1 /* $NetBSD: rf_driver.c,v 1.65 2002/10/18 02:46:36 oster Exp $ */ 2 /*- 3 * Copyright (c) 1999 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Greg Oster 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1995 Carnegie-Mellon University. 40 * All rights reserved. 41 * 42 * Author: Mark Holland, Khalil Amiri, Claudson Bornstein, William V. Courtright II, 43 * Robby Findler, Daniel Stodolsky, Rachad Youssef, Jim Zelenka 44 * 45 * Permission to use, copy, modify and distribute this software and 46 * its documentation is hereby granted, provided that both the copyright 47 * notice and this permission notice appear in all copies of the 48 * software, derivative works or modified versions, and any portions 49 * thereof, and that both notices appear in supporting documentation. 50 * 51 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 52 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 53 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 54 * 55 * Carnegie Mellon requests users of this software to return to 56 * 57 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 58 * School of Computer Science 59 * Carnegie Mellon University 60 * Pittsburgh PA 15213-3890 61 * 62 * any improvements or extensions that they make and grant Carnegie the 63 * rights to redistribute these changes. 64 */ 65 66 /****************************************************************************** 67 * 68 * rf_driver.c -- main setup, teardown, and access routines for the RAID driver 69 * 70 * all routines are prefixed with rf_ (raidframe), to avoid conficts. 71 * 72 ******************************************************************************/ 73 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: rf_driver.c,v 1.65 2002/10/18 02:46:36 oster Exp $"); 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/ioctl.h> 81 #include <sys/fcntl.h> 82 #include <sys/vnode.h> 83 84 85 #include "rf_archs.h" 86 #include "rf_threadstuff.h" 87 88 #include <sys/errno.h> 89 90 #include "rf_raid.h" 91 #include "rf_dag.h" 92 #include "rf_aselect.h" 93 #include "rf_diskqueue.h" 94 #include "rf_parityscan.h" 95 #include "rf_alloclist.h" 96 #include "rf_dagutils.h" 97 #include "rf_utils.h" 98 #include "rf_etimer.h" 99 #include "rf_acctrace.h" 100 #include "rf_general.h" 101 #include "rf_desc.h" 102 #include "rf_states.h" 103 #include "rf_freelist.h" 104 #include "rf_decluster.h" 105 #include "rf_map.h" 106 #include "rf_revent.h" 107 #include "rf_callback.h" 108 #include "rf_engine.h" 109 #include "rf_mcpair.h" 110 #include "rf_nwayxor.h" 111 #include "rf_copyback.h" 112 #include "rf_driver.h" 113 #include "rf_options.h" 114 #include "rf_shutdown.h" 115 #include "rf_kintf.h" 116 117 #include <sys/buf.h> 118 119 #ifndef RF_ACCESS_DEBUG 120 #define RF_ACCESS_DEBUG 0 121 #endif 122 123 /* rad == RF_RaidAccessDesc_t */ 124 static RF_FreeList_t *rf_rad_freelist; 125 #define RF_MAX_FREE_RAD 128 126 #define RF_RAD_INC 16 127 #define RF_RAD_INITIAL 32 128 129 /* debug variables */ 130 char rf_panicbuf[2048]; /* a buffer to hold an error msg when we panic */ 131 132 /* main configuration routines */ 133 static int raidframe_booted = 0; 134 135 static void rf_ConfigureDebug(RF_Config_t * cfgPtr); 136 static