1 /* $NetBSD: rf_driver.c,v 1.136 2019/10/10 03:43:59 christos 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 1.136 2019/10/10 03:43:59 christos 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; 303 304 rf_lock_mutex2(configureMutex); 305 configureCount++; 306 if (isconfigged == 0) { 307 rf_init_mutex2(rf_printf_mutex, IPL_VM); 308 309 /* initialize globals */ 310 311 DO_INIT_CONFIGURE(rf_ConfigureAllocList); 312 313 /* 314 * Yes, this does make debugging general to the whole 315 * system instead of being array specific. Bummer, drag. 316 */ 317 rf_ConfigureDebug(cfgPtr); 318 DO_INIT_CONFIGURE(rf_ConfigureDebugMem); 319 #if RF_ACC_TRACE > 0 320 DO_INIT_CONFIGURE(rf_ConfigureAccessTrace); 321 #endif 322 DO_INIT_CONFIGURE(rf_ConfigureMapModule); 323 DO_INIT_CONFIGURE(rf_ConfigureReconEvent); 324 DO_INIT_CONFIGURE(rf_ConfigureCallback); 325 DO_INIT_CONFIGURE(rf_ConfigureRDFreeList); 326 DO_INIT_CONFIGURE(rf_ConfigureNWayXor); 327 DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList); 328 DO_INIT_CONFIGURE(rf_ConfigureMCPair); 329 DO_INIT_CONFIGURE(rf_ConfigureDAGs); 330 DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs); 331 DO_INIT_CONFIGURE(rf_ConfigureReconstruction); 332 DO_INIT_CONFIGURE(rf_ConfigureCopyback); 333 DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem); 334 DO_INIT_CONFIGURE(rf_ConfigurePSStatus); 335 isconfigged = 1; 336 } 337 rf_unlock_mutex2(configureMutex); 338 339 rf_alloc_mutex_cond(raidPtr); 340 341 /* set up the cleanup list. Do this after ConfigureDebug so that 342 * value of memDebug will be set */ 343 344 rf_MakeAllocList(raidPtr->cleanupList); 345 if (raidPtr->cleanupList == NULL) { 346 DO_RAID_FAIL(); 347 return (ENOMEM); 348 } 349 rf_ShutdownCreate(&raidPtr->shutdownList, 350 (void (*) (void *)) rf_FreeAllocList, 351 raidPtr->cleanupList); 352 353 raidPtr->numCol = cfgPtr->numCol; 354 raidPtr->numSpare = cfgPtr->numSpare; 355 356 raidPtr->status = rf_rs_optimal; 357 raidPtr->reconControl = NULL; 358 359 DO_RAID_INIT_CONFIGURE(rf_ConfigureEngine); 360 DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLocks); 361 362 raidPtr->nAccOutstanding = 0; 363 raidPtr->waitShutdown = 0; 364 365 if (ac!=NULL) { 366 /* We have an AutoConfig structure.. Don't do the 367 normal disk configuration... call the auto config 368 stuff */ 369 rf_AutoConfigureDisks(raidPtr, cfgPtr, ac); 370 } else { 371 DO_RAID_INIT_CONFIGURE(rf_ConfigureDisks); 372 DO_RAID_INIT_CONFIGURE(rf_ConfigureSpareDisks); 373 } 374 /* do this after ConfigureDisks & ConfigureSpareDisks to be sure dev 375 * no. is set */ 376 DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueues); 377 378 DO_RAID_INIT_CONFIGURE(rf_ConfigureLayout); 379 380 /* Initialize per-RAID PSS bits */ 381 rf_InitPSStatus(raidPtr); 382 383 #if RF_INCLUDE_CHAINDECLUSTER > 0 384 for (col = 0; col < raidPtr->numCol; col++) { 385 /* 386 * XXX better distribution 387 */ 388 raidPtr->hist_diskreq[col] = 0; 389 } 390 #endif 391 raidPtr->numNewFailures = 0; 392 raidPtr->copyback_in_progress = 0; 393 raidPtr->parity_rewrite_in_progress = 0; 394 raidPtr->adding_hot_spare = 0; 395 raidPtr->recon_in_progress = 0; 