1 /* $NetBSD: rf_driver.c,v 1.137 2021/05/26 06:11:50 mrg 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 1.137 2021/05/26 06:11:50 mrg 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 **); 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); 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 */ 312 313 DO_INIT_CONFIGURE(rf_ConfigureAllocList); 314 315 /* 316 * Yes, this does make debugging general to the whole 317 * system instead of being array specific. Bummer, drag. 318 */ 319 rf_ConfigureDebug(cfgPtr); 320 DO_INIT_CONFIGURE(rf_ConfigureDebugMem); 321 #if RF_ACC_TRACE > 0 322 DO_INIT_CONFIGURE(rf_ConfigureAccessTrace); 323 #endif 324 DO_INIT_CONFIGURE(rf_ConfigureMapModule); 325 DO_INIT_CONFIGURE(rf_ConfigureReconEvent); 326 DO_INIT_CONFIGURE(rf_ConfigureCallback); 327 DO_INIT_CONFIGURE(rf_ConfigureRDFreeList); 328 DO_INIT_CONFIGURE(rf_ConfigureNWayXor); 329 DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList); 330 DO_INIT_CONFIGURE(rf_ConfigureMCPair); 331 DO_INIT_CONFIGURE(rf_ConfigureDAGs); 332 DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs); 333 DO_INIT_CONFIGURE(rf_ConfigureReconstruction); 334 DO_INIT_CONFIGURE(rf_ConfigureCopyback); 335 DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem); 336 DO_INIT_CONFIGURE(rf_ConfigurePSStatus); 337 isconfigged = 1; 338 } 339 rf_unlock_mutex2(configureMutex); 340 341 rf_alloc_mutex_cond(raidPtr); 342 343 /* set up the cleanup list. Do this after ConfigureDebug so that 344 * value of memDebug will be set */ 345 346 rf_MakeAllocList(raidPtr->cleanupList); 347 if (raidPtr->cleanupList == NULL) { 348 DO_RAID_FAIL(); 349 return (ENOMEM); 350 } 351 rf_ShutdownCreate(&raidPtr->shutdownList, 352 (void (*) (void *)) rf_FreeAllocList, 353 raidPtr->cleanupList); 354 355 raidPtr->numCol = cfgPtr->numCol; 356 raidPtr->numSpare = cfgPtr->numSpare; 357 358 raidPtr->status = rf_rs_optimal; 359 raidPtr->reconControl = NULL; 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 /* Initialize per-RAID PSS bits */ 383 rf_InitPSStatus(raidPtr); 384 385 #if RF_INCLUDE_CHAINDECLUSTER > 0 386 for (col = 0; col < raidPtr->numCol; col++) { 387 /* 388 * XXX better distribution 389 */ 390 raidPtr->hist_diskreq[col] = 0; 391 } 392 #endif 393 raidPtr->numNewFailures = 0; 394 raidPtr->copyback_in_progress = 0; 395 raidPtr->parity_rewrite_in_progress = 0; 396 raidPtr->adding_hot_spare = 0; 397 raidPtr->recon_in_progress = 0; 398 399 raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs; 400 401 /* autoconfigure and root_partition will actually get filled in 402 after the config is done */ 403 raidPtr->autoconfigure = 0; 404 raidPtr->root_partition = 0; 405 raidPtr->last_unit = raidPtr->raidid; 406 raidPtr->config_order = 0; 407 408 if (rf_keepAccTotals) { 409 raidPtr->keep_acc_totals = 1; 410 } 411 412 /* Allocate a bunch of buffers to be used in low-memory conditions */ 413 raidPtr->iobuf = NULL; 414 415 rc = rf_AllocEmergBuffers(raidPtr); 416 if (rc) { 417 printf("raid%d: Unable to allocate emergency buffers.