rf_State_Map(desc); 120 break; 121 case rf_LockState: 122 suspended = rf_State_Lock(desc); 123 break; 124 case rf_CreateDAGState: 125 suspended = rf_State_CreateDAG(desc); 126 break; 127 case rf_ExecuteDAGState: 128 suspended = rf_State_ExecuteDAG(desc); 129 break; 130 case rf_ProcessDAGState: 131 suspended = rf_State_ProcessDAG(desc); 132 break; 133 case rf_CleanupState: 134 suspended = rf_State_Cleanup(desc); 135 break; 136 case rf_DecrAccessesCountState: 137 suspended = rf_State_DecrAccessCount(desc); 138 break; 139 case rf_LastState: 140 suspended = rf_State_LastState(desc); 141 break; 142 } 143 144 /* after this point, we cannot dereference desc since 145 * desc may have been freed. desc is only freed in 146 * LastState, so if we renter this function or loop 147 * back up, desc should be valid. */ 148 149 #if RF_DEBUG_STATES 150 if (rf_printStatesDebug) { 151 printf("raid%d: State: %-24s StateIndex: %3i desc: 0x%ld %s\n", 152 unit, StateName(current_state), 153 current_state_index, (long) desc, 154 suspended ? "callback scheduled" : "looping"); 155 } 156 #endif 157 } while (!suspended && current_state != rf_LastState); 158 159 return; 160 } 161 162 163 void 164 rf_ContinueDagAccess(RF_DagList_t *dagList) 165 { 166 #if RF_ACC_TRACE > 0 167 RF_AccTraceEntry_t *tracerec = &(dagList->desc->tracerec); 168 RF_Etimer_t timer; 169 #endif 170 RF_RaidAccessDesc_t *desc; 171 RF_DagHeader_t *dag_h; 172 int i; 173 174 desc = dagList->desc; 175 176 #if RF_ACC_TRACE > 0 177 timer = tracerec->timer; 178 RF_ETIMER_STOP(timer); 179 RF_ETIMER_EVAL(timer); 180 tracerec->specific.user.exec_us = RF_ETIMER_VAL_US(timer); 181 RF_ETIMER_START(tracerec->timer); 182 #endif 183 184 /* skip to dag which just finished */ 185 dag_h = dagList->dags; 186 for (i = 0; i < dagList->numDagsDone; i++) { 187 dag_h = dag_h->next; 188 } 189 190 /* check to see if retry is required */ 191 if (dag_h->status == rf_rollBackward) { 192 /* when a dag fails, mark desc status as bad and allow 193 * all other dags in the desc to execute to 194 * completion. then, free all dags and start over */ 195 desc->status = 1; /* bad status */ 196 #if 0 197 printf("raid%d: DAG failure: %c addr 0x%lx " 198 "(%ld) nblk 0x%x (%d) buf 0x%lx state %d\n", 199 desc->raidPtr->raidid, desc->type, 200 (long) desc->raidAddress, 201 (long) desc->raidAddress, (int) desc->numBlocks, 202 (int) desc->numBlocks, 203 (unsigned long) (desc->bufPtr), desc->state); 204 #endif 205 } 206 dagList->numDagsDone++; 207 rf_ContinueRaidAccess(desc); 208 } 209 210 int 211 rf_State_LastState(RF_RaidAccessDesc_t *desc) 212 { 213 void (*callbackFunc) (RF_CBParam_t) = desc->callbackFunc; 214 RF_CBParam_t callbackArg; 215 216 callbackArg.p = desc->callbackArg; 217 218 /* 219 * If this is not an async request, wake up the caller 220 */ 221 if (desc->async_flag == 0) 222 wakeup(desc->bp); 223 224 /* 225 * That's all the IO for this one... unbusy the 'disk'. 