void set_debug_option(char *name, long val); 137 static void rf_UnconfigureArray(void); 138 static int init_rad(RF_RaidAccessDesc_t *); 139 static void clean_rad(RF_RaidAccessDesc_t *); 140 static void rf_ShutdownRDFreeList(void *); 141 static int rf_ConfigureRDFreeList(RF_ShutdownList_t **); 142 143 RF_DECLARE_MUTEX(rf_printf_mutex) /* debug only: avoids interleaved 144 * printfs by different stripes */ 145 146 #define SIGNAL_QUIESCENT_COND(_raid_) wakeup(&((_raid_)->accesses_suspended)) 147 #define WAIT_FOR_QUIESCENCE(_raid_) \ 148 ltsleep(&((_raid_)->accesses_suspended), PRIBIO, \ 149 "raidframe quiesce", 0, &((_raid_)->access_suspend_mutex)) 150 151 #define IO_BUF_ERR(bp, err) { \ 152 bp->b_flags |= B_ERROR; \ 153 bp->b_resid = bp->b_bcount; \ 154 bp->b_error = err; \ 155 biodone(bp); \ 156 } 157 158 static int configureCount = 0; /* number of active configurations */ 159 static int isconfigged = 0; /* is basic raidframe (non per-array) 160 * stuff configged */ 161 RF_DECLARE_LKMGR_STATIC_MUTEX(configureMutex) /* used to lock the configuration 162 * stuff */ 163 static RF_ShutdownList_t *globalShutdown; /* non array-specific 164 * stuff */ 165 166 static int rf_ConfigureRDFreeList(RF_ShutdownList_t ** listp); 167 168 /* called at system boot time */ 169 int 170 rf_BootRaidframe() 171 { 172 int rc; 173 174 if (raidframe_booted) 175 return (EBUSY); 176 raidframe_booted = 1; 177 178 rc = rf_lkmgr_mutex_init(&configureMutex); 179 if (rc) { 180 rf_print_unable_to_init_mutex( __FILE__, __LINE__, rc); 181 RF_PANIC(); 182 } 183 configureCount = 0; 184 isconfigged = 0; 185 globalShutdown = NULL; 186 return (0); 187 } 188 189 /* 190 * Called whenever an array is shutdown 191 */ 192 static void 193 rf_UnconfigureArray() 194 { 195 int rc; 196 197 RF_LOCK_LKMGR_MUTEX(configureMutex); 198 if (--configureCount == 0) { /* if no active configurations, shut 199 * everything down */ 200 isconfigged = 0; 201 202 rc = rf_ShutdownList(&globalShutdown); 203 if (rc) { 204 RF_ERRORMSG1("RAIDFRAME: unable to do global shutdown, rc=%d\n", rc); 205 } 206 207 /* 208 * We must wait until now, because the AllocList module 209 * uses the DebugMem module. 210 */ 211 #if RF_DEBUG_MEM 212 if (rf_memDebug) 213 rf_print_unfreed(); 214 #endif 215 } 216 RF_UNLOCK_LKMGR_MUTEX(configureMutex); 217 } 218 219 /* 220 * Called to shut down an array. 221 */ 222 int 223 rf_Shutdown(raidPtr) 224 RF_Raid_t *raidPtr; 225 { 226 227 if (!raidPtr->valid) { 228 RF_ERRORMSG("Attempt to shut down unconfigured RAIDframe driver. Aborting shutdown\n"); 229 return (EINVAL); 230 } 231 /* 232 * wait for outstanding IOs to land 233 * As described in rf_raid.h, we use the rad_freelist lock 234 * to protect the per-array info about outstanding descs 235 * since we need to do freelist locking anyway, and this 236 * cuts down on the amount of serialization we've got going 237 * on. 238 */ 239 RF_FREELIST_DO_LOCK(rf_rad_freelist); 240 if (raidPtr->waitShutdown) { 241 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 242 return (EBUSY); 243 } 244 raidPtr->waitShutdown = 1; 245 while (raidPtr->nAccOutstanding) { 246 RF_WAIT_COND(raidPtr->outstandingCond, RF_FREELIST_MUTEX_OF(rf_rad_freelist)); 247 } 248 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 249 250 /* Wait for any parity re-writes to stop... */ 251 while (raidPtr->parity_rewrite_in_progress) { 252 printf("Waiting for parity re-write to exit...