1 /* $NetBSD: rf_driver.c,v 1.139 2021/07/23 02:35:14 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * Copyright (c) 1995 Carnegie-Mellon University. 33 * All rights reserved. 34 * 35 * Author: Mark Holland, Khalil Amiri, Claudson Bornstein, William V. Courtright II, 36 * Robby Findler, Daniel Stodolsky, Rachad Youssef, Jim Zelenka 37 * 38 * Permission to use, copy, modify and distribute this software and 39 * its documentation is hereby granted, provided that both the copyright 40 * notice and this permission notice appear in all copies of the 41 * software, derivative works or modified versions, and any portions 42 * thereof, and that both notices appear in supporting documentation. 43 * 44 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 45 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 46 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 47 * 48 * Carnegie Mellon requests users of this software to return to 49 * 50 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 51 * School of Computer Science 52 * Carnegie Mellon University 53 * Pittsburgh PA 15213-3890 54 * 55 * any improvements or extensions that they make and grant Carnegie the 56 * rights to redistribute these changes. 57 */ 58 59 /****************************************************************************** 60 * 61 * rf_driver.c -- main setup, teardown, and access routines for the RAID driver 62 * 63 * all routines are prefixed with rf_ (raidframe), to avoid conficts. 64 * 65 ******************************************************************************/ 66 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: rf_driver.c,v 1.139 2021/07/23 02:35:14 oster Exp $"); 70 71 #ifdef _KERNEL_OPT 72 #include "opt_raid_diagnostic.h" 73 #endif 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/ioctl.h> 78 #include <sys/fcntl.h> 79 #include <sys/vnode.h> 80 81 82 #include "rf_archs.h" 83 #include "rf_threadstuff.h" 84 85 #include <sys/errno.h> 86 87 #include "rf_raid.h" 88 #include "rf_dag.h" 89 #include "rf_aselect.h" 90 #include "rf_diskqueue.h" 91 #include "rf_parityscan.h" 92 #include "rf_alloclist.h" 93 #include "rf_dagutils.h" 94 #include "rf_utils.h" 95 #include "rf_etimer.h" 96 #include "rf_acctrace.h" 97 #include "rf_general.h" 98 #include "rf_desc.h" 99 #include "rf_states.h" 100 #include "rf_decluster.h" 101 #include "rf_map.h" 102 #include "rf_revent.h" 103 #include "rf_callback.h" 104 #include "rf_engine.h" 105 #include "rf_mcpair.h" 106 #include "rf_nwayxor.h" 107 #include "rf_copyback.h" 108 #include "rf_driver.h" 109 #include "rf_options.h" 110 #include "rf_shutdown.h" 111 #include "rf_kintf.h" 112 #include "rf_paritymap.h" 113 114 #include <sys/buf.h> 115 116 #ifndef RF_ACCESS_DEBUG 117 #define RF_ACCESS_DEBUG 0 118 #endif 119 120 /* rad == RF_RaidAccessDesc_t */ 121 #define RF_MAX_FREE_RAD 128 122 #define RF_MIN_FREE_RAD 32 123 124 /* main configuration routines */ 125 static int raidframe_booted = 0; 126 127 static void rf_ConfigureDebug(RF_Config_t * cfgPtr); 128 static void set_debug_option(char *name, long val); 129 static void rf_UnconfigureArray(void); 130 static void rf_ShutdownRDFreeList(void *); 131 static int rf_ConfigureRDFreeList(RF_ShutdownList_t **, RF_Raid_t *, RF_Config_t *); 132 133 rf_declare_mutex2(rf_printf_mutex); /* debug only: avoids interleaved 134 * printfs by different stripes */ 135 136 #define SIGNAL_QUIESCENT_COND(_raid_) \ 137 