1 /* $NetBSD: rf_driver.c,v 1.133 2016/12/10 23:03:27 maya 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 1.133 2016/12/10 23:03:27 maya 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 rf_unlock_mutex2(raidPtr->rad_lock); 231 232 /* Wait for any parity re-writes to stop... */ 233 while (raidPtr->parity_rewrite_in_progress) { 234 printf("raid%d: Waiting for parity re-write to exit...\n", 235 raidPtr->raidid); 236 tsleep(&raidPtr->parity_rewrite_in_progress, PRIBIO, 237 "rfprwshutdown", 0); 238 } 239 240 /* Wait for any reconstruction to stop... */ 241 rf_lock_mutex2(raidPtr->mutex); 242 while (raidPtr->reconInProgress) { 243 printf("raid%d: Waiting for reconstruction to stop...\n", 244 raidPtr->raidid); 245 rf_wait_cond2(raidPtr->waitForReconCond, raidPtr->mutex); 246 } 247 rf_unlock_mutex2(raidPtr->mutex); 248 249 raidPtr->valid = 0; 250 251 if (raidPtr->parity_map != NULL) 252 rf_paritymap_detach(raidPtr); 253 254 rf_update_component_labels(raidPtr, RF_FINAL_COMPONENT_UPDATE); 255 256 rf_UnconfigureVnodes(raidPtr); 257 258 rf_FreeEmergBuffers(raidPtr); 259 260 rf_ShutdownList(&raidPtr->shutdownList); 261 262 rf_destroy_mutex_cond(raidPtr); 263 264 rf_UnconfigureArray(); 265 266 return (0); 267 } 268 269 270 #define DO_INIT_CONFIGURE(f) { \ 271 rc = f (&globalShutdown); \ 272 if (rc) { \ 273 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 274 rf_ShutdownList(&globalShutdown); \ 275 configureCount--; \ 276 rf_unlock_mutex2(configureMutex); \ 277 rf_destroy_mutex2(rf_printf_mutex); \ 278 return(rc); \ 279 } \ 280 } 281 282 #define DO_RAID_FAIL() { \ 283 rf_UnconfigureVnodes(raidPtr); \ 284 rf_FreeEmergBuffers(raidPtr); \ 285 rf_ShutdownList(&raidPtr->shutdownList); \ 286 rf_UnconfigureArray(); \ 287 rf_destroy_mutex_cond(raidPtr); \ 288 } 289 290 #define DO_RAID_INIT_CONFIGURE(f) { \ 291 rc = f (&raidPtr->shutdownList, raidPtr, cfgPtr); \ 292 if (rc) { \ 293 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 294 DO_RAID_FAIL(); \ 295 return(rc); \ 296 } \ 297 } 298 299 int 300 rf_Configure(RF_Raid_t *raidPtr, RF_Config_t *cfgPtr, RF_AutoConfig_t *ac) 301 { 302 RF_RowCol_t col; 303 int rc; 304 305 rf_lock_mutex2(configureMutex); 306 configureCount++; 307 if (isconfigged == 0) { 308 rf_init_mutex2(rf_printf_mutex, IPL_VM); 309 310 /* initialize globals */ 311 312 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_ConfigureMapModule); 324 DO_INIT_CONFIGURE(rf_ConfigureReconEvent); 325 DO_INIT_CONFIGURE(rf_ConfigureCallback); 326 DO_INIT_CONFIGURE(rf_ConfigureRDFreeList); 327 DO_INIT_CONFIGURE(rf_ConfigureNWayXor); 328 DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList); 329 DO_INIT_CONFIGURE(rf_ConfigureMCPair); 330 DO_INIT_CONFIGURE(rf_ConfigureDAGs); 331 DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs); 332 DO_INIT_CONFIGURE(rf_ConfigureReconstruction); 333 DO_INIT_CONFIGURE(rf_ConfigureCopyback); 334 DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem); 335 DO_INIT_CONFIGURE(rf_ConfigurePSStatus); 336 isconfigged = 1; 337 } 338 rf_unlock_mutex2(configureMutex); 339 340 rf_alloc_mutex_cond(raidPtr); 341 342 /* set up the cleanup list. Do this after ConfigureDebug so that 343 * value of memDebug will be set */ 344 345 rf_MakeAllocList(raidPtr->cleanupList); 346 if (raidPtr->cleanupList == NULL) { 347 