\n"); 253 tsleep(&raidPtr->parity_rewrite_in_progress, PRIBIO, 254 "rfprwshutdown", 0); 255 } 256 257 raidPtr->valid = 0; 258 259 rf_update_component_labels(raidPtr, RF_FINAL_COMPONENT_UPDATE); 260 261 rf_UnconfigureVnodes(raidPtr); 262 263 rf_ShutdownList(&raidPtr->shutdownList); 264 265 rf_UnconfigureArray(); 266 267 return (0); 268 } 269 270 271 #define DO_INIT_CONFIGURE(f) { \ 272 rc = f (&globalShutdown); \ 273 if (rc) { \ 274 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 275 rf_ShutdownList(&globalShutdown); \ 276 configureCount--; \ 277 RF_UNLOCK_LKMGR_MUTEX(configureMutex); \ 278 return(rc); \ 279 } \ 280 } 281 282 #define DO_RAID_FAIL() { \ 283 rf_UnconfigureVnodes(raidPtr); \ 284 rf_ShutdownList(&raidPtr->shutdownList); \ 285 rf_UnconfigureArray(); \ 286 } 287 288 #define DO_RAID_INIT_CONFIGURE(f) { \ 289 rc = f (&raidPtr->shutdownList, raidPtr, cfgPtr); \ 290 if (rc) { \ 291 RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ 292 DO_RAID_FAIL(); \ 293 return(rc); \ 294 } \ 295 } 296 297 #define DO_RAID_MUTEX(_m_) { \ 298 rc = rf_create_managed_mutex(&raidPtr->shutdownList, (_m_)); \ 299 if (rc) { \ 300 rf_print_unable_to_init_mutex(__FILE__, __LINE__, rc); \ 301 DO_RAID_FAIL(); \ 302 return(rc); \ 303 } \ 304 } 305 306 #define DO_RAID_COND(_c_) { \ 307 rc = rf_create_managed_cond(&raidPtr->shutdownList, (_c_)); \ 308 if (rc) { \ 309 rf_print_unable_to_init_cond(__FILE__, __LINE__, rc); \ 310 DO_RAID_FAIL(); \ 311 return(rc); \ 312 } \ 313 } 314 315 int 316 rf_Configure(raidPtr, cfgPtr, ac) 317 RF_Raid_t *raidPtr; 318 RF_Config_t *cfgPtr; 319 RF_AutoConfig_t *ac; 320 { 321 RF_RowCol_t row, col; 322 int i, rc; 323 324 RF_LOCK_LKMGR_MUTEX(configureMutex); 325 configureCount++; 326 if (isconfigged == 0) { 327 rc = rf_create_managed_mutex(&globalShutdown, &rf_printf_mutex); 328 if (rc) { 329 rf_print_unable_to_init_mutex(__FILE__, __LINE__, rc); 330 rf_ShutdownList(&globalShutdown); 331 return (rc); 332 } 333 /* initialize globals */ 334 335 DO_INIT_CONFIGURE(rf_ConfigureAllocList); 336 337 /* 338 * Yes, this does make debugging general to the whole 339 * system instead of being array specific. Bummer, drag. 340 */ 341 rf_ConfigureDebug(cfgPtr); 342 DO_INIT_CONFIGURE(rf_ConfigureDebugMem); 343 DO_INIT_CONFIGURE(rf_ConfigureAccessTrace); 344 DO_INIT_CONFIGURE(rf_ConfigureMapModule); 345 DO_INIT_CONFIGURE(rf_ConfigureReconEvent); 346 DO_INIT_CONFIGURE(rf_ConfigureCallback); 347 DO_INIT_CONFIGURE(rf_ConfigureRDFreeList); 348 DO_INIT_CONFIGURE(rf_ConfigureNWayXor); 349 DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList); 350 DO_INIT_CONFIGURE(rf_ConfigureMCPair); 351 DO_INIT_CONFIGURE(rf_ConfigureDAGs); 352 DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs); 353 DO_INIT_CONFIGURE(rf_ConfigureReconstruction); 354 DO_INIT_CONFIGURE(rf_ConfigureCopyback); 355 DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem); 356 isconfigged = 1; 357 } 358 RF_UNLOCK_LKMGR_MUTEX(configureMutex); 359 360 DO_RAID_MUTEX(&raidPtr->mutex); 361 /* set up the cleanup list. Do