rf_broadcast_cond2((_raid_)->access_suspend_cv) 138 #define WAIT_FOR_QUIESCENCE(_raid_) \ 139 rf_wait_cond2((_raid_)->access_suspend_cv, \ 140 (_raid_)->access_suspend_mutex) 141 142 static int configureCount = 0; /* number of active configurations */ 143 static int isconfigged = 0; /* is basic raidframe (non per-array) 144 * stuff configured */ 145 static rf_declare_mutex2(configureMutex); /* used to lock the configuration 146 * stuff */ 147 static RF_ShutdownList_t *globalShutdown; /* non array-specific 148 * stuff */ 149 150 static int rf_ConfigureRDFreeList(RF_ShutdownList_t ** listp, RF_Raid_t *raidPtr, RF_Config_t *cfgPtr); 151 static int rf_AllocEmergBuffers(RF_Raid_t *); 152 static void rf_FreeEmergBuffers(RF_Raid_t *); 153 static void rf_destroy_mutex_cond(RF_Raid_t *); 154 static void rf_alloc_mutex_cond(RF_Raid_t *); 155 156 /* called at system boot time */ 157 int 158 rf_BootRaidframe(bool boot) 159 { 160 161 if (boot) { 162 if (raidframe_booted) 163 return (EBUSY); 164 raidframe_booted = 1; 165 rf_init_mutex2(configureMutex, IPL_NONE); 166 configureCount = 0; 167 isconfigged = 0; 168 globalShutdown = NULL; 169 } else { 170 rf_destroy_mutex2(configureMutex); 171 raidframe_booted = 0; 172 } 173 return (0); 174 } 175 176 /* 177 * Called whenever an array is shutdown 178 */ 179 static void 180 rf_UnconfigureArray(void) 181 { 182 183 rf_lock_mutex2(configureMutex); 184 if (--configureCount == 0) { /* if no active configurations, shut 185 * everything down */ 186 rf_destroy_mutex2(rf_printf_mutex); 187 isconfigged = 0; 188 rf_ShutdownList(&globalShutdown); 189 190 /* 191 * We must wait until now, because the AllocList module 192 * uses the DebugMem module. 193 */ 194 #if RF_DEBUG_MEM 195 if (rf_memDebug) 196 rf_print_unfreed(); 197 #endif 198 } 199 rf_unlock_mutex2(configureMutex); 200 } 201 202 /* 203 * Called to shut down an array. 204 */ 205 int 206 rf_Shutdown(RF_Raid_t *raidPtr) 207 { 208 209 if (!raidPtr->valid) { 210 RF_ERRORMSG("Attempt to shut down unconfigured RAIDframe driver. Aborting shutdown\n"); 211 return (EINVAL); 212 } 213 /* 214 * wait for outstanding IOs to land 215 * As described in rf_raid.h, we use the rad_freelist lock 216 * to protect the per-array info about outstanding descs 217 * since we need to do freelist locking anyway, and this 218 * cuts down on the amount of serialization we've got going 219 * on. 220 */ 221 rf_lock_mutex2(raidPtr->rad_lock); 222 if (raidPtr->waitShutdown) { 223 rf_unlock_mutex2(raidPtr->rad_lock); 224 return (EBUSY); 225 } 226 raidPtr->waitShutdown = 1; 227 while (raidPtr->nAccOutstanding) { 228 rf_wait_cond2(raidPtr->outstandingCond, raidPtr->rad_lock); 229 } 230 231 /* Wait for any parity re-writes to stop... */ 232 while (raidPtr->parity_rewrite_in_progress) { 233 printf("raid%d: Waiting for parity re-write to exit...\n", 234 raidPtr->raidid); 235 rf_wait_cond2(raidPtr->parity_rewrite_cv, raidPtr->rad_lock); 236 } 237 rf_unlock_mutex2(raidPtr->rad_lock); 238 239 /* Wait for any reconstruction to stop... */ 240 rf_lock_mutex2(raidPtr->mutex); 241 while (raidPtr->reconInProgress) { 242 printf("raid%d: Waiting for reconstruction to stop...