DO_RAID_FAIL(); 348 return (ENOMEM); 349 } 350 rf_ShutdownCreate(&raidPtr->shutdownList, 351 (void (*) (void *)) rf_FreeAllocList, 352 raidPtr->cleanupList); 353 354 raidPtr->numCol = cfgPtr->numCol; 355 raidPtr->numSpare = cfgPtr->numSpare; 356 357 raidPtr->status = rf_rs_optimal; 358 raidPtr->reconControl = NULL; 359 360 DO_RAID_INIT_CONFIGURE(rf_ConfigureEngine); 361 DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLocks); 362 363 raidPtr->nAccOutstanding = 0; 364 raidPtr->waitShutdown = 0; 365 366 if (ac!=NULL) { 367 /* We have an AutoConfig structure.. Don't do the 368 normal disk configuration... call the auto config 369 stuff */ 370 rf_AutoConfigureDisks(raidPtr, cfgPtr, ac); 371 } else { 372 DO_RAID_INIT_CONFIGURE(rf_ConfigureDisks); 373 DO_RAID_INIT_CONFIGURE(rf_ConfigureSpareDisks); 374 } 375 /* do this after ConfigureDisks & ConfigureSpareDisks to be sure dev 376 * no. is set */ 377 DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueues); 378 379 DO_RAID_INIT_CONFIGURE(rf_ConfigureLayout); 380 381 /* Initialize per-RAID PSS bits */ 382 rf_InitPSStatus(raidPtr); 383 384 #if RF_INCLUDE_CHAINDECLUSTER > 0 385 for (col = 0; col < raidPtr->numCol; col++) { 386 /* 387 * XXX better distribution 388 */ 389 raidPtr->hist_diskreq[col] = 0; 390 } 391 #endif 392 raidPtr->numNewFailures = 0; 393 raidPtr->copyback_in_progress = 0; 394 raidPtr->parity_rewrite_in_progress = 0; 395 raidPtr->adding_hot_spare = 0; 396 raidPtr->recon_in_progress = 0; 397 398 raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs; 399 400 /* autoconfigure and root_partition will actually get filled in 401 after the config is done */ 402 raidPtr->autoconfigure = 0; 403 raidPtr->root_partition = 0; 404 raidPtr->last_unit = raidPtr->raidid; 405 raidPtr->config_order = 0; 406 407 if (rf_keepAccTotals) { 408 raidPtr->keep_acc_totals = 1; 409 } 410 411 /* Allocate a bunch of buffers to be used in low-memory conditions */ 412 raidPtr->iobuf = NULL; 413 414 rc = rf_AllocEmergBuffers(raidPtr); 415 if (rc) { 416 printf("raid%d: Unable to allocate emergency buffers.\n", 417 raidPtr->raidid); 418 DO_RAID_FAIL(); 419 return(rc); 420 } 421 422 /* Set up parity map stuff, if applicable. */ 423 #ifndef RF_NO_PARITY_MAP 424 rf_paritymap_attach(raidPtr, cfgPtr->force); 425 #endif 426 427 raidPtr->valid = 1; 428 429 printf("raid%d: %s\n", raidPtr->raidid, 430 raidPtr->Layout.map->configName); 431 printf("raid%d: Components:", raidPtr->raidid); 432 433 for (col = 0; col < raidPtr->numCol; col++) { 434 printf(" %s", raidPtr->Disks[col].devname); 435 if (RF_DEAD_DISK(raidPtr->Disks[col].status)) { 436 printf("[**FAILED**]"); 437 } 438 } 439 printf("\n"); 440 printf("raid%d: Total Sectors: %" PRIu64 " (%" PRIu64 " MB)\n", 441 raidPtr->raidid, 442 raidPtr->totalSectors, 443 (raidPtr->totalSectors / 1024 * 444 (1 << raidPtr->logBytesPerSector) / 1024)); 445 446 return (0); 447 } 448 449 450 /* 451 452 Routines to allocate and free the "emergency buffers" for a given 453 RAID set. These emergency buffers will be used when the kernel runs 454 out of kernel memory. 455 456 */ 457 458 static int 459 rf_AllocEmergBuffers(RF_Raid_t *raidPtr) 460 { 461 void *tmpbuf; 462 RF_VoidPointerListElem_t *vple; 463 int i; 464 465 /* XXX next line needs tuning... */ 466 raidPtr->numEmergencyBuffers = 10 * raidPtr->numCol; 467 #if DEBUG 468 printf("raid%d: allocating %d buffers of %d bytes.