226 */ 227 228 rf_disk_unbusy(desc); 229 230 /* 231 * Wakeup any requests waiting to go. 232 */ 233 234 RF_LOCK_MUTEX(((RF_Raid_t *) desc->raidPtr)->mutex); 235 ((RF_Raid_t *) desc->raidPtr)->openings++; 236 RF_UNLOCK_MUTEX(((RF_Raid_t *) desc->raidPtr)->mutex); 237 238 wakeup(&(desc->raidPtr->iodone)); 239 240 /* printf("Calling biodone on 0x%x\n",desc->bp); */ 241 biodone(desc->bp); /* access came through ioctl */ 242 243 if (callbackFunc) 244 callbackFunc(callbackArg); 245 rf_FreeRaidAccDesc(desc); 246 247 return RF_FALSE; 248 } 249 250 int 251 rf_State_IncrAccessCount(RF_RaidAccessDesc_t *desc) 252 { 253 RF_Raid_t *raidPtr; 254 255 raidPtr = desc->raidPtr; 256 /* Bummer. We have to do this to be 100% safe w.r.t. the increment 257 * below */ 258 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 259 raidPtr->accs_in_flight++; /* used to detect quiescence */ 260 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 261 262 desc->state++; 263 return RF_FALSE; 264 } 265 266 int 267 rf_State_DecrAccessCount(RF_RaidAccessDesc_t *desc) 268 { 269 RF_Raid_t *raidPtr; 270 271 raidPtr = desc->raidPtr; 272 273 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 274 raidPtr->accs_in_flight--; 275 if (raidPtr->accesses_suspended && raidPtr->accs_in_flight == 0) { 276 rf_SignalQuiescenceLock(raidPtr); 277 } 278 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 279 280 desc->state++; 281 return RF_FALSE; 282 } 283 284 int 285 rf_State_Quiesce(RF_RaidAccessDesc_t *desc) 286 { 287 #if RF_ACC_TRACE > 0 288 RF_AccTraceEntry_t *tracerec = &desc->tracerec; 289 RF_Etimer_t timer; 290 #endif 291 RF_CallbackDesc_t *cb; 292 RF_Raid_t *raidPtr; 293 int suspended = RF_FALSE; 294 int need_cb, used_cb; 295 296 raidPtr = desc->raidPtr; 297 298 #if RF_ACC_TRACE > 0 299 RF_ETIMER_START(timer); 300 RF_ETIMER_START(desc->timer); 301 #endif 302 303 need_cb = 0; 304 used_cb = 0; 305 cb = NULL; 306 307 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 308 /* Do an initial check to see if we might need a callback structure */ 309 if (raidPtr->accesses_suspended) { 310 need_cb = 1; 311 } 312 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 313 314 if (need_cb) { 315 /* create a callback if we might need it... 316 and we likely do. */ 317 cb = rf_AllocCallbackDesc(); 318 } 319 320 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 321 if (raidPtr->accesses_suspended) { 322 cb->callbackFunc = (void (*) (RF_CBParam_t)) rf_ContinueRaidAccess; 323 cb->callbackArg.p = (void *) desc; 324 cb->next = raidPtr->quiesce_wait_list; 325 raidPtr->quiesce_wait_list = cb; 326 suspended = RF_TRUE; 327 used_cb = 1; 328 } 329 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 330 331 if ((need_cb == 1) && (used_cb == 0)) { 332 rf_FreeCallbackDesc(cb); 333 } 334 335 #if RF_ACC_TRACE > 0 336 RF_ETIMER_STOP(timer); 337 RF_ETIMER_EVAL(timer); 338 tracerec->specific.user.suspend_ovhd_us += RF_ETIMER_VAL_US(timer); 339 #endif 340 341 #if RF_DEBUG_QUIESCE 342 if (suspended && rf_quiesceDebug) 343 printf("Stalling access due to quiescence lock\n"); 344 #endif 345 desc->state++; 346 return suspended; 347 } 348 349 int 350 rf_State_Map(RF_RaidAccessDesc_t *desc) 351 { 352 RF_Raid_t *raidPtr = desc->raidPtr; 353 #if RF_ACC_TRACE > 0 354 RF_AccTraceEntry_t *tracerec = &desc->tracerec; 355 RF_Etimer_t timer; 356 357 RF_ETIMER_START(timer); 358 #endif 359 360 if (!