\n", 243 raidPtr->raidid); 244 rf_wait_cond2(raidPtr->waitForReconCond, raidPtr->mutex); 245 } 246 rf_unlock_mutex2(raidPtr->mutex); 247 248 raidPtr->valid = 0; 249 250 if (raidPtr->parity_map != NULL) 251 rf_paritymap_detach(raidPtr); 252 253 rf_update_component_labels(raidPtr, RF_FINAL_COMPONENT_UPDATE); 254 255 rf_UnconfigureVnodes(raidPtr); 256 257 rf_FreeEmergBuffers(raidPtr); 258 259 rf_ShutdownList(&raidPtr->shutdownList); 260 261 rf_destroy_mutex_cond(raidPtr); 262 263 rf_UnconfigureArray(); 264 265 return (0); 266 } 267 268 269 #define DO_INIT_CONFIGURE(f) { \ 270 rc = f (&globalShutdown); \ 271 if (rc) { \ 272 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 273 rf_ShutdownList(&globalShutdown); \ 274 configureCount--; \ 275 rf_unlock_mutex2(configureMutex); \ 276 rf_destroy_mutex2(rf_printf_mutex); \ 277 return(rc); \ 278 } \ 279 } 280 281 #define DO_RAID_FAIL() { \ 282 rf_UnconfigureVnodes(raidPtr); \ 283 rf_FreeEmergBuffers(raidPtr); \ 284 rf_ShutdownList(&raidPtr->shutdownList); \ 285 rf_UnconfigureArray(); \ 286 rf_destroy_mutex_cond(raidPtr); \ 287 } 288 289 #define DO_RAID_INIT_CONFIGURE(f) { \ 290 rc = f (&raidPtr->shutdownList, raidPtr, cfgPtr); \ 291 if (rc) { \ 292 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 293 DO_RAID_FAIL(); \ 294 return(rc); \ 295 } \ 296 } 297 298 int 299 rf_Configure(RF_Raid_t *raidPtr, RF_Config_t *cfgPtr, RF_AutoConfig_t *ac) 300 { 301 RF_RowCol_t col; 302 int rc; 303 bool swapped = false; 304 bool first = true; 305 306 rf_lock_mutex2(configureMutex); 307 configureCount++; 308 if (isconfigged == 0) { 309 rf_init_mutex2(rf_printf_mutex, IPL_VM); 310 311 /* initialize globals */ 312 DO_INIT_CONFIGURE(rf_ConfigureAllocList); 313 314 /* 315 * Yes, this does make debugging general to the whole 316 * system instead of being array specific. Bummer, drag. 317 */ 318 rf_ConfigureDebug(cfgPtr); 319 DO_INIT_CONFIGURE(rf_ConfigureDebugMem); 320 #if RF_ACC_TRACE > 0 321 DO_INIT_CONFIGURE(rf_ConfigureAccessTrace); 322 #endif 323 DO_INIT_CONFIGURE(rf_ConfigureNWayXor); 324 DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs); 325 DO_INIT_CONFIGURE(rf_ConfigureCopyback); 326 isconfigged = 1; 327 } 328 rf_unlock_mutex2(configureMutex); 329 330 rf_alloc_mutex_cond(raidPtr); 331 332 /* set up the cleanup list. Do this after ConfigureDebug so that 333 * value of memDebug will be set */ 334 335 rf_MakeAllocList(raidPtr->cleanupList); 336 if (raidPtr->cleanupList == NULL) { 337 DO_RAID_FAIL(); 338 return (ENOMEM); 339 } 340 rf_ShutdownCreate(&raidPtr->shutdownList, 341 (void (*) (void *)) rf_FreeAllocList, 342 raidPtr->cleanupList); 343 344 raidPtr->numCol = cfgPtr->numCol; 345 raidPtr->numSpare = cfgPtr->numSpare; 346 347 raidPtr->status = rf_rs_optimal; 348 raidPtr->reconControl = NULL; 349 350 DO_RAID_INIT_CONFIGURE(rf_ConfigureMapModule); 351 DO_RAID_INIT_CONFIGURE(rf_ConfigureReconEvent); 352 DO_RAID_INIT_CONFIGURE(rf_ConfigureCallback); 353 DO_RAID_INIT_CONFIGURE(rf_ConfigureRDFreeList); 354 DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList); 355 DO_RAID_INIT_CONFIGURE(rf_ConfigureMCPair); 356 DO_RAID_INIT_CONFIGURE(rf_ConfigureDAGs); 357 DO_RAID_INIT_CONFIGURE(rf_ConfigureReconstruction); 358 DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem); 359 DO_RAID_INIT_CONFIGURE(rf_ConfigurePSStatus); 360 361 DO_RAID_INIT_CONFIGURE(rf_ConfigureEngine); 362 DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLocks); 363 364 raidPtr->nAccOutstanding = 0; 365 raidPtr->waitShutdown = 0; 366 367 if (ac!