\n", 469 raidPtr->raidid, 470 raidPtr->numEmergencyBuffers, 471 (int)(raidPtr->Layout.sectorsPerStripeUnit << 472 raidPtr->logBytesPerSector)); 473 #endif 474 for (i = 0; i < raidPtr->numEmergencyBuffers; i++) { 475 tmpbuf = malloc( raidPtr->Layout.sectorsPerStripeUnit << 476 raidPtr->logBytesPerSector, 477 M_RAIDFRAME, M_WAITOK); 478 if (tmpbuf) { 479 vple = rf_AllocVPListElem(); 480 vple->p= tmpbuf; 481 vple->next = raidPtr->iobuf; 482 raidPtr->iobuf = vple; 483 raidPtr->iobuf_count++; 484 } else { 485 printf("raid%d: failed to allocate emergency buffer!\n", 486 raidPtr->raidid); 487 return 1; 488 } 489 } 490 491 /* XXX next line needs tuning too... */ 492 raidPtr->numEmergencyStripeBuffers = 10; 493 for (i = 0; i < raidPtr->numEmergencyStripeBuffers; i++) { 494 tmpbuf = malloc( raidPtr->numCol * (raidPtr->Layout.sectorsPerStripeUnit << 495 raidPtr->logBytesPerSector), 496 M_RAIDFRAME, M_WAITOK); 497 if (tmpbuf) { 498 vple = rf_AllocVPListElem(); 499 vple->p= tmpbuf; 500 vple->next = raidPtr->stripebuf; 501 raidPtr->stripebuf = vple; 502 raidPtr->stripebuf_count++; 503 } else { 504 printf("raid%d: failed to allocate emergency stripe buffer!\n", 505 raidPtr->raidid); 506 return 1; 507 } 508 } 509 510 return (0); 511 } 512 513 static void 514 rf_FreeEmergBuffers(RF_Raid_t *raidPtr) 515 { 516 RF_VoidPointerListElem_t *tmp; 517 518 /* Free the emergency IO buffers */ 519 while (raidPtr->iobuf != NULL) { 520 tmp = raidPtr->iobuf; 521 raidPtr->iobuf = raidPtr->iobuf->next; 522 free(tmp->p, M_RAIDFRAME); 523 rf_FreeVPListElem(tmp); 524 } 525 526 /* Free the emergency stripe buffers */ 527 while (raidPtr->stripebuf != NULL) { 528 tmp = raidPtr->stripebuf; 529 raidPtr->stripebuf = raidPtr->stripebuf->next; 530 free(tmp->p, M_RAIDFRAME); 531 rf_FreeVPListElem(tmp); 532 } 533 } 534 535 536 static void 537 rf_ShutdownRDFreeList(void *ignored) 538 { 539 pool_destroy(&rf_pools.rad); 540 } 541 542 static int 543 rf_ConfigureRDFreeList(RF_ShutdownList_t **listp) 544 { 545 546 rf_pool_init(&rf_pools.rad, sizeof(RF_RaidAccessDesc_t), 547 "rf_rad_pl", RF_MIN_FREE_RAD, RF_MAX_FREE_RAD); 548 rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, NULL); 549 return (0); 550 } 551 552 RF_RaidAccessDesc_t * 553 rf_AllocRaidAccDesc(RF_Raid_t *raidPtr, RF_IoType_t type, 554 RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 555 void *bufPtr, void *bp, RF_RaidAccessFlags_t flags, 556 const RF_AccessState_t *states) 557 { 558 RF_RaidAccessDesc_t *desc; 559 560 desc = pool_get(&rf_pools.rad, PR_WAITOK); 561 562 rf_lock_mutex2(raidPtr->rad_lock); 563 if (raidPtr->waitShutdown) { 564 /* 565 * Actually, we're shutting the array down. Free the desc 566 * and return NULL. 567 */ 568 569 rf_unlock_mutex2(raidPtr->rad_lock); 570 pool_put(&rf_pools.rad, desc); 571 return (NULL); 572 } 573 raidPtr->nAccOutstanding++; 574 575 rf_unlock_mutex2(raidPtr->rad_lock); 576 577 desc->raidPtr = (void *) raidPtr; 578 desc->type = type; 579 desc->raidAddress = raidAddress; 580 desc->numBlocks = numBlocks; 581 desc->bufPtr = bufPtr; 582 desc->bp = bp; 583 desc->flags = flags; 584 desc->states = states; 585 desc->state = 0; 586 desc->dagList = NULL; 587 588 desc->status = 0; 589 desc->numRetries = 0; 590 #if