(desc->asmap = rf_MapAccess(raidPtr, desc->raidAddress, desc->numBlocks, 361 desc->bufPtr, RF_DONT_REMAP))) 362 RF_PANIC(); 363 364 #if RF_ACC_TRACE > 0 365 RF_ETIMER_STOP(timer); 366 RF_ETIMER_EVAL(timer); 367 tracerec->specific.user.map_us = RF_ETIMER_VAL_US(timer); 368 #endif 369 370 desc->state++; 371 return RF_FALSE; 372 } 373 374 int 375 rf_State_Lock(RF_RaidAccessDesc_t *desc) 376 { 377 #if RF_ACC_TRACE > 0 378 RF_AccTraceEntry_t *tracerec = &desc->tracerec; 379 RF_Etimer_t timer; 380 #endif 381 RF_Raid_t *raidPtr = desc->raidPtr; 382 RF_AccessStripeMapHeader_t *asmh = desc->asmap; 383 RF_AccessStripeMap_t *asm_p; 384 RF_StripeNum_t lastStripeID = -1; 385 int suspended = RF_FALSE; 386 387 #if RF_ACC_TRACE > 0 388 RF_ETIMER_START(timer); 389 #endif 390 391 /* acquire each lock that we don't already hold */ 392 for (asm_p = asmh->stripeMap; asm_p; asm_p = asm_p->next) { 393 RF_ASSERT(RF_IO_IS_R_OR_W(desc->type)); 394 if (!rf_suppressLocksAndLargeWrites && 395 asm_p->parityInfo && 396 !(desc->flags & RF_DAG_SUPPRESS_LOCKS) && 397 !(asm_p->flags & RF_ASM_FLAGS_LOCK_TRIED)) { 398 asm_p->flags |= RF_ASM_FLAGS_LOCK_TRIED; 399 /* locks must be acquired hierarchically */ 400 RF_ASSERT(asm_p->stripeID > lastStripeID); 401 lastStripeID = asm_p->stripeID; 402 403 RF_INIT_LOCK_REQ_DESC(asm_p->lockReqDesc, desc->type, 404 (void (*) (struct buf *)) rf_ContinueRaidAccess, desc, asm_p, 405 raidPtr->Layout.dataSectorsPerStripe); 406 if (rf_AcquireStripeLock(raidPtr->lockTable, asm_p->stripeID, 407 &asm_p->lockReqDesc)) { 408 suspended = RF_TRUE; 409 break; 410 } 411 } 412 if (desc->type == RF_IO_TYPE_WRITE && 413 raidPtr->status == rf_rs_reconstructing) { 414 if (!(asm_p->flags & RF_ASM_FLAGS_FORCE_TRIED)) { 415 int val; 416 417 asm_p->flags |= RF_ASM_FLAGS_FORCE_TRIED; 418 val = rf_ForceOrBlockRecon(raidPtr, asm_p, 419 (void (*) (RF_Raid_t *, void *)) rf_ContinueRaidAccess, desc); 420 if (val == 0) { 421 asm_p->flags |= RF_ASM_FLAGS_RECON_BLOCKED; 422 } else { 423 suspended = RF_TRUE; 424 break; 425 } 426 } else { 427 #if RF_DEBUG_PSS > 0 428 if (rf_pssDebug) { 429 printf("raid%d: skipping force/block because already done, psid %ld\n", 430 desc->raidPtr->raidid, 431 (long) asm_p->stripeID); 432 } 433 #endif 434 } 435 } else { 436 #if RF_DEBUG_PSS > 0 437 if (rf_pssDebug) { 438 printf("raid%d: skipping force/block because not write or not under recon, psid %ld\n", 439 desc->raidPtr->raidid, 440 (long) asm_p->stripeID); 441 } 442 #endif 443 } 444 } 445 #if RF_ACC_TRACE > 0 446 RF_ETIMER_STOP(timer); 447 RF_ETIMER_EVAL(timer); 448 tracerec->specific.user.lock_us += RF_ETIMER_VAL_US(timer); 449 #endif 