=NULL) { 368 /* We have an AutoConfig structure.. Don't do the 369 normal disk configuration... call the auto config 370 stuff */ 371 rf_AutoConfigureDisks(raidPtr, cfgPtr, ac); 372 } else { 373 DO_RAID_INIT_CONFIGURE(rf_ConfigureDisks); 374 DO_RAID_INIT_CONFIGURE(rf_ConfigureSpareDisks); 375 } 376 /* do this after ConfigureDisks & ConfigureSpareDisks to be sure dev 377 * no. is set */ 378 DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueues); 379 380 DO_RAID_INIT_CONFIGURE(rf_ConfigureLayout); 381 382 383 384 385 /* Initialize per-RAID PSS bits */ 386 rf_InitPSStatus(raidPtr); 387 388 #if RF_INCLUDE_CHAINDECLUSTER > 0 389 for (col = 0; col < raidPtr->numCol; col++) { 390 /* 391 * XXX better distribution 392 */ 393 raidPtr->hist_diskreq[col] = 0; 394 } 395 #endif 396 raidPtr->numNewFailures = 0; 397 raidPtr->copyback_in_progress = 0; 398 raidPtr->parity_rewrite_in_progress = 0; 399 raidPtr->adding_hot_spare = 0; 400 raidPtr->recon_in_progress = 0; 401 402 raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs; 403 404 /* autoconfigure and root_partition will actually get filled in 405 after the config is done */ 406 raidPtr->autoconfigure = 0; 407 raidPtr->root_partition = 0; 408 raidPtr->last_unit = raidPtr->raidid; 409 raidPtr->config_order = 0; 410 411 if (rf_keepAccTotals) { 412 raidPtr->keep_acc_totals = 1; 413 } 414 415 /* Allocate a bunch of buffers to be used in low-memory conditions */ 416 raidPtr->iobuf = NULL; 417 418 rc = rf_AllocEmergBuffers(raidPtr); 419 if (rc) { 420 printf("raid%d: Unable to allocate emergency buffers.\n", 421 raidPtr->raidid); 422 DO_RAID_FAIL(); 423 return(rc); 424 } 425 426 /* Set up parity map stuff, if applicable. */ 427 #ifndef RF_NO_PARITY_MAP 428 rf_paritymap_attach(raidPtr, cfgPtr->force); 429 #endif 430 431 raidPtr->valid = 1; 432 433 printf("raid%d: %s\n", raidPtr->raidid, 434 raidPtr->Layout.map->configName); 435 printf("raid%d: Components:", raidPtr->raidid); 436 437 for (col = 0; col < raidPtr->numCol; col++) { 438 RF_ComponentLabel_t *clabel; 439 bool compswapped; 440 441 printf(" %s", raidPtr->Disks[col].devname); 442 if (RF_DEAD_DISK(raidPtr->Disks[col].status)) { 443 printf("[**FAILED**]"); 444 } 445 clabel = raidget_component_label(raidPtr, col); 446 compswapped = clabel->version == 447 bswap32(RF_COMPONENT_LABEL_VERSION); 448 if (first) 449 swapped = compswapped; 450 else if (swapped != compswapped) 451 printf("raid%d: Component %d has different endian " 452 "than first component.", raidPtr->raidid, col); 453 } 454 printf("\n"); 455 printf("raid%d: Total Sectors: %" PRIu64 " (%" PRIu64 " MB)\n", 456 raidPtr->raidid, 457 raidPtr->totalSectors, 458 (raidPtr->totalSectors / 1024 * 459 (1 << raidPtr->logBytesPerSector) / 1024)); 460 if (swapped) 461 printf("raid%d: Using swapped-endian component labels.\n", 462 raidPtr->raidid); 463 464 return (0); 465 } 466 467 468 /* 469 470 Routines to allocate and free the "emergency buffers" for a given 471 RAID set. These emergency buffers will be used when the kernel runs 472 out of kernel memory. 473 474 */ 475 476 static int 477 rf_AllocEmergBuffers(RF_Raid_t *raidPtr) 478 { 479 void *tmpbuf; 480 RF_VoidPointerListElem_t *vple; 481 int i; 482 483 /* XXX next line needs tuning... */ 484 raidPtr->numEmergencyBuffers = 10 * raidPtr->numCol; 485 #if DEBUG 486 printf("raid%d: allocating %d buffers of %d bytes.