1 /* $NetBSD: rf_driver.c,v 1.34 2000/03/07 02:28:05 oster Exp $ */ 2 /*- 3 * Copyright (c) 1999 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Greg Oster 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1995 Carnegie-Mellon University. 40 * All rights reserved. 41 * 42 * Author: Mark Holland, Khalil Amiri, Claudson Bornstein, William V. Courtright II, 43 * Robby Findler, Daniel Stodolsky, Rachad Youssef, Jim Zelenka 44 * 45 * Permission to use, copy, modify and distribute this software and 46 * its documentation is hereby granted, provided that both the copyright 47 * notice and this permission notice appear in all copies of the 48 * software, derivative works or modified versions, and any portions 49 * thereof, and that both notices appear in supporting documentation. 50 * 51 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 52 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 53 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 54 * 55 * Carnegie Mellon requests users of this software to return to 56 * 57 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 58 * School of Computer Science 59 * Carnegie Mellon University 60 * Pittsburgh PA 15213-3890 61 * 62 * any improvements or extensions that they make and grant Carnegie the 63 * rights to redistribute these changes. 64 */ 65 66 /****************************************************************************** 67 * 68 * rf_driver.c -- main setup, teardown, and access routines for the RAID driver 69 * 70 * all routines are prefixed with rf_ (raidframe), to avoid conficts. 71 * 72 ******************************************************************************/ 73 74 75 #include <sys/types.h> 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/ioctl.h> 79 #include <sys/fcntl.h> 80 #include <sys/vnode.h> 81 82 83 #include "rf_archs.h" 84 #include "rf_threadstuff.h" 85 86 #include <sys/errno.h> 87 88 #include "rf_raid.h" 89 #include "rf_dag.h" 90 #include "rf_aselect.h" 91 #include "rf_diskqueue.h" 92 #include "rf_parityscan.h" 93 #include "rf_alloclist.h" 94 #include "rf_dagutils.h" 95 #include "rf_utils.h" 96 #include "rf_etimer.h" 97 #include "rf_acctrace.h" 98 #include "rf_configure.h" 99 #include "rf_general.h" 100 #include "rf_desc.h" 101 #include "rf_states.h" 102 #include "rf_freelist.h" 103 #include "rf_decluster.h" 104 #include "rf_map.h" 105 #include "rf_revent.h" 106 #include "rf_callback.h" 107 #include "rf_engine.h" 108 #include "rf_memchunk.h" 109 #include "rf_mcpair.h" 110 #include "rf_nwayxor.h" 111 #include "rf_debugprint.h" 112 #include "rf_copyback.h" 113 #include "rf_driver.h" 114 #include "rf_options.h" 115 #include "rf_shutdown.h" 116 #include "rf_kintf.h" 117 118 #include <sys/buf.h> 119 120 /* rad == RF_RaidAccessDesc_t */ 121 static RF_FreeList_t *rf_rad_freelist; 122 #define RF_MAX_FREE_RAD 128 123 #define RF_RAD_INC 16 124 #define RF_RAD_INITIAL 32 125 126 /* debug variables */ 127 char rf_panicbuf[2048]; /* a buffer to hold an error msg when we panic */ 128 129 /* main configuration routines */ 130 static int raidframe_booted = 0; 131 132 static void rf_ConfigureDebug(RF_Config_t * cfgPtr); 133 static void set_debug_option(char *name, long val); 134 static void rf_UnconfigureArray(void); 135 static int init_rad(RF_RaidAccessDesc_t *); 136 static void clean_rad(RF_RaidAccessDesc_t *); 137 static void rf_ShutdownRDFreeList(void *); 138 static int rf_ConfigureRDFreeList(RF_ShutdownList_t **); 139 140 RF_DECLARE_MUTEX(rf_printf_mutex) /* debug only: avoids interleaved 141 * printfs