\n", 418 raidPtr->raidid); 419 DO_RAID_FAIL(); 420 return(rc); 421 } 422 423 /* Set up parity map stuff, if applicable. */ 424 #ifndef RF_NO_PARITY_MAP 425 rf_paritymap_attach(raidPtr, cfgPtr->force); 426 #endif 427 428 raidPtr->valid = 1; 429 430 printf("raid%d: %s\n", raidPtr->raidid, 431 raidPtr->Layout.map->configName); 432 printf("raid%d: Components:", raidPtr->raidid); 433 434 for (col = 0; col < raidPtr->numCol; col++) { 435 RF_ComponentLabel_t *clabel; 436 bool compswapped; 437 438 printf(" %s", raidPtr->Disks[col].devname); 439 if (RF_DEAD_DISK(raidPtr->Disks[col].status)) { 440 printf("[**FAILED**]"); 441 } 442 clabel = raidget_component_label(raidPtr, col); 443 compswapped = clabel->version == 444 bswap32(RF_COMPONENT_LABEL_VERSION); 445 if (first) 446 swapped = compswapped; 447 else if (swapped != compswapped) 448 printf("raid%d: Component %d has different endian " 449 "than first component.", raidPtr->raidid, col); 450 } 451 printf("\n"); 452 printf("raid%d: Total Sectors: %" PRIu64 " (%" PRIu64 " MB)\n", 453 raidPtr->raidid, 454 raidPtr->totalSectors, 455 (raidPtr->totalSectors / 1024 * 456 (1 << raidPtr->logBytesPerSector) / 1024)); 457 if (swapped) 458 printf("raid%d: Using swapped-endian component labels.\n", 459 raidPtr->raidid); 460 461 return (0); 462 } 463 464 465 /* 466 467 Routines to allocate and free the "emergency buffers" for a given 468 RAID set. These emergency buffers will be used when the kernel runs 469 out of kernel memory. 470 471 */ 472 473 static int 474 rf_AllocEmergBuffers(RF_Raid_t *raidPtr) 475 { 476 void *tmpbuf; 477 RF_VoidPointerListElem_t *vple; 478 int i; 479 480 /* XXX next line needs tuning... */ 481 raidPtr->numEmergencyBuffers = 10 * raidPtr->numCol; 482 #if DEBUG 483 printf("raid%d: allocating %d buffers of %d bytes.\n", 484 raidPtr->raidid, 485 raidPtr->numEmergencyBuffers, 486 (int)(raidPtr->Layout.sectorsPerStripeUnit << 487 raidPtr->logBytesPerSector)); 488 #endif 489 for (i = 0; i < raidPtr->numEmergencyBuffers; i++) { 490 tmpbuf = malloc( raidPtr->Layout.sectorsPerStripeUnit << 491 raidPtr->logBytesPerSector, 492 M_RAIDFRAME, M_WAITOK); 493 if (tmpbuf) { 494 vple = rf_AllocVPListElem(); 495 vple->p= tmpbuf; 496 vple->next = raidPtr->iobuf; 497 raidPtr->iobuf = vple; 498 raidPtr->iobuf_count++; 499 } else { 500 printf("raid%d: failed to allocate emergency buffer!\n", 501 raidPtr->raidid); 502 return 1; 503 } 504 } 505 506 /* XXX next line needs tuning too... */ 507 raidPtr->numEmergencyStripeBuffers = 10; 508 for (i = 0; i < raidPtr->numEmergencyStripeBuffers; i++) { 509 tmpbuf = malloc( raidPtr->numCol * (raidPtr->Layout.sectorsPerStripeUnit << 510 raidPtr->logBytesPerSector), 511 M_RAIDFRAME, M_WAITOK); 512 if (tmpbuf) { 513 vple = rf_AllocVPListElem(); 514 vple->p= tmpbuf; 515 vple->next = raidPtr->stripebuf; 516 raidPtr->stripebuf = vple; 517 raidPtr->stripebuf_count++; 518 } else { 519 printf("raid%d: failed to allocate emergency stripe buffer!