RF_ACC_TRACE > 0 591 memset((char *) &desc->tracerec, 0, sizeof(RF_AccTraceEntry_t)); 592 #endif 593 desc->callbackFunc = NULL; 594 desc->callbackArg = NULL; 595 desc->next = NULL; 596 desc->iobufs = NULL; 597 desc->stripebufs = NULL; 598 599 return (desc); 600 } 601 602 void 603 rf_FreeRaidAccDesc(RF_RaidAccessDesc_t *desc) 604 { 605 RF_Raid_t *raidPtr = desc->raidPtr; 606 RF_DagList_t *dagList, *temp; 607 RF_VoidPointerListElem_t *tmp; 608 609 RF_ASSERT(desc); 610 611 /* Cleanup the dagList(s) */ 612 dagList = desc->dagList; 613 while(dagList != NULL) { 614 temp = dagList; 615 dagList = dagList->next; 616 rf_FreeDAGList(temp); 617 } 618 619 while (desc->iobufs) { 620 tmp = desc->iobufs; 621 desc->iobufs = desc->iobufs->next; 622 rf_FreeIOBuffer(raidPtr, tmp); 623 } 624 625 while (desc->stripebufs) { 626 tmp = desc->stripebufs; 627 desc->stripebufs = desc->stripebufs->next; 628 rf_FreeStripeBuffer(raidPtr, tmp); 629 } 630 631 pool_put(&rf_pools.rad, desc); 632 rf_lock_mutex2(raidPtr->rad_lock); 633 raidPtr->nAccOutstanding--; 634 if (raidPtr->waitShutdown) { 635 rf_signal_cond2(raidPtr->outstandingCond); 636 } 637 rf_unlock_mutex2(raidPtr->rad_lock); 638 } 639 /********************************************************************* 640 * Main routine for performing an access. 641 * Accesses are retried until a DAG can not be selected. This occurs 642 * when either the DAG library is incomplete or there are too many 643 * failures in a parity group. 644 * 645 * type should be read or write async_flag should be RF_TRUE or 646 * RF_FALSE bp_in is a buf pointer. void *to facilitate ignoring it 647 * outside the kernel 648 ********************************************************************/ 649 int 650 rf_DoAccess(RF_Raid_t * raidPtr, RF_IoType_t type, int async_flag, 651 RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, 652 void *bufPtr, struct buf *bp, RF_RaidAccessFlags_t flags) 653 { 654 RF_RaidAccessDesc_t *desc; 655 void *lbufPtr = bufPtr; 656 657 raidAddress += rf_raidSectorOffset; 658 659 #if RF_ACCESS_DEBUG 660 if (rf_accessDebug) { 661 662 printf("logBytes is: %d %d %d\n", raidPtr->raidid, 663 raidPtr->logBytesPerSector, 664 (int) rf_RaidAddressToByte(raidPtr, numBlocks)); 665 printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n", raidPtr->raidid, 666 (type == RF_IO_TYPE_READ) ? "READ" : "WRITE", (int) raidAddress, 667 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress), 668 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress + numBlocks - 1), 669 (int) numBlocks, 670 (int) rf_RaidAddressToByte(raidPtr, numBlocks), 671 (long) bufPtr); 672 } 673 #endif 674 675 desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress, 676 numBlocks, lbufPtr, bp, flags, raidPtr->Layout.map->states); 677 678 if (desc == NULL) { 679 return (ENOMEM); 680 } 681 #if RF_ACC_TRACE > 0 682 RF_ETIMER_START(desc->tracerec.tot_timer); 683 #endif 684 desc->async_flag = async_flag; 685 686 if (raidPtr->parity_map != NULL && 687 type == RF_IO_TYPE_WRITE) 688 rf_paritymap_begin(raidPtr->parity_map, raidAddress, 689 numBlocks); 690 691 rf_ContinueRaidAccess(desc); 692 693 return (0); 694 } 695 #if 0 696 /* force the array into reconfigured mode without doing reconstruction */ 697 int 698 rf_SetReconfiguredMode(RF_Raid_t *raidPtr, int col) 699 { 700 