396 397 raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs; 398 399 /* autoconfigure and root_partition will actually get filled in 400 after the config is done */ 401 raidPtr->autoconfigure = 0; 402 raidPtr->root_partition = 0; 403 raidPtr->last_unit = raidPtr->raidid; 404 raidPtr->config_order = 0; 405 406 if (rf_keepAccTotals) { 407 raidPtr->keep_acc_totals = 1; 408 } 409 410 /* Allocate a bunch of buffers to be used in low-memory conditions */ 411 raidPtr->iobuf = NULL; 412 413 rc = rf_AllocEmergBuffers(raidPtr); 414 if (rc) { 415 printf("raid%d: Unable to allocate emergency buffers.\n", 416 raidPtr->raidid); 417 DO_RAID_FAIL(); 418 return(rc); 419 } 420 421 /* Set up parity map stuff, if applicable. */ 422 #ifndef RF_NO_PARITY_MAP 423 rf_paritymap_attach(raidPtr, cfgPtr->force); 424 #endif 425 426 raidPtr->valid = 1; 427 428 printf("raid%d: %s\n", raidPtr->raidid, 429 raidPtr->Layout.map->configName); 430 printf("raid%d: Components:", raidPtr->raidid); 431 432 for (col = 0; col < raidPtr->numCol; col++) { 433 printf(" %s", raidPtr->Disks[col].devname); 434 if (RF_DEAD_DISK(raidPtr->Disks[col].status)) { 435 printf("[**FAILED**]"); 436 } 437 } 438 printf("\n"); 439 printf("raid%d: Total Sectors: %" PRIu64 " (%" PRIu64 " MB)\n", 440 raidPtr->raidid, 441 raidPtr->totalSectors, 442 (raidPtr->totalSectors / 1024 * 443 (1 << raidPtr->logBytesPerSector) / 1024)); 444 445 return (0); 446 } 447 448 449 /* 450 451 Routines to allocate and free the "emergency buffers" for a given 452 RAID set. These emergency buffers will be used when the kernel runs 453 out of kernel memory. 454 455 */ 456 457 static int 458 rf_AllocEmergBuffers(RF_Raid_t *raidPtr) 459 { 460 void *tmpbuf; 461 RF_VoidPointerListElem_t *vple; 462 int i; 463 464 /* XXX next line needs tuning... */ 465 raidPtr->numEmergencyBuffers = 10 * raidPtr->numCol; 466 #if DEBUG 467 printf("raid%d: allocating %d buffers of %d bytes.\n", 468 raidPtr->raidid, 469 raidPtr->numEmergencyBuffers, 470 (int)(raidPtr->Layout.sectorsPerStripeUnit << 471 raidPtr->logBytesPerSector)); 472 #endif 473 for (i = 0; i < raidPtr->numEmergencyBuffers; i++) { 474 tmpbuf = malloc( raidPtr->Layout.sectorsPerStripeUnit << 475 raidPtr->logBytesPerSector, 476 M_RAIDFRAME, M_WAITOK); 477 if (tmpbuf) { 478 vple = rf_AllocVPListElem(); 479 vple->p= tmpbuf; 480 vple->next = raidPtr->iobuf; 481 raidPtr->iobuf = vple; 482 raidPtr->iobuf_count++; 483 } else { 484 printf("raid%d: failed to allocate emergency buffer!\n", 485 raidPtr->raidid); 486 return 1; 487 } 488 } 489 490 /* XXX next line needs tuning too... */ 491 raidPtr->numEmergencyStripeBuffers = 10; 492 for (i = 0; i < raidPtr->numEmergencyStripeBuffers; i++) { 493 tmpbuf = malloc( raidPtr->numCol * (raidPtr->Layout.sectorsPerStripeUnit << 494 raidPtr->logBytesPerSector), 495 M_RAIDFRAME, M_WAITOK); 496 if (tmpbuf) { 497 vple = rf_AllocVPListElem(); 498 vple->p= tmpbuf; 499 vple->next = raidPtr->stripebuf; 500 raidPtr->stripebuf = vple; 501 raidPtr->stripebuf_count++; 502 } else { 503 printf("raid%d: failed to allocate emergency stripe buffer!