450 if (suspended) 451 return (RF_TRUE); 452 453 desc->state++; 454 return (RF_FALSE); 455 } 456 /* 457 * the following three states create, execute, and post-process dags 458 * the error recovery unit is a single dag. 459 * by default, SelectAlgorithm creates an array of dags, one per parity stripe 460 * in some tricky cases, multiple dags per stripe are created 461 * - dags within a parity stripe are executed sequentially (arbitrary order) 462 * - dags for distinct parity stripes are executed concurrently 463 * 464 * repeat until all dags complete successfully -or- dag selection fails 465 * 466 * while !done 467 * create dag(s) (SelectAlgorithm) 468 * if dag 469 * execute dag (DispatchDAG) 470 * if dag successful 471 * done (SUCCESS) 472 * else 473 * !done (RETRY - start over with new dags) 474 * else 475 * done (FAIL) 476 */ 477 int 478 rf_State_CreateDAG(RF_RaidAccessDesc_t *desc) 479 { 480 #if RF_ACC_TRACE > 0 481 RF_AccTraceEntry_t *tracerec = &desc->tracerec; 482 RF_Etimer_t timer; 483 #endif 484 RF_DagHeader_t *dag_h; 485 RF_DagList_t *dagList; 486 struct buf *bp; 487 int i, selectStatus; 488 489 /* generate a dag for the access, and fire it off. When the dag 490 * completes, we'll get re-invoked in the next state. */ 491 #if RF_ACC_TRACE > 0 492 RF_ETIMER_START(timer); 493 #endif 494 /* SelectAlgorithm returns one or more dags */ 495 selectStatus = rf_SelectAlgorithm(desc, desc->flags | RF_DAG_SUPPRESS_LOCKS); 496 #if RF_DEBUG_VALIDATE_DAG 497 if (rf_printDAGsDebug) { 498 dagList = desc->dagList; 499 for (i = 0; i < desc->numStripes; i++) { 500 rf_PrintDAGList(dagList.dags); 501 dagList = dagList->next; 502 } 503 } 504 #endif /* RF_DEBUG_VALIDATE_DAG */ 505 #if RF_ACC_TRACE > 0 506 RF_ETIMER_STOP(timer); 507 RF_ETIMER_EVAL(timer); 508 /* update time to create all dags */ 509 tracerec->specific.user.dag_create_us = RF_ETIMER_VAL_US(timer); 510 #endif 511 512 desc->status = 0; /* good status */ 513 514 if (selectStatus || (desc->numRetries > RF_RETRY_THRESHOLD)) { 515 /* failed to create a dag */ 516 /* this happens when there are too many faults or incomplete 517 * dag libraries */ 518 if (selectStatus) { 519 printf("raid%d: failed to create a dag. " 520 "Too many component failures.\n", 521 desc->raidPtr->raidid); 522 } else { 523 printf("raid%d: IO failed after %d retries.\n", 524 desc->raidPtr->raidid, RF_RETRY_THRESHOLD); 525 } 526 527 desc->status = 1; /* bad status */ 528 /* skip straight to rf_State_Cleanup() */ 529 desc->state = rf_CleanupState; 530 bp = (struct buf *)desc->bp; 531 bp->b_error = EIO; 532 } else { 533 /* bind dags to desc */ 534 dagList = desc->dagList; 535 for (i = 0; i < desc->numStripes; i++) { 536 dag_h = dagList->dags; 537 while (dag_h) { 538 dag_h->bp = (struct buf *) desc->bp; 539 #if RF_ACC_TRACE > 0 540 dag_h->tracerec = tracerec; 541 #endif 542 dag_h = dag_h->next; 543 } 544 dagList = dagList->next; 545 } 546 desc->flags |= RF_DAG_DISPATCH_RETURNED; 547 desc->state++; /* next state should be rf_State_ExecuteDAG */ 548 } 549 return RF_FALSE; 550 } 551 552 553 554 /* the access has an list of dagLists, one dagList per parity stripe. 