by different stripes */ 142 143 #define SIGNAL_QUIESCENT_COND(_raid_) wakeup(&((_raid_)->accesses_suspended)) 144 #define WAIT_FOR_QUIESCENCE(_raid_) \ 145 tsleep(&((_raid_)->accesses_suspended),PRIBIO,"raidframe quiesce", 0); 146 147 #define IO_BUF_ERR(bp, err) { \ 148 bp->b_flags |= B_ERROR; \ 149 bp->b_resid = bp->b_bcount; \ 150 bp->b_error = err; \ 151 biodone(bp); \ 152 } 153 154 static int configureCount = 0; /* number of active configurations */ 155 static int isconfigged = 0; /* is basic raidframe (non per-array) 156 * stuff configged */ 157 RF_DECLARE_STATIC_MUTEX(configureMutex) /* used to lock the configuration 158 * stuff */ 159 static RF_ShutdownList_t *globalShutdown; /* non array-specific 160 * stuff */ 161 162 static int rf_ConfigureRDFreeList(RF_ShutdownList_t ** listp); 163 164 /* called at system boot time */ 165 int 166 rf_BootRaidframe() 167 { 168 int rc; 169 170 if (raidframe_booted) 171 return (EBUSY); 172 raidframe_booted = 1; 173 174 rc = rf_mutex_init(&configureMutex); 175 if (rc) { 176 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, 177 __LINE__, rc); 178 RF_PANIC(); 179 } 180 configureCount = 0; 181 isconfigged = 0; 182 globalShutdown = NULL; 183 return (0); 184 } 185 /* 186 * This function is really just for debugging user-level stuff: it 187 * frees up all memory, other RAIDframe resources which might otherwise 188 * be kept around. This is used with systems like "sentinel" to detect 189 * memory leaks. 190 */ 191 int 192 rf_UnbootRaidframe() 193 { 194 int rc; 195 196 RF_LOCK_MUTEX(configureMutex); 197 if (configureCount) { 198 RF_UNLOCK_MUTEX(configureMutex); 199 return (EBUSY); 200 } 201 raidframe_booted = 0; 202 RF_UNLOCK_MUTEX(configureMutex); 203 rc = rf_mutex_destroy(&configureMutex); 204 if (rc) { 205 RF_ERRORMSG3("Unable to destroy mutex file %s line %d rc=%d\n", __FILE__, 206 __LINE__, rc); 207 RF_PANIC(); 208 } 209 return (0); 210 } 211 /* 212 * Called whenever an array is shutdown 213 */ 214 static void 215 rf_UnconfigureArray() 216 { 217 int rc; 218 219 RF_LOCK_MUTEX(configureMutex); 220 if (--configureCount == 0) { /* if no active configurations, shut 221 * everything down */ 222 isconfigged = 0; 223 224 rc = rf_ShutdownList(&globalShutdown); 225 if (rc) { 226 RF_ERRORMSG1("RAIDFRAME: unable to do global shutdown, rc=%d\n", rc); 227 } 228 229 /* 230 * We must wait until now, because the AllocList module 231 * uses the DebugMem module. 232 */ 233 if (rf_memDebug) 234 rf_print_unfreed(); 235 } 236 RF_UNLOCK_MUTEX(configureMutex); 237 } 238 239 /* 240 * Called to shut down an array. 241 */ 242 int 243 rf_Shutdown(raidPtr) 244 RF_Raid_t *raidPtr; 245 { 246 247 if (!raidPtr->valid) { 248 RF_ERRORMSG("Attempt to shut down unconfigured RAIDframe driver. Aborting shutdown\n"); 249 return (EINVAL); 250 } 251 /* 252 * wait for outstanding IOs to land 253 * As described in rf_raid.h, we use the rad_freelist lock 254 * to protect the per-array info about outstanding descs 255 * since we need to do freelist locking anyway, and this 256 * cuts down on the amount of serialization we've got going 257 * on. 258 */ 259 RF_FREELIST_DO_LOCK(rf_rad_freelist); 260 if (raidPtr->waitShutdown) { 261 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 262 return (EBUSY); 263 } 264 raidPtr->waitShutdown = 1; 265 while (raidPtr->nAccOutstanding) { 266 RF_WAIT_COND(raidPtr->outstandingCond, RF_FREELIST_MUTEX_OF(rf_rad_freelist)); 267 } 268 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 269 270 raidPtr->valid = 0; 271 272 