\n", 487 raidPtr->raidid, 488 raidPtr->numEmergencyBuffers, 489 (int)(raidPtr->Layout.sectorsPerStripeUnit << 490 raidPtr->logBytesPerSector)); 491 #endif 492 for (i = 0; i < raidPtr->numEmergencyBuffers; i++) { 493 tmpbuf = malloc( raidPtr->Layout.sectorsPerStripeUnit << 494 raidPtr->logBytesPerSector, 495 M_RAIDFRAME, M_WAITOK); 496 if (tmpbuf) { 497 vple = rf_AllocVPListElem(raidPtr); 498 vple->p= tmpbuf; 499 vple->next = raidPtr->iobuf; 500 raidPtr->iobuf = vple; 501 raidPtr->iobuf_count++; 502 } else { 503 printf("raid%d: failed to allocate emergency buffer!\n", 504 raidPtr->raidid); 505 return 1; 506 } 507 } 508 509 /* XXX next line needs tuning too... */ 510 raidPtr->numEmergencyStripeBuffers = 10; 511 for (i = 0; i < raidPtr->numEmergencyStripeBuffers; i++) { 512 tmpbuf = malloc( raidPtr->numCol * (raidPtr->Layout.sectorsPerStripeUnit << 513 raidPtr->logBytesPerSector), 514 M_RAIDFRAME, M_WAITOK); 515 if (tmpbuf) { 516 vple = rf_AllocVPListElem(raidPtr); 517 vple->p= tmpbuf; 518 vple->next = raidPtr->stripebuf; 519 raidPtr->stripebuf = vple; 520 raidPtr->stripebuf_count++; 521 } else { 522 printf("raid%d: failed to allocate emergency stripe buffer!\n", 523 raidPtr->raidid); 524 return 1; 525 } 526 } 527 528 return (0); 529 } 530 531 static void 532 rf_FreeEmergBuffers(RF_Raid_t *raidPtr) 533 { 534 RF_VoidPointerListElem_t *tmp; 535 536 /* Free the emergency IO buffers */ 537 while (raidPtr->iobuf != NULL) { 538 tmp = raidPtr->iobuf; 539 raidPtr->iobuf = raidPtr->iobuf->next; 540 free(tmp->p, M_RAIDFRAME); 541 rf_FreeVPListElem(raidPtr,tmp); 542 } 543 544 /* Free the emergency stripe buffers */ 545 while (raidPtr->stripebuf != NULL) { 546 tmp = raidPtr->stripebuf; 547 raidPtr->stripebuf = raidPtr->stripebuf->next; 548 free(tmp->p, M_RAIDFRAME); 549 rf_FreeVPListElem(raidPtr, tmp); 550 } 551 } 552 553 554 static void 555 rf_ShutdownRDFreeList(void *arg) 556 { 557 RF_Raid_t *raidPtr; 558 559 raidPtr = (RF_Raid_t *) arg; 560 561 pool_destroy(&raidPtr->pools.rad); 562 } 563 564 static int 565 rf_ConfigureRDFreeList(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr, 566 RF_Config_t *cfgPtr) 567 { 568 569 rf_pool_init(raidPtr, raidPtr->poolNames.rad, &raidPtr->pools.rad, sizeof(RF_RaidAccessDesc_t), 570 "rad", RF_MIN_FREE_RAD, RF_MAX_FREE_RAD); 571 rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, raidPtr); 572 return (0); 573 } 574 575 RF_RaidAccessDesc_t * 576 rf_AllocRaidAccDesc(RF_Raid_t *raidPtr, RF_IoType_t type, 577 RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 578 void *bufPtr, void *bp, RF_RaidAccessFlags_t flags, 579 const RF_AccessState_t *states) 580 { 581 RF_RaidAccessDesc_t *desc; 582 583 desc = pool_get(&raidPtr->pools.rad, PR_WAITOK); 584 585 rf_lock_mutex2(raidPtr->rad_lock); 586 if (raidPtr->waitShutdown) { 587 /* 588 * Actually, we're shutting the array down. Free the desc 589 * and return NULL. 590 */ 591 592 rf_unlock_mutex2(raidPtr->rad_lock); 593 pool_put(&raidPtr->pools.rad, desc); 594 return (NULL); 595 } 596 raidPtr->nAccOutstanding++; 597 598 rf_unlock_mutex2(raidPtr->rad_lock); 599 600 desc->raidPtr = (void *) raidPtr; 601 desc->type = type; 602 desc->raidAddress = raidAddress; 603 desc->numBlocks = numBlocks; 604 desc->bufPtr = bufPtr; 605 desc->bp = bp; 606 desc->flags = flags; 607 desc->states = states; 608 desc->state = 0; 609 desc->dagList = NULL; 610 611 desc->status = 0; 612 desc->numRetries = 0; 613 #if RF_ACC_TRACE > 0 614 memset(&desc->tracerec, 0, sizeof(desc->tracerec)); 615 #endif 616 desc->callbackFunc = NULL; 617 desc->callbackArg = NULL; 618 desc->next = NULL; 619 desc->iobufs = NULL; 620 desc->stripebufs = NULL; 621 622 return (desc); 623 } 