\n", 520 raidPtr->raidid); 521 return 1; 522 } 523 } 524 525 return (0); 526 } 527 528 static void 529 rf_FreeEmergBuffers(RF_Raid_t *raidPtr) 530 { 531 RF_VoidPointerListElem_t *tmp; 532 533 /* Free the emergency IO buffers */ 534 while (raidPtr->iobuf != NULL) { 535 tmp = raidPtr->iobuf; 536 raidPtr->iobuf = raidPtr->iobuf->next; 537 free(tmp->p, M_RAIDFRAME); 538 rf_FreeVPListElem(tmp); 539 } 540 541 /* Free the emergency stripe buffers */ 542 while (raidPtr->stripebuf != NULL) { 543 tmp = raidPtr->stripebuf; 544 raidPtr->stripebuf = raidPtr->stripebuf->next; 545 free(tmp->p, M_RAIDFRAME); 546 rf_FreeVPListElem(tmp); 547 } 548 } 549 550 551 static void 552 rf_ShutdownRDFreeList(void *ignored) 553 { 554 pool_destroy(&rf_pools.rad); 555 } 556 557 static int 558 rf_ConfigureRDFreeList(RF_ShutdownList_t **listp) 559 { 560 561 rf_pool_init(&rf_pools.rad, sizeof(RF_RaidAccessDesc_t), 562 "rf_rad_pl", RF_MIN_FREE_RAD, RF_MAX_FREE_RAD); 563 rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, NULL); 564 return (0); 565 } 566 567 RF_RaidAccessDesc_t * 568 rf_AllocRaidAccDesc(RF_Raid_t *raidPtr, RF_IoType_t type, 569 RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 570 void *bufPtr, void *bp, RF_RaidAccessFlags_t flags, 571 const RF_AccessState_t *states) 572 { 573 RF_RaidAccessDesc_t *desc; 574 575 desc = pool_get(&rf_pools.rad, PR_WAITOK); 576 577 rf_lock_mutex2(raidPtr->rad_lock); 578 if (raidPtr->waitShutdown) { 579 /* 580 * Actually, we're shutting the array down. Free the desc 581 * and return NULL. 582 */ 583 584 rf_unlock_mutex2(raidPtr->rad_lock); 585 pool_put(&rf_pools.rad, desc); 586 return (NULL); 587 } 588 raidPtr->nAccOutstanding++; 589 590 rf_unlock_mutex2(raidPtr->rad_lock); 591 592 desc->raidPtr = (void *) raidPtr; 593 desc->type = type; 594 desc->raidAddress = raidAddress; 595 desc->numBlocks = numBlocks; 596 desc->bufPtr = bufPtr; 597 desc->bp = bp; 598 desc->flags = flags; 599 desc->states = states; 600 desc->state = 0; 601 desc->dagList = NULL; 602 603 desc->status = 0; 604 desc->numRetries = 0; 605 #if RF_ACC_TRACE > 0 606 memset(&desc->tracerec, 0, sizeof(desc->tracerec)); 607 #endif 608 desc->callbackFunc = NULL; 609 desc->callbackArg = NULL; 610 desc->next = NULL; 611 desc->iobufs = NULL; 612 desc->stripebufs = NULL; 613 614 return (desc); 615 } 616 617 void 618 rf_FreeRaidAccDesc(RF_RaidAccessDesc_t *desc) 619 { 620 RF_Raid_t *raidPtr = desc->raidPtr; 621 RF_DagList_t *dagList, *temp; 622 RF_VoidPointerListElem_t *tmp; 623 624 RF_ASSERT(desc); 625 626 /* Cleanup the dagList(s) */ 627 dagList = desc->dagList; 628 while(dagList != NULL) { 629 temp = dagList; 630 dagList = dagList->next; 631 rf_FreeDAGList(temp); 632 } 633 634 while (desc->iobufs) { 635 tmp = desc->iobufs; 636 desc->iobufs = desc->iobufs->next; 637 rf_FreeIOBuffer(raidPtr, tmp); 638 } 639 640 while (desc->stripebufs) { 641 tmp = desc->stripebufs; 642 desc->stripebufs = desc->stripebufs->next; 643 rf_FreeStripeBuffer(raidPtr, tmp); 644 } 645 646 pool_put(&rf_pools.rad, desc); 647 rf_lock_mutex2(raidPtr->rad_lock); 648 raidPtr->nAccOutstanding--; 649 if (raidPtr->waitShutdown) { 650 rf_signal_cond2(raidPtr->outstandingCond); 651 } 652 rf_unlock_mutex2(raidPtr->rad_lock); 653 } 654 /********************************************************************* 655 * Main routine for performing an access. 