555 * fire the first dag in each parity stripe (dagList). 556 * dags within a stripe (dagList) must be executed sequentially 557 * - this preserves atomic parity update 558 * dags for independents parity groups (stripes) are fired concurrently */ 559 560 int 561 rf_State_ExecuteDAG(RF_RaidAccessDesc_t *desc) 562 { 563 int i; 564 RF_DagHeader_t *dag_h; 565 RF_DagList_t *dagList; 566 567 /* next state is always rf_State_ProcessDAG important to do 568 * this before firing the first dag (it may finish before we 569 * leave this routine) */ 570 desc->state++; 571 572 /* sweep dag array, a stripe at a time, firing the first dag 573 * in each stripe */ 574 dagList = desc->dagList; 575 for (i = 0; i < desc->numStripes; i++) { 576 RF_ASSERT(dagList->numDags > 0); 577 RF_ASSERT(dagList->numDagsDone == 0); 578 RF_ASSERT(dagList->numDagsFired == 0); 579 #if RF_ACC_TRACE > 0 580 RF_ETIMER_START(dagList->tracerec.timer); 581 #endif 582 /* fire first dag in this stripe */ 583 dag_h = dagList->dags; 584 RF_ASSERT(dag_h); 585 dagList->numDagsFired++; 586 rf_DispatchDAG(dag_h, (void (*) (void *)) rf_ContinueDagAccess, dagList); 587 dagList = dagList->next; 588 } 589 590 /* the DAG will always call the callback, even if there was no 591 * blocking, so we are always suspended in this state */ 592 return RF_TRUE; 593 } 594 595 596 597 /* rf_State_ProcessDAG is entered when a dag completes. 598 * first, check to all dags in the access have completed 599 * if not, fire as many dags as possible */ 600 601 int 602 rf_State_ProcessDAG(RF_RaidAccessDesc_t *desc) 603 { 604 RF_AccessStripeMapHeader_t *asmh = desc->asmap; 605 RF_Raid_t *raidPtr = desc->raidPtr; 606 RF_DagHeader_t *dag_h; 607 int i, j, done = RF_TRUE; 608 RF_DagList_t *dagList, *temp; 609 610 /* check to see if this is the last dag */ 611 dagList = desc->dagList; 612 for (i = 0; i < desc->numStripes; i++) { 613 if (dagList->numDags != dagList->numDagsDone) 614 done = RF_FALSE; 615 dagList = dagList->next; 616 } 617 618 if (done) { 619 if (desc->status) { 620 /* a dag failed, retry */ 621 /* free all dags */ 622 dagList = desc->dagList; 623 for (i = 0; i < desc->numStripes; i++) { 624 rf_FreeDAG(dagList->dags); 625 temp = dagList; 626 dagList = dagList->next; 627 rf_FreeDAGList(temp); 628 } 629 desc->dagList = NULL; 630 631 rf_MarkFailuresInASMList(raidPtr, asmh); 632 633 /* note the retry so that we'll bail in 634 rf_State_CreateDAG() once we've retired 635 the IO RF_RETRY_THRESHOLD times */ 636 637 desc->numRetries++; 638 639 /* back up to rf_State_CreateDAG */ 640 desc->state = desc->state - 2; 641 return RF_FALSE; 642 } else { 643 /* move on to rf_State_Cleanup */ 644 desc->state++; 645 } 646 return RF_FALSE; 647 } else { 648 /* more dags to execute */ 649 /* see if any are ready to be fired. if so, fire them */ 650 /* don't fire the