this after ConfigureDebug so that 362 * value of memDebug will be set */ 363 364 rf_MakeAllocList(raidPtr->cleanupList); 365 if (raidPtr->cleanupList == NULL) { 366 DO_RAID_FAIL(); 367 return (ENOMEM); 368 } 369 rc = rf_ShutdownCreate(&raidPtr->shutdownList, 370 (void (*) (void *)) rf_FreeAllocList, 371 raidPtr->cleanupList); 372 if (rc) { 373 rf_print_unable_to_add_shutdown(__FILE__, __LINE__, rc); 374 DO_RAID_FAIL(); 375 return (rc); 376 } 377 raidPtr->numRow = cfgPtr->numRow; 378 raidPtr->numCol = cfgPtr->numCol; 379 raidPtr->numSpare = cfgPtr->numSpare; 380 381 /* XXX we don't even pretend to support more than one row in the 382 * kernel... */ 383 if (raidPtr->numRow != 1) { 384 RF_ERRORMSG("Only one row supported in kernel.\n"); 385 DO_RAID_FAIL(); 386 return (EINVAL); 387 } 388 RF_CallocAndAdd(raidPtr->status, raidPtr->numRow, sizeof(RF_RowStatus_t), 389 (RF_RowStatus_t *), raidPtr->cleanupList); 390 if (raidPtr->status == NULL) { 391 DO_RAID_FAIL(); 392 return (ENOMEM); 393 } 394 RF_CallocAndAdd(raidPtr->reconControl, raidPtr->numRow, 395 sizeof(RF_ReconCtrl_t *), (RF_ReconCtrl_t **), raidPtr->cleanupList); 396 if (raidPtr->reconControl == NULL) { 397 DO_RAID_FAIL(); 398 return (ENOMEM); 399 } 400 for (i = 0; i < raidPtr->numRow; i++) { 401 raidPtr->status[i] = rf_rs_optimal; 402 raidPtr->reconControl[i] = NULL; 403 } 404 405 TAILQ_INIT(&(raidPtr->iodone)); 406 simple_lock_init(&(raidPtr->iodone_lock)); 407 408 DO_RAID_INIT_CONFIGURE(rf_ConfigureEngine); 409 DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLocks); 410 411 DO_RAID_COND(&raidPtr->outstandingCond); 412 413 raidPtr->nAccOutstanding = 0; 414 raidPtr->waitShutdown = 0; 415 416 DO_RAID_MUTEX(&raidPtr->access_suspend_mutex); 417 DO_RAID_COND(&raidPtr->quiescent_cond); 418 419 DO_RAID_COND(&raidPtr->waitForReconCond); 420 421 DO_RAID_MUTEX(&raidPtr->recon_done_proc_mutex); 422 423 if (ac!=NULL) { 424 /* We have an AutoConfig structure.. Don't do the 425 normal disk configuration... call the auto config 426 stuff */ 427 rf_AutoConfigureDisks(raidPtr, cfgPtr, ac); 428 } else { 429 DO_RAID_INIT_CONFIGURE(rf_ConfigureDisks); 430 DO_RAID_INIT_CONFIGURE(rf_ConfigureSpareDisks); 431 } 432 /* do this after ConfigureDisks & ConfigureSpareDisks to be sure dev 433 * no. is set */ 434 DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueues); 435 436 DO_RAID_INIT_CONFIGURE(rf_ConfigureLayout); 437 438 DO_RAID_INIT_CONFIGURE(rf_ConfigurePSStatus); 439 440 for (row = 0; row < raidPtr->numRow; row++) { 441 for (col = 0; col < raidPtr->numCol; col++) { 442 /* 443 * XXX better distribution 444 */ 445 raidPtr->hist_diskreq[row][col] = 0; 446 } 447 } 448 449 raidPtr->numNewFailures = 0; 450 raidPtr->copyback_in_progress = 0; 451 raidPtr->parity_rewrite_in_progress = 0; 452 raidPtr->recon_in_progress = 0; 453 raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs; 454 455 /* autoconfigure and root_partition will actually get filled in 456 after the config is done */ 457 raidPtr->autoconfigure = 0; 458 raidPtr->root_partition = 0; 459 raidPtr->last_unit = raidPtr->raidid; 460 raidPtr->config_order = 0; 461 462 if (rf_keepAccTotals) { 463 raidPtr->keep_acc_totals = 1; 464 } 465 rf_StartUserStats(raidPtr); 466 