rf_final_update_component_labels(raidPtr); 273 274 rf_UnconfigureVnodes(raidPtr); 275 276 rf_ShutdownList(&raidPtr->shutdownList); 277 278 rf_UnconfigureArray(); 279 280 return (0); 281 } 282 283 284 #define DO_INIT_CONFIGURE(f) { \ 285 rc = f (&globalShutdown); \ 286 if (rc) { \ 287 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 288 rf_ShutdownList(&globalShutdown); \ 289 configureCount--; \ 290 RF_UNLOCK_MUTEX(configureMutex); \ 291 return(rc); \ 292 } \ 293 } 294 295 #define DO_RAID_FAIL() { \ 296 rf_UnconfigureVnodes(raidPtr); \ 297 rf_ShutdownList(&raidPtr->shutdownList); \ 298 rf_UnconfigureArray(); \ 299 } 300 301 #define DO_RAID_INIT_CONFIGURE(f) { \ 302 rc = f (&raidPtr->shutdownList, raidPtr, cfgPtr); \ 303 if (rc) { \ 304 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 305 DO_RAID_FAIL(); \ 306 return(rc); \ 307 } \ 308 } 309 310 #define DO_RAID_MUTEX(_m_) { \ 311 rc = rf_create_managed_mutex(&raidPtr->shutdownList, (_m_)); \ 312 if (rc) { \ 313 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", \ 314 __FILE__, __LINE__, rc); \ 315 DO_RAID_FAIL(); \ 316 return(rc); \ 317 } \ 318 } 319 320 #define DO_RAID_COND(_c_) { \ 321 rc = rf_create_managed_cond(&raidPtr->shutdownList, (_c_)); \ 322 if (rc) { \ 323 RF_ERRORMSG3("Unable to init cond file %s line %d rc=%d\n", \ 324 __FILE__, __LINE__, rc); \ 325 DO_RAID_FAIL(); \ 326 return(rc); \ 327 } \ 328 } 329 330 int 331 rf_Configure(raidPtr, cfgPtr, ac) 332 RF_Raid_t *raidPtr; 333 RF_Config_t *cfgPtr; 334 RF_AutoConfig_t *ac; 335 { 336 RF_RowCol_t row, col; 337 int i, rc; 338 339 /* XXX This check can probably be removed now, since 340 RAIDFRAME_CONFIGURRE now checks to make sure that the 341 RAID set is not already valid 342 */ 343 if (raidPtr->valid) { 344 RF_ERRORMSG("RAIDframe configuration not shut down. Aborting configure.\n"); 345 return (EINVAL); 346 } 347 RF_LOCK_MUTEX(configureMutex); 348 configureCount++; 349 if (isconfigged == 0) { 350 rc = rf_create_managed_mutex(&globalShutdown, &rf_printf_mutex); 351 if (rc) { 352 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, 353 __LINE__, rc); 354 rf_ShutdownList(&globalShutdown); 355 return (rc); 356 } 357 /* initialize globals */ 358 printf("RAIDFRAME: protectedSectors is %ld\n", 359 rf_protectedSectors); 360 361 rf_clear_debug_print_buffer(); 362 363 DO_INIT_CONFIGURE(rf_ConfigureAllocList); 364 365 /* 366 * Yes, this does make debugging general to the whole 367 * system instead of being array specific. Bummer, drag. 368 */ 369 rf_ConfigureDebug(cfgPtr); 370 DO_INIT_CONFIGURE(rf_ConfigureDebugMem); 371 DO_INIT_CONFIGURE(rf_ConfigureAccessTrace); 372 DO_INIT_CONFIGURE(rf_ConfigureMapModule); 373 DO_INIT_CONFIGURE(rf_ConfigureReconEvent); 374 DO_INIT_CONFIGURE(rf_ConfigureCallback); 375 DO_INIT_CONFIGURE(rf_ConfigureMemChunk); 376 DO_INIT_CONFIGURE(rf_ConfigureRDFreeList); 377 DO_INIT_CONFIGURE(rf_ConfigureNWayXor); 378 DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList); 379 DO_INIT_CONFIGURE(rf_ConfigureMCPair); 380 DO_INIT_CONFIGURE(rf_ConfigureDAGs); 381 DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs); 382 DO_INIT_CONFIGURE(rf_ConfigureDebugPrint); 383 DO_INIT_CONFIGURE(rf_ConfigureReconstruction); 384 DO_INIT_CONFIGURE(rf_ConfigureCopyback); 385 DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem); 386 isconfigged = 1; 387 } 388 RF_UNLOCK_MUTEX(configureMutex); 389 390 DO_RAID_MUTEX(&raidPtr->mutex); 391 /* set up the cleanup list. Do this after ConfigureDebug so that 392 * value of memDebug will be set */ 393 394 rf_MakeAllocList(raidPtr->cleanupList); 