initial dag in a list, it's fired in 651 * rf_State_ExecuteDAG */ 652 dagList = desc->dagList; 653 for (i = 0; i < desc->numStripes; i++) { 654 if ((dagList->numDagsDone < dagList->numDags) 655 && (dagList->numDagsDone == dagList->numDagsFired) 656 && (dagList->numDagsFired > 0)) { 657 #if RF_ACC_TRACE > 0 658 RF_ETIMER_START(dagList->tracerec.timer); 659 #endif 660 /* fire next dag in this stripe */ 661 /* first, skip to next dag awaiting execution */ 662 dag_h = dagList->dags; 663 for (j = 0; j < dagList->numDagsDone; j++) 664 dag_h = dag_h->next; 665 dagList->numDagsFired++; 666 rf_DispatchDAG(dag_h, (void (*) (void *)) rf_ContinueDagAccess, 667 dagList); 668 } 669 dagList = dagList->next; 670 } 671 return RF_TRUE; 672 } 673 } 674 /* only make it this far if all dags complete successfully */ 675 int 676 rf_State_Cleanup(RF_RaidAccessDesc_t *desc) 677 { 678 #if RF_ACC_TRACE > 0 679 RF_AccTraceEntry_t *tracerec = &desc->tracerec; 680 RF_Etimer_t timer; 681 #endif 682 RF_AccessStripeMapHeader_t *asmh = desc->asmap; 683 RF_Raid_t *raidPtr = desc->raidPtr; 684 RF_AccessStripeMap_t *asm_p; 685 RF_DagList_t *dagList; 686 int i; 687 688 desc->state++; 689 690 #if RF_ACC_TRACE > 0 691 timer = tracerec->timer; 692 RF_ETIMER_STOP(timer); 693 RF_ETIMER_EVAL(timer); 694 tracerec->specific.user.dag_retry_us = RF_ETIMER_VAL_US(timer); 695 696 /* the RAID I/O is complete. Clean up. */ 697 tracerec->specific.user.dag_retry_us = 0; 698 699 RF_ETIMER_START(timer); 700 #endif 701 /* free all dags */ 702 dagList = desc->dagList; 703 for (i = 0; i < desc->numStripes; i++) { 704 rf_FreeDAG(dagList->dags); 705 dagList = dagList->next; 706 } 707 #if RF_ACC_TRACE > 0 708 RF_ETIMER_STOP(timer); 709 RF_ETIMER_EVAL(timer); 710 tracerec->specific.user.cleanup_us = RF_ETIMER_VAL_US(timer); 711 712 RF_ETIMER_START(timer); 713 #endif 714 for (asm_p = asmh->stripeMap; asm_p; asm_p = asm_p->next) { 715 if (!rf_suppressLocksAndLargeWrites && 716 asm_p->parityInfo && 717 !(desc->flags & RF_DAG_SUPPRESS_LOCKS)) { 718 RF_ASSERT_VALID_LOCKREQ(&asm_p->lockReqDesc); 719 rf_ReleaseStripeLock(raidPtr->lockTable, 720 asm_p->stripeID, 721 &asm_p->lockReqDesc); 722 } 723 if (asm_p->flags & RF_ASM_FLAGS_RECON_BLOCKED) { 724 rf_UnblockRecon(raidPtr, asm_p); 725 } 726 } 727 #if RF_ACC_TRACE > 0 728 RF_ETIMER_STOP(timer); 729 RF_ETIMER_EVAL(timer); 730 tracerec->specific.user.lock_us += RF_ETIMER_VAL_US(timer); 731 732 RF_ETIMER_START(timer); 733 #endif 734 rf_FreeAccessStripeMap(asmh); 735 #if RF_ACC_TRACE > 0 736 RF_ETIMER_STOP(timer); 737 RF_ETIMER_EVAL(timer); 738 tracerec->specific.user.cleanup_us += RF_ETIMER_VAL_US(timer); 739 740 RF_ETIMER_STOP(desc->timer); 741 RF_ETIMER_EVAL(desc->timer); 742 743 timer = desc->tracerec.tot_timer; 744 RF_ETIMER_STOP(timer); 745 RF_ETIMER_EVAL(timer); 746 desc->tracerec.total_us = RF_ETIMER_VAL_US(timer); 747 748 rf_LogTraceRec(raidPtr, tracerec); 749 #endif 750 desc->flags |= RF_DAG_ACCESS_COMPLETE; 751 752 return RF_FALSE; 753 } 754