\n", 504 raidPtr->raidid); 505 return 1; 506 } 507 } 508 509 return (0); 510 } 511 512 static void 513 rf_FreeEmergBuffers(RF_Raid_t *raidPtr) 514 { 515 RF_VoidPointerListElem_t *tmp; 516 517 /* Free the emergency IO buffers */ 518 while (raidPtr->iobuf != NULL) { 519 tmp = raidPtr->iobuf; 520 raidPtr->iobuf = raidPtr->iobuf->next; 521 free(tmp->p, M_RAIDFRAME); 522 rf_FreeVPListElem(tmp); 523 } 524 525 /* Free the emergency stripe buffers */ 526 while (raidPtr->stripebuf != NULL) { 527 tmp = raidPtr->stripebuf; 528 raidPtr->stripebuf = raidPtr->stripebuf->next; 529 free(tmp->p, M_RAIDFRAME); 530 rf_FreeVPListElem(tmp); 531 } 532 } 533 534 535 static void 536 rf_ShutdownRDFreeList(void *ignored) 537 { 538 pool_destroy(&rf_pools.rad); 539 } 540 541 static int 542 rf_ConfigureRDFreeList(RF_ShutdownList_t **listp) 543 { 544 545 rf_pool_init(&rf_pools.rad, sizeof(RF_RaidAccessDesc_t), 546 "rf_rad_pl", RF_MIN_FREE_RAD, RF_MAX_FREE_RAD); 547 rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, NULL); 548 return (0); 549 } 550 551 RF_RaidAccessDesc_t * 552 rf_AllocRaidAccDesc(RF_Raid_t *raidPtr, RF_IoType_t type, 553 RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 554 void *bufPtr, void *bp, RF_RaidAccessFlags_t flags, 555 const RF_AccessState_t *states) 556 { 557 RF_RaidAccessDesc_t *desc; 558 559 desc = pool_get(&rf_pools.rad, PR_WAITOK); 560 561 rf_lock_mutex2(raidPtr->rad_lock); 562 if (raidPtr->waitShutdown) { 563 /* 564 * Actually, we're shutting the array down. Free the desc 565 * and return NULL. 566 */ 567 568 rf_unlock_mutex2(raidPtr->rad_lock); 569 pool_put(&rf_pools.rad, desc); 570 return (NULL); 571 } 572 raidPtr->nAccOutstanding++; 573 574 rf_unlock_mutex2(raidPtr->rad_lock); 575 576 desc->raidPtr = (void *) raidPtr; 577 desc->type = type; 578 desc->raidAddress = raidAddress; 579 desc->numBlocks = numBlocks; 580 desc->bufPtr = bufPtr; 581 desc->bp = bp; 582 desc->flags = flags; 583 desc->states = states; 584 desc->state = 0; 585 desc->dagList = NULL; 586 587 desc->status = 0; 588 desc->numRetries = 0; 589 #if RF_ACC_TRACE > 0 590 memset(&desc->tracerec, 0, sizeof(desc->tracerec)); 591 #endif 592 desc->callbackFunc = NULL; 593 desc->callbackArg = NULL; 594 desc->next = NULL; 595 desc->iobufs = NULL; 596 desc->stripebufs = NULL; 597 598 return (desc); 599 } 600 601 void 602 rf_FreeRaidAccDesc(RF_RaidAccessDesc_t *desc) 603 { 604 RF_Raid_t *raidPtr = desc->raidPtr; 605 RF_DagList_t *dagList, *temp; 606 RF_VoidPointerListElem_t *tmp; 607 608 RF_ASSERT(desc); 609 610 /* Cleanup the dagList(s) */ 611 dagList = desc->dagList; 612 while(dagList != NULL) { 613 temp = dagList; 614 dagList = dagList->next; 615 rf_FreeDAGList(temp); 616 } 617 618 while (desc->iobufs) { 619 tmp = desc->iobufs; 620 desc->iobufs = desc->iobufs->next; 621 rf_FreeIOBuffer(raidPtr, tmp); 622 } 623 624 while (desc->stripebufs) { 625 tmp = desc->stripebufs; 626 desc->stripebufs = desc->stripebufs->next; 627 rf_FreeStripeBuffer(raidPtr, tmp); 628 } 629 630 pool_put(&rf_pools.rad, desc); 631 rf_lock_mutex2(raidPtr->rad_lock); 632 raidPtr->nAccOutstanding--; 633 if (raidPtr->waitShutdown) { 634 rf_signal_cond2(raidPtr->outstandingCond); 635 } 636 rf_unlock_mutex2(raidPtr->rad_lock); 637 } 638 /********************************************************************* 639 * Main routine for performing an access. 