395 if (raidPtr->cleanupList == NULL) { 396 DO_RAID_FAIL(); 397 return (ENOMEM); 398 } 399 rc = rf_ShutdownCreate(&raidPtr->shutdownList, 400 (void (*) (void *)) rf_FreeAllocList, 401 raidPtr->cleanupList); 402 if (rc) { 403 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", 404 __FILE__, __LINE__, rc); 405 DO_RAID_FAIL(); 406 return (rc); 407 } 408 raidPtr->numRow = cfgPtr->numRow; 409 raidPtr->numCol = cfgPtr->numCol; 410 raidPtr->numSpare = cfgPtr->numSpare; 411 412 /* XXX we don't even pretend to support more than one row in the 413 * kernel... */ 414 if (raidPtr->numRow != 1) { 415 RF_ERRORMSG("Only one row supported in kernel.\n"); 416 DO_RAID_FAIL(); 417 return (EINVAL); 418 } 419 RF_CallocAndAdd(raidPtr->status, raidPtr->numRow, sizeof(RF_RowStatus_t), 420 (RF_RowStatus_t *), raidPtr->cleanupList); 421 if (raidPtr->status == NULL) { 422 DO_RAID_FAIL(); 423 return (ENOMEM); 424 } 425 RF_CallocAndAdd(raidPtr->reconControl, raidPtr->numRow, 426 sizeof(RF_ReconCtrl_t *), (RF_ReconCtrl_t **), raidPtr->cleanupList); 427 if (raidPtr->reconControl == NULL) { 428 DO_RAID_FAIL(); 429 return (ENOMEM); 430 } 431 for (i = 0; i < raidPtr->numRow; i++) { 432 raidPtr->status[i] = rf_rs_optimal; 433 raidPtr->reconControl[i] = NULL; 434 } 435 436 DO_RAID_INIT_CONFIGURE(rf_ConfigureEngine); 437 DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLocks); 438 439 DO_RAID_COND(&raidPtr->outstandingCond); 440 441 raidPtr->nAccOutstanding = 0; 442 raidPtr->waitShutdown = 0; 443 444 DO_RAID_MUTEX(&raidPtr->access_suspend_mutex); 445 DO_RAID_COND(&raidPtr->quiescent_cond); 446 447 DO_RAID_COND(&raidPtr->waitForReconCond); 448 449 DO_RAID_MUTEX(&raidPtr->recon_done_proc_mutex); 450 451 if (ac!=NULL) { 452 /* We have an AutoConfig structure.. Don't do the 453 normal disk configuration... call the auto config 454 stuff */ 455 rf_AutoConfigureDisks(raidPtr, cfgPtr, ac); 456 } else { 457 DO_RAID_INIT_CONFIGURE(rf_ConfigureDisks); 458 DO_RAID_INIT_CONFIGURE(rf_ConfigureSpareDisks); 459 } 460 /* do this after ConfigureDisks & ConfigureSpareDisks to be sure dev 461 * no. is set */ 462 DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueues); 463 464 DO_RAID_INIT_CONFIGURE(rf_ConfigureLayout); 465 466 DO_RAID_INIT_CONFIGURE(rf_ConfigurePSStatus); 467 468 for (row = 0; row < raidPtr->numRow; row++) { 469 for (col = 0; col < raidPtr->numCol; col++) { 470 /* 471 * XXX better distribution 472 */ 473 raidPtr->hist_diskreq[row][col] = 0; 474 } 475 } 476 477 raidPtr->numNewFailures = 0; 478 raidPtr->copyback_in_progress = 0; 479 raidPtr->parity_rewrite_in_progress = 0; 480 raidPtr->recon_in_progress = 0; 481 raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs; 482 483 /* autoconfigure and root_partition will actually get filled in 484 after the config is done */ 485 raidPtr->autoconfigure = 0; 486 raidPtr->root_partition = 0; 487 raidPtr->last_unit = raidPtr->raidid; 488 raidPtr->config_order = 0; 489 490 if (rf_keepAccTotals) { 491 raidPtr->keep_acc_totals = 1; 492 } 493 rf_StartUserStats(raidPtr); 494 495 raidPtr->valid = 1; 496 return (0); 497 } 498 499 static int 500 init_rad(desc) 501 RF_RaidAccessDesc_t *desc; 502 { 503 int rc; 504 505 rc = rf_mutex_init(&desc->mutex); 506 if (rc) { 507 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, 508 __LINE__, rc); 509 return (rc); 510 } 511 rc = rf_cond_init(&desc->cond); 512 if (rc) { 513 RF_ERRORMSG3("Unable to init cond file %s line %d rc=%d\n", __FILE__, 514 __LINE__, rc); 515 rf_mutex_destroy(&desc->mutex); 516 return (rc); 517 } 518 return (0); 519 } 520 521 static void 522 clean_rad(desc) 523 RF_RaidAccessDesc_t *desc; 524 { 525 rf_mutex_destroy(&desc->mutex); 526 rf_cond_destroy(&desc->cond); 527 } 528 529 static void 530 rf_ShutdownRDFreeList(ignored) 531 void *ignored; 532 { 533 RF_FREELIST_DESTROY_CLEAN(rf_rad_freelist, next, (RF_RaidAccessDesc_t *), clean_rad); 534 } 535 536 static int 537 rf_ConfigureRDFreeList(listp) 538 RF_ShutdownList_t **listp; 539 { 540 int rc; 541 542 RF_FREELIST_CREATE(rf_rad_freelist, RF_MAX_FREE_RAD, 543 RF_RAD_INC, sizeof(RF_RaidAccessDesc_t)); 544 if (rf_rad_freelist == NULL) { 545 return (ENOMEM); 546 } 547 rc = rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, NULL); 548 if (rc) { 549 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__, 550 __LINE__, rc); 551 rf_ShutdownRDFreeList(NULL); 552 return (rc); 553 } 554 RF_FREELIST_PRIME_INIT(rf_rad_freelist, RF_RAD_INITIAL, next, 555 (RF_RaidAccessDesc_t *), init_rad); 556 return (0); 557 } 558 559 RF_RaidAccessDesc_t * 560 rf_AllocRaidAccDesc( 561 RF_Raid_t * raidPtr, 562 RF_IoType_t type, 563 RF_RaidAddr_t raidAddress, 564 RF_SectorCount_t numBlocks, 565 caddr_t bufPtr, 566 void *bp, 567 RF_DagHeader_t ** paramDAG, 568 RF_AccessStripeMapHeader_t ** paramASM, 569 RF_RaidAccessFlags_t flags, 570 void (*cbF) (struct buf *), 571 void *cbA, 572 RF_AccessState_t * states) 573 { 574 RF_RaidAccessDesc_t *desc; 575 576 RF_FREELIST_GET_INIT_NOUNLOCK(rf_rad_freelist, desc, next, (RF_RaidAccessDesc_t *), init_rad); 577 if (raidPtr->waitShutdown) { 578 /* 579 * Actually, we're shutting the array down. Free the desc 580 * and return NULL. 581 */ 582 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 583 RF_FREELIST_FREE_CLEAN(rf_rad_freelist, desc, next, clean_rad); 584 return (NULL); 585 } 586 raidPtr->nAccOutstanding++; 587 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 588 589 desc->raidPtr = (void *) raidPtr; 590 desc->type = type; 591 desc->raidAddress = raidAddress; 592 desc->numBlocks = numBlocks; 593 desc->bufPtr = bufPtr; 594 desc->bp = bp; 595 desc->paramDAG = paramDAG; 596 desc->paramASM = paramASM; 597 desc->flags = flags; 598 desc->states = states; 599 desc->state = 0; 600 601 desc->status = 0; 602 bzero((char *) &desc->tracerec, sizeof(RF_AccTraceEntry_t)); 603 desc->callbackFunc = (void (*) (RF_CBParam_t)) cbF; /* XXX */ 604 desc->callbackArg = cbA; 605 desc->next = NULL; 606 desc->head = desc; 607 desc->numPending = 0; 608 desc->cleanupList = NULL; 609 rf_MakeAllocList(desc->cleanupList); 610 return (desc); 611 } 612 613 void 614 rf_FreeRaidAccDesc(RF_RaidAccessDesc_t * desc) 615 { 616 RF_Raid_t *raidPtr = desc->raidPtr; 617 618 RF_ASSERT(desc); 619 620 rf_FreeAllocList(desc->cleanupList); 621 RF_FREELIST_FREE_CLEAN_NOUNLOCK(rf_rad_freelist, desc, next, clean_rad); 622 raidPtr->nAccOutstanding--; 623 if (raidPtr->waitShutdown) { 624 RF_SIGNAL_COND(raidPtr->outstandingCond); 625 } 626 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 627 } 628 /********************************************************************* 629 * Main routine for performing an access. 630 * Accesses are retried until a DAG can not be selected. This occurs 631 * when either the DAG library is incomplete or there are too many 632 * failures in a parity group. 