624 625 void 626 rf_FreeRaidAccDesc(RF_RaidAccessDesc_t *desc) 627 { 628 RF_Raid_t *raidPtr = desc->raidPtr; 629 RF_DagList_t *dagList, *temp; 630 RF_VoidPointerListElem_t *tmp; 631 632 RF_ASSERT(desc); 633 634 /* Cleanup the dagList(s) */ 635 dagList = desc->dagList; 636 while(dagList != NULL) { 637 temp = dagList; 638 dagList = dagList->next; 639 rf_FreeDAGList(raidPtr, temp); 640 } 641 642 while (desc->iobufs) { 643 tmp = desc->iobufs; 644 desc->iobufs = desc->iobufs->next; 645 rf_FreeIOBuffer(raidPtr, tmp); 646 } 647 648 while (desc->stripebufs) { 649 tmp = desc->stripebufs; 650 desc->stripebufs = desc->stripebufs->next; 651 rf_FreeStripeBuffer(raidPtr, tmp); 652 } 653 654 pool_put(&raidPtr->pools.rad, desc); 655 rf_lock_mutex2(raidPtr->rad_lock); 656 raidPtr->nAccOutstanding--; 657 if (raidPtr->waitShutdown) { 658 rf_signal_cond2(raidPtr->outstandingCond); 659 } 660 rf_unlock_mutex2(raidPtr->rad_lock); 661 } 662 /********************************************************************* 663 * Main routine for performing an access. 664 * Accesses are retried until a DAG can not be selected. This occurs 665 * when either the DAG library is incomplete or there are too many 666 * failures in a parity group. 667 * 668 * type should be read or write. bp_in is a buf pointer. void *to 669 * facilitate ignoring it outside the kernel 670 ********************************************************************/ 671 int 672 rf_DoAccess(RF_Raid_t * raidPtr, RF_IoType_t type, RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 673 void *bufPtr, struct buf *bp, RF_RaidAccessFlags_t flags) 674 { 675 RF_RaidAccessDesc_t *desc; 676 void *lbufPtr = bufPtr; 677 678 raidAddress += rf_raidSectorOffset; 679 680 #if RF_ACCESS_DEBUG 681 if (rf_accessDebug) { 682 683 printf("logBytes is: %d %d %d\n", raidPtr->raidid, 684 raidPtr->logBytesPerSector, 685 (int) rf_RaidAddressToByte(raidPtr, numBlocks)); 686 printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n", raidPtr->raidid, 687 (type == RF_IO_TYPE_READ) ? "READ" : "WRITE", (int) raidAddress, 688 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress), 689 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress + numBlocks - 1), 690 (int) numBlocks, 691 (int) rf_RaidAddressToByte(raidPtr, numBlocks), 692 (long) bufPtr); 693 } 694 #endif 695 696 desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress, 697 numBlocks, lbufPtr, bp, flags, raidPtr->Layout.map->states); 698 699 if (desc == NULL) { 700 return (ENOMEM); 701 } 702 #if RF_ACC_TRACE > 0 703 RF_ETIMER_START(desc->tracerec.tot_timer); 704 #endif 705 706 if (raidPtr->parity_map != NULL && 707 type == RF_IO_TYPE_WRITE) 708 rf_paritymap_begin(raidPtr->parity_map, raidAddress, 709 numBlocks); 710 711 rf_ContinueRaidAccess(desc); 712 713 return (0); 714 } 715 #if 0 716 /* force the array into reconfigured mode without doing reconstruction */ 717 int 718 rf_SetReconfiguredMode(RF_Raid_t *raidPtr, int col) 719 { 720 if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) { 721 printf("Can't set reconfigured mode in dedicated-spare array\n"); 722 RF_PANIC(); 723 } 724 rf_lock_mutex2(raidPtr->mutex); 725 raidPtr->numFailures++; 726 raidPtr->Disks[col].status = rf_ds_dist_spared; 727 raidPtr->status = rf_rs_reconfigured; 728 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 729 /* install spare table only if declustering + distributed sparing 730 * architecture. */ 731 if (raidPtr->Layout.map->flags & RF_BD_DECLUSTERED) 732 rf_InstallSpareTable(raidPtr, col); 733 rf_unlock_mutex2(raidPtr->mutex); 734 return (0); 735 } 736 #endif 737 738 int 739 rf_FailDisk(RF_Raid_t *raidPtr, int fcol, int initRecon) 740 { 741 742 /* need to suspend IO's here -- if there are DAGs in flight 743 and we pull the rug out from under ci_vp, Bad Things 744 can happen. */ 745 746 rf_SuspendNewRequestsAndWait(raidPtr); 747 748 rf_lock_mutex2(raidPtr->mutex); 749 if (raidPtr->Disks[fcol].status != rf_ds_failed) { 750 /* must be failing something that is valid, or else it's 751 already marked as failed (in which case we don't 752 want to mark it failed again!) */ 753 raidPtr->numFailures++; 754 raidPtr->Disks[fcol].status = rf_ds_failed; 755 raidPtr->status = rf_rs_degraded; 756 } 757 rf_unlock_mutex2(raidPtr->mutex); 758 759 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 760 761 /* Close the component, so that it's not "locked" if someone 762 else want's to use it! */ 763 764 rf_close_component(raidPtr, raidPtr->raid_cinfo[fcol].ci_vp, 765 raidPtr->Disks[fcol].auto_configured); 766 767 rf_lock_mutex2(raidPtr->mutex); 768 raidPtr->raid_cinfo[fcol].ci_vp = NULL; 769 770 /* Need to mark the component as not being auto_configured 771 (in case it was previously). */ 772 773 raidPtr->Disks[fcol].auto_configured = 0; 774 rf_unlock_mutex2(raidPtr->mutex); 775 /* now we can allow IO to continue -- we'll be suspending it 776 again in rf_ReconstructFailedDisk() if we have to.. */ 777 778 rf_ResumeNewRequests(raidPtr); 779 780 if (initRecon) 781 rf_ReconstructFailedDisk(raidPtr, fcol); 782 return (0); 783 } 784 /* releases a thread that is waiting for the array to become quiesced. 785 * access_suspend_mutex should be locked upon calling this 786 */ 787 void 788 rf_SignalQuiescenceLock(RF_Raid_t *raidPtr) 789 { 790 #if RF_DEBUG_QUIESCE 791 if (rf_quiesceDebug) { 792 printf("raid%d: Signalling quiescence lock\n", 793 raidPtr->raidid); 794 } 795 #endif 796 raidPtr->access_suspend_release = 1; 797 798 if (raidPtr->waiting_for_quiescence) { 799 SIGNAL_QUIESCENT_COND(raidPtr); 800 } 801 } 802 /* suspends all new requests to the array. No effect on accesses that are in flight. */ 803 int 804 rf_SuspendNewRequestsAndWait(RF_Raid_t *raidPtr) 805 { 806 #if RF_DEBUG_QUIESCE 807 if (rf_quiesceDebug) 808 printf("raid%d: Suspending new reqs\n", raidPtr->raidid); 809 #endif 810 rf_lock_mutex2(raidPtr->access_suspend_mutex); 811 raidPtr->accesses_suspended++; 812 raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1; 813 814 if (raidPtr->waiting_for_quiescence) { 815 raidPtr->access_suspend_release = 0; 816 while (!raidPtr->access_suspend_release) { 817 #if RF_DEBUG_QUIESCE 818 printf("raid%d: Suspending: Waiting for Quiescence\n", 819 raidPtr->raidid); 820 #endif 821 WAIT_FOR_QUIESCENCE(raidPtr); 822 raidPtr->waiting_for_quiescence = 0; 823 } 824 } 825 #if RF_DEBUG_QUIESCE 826 printf("raid%d: Quiescence reached..