if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) { 701 printf("Can't set reconfigured mode in dedicated-spare array\n"); 702 RF_PANIC(); 703 } 704 rf_lock_mutex2(raidPtr->mutex); 705 raidPtr->numFailures++; 706 raidPtr->Disks[col].status = rf_ds_dist_spared; 707 raidPtr->status = rf_rs_reconfigured; 708 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 709 /* install spare table only if declustering + distributed sparing 710 * architecture. */ 711 if (raidPtr->Layout.map->flags & RF_BD_DECLUSTERED) 712 rf_InstallSpareTable(raidPtr, col); 713 rf_unlock_mutex2(raidPtr->mutex); 714 return (0); 715 } 716 #endif 717 718 int 719 rf_FailDisk(RF_Raid_t *raidPtr, int fcol, int initRecon) 720 { 721 722 /* need to suspend IO's here -- if there are DAGs in flight 723 and we pull the rug out from under ci_vp, Bad Things 724 can happen. */ 725 726 rf_SuspendNewRequestsAndWait(raidPtr); 727 728 rf_lock_mutex2(raidPtr->mutex); 729 if (raidPtr->Disks[fcol].status != rf_ds_failed) { 730 /* must be failing something that is valid, or else it's 731 already marked as failed (in which case we don't 732 want to mark it failed again!) */ 733 raidPtr->numFailures++; 734 raidPtr->Disks[fcol].status = rf_ds_failed; 735 raidPtr->status = rf_rs_degraded; 736 } 737 rf_unlock_mutex2(raidPtr->mutex); 738 739 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 740 741 /* Close the component, so that it's not "locked" if someone 742 else want's to use it! */ 743 744 rf_close_component(raidPtr, raidPtr->raid_cinfo[fcol].ci_vp, 745 raidPtr->Disks[fcol].auto_configured); 746 747 rf_lock_mutex2(raidPtr->mutex); 748 raidPtr->raid_cinfo[fcol].ci_vp = NULL; 749 750 /* Need to mark the component as not being auto_configured 751 (in case it was previously). */ 752 753 raidPtr->Disks[fcol].auto_configured = 0; 754 rf_unlock_mutex2(raidPtr->mutex); 755 /* now we can allow IO to continue -- we'll be suspending it 756 again in rf_ReconstructFailedDisk() if we have to.. */ 757 758 rf_ResumeNewRequests(raidPtr); 759 760 if (initRecon) 761 rf_ReconstructFailedDisk(raidPtr, fcol); 762 return (0); 763 } 764 /* releases a thread that is waiting for the array to become quiesced. 765 * access_suspend_mutex should be locked upon calling this 766 */ 767 void 768 rf_SignalQuiescenceLock(RF_Raid_t *raidPtr) 769 { 770 #if RF_DEBUG_QUIESCE 771 if (rf_quiesceDebug) { 772 printf("raid%d: Signalling quiescence lock\n", 773 raidPtr->raidid); 774 } 775 #endif 776 raidPtr->access_suspend_release = 1; 777 778 if (raidPtr->waiting_for_quiescence) { 779 SIGNAL_QUIESCENT_COND(raidPtr); 780 } 781 } 782 /* suspends all new requests to the array. No effect on accesses that are in flight. */ 783 int 784 rf_SuspendNewRequestsAndWait(RF_Raid_t *raidPtr) 785 { 786 #if RF_DEBUG_QUIESCE 787 if (rf_quiesceDebug) 788 printf("raid%d: Suspending new reqs\n", raidPtr->raidid); 789 #endif 790 rf_lock_mutex2(raidPtr->access_suspend_mutex); 791 raidPtr->accesses_suspended++; 792 raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1; 793 794 if (raidPtr->waiting_for_quiescence) { 795 raidPtr->access_suspend_release = 0; 796 while (!raidPtr->access_suspend_release) { 797 #if RF_DEBUG_QUIESCE 798 printf("raid%d: Suspending: Waiting for Quiescence\n", 799 raidPtr->raidid); 800 #endif 801 WAIT_FOR_QUIESCENCE(raidPtr); 802 raidPtr->waiting_for_quiescence = 0; 803 } 804 } 805 #if RF_DEBUG_QUIESCE 806 printf("raid%d: Quiescence reached..