633 ********************************************************************/ 634 int 635 rf_DoAccess( 636 RF_Raid_t * raidPtr, 637 RF_IoType_t type, 638 int async_flag, 639 RF_RaidAddr_t raidAddress, 640 RF_SectorCount_t numBlocks, 641 caddr_t bufPtr, 642 void *bp_in, 643 RF_DagHeader_t ** paramDAG, 644 RF_AccessStripeMapHeader_t ** paramASM, 645 RF_RaidAccessFlags_t flags, 646 RF_RaidAccessDesc_t ** paramDesc, 647 void (*cbF) (struct buf *), 648 void *cbA) 649 /* 650 type should be read or write 651 async_flag should be RF_TRUE or RF_FALSE 652 bp_in is a buf pointer. void * to facilitate ignoring it outside the kernel 653 */ 654 { 655 RF_RaidAccessDesc_t *desc; 656 caddr_t lbufPtr = bufPtr; 657 struct buf *bp = (struct buf *) bp_in; 658 659 raidAddress += rf_raidSectorOffset; 660 661 if (!raidPtr->valid) { 662 RF_ERRORMSG("RAIDframe driver not successfully configured. Rejecting access.\n"); 663 IO_BUF_ERR(bp, EINVAL); 664 return (EINVAL); 665 } 666 667 if (rf_accessDebug) { 668 669 printf("logBytes is: %d %d %d\n", raidPtr->raidid, 670 raidPtr->logBytesPerSector, 671 (int) rf_RaidAddressToByte(raidPtr, numBlocks)); 672 printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n", raidPtr->raidid, 673 (type == RF_IO_TYPE_READ) ? "READ" : "WRITE", (int) raidAddress, 674 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress), 675 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress + numBlocks - 1), 676 (int) numBlocks, 677 (int) rf_RaidAddressToByte(raidPtr, numBlocks), 678 (long) bufPtr); 679 } 680 if (raidAddress + numBlocks > raidPtr->totalSectors) { 681 682 printf("DoAccess: raid addr %lu too large to access %lu sectors. Max legal addr is %lu\n", 683 (u_long) raidAddress, (u_long) numBlocks, (u_long) raidPtr->totalSectors); 684 685 IO_BUF_ERR(bp, ENOSPC); 686 return (ENOSPC); 687 } 688 desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress, 689 numBlocks, lbufPtr, bp, paramDAG, paramASM, 690 flags, cbF, cbA, raidPtr->Layout.map->states); 691 692 if (desc == NULL) { 693 return (ENOMEM); 694 } 695 RF_ETIMER_START(desc->tracerec.tot_timer); 696 697 desc->async_flag = async_flag; 698 699 rf_ContinueRaidAccess(desc); 700 701 return (0); 702 } 703 /* force the array into reconfigured mode without doing reconstruction */ 704 int 705 rf_SetReconfiguredMode(raidPtr, row, col) 706 RF_Raid_t *raidPtr; 707 int row; 708 int col; 709 { 710 if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) { 711 printf("Can't set reconfigured mode in dedicated-spare array\n"); 712 RF_PANIC(); 713 } 714 RF_LOCK_MUTEX(raidPtr->mutex); 715 raidPtr->numFailures++; 716 raidPtr->Disks[row][col].status = rf_ds_dist_spared; 717 raidPtr->status[row] = rf_rs_reconfigured; 718 rf_update_component_labels(raidPtr); 719 /* install spare table only if declustering + distributed sparing 720 * architecture. */ 721 if (raidPtr->Layout.map->flags & RF_BD_DECLUSTERED) 722 rf_InstallSpareTable(raidPtr, row, col); 723 RF_UNLOCK_MUTEX(raidPtr->mutex); 724 return (0); 725 } 726 727 extern int fail_row, fail_col, fail_time; 728 extern int delayed_recon; 729 730 int 731 rf_FailDisk( 732 RF_Raid_t * raidPtr, 733 int frow, 734 int fcol, 735 int initRecon) 736 { 737 printf("raid%d: Failing disk r%d c%d\n", raidPtr->raidid, frow, fcol); 738 RF_LOCK_MUTEX(raidPtr->mutex); 739 raidPtr->numFailures++; 740 raidPtr->Disks[frow][fcol].status = rf_ds_failed; 741 raidPtr->status[frow] = rf_rs_degraded; 742 rf_update_component_labels(raidPtr); 743 RF_UNLOCK_MUTEX(raidPtr->mutex); 744 if (initRecon) 745 rf_ReconstructFailedDisk(raidPtr, frow, fcol); 746 return (0); 747 } 748 /* releases a thread that is waiting for the array to become quiesced. 