640 * Accesses are retried until a DAG can not be selected. This occurs 641 * when either the DAG library is incomplete or there are too many 642 * failures in a parity group. 643 * 644 * type should be read or write async_flag should be RF_TRUE or 645 * RF_FALSE bp_in is a buf pointer. void *to facilitate ignoring it 646 * outside the kernel 647 ********************************************************************/ 648 int 649 rf_DoAccess(RF_Raid_t * raidPtr, RF_IoType_t type, int async_flag, 650 RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 651 void *bufPtr, struct buf *bp, RF_RaidAccessFlags_t flags) 652 { 653 RF_RaidAccessDesc_t *desc; 654 void *lbufPtr = bufPtr; 655 656 raidAddress += rf_raidSectorOffset; 657 658 #if RF_ACCESS_DEBUG 659 if (rf_accessDebug) { 660 661 printf("logBytes is: %d %d %d\n", raidPtr->raidid, 662 raidPtr->logBytesPerSector, 663 (int) rf_RaidAddressToByte(raidPtr, numBlocks)); 664 printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n", raidPtr->raidid, 665 (type == RF_IO_TYPE_READ) ? "READ" : "WRITE", (int) raidAddress, 666 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress), 667 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress + numBlocks - 1), 668 (int) numBlocks, 669 (int) rf_RaidAddressToByte(raidPtr, numBlocks), 670 (long) bufPtr); 671 } 672 #endif 673 674 desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress, 675 numBlocks, lbufPtr, bp, flags, raidPtr->Layout.map->states); 676 677 if (desc == NULL) { 678 return (ENOMEM); 679 } 680 #if RF_ACC_TRACE > 0 681 RF_ETIMER_START(desc->tracerec.tot_timer); 682 #endif 683 desc->async_flag = async_flag; 684 685 if (raidPtr->parity_map != NULL && 686 type == RF_IO_TYPE_WRITE) 687 rf_paritymap_begin(raidPtr->parity_map, raidAddress, 688 numBlocks); 689 690 rf_ContinueRaidAccess(desc); 691 692 return (0); 693 } 694 #if 0 695 /* force the array into reconfigured mode without doing reconstruction */ 696 int 697 rf_SetReconfiguredMode(RF_Raid_t *raidPtr, int col) 698 { 699 if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) { 700 printf("Can't set reconfigured mode in dedicated-spare array\n"); 701 RF_PANIC(); 702 } 703 rf_lock_mutex2(raidPtr->mutex); 704 raidPtr->numFailures++; 705 raidPtr->Disks[col].status = rf_ds_dist_spared; 706 raidPtr->status = rf_rs_reconfigured; 707 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 708 /* install spare table only if declustering + distributed sparing 709 * architecture. */ 710 if (raidPtr->Layout.map->flags & RF_BD_DECLUSTERED) 711 rf_InstallSpareTable(raidPtr, col); 712 rf_unlock_mutex2(raidPtr->mutex); 713 return (0); 714 } 715 #endif 716 717 int 718 rf_FailDisk(RF_Raid_t *raidPtr, int fcol, int initRecon) 719 { 720 721 /* need to suspend IO's here -- if there are DAGs in flight 722 and we pull the rug out from under ci_vp, Bad Things 723 can happen. */ 724 725 rf_SuspendNewRequestsAndWait(raidPtr); 726 727 rf_lock_mutex2(raidPtr->mutex); 728 if (raidPtr->Disks[fcol].status != rf_ds_failed) { 729 /* must be failing