\n", raidPtr->raidid); 807 #endif 808 809 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 810 return (raidPtr->waiting_for_quiescence); 811 } 812 /* wake up everyone waiting for quiescence to be released */ 813 void 814 rf_ResumeNewRequests(RF_Raid_t *raidPtr) 815 { 816 RF_CallbackDesc_t *t, *cb; 817 818 #if RF_DEBUG_QUIESCE 819 if (rf_quiesceDebug) 820 printf("raid%d: Resuming new requests\n", raidPtr->raidid); 821 #endif 822 823 rf_lock_mutex2(raidPtr->access_suspend_mutex); 824 raidPtr->accesses_suspended--; 825 if (raidPtr->accesses_suspended == 0) 826 cb = raidPtr->quiesce_wait_list; 827 else 828 cb = NULL; 829 raidPtr->quiesce_wait_list = NULL; 830 rf_unlock_mutex2(raidPtr->access_suspend_mutex); 831 832 while (cb) { 833 t = cb; 834 cb = cb->next; 835 (t->callbackFunc) (t->callbackArg); 836 rf_FreeCallbackDesc(t); 837 } 838 } 839 /***************************************************************************************** 840 * 841 * debug routines 842 * 843 ****************************************************************************************/ 844 845 static void 846 set_debug_option(char *name, long val) 847 { 848 RF_DebugName_t *p; 849 850 for (p = rf_debugNames; p->name; p++) { 851 if (!strcmp(p->name, name)) { 852 *(p->ptr) = val; 853 printf("[Set debug variable %s to %ld]\n", name, val); 854 return; 855 } 856 } 857 RF_ERRORMSG1("Unknown debug string \"%s\"\n", name); 858 } 859 860 861 /* would like to use sscanf here, but apparently not available in kernel */ 862 /*ARGSUSED*/ 863 static void 864 rf_ConfigureDebug(RF_Config_t *cfgPtr) 865 { 866 char *val_p, *name_p, *white_p; 867 long val; 868 int i; 869 870 rf_ResetDebugOptions(); 871 for (i = 0; i < RF_MAXDBGV && cfgPtr->debugVars[i][0]; i++) { 872 name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]); 873 white_p = rf_find_white(name_p); /* skip to start of 2nd 874 * word */ 875 val_p = rf_find_non_white(white_p); 876 if (*val_p == '0' && *(val_p + 1) == 'x') 877 val = rf_htoi(val_p + 2); 878 else 879 val = rf_atoi(val_p); 880 *white_p = '\0'; 881 set_debug_option(name_p, val); 882 } 883 } 884 885 void 886 rf_print_panic_message(int line, const char *file) 887 { 888 kern_assert("raidframe error at line %d file %s", line, file); 889 } 890 891 #ifdef RAID_DIAGNOSTIC 892 void 893 rf_print_assert_panic_message(int line, const char *file, const char *condition) 894 { 895 kern_assert("raidframe error at line %d file %s (failed asserting %s)\n", 896 line, file, condition); 897 } 898 #endif 899 900 void 901 rf_print_unable_to_init_mutex(const char *file, int line, int rc) 902 { 903 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", 904 file, line, rc); 905 } 906 907 void 908 rf_print_unable_to_add_shutdown(const char *file, int line, int rc) 909 { 910 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", 911 file, line, rc); 912 } 913 914 static void 915 rf_alloc_mutex_cond(RF_Raid_t *raidPtr) 916 { 917 918 rf_init_mutex2(raidPtr->mutex, IPL_VM); 919 920 rf_init_cond2(raidPtr->outstandingCond, "rfocond"); 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->outstandingCond); 942 rf_destroy_mutex2(raidPtr->rad_lock); 943 944 rf_destroy_mutex2(raidPtr->mutex); 945 } 946