749 * access_suspend_mutex should be locked upon calling this 750 */ 751 void 752 rf_SignalQuiescenceLock(raidPtr, reconDesc) 753 RF_Raid_t *raidPtr; 754 RF_RaidReconDesc_t *reconDesc; 755 { 756 if (rf_quiesceDebug) { 757 printf("raid%d: Signalling quiescence lock\n", 758 raidPtr->raidid); 759 } 760 raidPtr->access_suspend_release = 1; 761 762 if (raidPtr->waiting_for_quiescence) { 763 SIGNAL_QUIESCENT_COND(raidPtr); 764 } 765 } 766 /* suspends all new requests to the array. No effect on accesses that are in flight. */ 767 int 768 rf_SuspendNewRequestsAndWait(raidPtr) 769 RF_Raid_t *raidPtr; 770 { 771 if (rf_quiesceDebug) 772 printf("Suspending new reqs\n"); 773 774 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 775 raidPtr->accesses_suspended++; 776 raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1; 777 778 if (raidPtr->waiting_for_quiescence) { 779 raidPtr->access_suspend_release = 0; 780 while (!raidPtr->access_suspend_release) { 781 printf("Suspending: Waiting for Quiesence\n"); 782 WAIT_FOR_QUIESCENCE(raidPtr); 783 raidPtr->waiting_for_quiescence = 0; 784 } 785 } 786 printf("Quiesence reached..\n"); 787 788 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 789 return (raidPtr->waiting_for_quiescence); 790 } 791 /* wake up everyone waiting for quiescence to be released */ 792 void 793 rf_ResumeNewRequests(raidPtr) 794 RF_Raid_t *raidPtr; 795 { 796 RF_CallbackDesc_t *t, *cb; 797 798 if (rf_quiesceDebug) 799 printf("Resuming new reqs\n"); 800 801 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 802 raidPtr->accesses_suspended--; 803 if (raidPtr->accesses_suspended == 0) 804 cb = raidPtr->quiesce_wait_list; 805 else 806 cb = NULL; 807 raidPtr->quiesce_wait_list = NULL; 808 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 809 810 while (cb) { 811 t = cb; 812 cb = cb->next; 813 (t->callbackFunc) (t->callbackArg); 814 rf_FreeCallbackDesc(t); 815 } 816 } 817 /***************************************************************************************** 818 * 819 * debug routines 820 * 821 ****************************************************************************************/ 822 823 static void 824 set_debug_option(name, val) 825 char *name; 826 long val; 827 { 828 RF_DebugName_t *p; 829 830 for (p = rf_debugNames; p->name; p++) { 831 if (!strcmp(p->name, name)) { 832 *(p->ptr) = val; 833 printf("[Set debug variable %s to %ld]\n", name, val); 834 return; 835 } 836 } 837 RF_ERRORMSG1("Unknown debug string \"%s\"\n", name); 838 } 839 840 841 /* would like to use sscanf here, but apparently not available in kernel */ 842 /*ARGSUSED*/ 843 static void 844 rf_ConfigureDebug(cfgPtr) 845 RF_Config_t *cfgPtr; 846 { 847 char *val_p, *name_p, *white_p; 848 long val; 849 int i; 850 851 rf_ResetDebugOptions(); 852 for (i = 0; cfgPtr->debugVars[i][0] && i < RF_MAXDBGV; i++) { 853 name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]); 854 white_p = rf_find_white(name_p); /* skip to start of 2nd 855 * word */ 856 val_p = rf_find_non_white(white_p); 857 if (*val_p == '0' && *(val_p + 1) == 'x') 858 val = rf_htoi(val_p + 2); 859 else 860 val = rf_atoi(val_p); 861 *white_p = '\0'; 862 set_debug_option(name_p, val); 863 } 864 } 865 /* performance monitoring stuff */ 866 867 #define TIMEVAL_TO_US(t) (((long) t.tv_sec) * 1000000L + (long) t.tv_usec) 868 869 #if !defined(_KERNEL) && !defined(SIMULATE) 870 871 /* 872 * Throughput stats currently only used in user-level RAIDframe 873 */ 874 875 static int 876 rf_InitThroughputStats( 877 RF_ShutdownList_t ** listp, 878 RF_Raid_t * raidPtr, 879 RF_Config_t * cfgPtr) 880 { 881 int rc; 882 883 /* these used by user-level raidframe only */ 884 rc = rf_create_managed_mutex(listp, &raidPtr->throughputstats.mutex); 885 if (rc) { 886 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, 887 __LINE__, rc); 888 return (rc); 889 } 890 raidPtr->throughputstats.sum_io_us = 0; 891 raidPtr->throughputstats.num_ios = 0; 892 raidPtr->throughputstats.num_out_ios = 0; 893 return (0); 894 } 895 896 void 897 rf_StartThroughputStats(RF_Raid_t * raidPtr) 898 { 899 RF_LOCK_MUTEX(raidPtr->throughputstats.mutex); 900 raidPtr->throughputstats.num_ios++; 901 raidPtr->throughputstats.num_out_ios++; 902 if (raidPtr->throughputstats.num_out_ios == 1) 903 RF_GETTIME(raidPtr->throughputstats.start); 904 RF_UNLOCK_MUTEX(raidPtr->throughputstats.mutex); 905 } 906 907 static void 908 rf_StopThroughputStats(RF_Raid_t * raidPtr) 909 { 910 struct timeval diff; 911 912 RF_LOCK_MUTEX(raidPtr->throughputstats.mutex); 913 raidPtr->throughputstats.num_out_ios--; 914 if (raidPtr->throughputstats.num_out_ios == 0) { 915 RF_GETTIME(raidPtr->throughputstats.stop); 916 RF_TIMEVAL_DIFF(&raidPtr->throughputstats.start, &raidPtr->throughputstats.stop, &diff); 917 raidPtr->throughputstats.sum_io_us += TIMEVAL_TO_US(diff); 918 } 919 RF_UNLOCK_MUTEX(raidPtr->throughputstats.mutex); 920 } 921 922 static void 923 rf_PrintThroughputStats(RF_Raid_t * raidPtr) 924 { 925 RF_ASSERT(raidPtr->throughputstats.num_out_ios == 0); 926 if (raidPtr->throughputstats.sum_io_us != 0) { 927 printf("[Througphut: %8.2f IOs/second]\n", raidPtr->throughputstats.num_ios 928 / (raidPtr->throughputstats.sum_io_us / 1000000.0)); 929 } 930 } 931 #endif /* !KERNEL && !SIMULATE */ 932 933 void 934 rf_StartUserStats(RF_Raid_t * raidPtr) 935 { 936 RF_GETTIME(raidPtr->userstats.start); 937 raidPtr->userstats.sum_io_us = 0; 938 raidPtr->userstats.num_ios = 0; 939 raidPtr->userstats.num_sect_moved = 0; 940 } 941 942 void 943 rf_StopUserStats(RF_Raid_t * raidPtr) 944 { 945 RF_GETTIME(raidPtr->userstats.stop); 946 } 947 948 void 949 rf_UpdateUserStats(raidPtr, rt, numsect) 950 RF_Raid_t *raidPtr; 951 int rt; /* resp time in us */ 952 int numsect; /* number of sectors for this access */ 953 { 954 raidPtr->userstats.sum_io_us += rt; 955 raidPtr->userstats.num_ios++; 956 raidPtr->userstats.num_sect_moved += numsect; 957 } 958 959 void 960 rf_PrintUserStats(RF_Raid_t * raidPtr) 961 { 962 long elapsed_us, mbs, mbs_frac; 963 struct timeval diff; 964 965 RF_TIMEVAL_DIFF(&raidPtr->userstats.start, &raidPtr->userstats.stop, &diff); 966 elapsed_us = TIMEVAL_TO_US(diff); 967 968 /* 2000 sectors per megabyte, 10000000 microseconds per second */ 969 if (elapsed_us) 970 mbs = (raidPtr->userstats.num_sect_moved / 2000) / (elapsed_us / 1000000); 971 else 972 mbs = 0; 973 974 /* this computes only the first digit of the fractional mb/s moved */ 975 if (elapsed_us) { 976 mbs_frac = ((raidPtr->userstats.num_sect_moved / 200) / (elapsed_us / 1000000)) 977 - (mbs * 10); 978 } else { 979 mbs_frac = 0; 980 } 981 982 printf("Number of I/Os: %ld\n", raidPtr->userstats.num_ios); 983 printf("Elapsed time (us): %ld\n", elapsed_us); 984 printf("User I/Os per second: %ld\n", RF_DB0_CHECK(raidPtr->userstats.num_ios, (elapsed_us / 1000000))); 985 printf("Average user response time: %ld us\n", RF_DB0_CHECK(raidPtr->userstats.sum_io_us, raidPtr->userstats.num_ios)); 986 printf("Total sectors moved: %ld\n", raidPtr->userstats.num_sect_moved); 987 printf("Average access size (sect): %ld\n", RF_DB0_CHECK(raidPtr->userstats.num_sect_moved, raidPtr->userstats.num_ios)); 988 printf("Achieved data rate: %ld.%ld MB/sec\n", mbs, mbs_frac); 989 } 990