\n", raidPtr->raidid); 827 #endif 828 829 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 830 return (raidPtr->waiting_for_quiescence); 831 } 832 /* wake up everyone waiting for quiescence to be released */ 833 void 834 rf_ResumeNewRequests(RF_Raid_t *raidPtr) 835 { 836 RF_CallbackFuncDesc_t *t, *cb; 837 838 #if RF_DEBUG_QUIESCE 839 if (rf_quiesceDebug) 840 printf("raid%d: Resuming new requests\n", raidPtr->raidid); 841 #endif 842 843 rf_lock_mutex2(raidPtr->access_suspend_mutex); 844 raidPtr->accesses_suspended--; 845 if (raidPtr->accesses_suspended == 0) 846 cb = raidPtr->quiesce_wait_list; 847 else 848 cb = NULL; 849 raidPtr->quiesce_wait_list = NULL; 850 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 851 852 while (cb) { 853 t = cb; 854 cb = cb->next; 855 (t->callbackFunc) (t->callbackArg); 856 rf_FreeCallbackFuncDesc(raidPtr, t); 857 } 858 } 859 /***************************************************************************************** 860 * 861 * debug routines 862 * 863 ****************************************************************************************/ 864 865 static void 866 set_debug_option(char *name, long val) 867 { 868 RF_DebugName_t *p; 869 870 for (p = rf_debugNames; p->name; p++) { 871 if (!strcmp(p->name, name)) { 872 *(p->ptr) = val; 873 printf("[Set debug variable %s to %ld]\n", name, val); 874 return; 875 } 876 } 877 RF_ERRORMSG1("Unknown debug string \"%s\"\n", name); 878 } 879 880 881 /* would like to use sscanf here, but apparently not available in kernel */ 882 /*ARGSUSED*/ 883 static void 884 rf_ConfigureDebug(RF_Config_t *cfgPtr) 885 { 886 char *val_p, *name_p, *white_p; 887 long val; 888 int i; 889 890 rf_ResetDebugOptions(); 891 for (i = 0; i < RF_MAXDBGV && cfgPtr->debugVars[i][0]; i++) { 892 name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]); 893 white_p = rf_find_white(name_p); /* skip to start of 2nd 894 * word */ 895 val_p = rf_find_non_white(white_p); 896 if (*val_p == '0' && *(val_p + 1) == 'x') 897 val = rf_htoi(val_p + 2); 898 else 899 val = rf_atoi(val_p); 900 *white_p = '\0'; 901 set_debug_option(name_p, val); 902 } 903 } 904 905 void 906 rf_print_panic_message(int line, const char *file) 907 { 908 kern_assert("raidframe error at line %d file %s", line, file); 909 } 910 911 #ifdef RAID_DIAGNOSTIC 912 void 913 rf_print_assert_panic_message(int line, const char *file, const char *condition) 914 { 915 kern_assert("raidframe error at line %d file %s (failed asserting %s)\n", 916 line, file, condition); 917 } 918 #endif 919 920 void 921 rf_print_unable_to_init_mutex(const char *file, int line, int rc) 922 { 923 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", 924 file, line, rc); 925 } 926 927 void 928 rf_print_unable_to_add_shutdown(const char *file, int line, int rc) 929 { 930 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", 931 file, line, rc); 932 } 933 934 static void 935 rf_alloc_mutex_cond(RF_Raid_t *raidPtr) 936 { 937 938 rf_init_mutex2(raidPtr->mutex, IPL_VM); 939 940 rf_init_cond2(raidPtr->outstandingCond, "rfocond"); 941 rf_init_cond2(raidPtr->parity_rewrite_cv, "rfprwshutdown"); 942 rf_init_mutex2(raidPtr->rad_lock, IPL_VM); 943 944 rf_init_mutex2(raidPtr->access_suspend_mutex, IPL_VM); 945 rf_init_cond2(raidPtr->access_suspend_cv, "rfquiesce"); 946 947 rf_init_cond2(raidPtr->waitForReconCond, "rfrcnw"); 948 949 rf_init_cond2(raidPtr->adding_hot_spare_cv, "raidhs"); 950 } 951 952 static void 953 rf_destroy_mutex_cond(RF_Raid_t *raidPtr) 954 { 955 956 rf_destroy_cond2(raidPtr->waitForReconCond); 957 rf_destroy_cond2(raidPtr->adding_hot_spare_cv); 958 959 rf_destroy_mutex2(raidPtr->access_suspend_mutex); 960 rf_destroy_cond2(raidPtr->access_suspend_cv); 961 962 rf_destroy_cond2(raidPtr->parity_rewrite_cv); 963 rf_destroy_cond2(raidPtr->outstandingCond); 964 rf_destroy_mutex2(raidPtr->rad_lock); 965 966 rf_destroy_mutex2(raidPtr->mutex); 967 } 968