something that is valid, or else it's 730 already marked as failed (in which case we don't 731 want to mark it failed again!) */ 732 raidPtr->numFailures++; 733 raidPtr->Disks[fcol].status = rf_ds_failed; 734 raidPtr->status = rf_rs_degraded; 735 } 736 rf_unlock_mutex2(raidPtr->mutex); 737 738 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 739 740 /* Close the component, so that it's not "locked" if someone 741 else want's to use it! */ 742 743 rf_close_component(raidPtr, raidPtr->raid_cinfo[fcol].ci_vp, 744 raidPtr->Disks[fcol].auto_configured); 745 746 rf_lock_mutex2(raidPtr->mutex); 747 raidPtr->raid_cinfo[fcol].ci_vp = NULL; 748 749 /* Need to mark the component as not being auto_configured 750 (in case it was previously). */ 751 752 raidPtr->Disks[fcol].auto_configured = 0; 753 rf_unlock_mutex2(raidPtr->mutex); 754 /* now we can allow IO to continue -- we'll be suspending it 755 again in rf_ReconstructFailedDisk() if we have to.. */ 756 757 rf_ResumeNewRequests(raidPtr); 758 759 if (initRecon) 760 rf_ReconstructFailedDisk(raidPtr, fcol); 761 return (0); 762 } 763 /* releases a thread that is waiting for the array to become quiesced. 764 * access_suspend_mutex should be locked upon calling this 765 */ 766 void 767 rf_SignalQuiescenceLock(RF_Raid_t *raidPtr) 768 { 769 #if RF_DEBUG_QUIESCE 770 if (rf_quiesceDebug) { 771 printf("raid%d: Signalling quiescence lock\n", 772 raidPtr->raidid); 773 } 774 #endif 775 raidPtr->access_suspend_release = 1; 776 777 if (raidPtr->waiting_for_quiescence) { 778 SIGNAL_QUIESCENT_COND(raidPtr); 779 } 780 } 781 /* suspends all new requests to the array. No effect on accesses that are in flight. */ 782 int 783 rf_SuspendNewRequestsAndWait(RF_Raid_t *raidPtr) 784 { 785 #if RF_DEBUG_QUIESCE 786 if (rf_quiesceDebug) 787 printf("raid%d: Suspending new reqs\n", raidPtr->raidid); 788 #endif 789 rf_lock_mutex2(raidPtr->access_suspend_mutex); 790 raidPtr->accesses_suspended++; 791 raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1; 792 793 if (raidPtr->waiting_for_quiescence) { 794 raidPtr->access_suspend_release = 0; 795 while (!raidPtr->access_suspend_release) { 796 #if RF_DEBUG_QUIESCE 797 printf("raid%d: Suspending: Waiting for Quiescence\n", 798 raidPtr->raidid); 799 #endif 800 WAIT_FOR_QUIESCENCE(raidPtr); 801 raidPtr->waiting_for_quiescence = 0; 802 } 803 } 804 #if RF_DEBUG_QUIESCE 805 printf("raid%d: Quiescence reached..\n", raidPtr->raidid); 806 #endif 807 808 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 809 return (raidPtr->waiting_for_quiescence); 810 } 811 /* wake up everyone waiting for quiescence to be released */ 812 void 813 rf_ResumeNewRequests(RF_Raid_t *raidPtr) 814 { 815 RF_CallbackFuncDesc_t *t, *cb; 816 817 #if RF_DEBUG_QUIESCE 818 if (rf_quiesceDebug) 819 printf("raid%d: Resuming new requests\n", raidPtr->raidid); 820 #endif 821 822 rf_lock_mutex2(raidPtr->access_suspend_mutex); 823 raidPtr->accesses_suspended--; 824 if (raidPtr->accesses_suspended == 0) 825 cb = raidPtr->quiesce_wait_list; 826 else 827 cb = NULL; 828 raidPtr->quiesce_wait_list = NULL; 829 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 830 831 while (cb) { 832 t = cb; 833 cb = cb->next; 834 (t->callbackFunc) (t->callbackArg); 835 rf_FreeCallbackFuncDesc(t); 836 } 837 } 838 /***************************************************************************************** 839 * 840 * debug routines 841 * 842 ****************************************************************************************/ 843 844 static void 845 set_debug_option(char *name, long val) 846 { 847 RF_DebugName_t *p; 848 849 for (p = rf_debugNames; p->name; p++) { 850 if (!strcmp(p->name, name)) { 851 *(p->ptr) = val; 852 printf("[Set debug variable %s to %ld]\n", name, val); 853 return; 854 } 855 } 856 RF_ERRORMSG1("Unknown debug string \"%s\"\n", name); 857 } 858 859 860 /* would like to use sscanf here, but apparently not available in kernel */ 861 /*ARGSUSED*/ 862 static void 863 rf_ConfigureDebug(RF_Config_t *cfgPtr) 864 { 865 char *val_p, *name_p, *white_p; 866 long val; 867 int i; 868 869 rf_ResetDebugOptions(); 870 for (i = 0; i < RF_MAXDBGV && cfgPtr->debugVars[i][0]; i++) { 871 name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]); 872 white_p = rf_find_white(name_p); /* skip to start of 2nd 873 * word */ 874 val_p = rf_find_non_white(white_p); 875 if (*val_p == '0' && *(val_p + 1) == 'x') 876 val = rf_htoi(val_p + 2); 877 else 878 val = rf_atoi(val_p); 879 *white_p = '\0'; 880 set_debug_option(name_p, val); 881 } 882 } 883 884 void 885 rf_print_panic_message(int line, const char *file) 886 { 887 kern_assert("raidframe error at line %d file %s", line, file); 888 } 889 890 #ifdef RAID_DIAGNOSTIC 891 void 892 rf_print_assert_panic_message(int line, const char *file, const char *condition) 893 { 894 kern_assert("raidframe error at line %d file %s (failed asserting %s)\n", 895 line, file, condition); 896 } 897 #endif 898 899 void 900 rf_print_unable_to_init_mutex(const char *file, int line, int rc) 901 { 902 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", 903 file, line, rc); 904 } 905 906 void 907 rf_print_unable_to_add_shutdown(const char *file, int line, int rc) 908 { 909 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", 910 file, line, rc); 911 } 912 913 static void 914 rf_alloc_mutex_cond(RF_Raid_t *raidPtr) 915 { 916 917 rf_init_mutex2(raidPtr->mutex, IPL_VM); 918 919 rf_init_cond2(raidPtr->outstandingCond, "rfocond"); 920 rf_init_cond2(raidPtr->parity_rewrite_cv, "rfprwshutdown"); 921 rf_init_mutex2(raidPtr->rad_lock, IPL_VM); 922 923 rf_init_mutex2(raidPtr->access_suspend_mutex, IPL_VM); 924 rf_init_cond2(raidPtr->access_suspend_cv, "rfquiesce"); 925 926 rf_init_cond2(raidPtr->waitForReconCond, "rfrcnw"); 927 928 rf_init_cond2(raidPtr->adding_hot_spare_cv, "raidhs"); 929 } 930 931 static void 932 rf_destroy_mutex_cond(RF_Raid_t *raidPtr) 933 { 934 935 rf_destroy_cond2(raidPtr->waitForReconCond); 936 rf_destroy_cond2(raidPtr->adding_hot_spare_cv); 937 938 rf_destroy_mutex2(raidPtr->access_suspend_mutex); 939 rf_destroy_cond2(raidPtr->access_suspend_cv); 940 941 rf_destroy_cond2(raidPtr->parity_rewrite_cv); 942 rf_destroy_cond2(raidPtr->outstandingCond); 943 rf_destroy_mutex2(raidPtr->rad_lock); 944 945 rf_destroy_mutex2(raidPtr->mutex); 946 } 947