656 * Accesses are retried until a DAG can not be selected. This occurs 657 * when either the DAG library is incomplete or there are too many 658 * failures in a parity group. 659 * 660 * type should be read or write async_flag should be RF_TRUE or 661 * RF_FALSE bp_in is a buf pointer. void *to facilitate ignoring it 662 * outside the kernel 663 ********************************************************************/ 664 int 665 rf_DoAccess(RF_Raid_t * raidPtr, RF_IoType_t type, int async_flag, 666 RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 667 void *bufPtr, struct buf *bp, RF_RaidAccessFlags_t flags) 668 { 669 RF_RaidAccessDesc_t *desc; 670 void *lbufPtr = bufPtr; 671 672 raidAddress += rf_raidSectorOffset; 673 674 #if RF_ACCESS_DEBUG 675 if (rf_accessDebug) { 676 677 printf("logBytes is: %d %d %d\n", raidPtr->raidid, 678 raidPtr->logBytesPerSector, 679 (int) rf_RaidAddressToByte(raidPtr, numBlocks)); 680 printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n", raidPtr->raidid, 681 (type == RF_IO_TYPE_READ) ? "READ" : "WRITE", (int) raidAddress, 682 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress), 683 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress + numBlocks - 1), 684 (int) numBlocks, 685 (int) rf_RaidAddressToByte(raidPtr, numBlocks), 686 (long) bufPtr); 687 } 688 #endif 689 690 desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress, 691 numBlocks, lbufPtr, bp, flags, raidPtr->Layout.map->states); 692 693 if (desc == NULL) { 694 return (ENOMEM); 695 } 696 #if RF_ACC_TRACE > 0 697 RF_ETIMER_START(desc->tracerec.tot_timer); 698 #endif 699 desc->async_flag = async_flag; 700 701 if (raidPtr->parity_map != NULL && 702 type == RF_IO_TYPE_WRITE) 703 rf_paritymap_begin(raidPtr->parity_map, raidAddress, 704 numBlocks); 705 706 rf_ContinueRaidAccess(desc); 707 708 return (0); 709 } 710 #if 0 711 /* force the array into reconfigured mode without doing reconstruction */ 712 int 713 rf_SetReconfiguredMode(RF_Raid_t *raidPtr, int col) 714 { 715 if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) { 716 printf("Can't set reconfigured mode in dedicated-spare array\n"); 717 RF_PANIC(); 718 } 719 rf_lock_mutex2(raidPtr->mutex); 720 raidPtr->numFailures++; 721 raidPtr->Disks[col].status = rf_ds_dist_spared; 722 raidPtr->status = rf_rs_reconfigured; 723 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 724 /* install spare table only if declustering + distributed sparing 725 * architecture. */ 726 if (raidPtr->Layout.map->flags & RF_BD_DECLUSTERED) 727 rf_InstallSpareTable(raidPtr, col); 728 rf_unlock_mutex2(raidPtr->mutex); 729 return (0); 730 } 731 #endif 732 733 int 734 rf_FailDisk(RF_Raid_t *raidPtr, int fcol, int initRecon) 735 { 736 737 /* need to suspend IO's here -- if there are DAGs in flight 738 and we pull the rug out from under ci_vp, Bad Things 739 can happen. */ 740 741 rf_SuspendNewRequestsAndWait(raidPtr); 742 743 rf_lock_mutex2(raidPtr->mutex); 744 if (raidPtr->Disks[fcol].status != rf_ds_failed) { 745 /* must be failing something that is valid, or else it's 746 already marked as failed (in which case we don't 747 want to mark it failed again!) */ 748 raidPtr->numFailures++; 749 raidPtr->Disks[fcol].status = rf_ds_failed; 750 raidPtr->status = rf_rs_degraded; 751 } 752 rf_unlock_mutex2(raidPtr->mutex); 753 754 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 755 756 /* Close the component, so that it's not "locked" if someone 757 else want's to use it! */ 758 759 rf_close_component(raidPtr, raidPtr->raid_cinfo[fcol].ci_vp, 760 raidPtr->Disks[fcol].auto_configured); 761 762 rf_lock_mutex2(raidPtr->mutex); 763 raidPtr->raid_cinfo[fcol].ci_vp = NULL; 764 765 /* Need to mark the component as not being auto_configured 766 (in case it was previously). */ 767 768 raidPtr->Disks[fcol].auto_configured = 0; 769 rf_unlock_mutex2(raidPtr->mutex); 770 /* now we can allow IO to continue -- we'll be suspending it 771 again in rf_ReconstructFailedDisk() if we have to.. */ 772 773 rf_ResumeNewRequests(raidPtr); 774 775 if (initRecon) 776 rf_ReconstructFailedDisk(raidPtr, fcol); 777 return (0); 778 } 779 /* releases a thread that is waiting for the array to become quiesced. 780 * access_suspend_mutex should be locked upon calling this 781 */ 782 void 783 rf_SignalQuiescenceLock(RF_Raid_t *raidPtr) 784 { 785 #if RF_DEBUG_QUIESCE 786 if (rf_quiesceDebug) { 787 printf("raid%d: Signalling quiescence lock\n", 788 raidPtr->raidid); 789 } 790 #endif 791 raidPtr->access_suspend_release = 1; 792 793 if (raidPtr->waiting_for_quiescence) { 794 SIGNAL_QUIESCENT_COND(raidPtr); 795 } 796 } 797 /* suspends all new requests to the array. No effect on accesses that are in flight. */ 798 int 799 rf_SuspendNewRequestsAndWait(RF_Raid_t *raidPtr) 800 { 801 #if RF_DEBUG_QUIESCE 802 if (rf_quiesceDebug) 803 printf("raid%d: Suspending new reqs\n", raidPtr->raidid); 804 #endif 805 rf_lock_mutex2(raidPtr->access_suspend_mutex); 806 raidPtr->accesses_suspended++; 807 raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1; 808 809 if (raidPtr->waiting_for_quiescence) { 810 raidPtr->access_suspend_release = 0; 811 while (!raidPtr->access_suspend_release) { 812 #if RF_DEBUG_QUIESCE 813 printf("raid%d: Suspending: Waiting for Quiescence\n", 814 raidPtr->raidid); 815 #endif 816 WAIT_FOR_QUIESCENCE(raidPtr); 817 raidPtr->waiting_for_quiescence = 0; 818 } 819 } 820 #if RF_DEBUG_QUIESCE 821 printf("raid%d: Quiescence reached..\n", raidPtr->raidid); 822 #endif 823 824 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 825 return (raidPtr->waiting_for_quiescence); 826 } 827 /* wake up everyone waiting for quiescence to be released */ 828 void 829 rf_ResumeNewRequests(RF_Raid_t *raidPtr) 830 { 831 RF_CallbackFuncDesc_t *t, *cb; 832 833 #if RF_DEBUG_QUIESCE 834 if (rf_quiesceDebug) 835 printf("raid%d: Resuming new requests\n", raidPtr->raidid); 836 #endif 837 838 rf_lock_mutex2(raidPtr->access_suspend_mutex); 839 raidPtr->accesses_suspended--; 840 if (raidPtr->accesses_suspended == 0) 841 cb = raidPtr->quiesce_wait_list; 842 else 843 cb = NULL; 844 raidPtr->quiesce_wait_list = NULL; 845 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 846 847 while (cb) { 848 t = cb; 849 cb = cb->next; 850 (t->callbackFunc) (t->callbackArg); 851 rf_FreeCallbackFuncDesc(t); 852 } 853 } 854 /***************************************************************************************** 855 * 856 * debug routines 857 * 858 ****************************************************************************************/ 859 860 static void 861 set_debug_option(char *name, long val) 862 { 863 RF_DebugName_t *p; 864 865 for (p = rf_debugNames; p->name; p++) { 866 if (!strcmp(p->name, name)) { 867 *(p->ptr) = val; 868 printf("[Set debug variable %s to %ld]\n", name, val); 869 return; 870 } 871 } 872 RF_ERRORMSG1("Unknown debug string \"%s\"\n", name); 873 } 874 875 876 /* would like to use sscanf here, but apparently not available in kernel */ 877 /*ARGSUSED*/ 878 static void 879 rf_ConfigureDebug(RF_Config_t *cfgPtr) 880 { 881 char *val_p, *name_p, *white_p; 882 long val; 883 int i; 884 885 rf_ResetDebugOptions(); 886 for (i = 0; i < RF_MAXDBGV && cfgPtr->debugVars[i][0]; i++) { 887 name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]); 888 white_p = rf_find_white(name_p); /* skip to start of 2nd 889 * word */ 890 val_p = rf_find_non_white(white_p); 891 if (*val_p == '0' && *(val_p + 1) == 'x') 892 val = rf_htoi(val_p + 2); 893 else 894 val = rf_atoi(val_p); 895 *white_p = '\0'; 896 set_debug_option(name_p, val); 897 } 898 } 899 900 void 901 rf_print_panic_message(int line, const char *file) 902 { 903 kern_assert("raidframe error at line %d file %s", line, file); 904 } 905 906 #ifdef RAID_DIAGNOSTIC 907 void 908 rf_print_assert_panic_message(int line, const char *file, const char *condition) 909 { 910 kern_assert("raidframe error at line %d file %s (failed asserting %s)\n", 911 line, file, condition); 912 } 913 #endif 914 915 void 916 rf_print_unable_to_init_mutex(const char *file, int line, int rc) 917 { 918 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", 919 file, line, rc); 920 } 921 922 void 923 rf_print_unable_to_add_shutdown(const char *file, int line, int rc) 924 { 925 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", 926 file, line, rc); 927 } 928 929 static void 930 rf_alloc_mutex_cond(RF_Raid_t *raidPtr) 931 { 932 933 rf_init_mutex2(raidPtr->mutex, IPL_VM); 934 935 rf_init_cond2(raidPtr->outstandingCond, "rfocond"); 936 rf_init_cond2(raidPtr->parity_rewrite_cv, "rfprwshutdown"); 937 rf_init_mutex2(raidPtr->rad_lock, IPL_VM); 938 939 rf_init_mutex2(raidPtr->access_suspend_mutex, IPL_VM); 940 rf_init_cond2(raidPtr->access_suspend_cv, "rfquiesce"); 941 942 rf_init_cond2(raidPtr->waitForReconCond, "rfrcnw"); 943 944 rf_init_cond2(raidPtr->adding_hot_spare_cv, "raidhs"); 945 } 946 947 static void 948 rf_destroy_mutex_cond(RF_Raid_t *raidPtr) 949 { 950 951 rf_destroy_cond2(raidPtr->waitForReconCond); 952 rf_destroy_cond2(raidPtr->adding_hot_spare_cv); 953 954 rf_destroy_mutex2(raidPtr->access_suspend_mutex); 955 rf_destroy_cond2(raidPtr->access_suspend_cv); 956 957 rf_destroy_cond2(raidPtr->parity_rewrite_cv); 958 rf_destroy_cond2(raidPtr->outstandingCond); 959 rf_destroy_mutex2(raidPtr->rad_lock); 960 961 rf_destroy_mutex2(raidPtr->mutex); 962 } 963