467 raidPtr->valid = 1; 468 469 printf("raid%d: %s\n", raidPtr->raidid, 470 raidPtr->Layout.map->configName); 471 printf("raid%d: Components:", raidPtr->raidid); 472 for (row = 0; row < raidPtr->numRow; row++) { 473 for (col = 0; col < raidPtr->numCol; col++) { 474 printf(" %s", raidPtr->Disks[row][col].devname); 475 if (RF_DEAD_DISK(raidPtr->Disks[row][col].status)) { 476 printf("[**FAILED**]"); 477 } 478 } 479 } 480 printf("\n"); 481 printf("raid%d: Total Sectors: %lu (%lu MB)\n", 482 raidPtr->raidid, 483 (unsigned long) raidPtr->totalSectors, 484 (unsigned long) (raidPtr->totalSectors / 1024 * 485 (1 << raidPtr->logBytesPerSector) / 1024)); 486 487 return (0); 488 } 489 490 static int 491 init_rad(desc) 492 RF_RaidAccessDesc_t *desc; 493 { 494 int rc; 495 496 rc = rf_mutex_init(&desc->mutex); 497 if (rc) { 498 rf_print_unable_to_init_mutex(__FILE__, __LINE__, rc); 499 return (rc); 500 } 501 rc = rf_cond_init(&desc->cond); 502 if (rc) { 503 rf_print_unable_to_init_cond(__FILE__, __LINE__, rc); 504 rf_mutex_destroy(&desc->mutex); 505 return (rc); 506 } 507 return (0); 508 } 509 510 static void 511 clean_rad(desc) 512 RF_RaidAccessDesc_t *desc; 513 { 514 rf_mutex_destroy(&desc->mutex); 515 rf_cond_destroy(&desc->cond); 516 } 517 518 static void 519 rf_ShutdownRDFreeList(ignored) 520 void *ignored; 521 { 522 RF_FREELIST_DESTROY_CLEAN(rf_rad_freelist, next, (RF_RaidAccessDesc_t *), clean_rad); 523 } 524 525 static int 526 rf_ConfigureRDFreeList(listp) 527 RF_ShutdownList_t **listp; 528 { 529 int rc; 530 531 RF_FREELIST_CREATE(rf_rad_freelist, RF_MAX_FREE_RAD, 532 RF_RAD_INC, sizeof(RF_RaidAccessDesc_t)); 533 if (rf_rad_freelist == NULL) { 534 return (ENOMEM); 535 } 536 rc = rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, NULL); 537 if (rc) { 538 rf_print_unable_to_add_shutdown(__FILE__, __LINE__, rc); 539 rf_ShutdownRDFreeList(NULL); 540 return (rc); 541 } 542 RF_FREELIST_PRIME_INIT(rf_rad_freelist, RF_RAD_INITIAL, next, 543 (RF_RaidAccessDesc_t *), init_rad); 544 return (0); 545 } 546 547 RF_RaidAccessDesc_t * 548 rf_AllocRaidAccDesc( 549 RF_Raid_t * raidPtr, 550 RF_IoType_t type, 551 RF_RaidAddr_t raidAddress, 552 RF_SectorCount_t numBlocks, 553 caddr_t bufPtr, 554 void *bp, 555 RF_RaidAccessFlags_t flags, 556 RF_AccessState_t * states) 557 { 558 RF_RaidAccessDesc_t *desc; 559 560 RF_FREELIST_GET_INIT_NOUNLOCK(rf_rad_freelist, desc, next, (RF_RaidAccessDesc_t *), init_rad); 561 if (raidPtr->waitShutdown) { 562 /* 563 * Actually, we're shutting the array down. Free the desc 564 * and return NULL. 565 */ 566 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 567 RF_FREELIST_FREE_CLEAN(rf_rad_freelist, desc, next, clean_rad); 568 return (NULL); 569 } 570 raidPtr->nAccOutstanding++; 571 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 572 573 desc->raidPtr = (void *) raidPtr; 574 desc->type = type; 575 desc->raidAddress = raidAddress; 576 desc->numBlocks = numBlocks; 577 desc->bufPtr = bufPtr; 578 desc->bp = bp; 579 desc->paramDAG = NULL; 580 desc->paramASM = NULL; 581 desc->flags = flags; 582 desc->states = states; 583 desc->state = 0; 584 585 desc->status = 0; 586 memset((char *) &desc->tracerec, 0, sizeof(RF_AccTraceEntry_t)); 587 desc->callbackFunc = NULL; 588 desc->callbackArg = NULL; 589 desc->next = NULL; 590 desc->head = desc; 591 desc->cleanupList = NULL; 592 rf_MakeAllocList(desc->cleanupList); 593 return (desc); 594 } 595 596 void 597 rf_FreeRaidAccDesc(RF_RaidAccessDesc_t * desc) 598 { 599 RF_Raid_t *raidPtr = desc->raidPtr; 600 601 RF_ASSERT(desc); 602 603 rf_FreeAllocList(desc->cleanupList); 604 RF_FREELIST_FREE_CLEAN_NOUNLOCK(rf_rad_freelist, desc, next, clean_rad); 605 raidPtr->nAccOutstanding--; 606 if (raidPtr->waitShutdown) { 607 RF_SIGNAL_COND(raidPtr->outstandingCond); 608 } 609 RF_FREELIST_DO_UNLOCK(rf_rad_freelist); 610 } 611 /********************************************************************* 612 * Main routine for performing an access. 613 * Accesses are retried until a DAG can not be selected. This occurs 614 * when either the DAG library is incomplete or there are too many 615 * failures in a parity group. 616 ********************************************************************/ 617 int 618 rf_DoAccess( 619 RF_Raid_t * raidPtr, 620 RF_IoType_t type, 621 int async_flag, 622 RF_RaidAddr_t raidAddress, 623 RF_SectorCount_t numBlocks, 624 caddr_t bufPtr, 625 void *bp_in, 626 RF_RaidAccessFlags_t flags) 627 /* 628 type should be read or write 629 async_flag should be RF_TRUE or RF_FALSE 630 bp_in is a buf pointer. void * to facilitate ignoring it outside the kernel 631 */ 632 { 633 RF_RaidAccessDesc_t *desc; 634 caddr_t lbufPtr = bufPtr; 635 struct buf *bp = (struct buf *) bp_in; 636 637 raidAddress += rf_raidSectorOffset; 638 639 #if RF_ACCESS_DEBUG 640 if (rf_accessDebug) { 641 642 printf("logBytes is: %d %d %d\n", raidPtr->raidid, 643 raidPtr->logBytesPerSector, 644 (int) rf_RaidAddressToByte(raidPtr, numBlocks)); 645 printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n", raidPtr->raidid, 646 (type == RF_IO_TYPE_READ) ? "READ" : "WRITE", (int) raidAddress, 647 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress), 648 (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress + numBlocks - 1), 649 (int) numBlocks, 650 (int) rf_RaidAddressToByte(raidPtr, numBlocks), 651 (long) bufPtr); 652 } 653 #endif 654 if (raidAddress + numBlocks > raidPtr->totalSectors) { 655 656 printf("DoAccess: raid addr %lu too large to access %lu sectors. Max legal addr is %lu\n", 657 (u_long) raidAddress, (u_long) numBlocks, (u_long) raidPtr->totalSectors); 658 659 IO_BUF_ERR(bp, ENOSPC); 660 return (ENOSPC); 661 } 662 desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress, 663 numBlocks, lbufPtr, bp, flags, raidPtr->Layout.map->states); 664 665 if (desc == NULL) { 666 return (ENOMEM); 667 } 668 RF_ETIMER_START(desc->tracerec.tot_timer); 669 670 desc->async_flag = async_flag; 671 672 rf_ContinueRaidAccess(desc); 673 674 return (0); 675 } 676 #if 0 677 /* force the array into reconfigured mode without doing reconstruction */ 678 int 679 rf_SetReconfiguredMode(raidPtr, row, col) 680 RF_Raid_t *raidPtr; 681 int row; 682 int col; 683 { 684 if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) { 685 printf("Can't set reconfigured mode in dedicated-spare array\n"); 686 RF_PANIC(); 687 } 688 RF_LOCK_MUTEX(raidPtr->mutex); 689 raidPtr->numFailures++; 690 raidPtr->Disks[row][col].status = rf_ds_dist_spared; 691 raidPtr->status[row] = rf_rs_reconfigured; 692 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 693 /* install spare table only if declustering + distributed sparing 694 * architecture. */ 695 if (raidPtr->Layout.map->flags & RF_BD_DECLUSTERED) 696 rf_InstallSpareTable(raidPtr, row, col); 697 RF_UNLOCK_MUTEX(raidPtr->mutex); 698 return (0); 699 } 700 #endif 701 702 int 703 rf_FailDisk( 704 RF_Raid_t * raidPtr, 705 int frow, 706 int fcol, 707 int initRecon) 708 { 709 printf("raid%d: Failing disk r%d c%d\n", raidPtr->raidid, frow, fcol); 710 RF_LOCK_MUTEX(raidPtr->mutex); 711 raidPtr->numFailures++; 712 raidPtr->Disks[frow][fcol].status = rf_ds_failed; 713 raidPtr->status[frow] = rf_rs_degraded; 714 RF_UNLOCK_MUTEX(raidPtr->mutex); 715 rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); 716 717 /* Close the component, so that it's not "locked" if someone 718 else want's to use it! */ 719 720 rf_close_component(raidPtr, raidPtr->raid_cinfo[frow][fcol].ci_vp, 721 raidPtr->Disks[frow][fcol].auto_configured); 722 723 RF_LOCK_MUTEX(raidPtr->mutex); 724 raidPtr->raid_cinfo[frow][fcol].ci_vp = NULL; 725 726 /* Need to mark the component as not being auto_configured 727 (in case it was previously). */ 728 729 raidPtr->Disks[frow][fcol].auto_configured = 0; 730 RF_UNLOCK_MUTEX(raidPtr->mutex); 731 732 if (initRecon) 733 rf_ReconstructFailedDisk(raidPtr, frow, fcol); 734 return (0); 735 } 736 /* releases a thread that is waiting for the array to become quiesced. 737 * access_suspend_mutex should be locked upon calling this 738 */ 739 void 740 rf_SignalQuiescenceLock(raidPtr) 741 RF_Raid_t *raidPtr; 742 { 743 #if RF_DEBUG_QUIESCE 744 if (rf_quiesceDebug) { 745 printf("raid%d: Signalling quiescence lock\n", 746 raidPtr->raidid); 747 } 748 #endif 749 raidPtr->access_suspend_release = 1; 750 751 if (raidPtr->waiting_for_quiescence) { 752 SIGNAL_QUIESCENT_COND(raidPtr); 753 } 754 } 755 /* suspends all new requests to the array. No effect on accesses that are in flight. */ 756 int 757 rf_SuspendNewRequestsAndWait(raidPtr) 758 RF_Raid_t *raidPtr; 759 { 760 #if RF_DEBUG_QUIESCE 761 if (rf_quiesceDebug) 762 printf("raid%d: Suspending new reqs\n", raidPtr->raidid); 763 #endif 764 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 765 raidPtr->accesses_suspended++; 766 raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1; 767 768 if (raidPtr->waiting_for_quiescence) { 769 raidPtr->access_suspend_release = 0; 770 while (!raidPtr->access_suspend_release) { 771 printf("raid%d: Suspending: Waiting for Quiescence\n", 772 raidPtr->raidid); 773 WAIT_FOR_QUIESCENCE(raidPtr); 774 raidPtr->waiting_for_quiescence = 0; 775 } 776 } 777 printf("raid%d: Quiescence reached..\n", raidPtr->raidid); 778 779 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 780 return (raidPtr->waiting_for_quiescence); 781 } 782 /* wake up everyone waiting for quiescence to be released */ 783 void 784 rf_ResumeNewRequests(raidPtr) 785 RF_Raid_t *raidPtr; 786 { 787 RF_CallbackDesc_t *t, *cb; 788 789 #if RF_DEBUG_QUIESCE 790 if (rf_quiesceDebug) 791 printf("Resuming new reqs\n"); 792 #endif 793 794 RF_LOCK_MUTEX(raidPtr->access_suspend_mutex); 795 raidPtr->accesses_suspended--; 796 if (raidPtr->accesses_suspended == 0) 797 cb = raidPtr->quiesce_wait_list; 798 else 799 cb = NULL; 800 raidPtr->quiesce_wait_list = NULL; 801 RF_UNLOCK_MUTEX(raidPtr->access_suspend_mutex); 802 803 while (cb) { 804 t = cb; 805 cb = cb->next; 806 (t->callbackFunc) (t->callbackArg); 807 rf_FreeCallbackDesc(t); 808 } 809 } 810 /***************************************************************************************** 811 * 812 * debug routines 813 * 814 ****************************************************************************************/ 815 816 static void 817 set_debug_option(name, val) 818 char *name; 819 long val; 820 { 821 RF_DebugName_t *p; 822 823 for (p = rf_debugNames; p->name; p++) { 824 if (!strcmp(p->name, name)) { 825 *(p->ptr) = val; 826 printf("[Set debug variable %s to %ld]\n", name, val); 827 return; 828 } 829 } 830 RF_ERRORMSG1("Unknown debug string \"%s\"\n", name); 831 } 832 833 834 /* would like to use sscanf here, but apparently not available in kernel */ 835 /*ARGSUSED*/ 836 static void 837 rf_ConfigureDebug(cfgPtr) 838 RF_Config_t *cfgPtr; 839 { 840 char *val_p, *name_p, *white_p; 841 long val; 842 int i; 843 844 rf_ResetDebugOptions(); 845 for (i = 0; cfgPtr->debugVars[i][0] && i < RF_MAXDBGV; i++) { 846 name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]); 847 white_p = rf_find_white(name_p); /* skip to start of 2nd 848 * word */ 849 val_p = rf_find_non_white(white_p); 850 if (*val_p == '0' && *(val_p + 1) == 'x') 851 val = rf_htoi(val_p + 2); 852 else 853 val = rf_atoi(val_p); 854 *white_p = '\0'; 855 set_debug_option(name_p, val); 856 } 857 } 858 /* performance monitoring stuff */ 859 860 #define TIMEVAL_TO_US(t) (((long) t.tv_sec) * 1000000L + (long) t.tv_usec) 861 862 #if !defined(_KERNEL) && !defined(SIMULATE) 863 864 /* 865 * Throughput stats currently only used in user-level RAIDframe 866 */ 867 868 static int 869 rf_InitThroughputStats( 870 RF_ShutdownList_t ** listp, 871 RF_Raid_t * raidPtr, 872 RF_Config_t * cfgPtr) 873 { 874 int rc; 875 876 /* these used by user-level raidframe only */ 877 rc = rf_create_managed_mutex(listp, &raidPtr->throughputstats.mutex); 878 if (rc) { 879 rf_print_unable_to_init_mutex(__FILE__, __LINE__, rc); 880 return (rc); 881 } 882 raidPtr->throughputstats.sum_io_us = 0; 883 raidPtr->throughputstats.num_ios = 0; 884 raidPtr->throughputstats.num_out_ios = 0; 885 return (0); 886 } 887 888 void 889 rf_StartThroughputStats(RF_Raid_t * raidPtr) 890 { 891 RF_LOCK_MUTEX(raidPtr->throughputstats.mutex); 892 raidPtr->throughputstats.num_ios++; 893 raidPtr->throughputstats.num_out_ios++; 894 if (raidPtr->throughputstats.num_out_ios == 1) 895 RF_GETTIME(raidPtr->throughputstats.start); 896 RF_UNLOCK_MUTEX(raidPtr->throughputstats.mutex); 897 } 898 899 static void 900 rf_StopThroughputStats(RF_Raid_t * raidPtr) 901 { 902 struct timeval diff; 903 904 RF_LOCK_MUTEX(raidPtr->throughputstats.mutex); 905 raidPtr->throughputstats.num_out_ios--; 906 if (raidPtr->throughputstats.num_out_ios == 0) { 907 RF_GETTIME(raidPtr->throughputstats.stop); 908 RF_TIMEVAL_DIFF(&raidPtr->throughputstats.start, &raidPtr->throughputstats.stop, &diff); 909 raidPtr->throughputstats.sum_io_us += TIMEVAL_TO_US(diff); 910 } 911 RF_UNLOCK_MUTEX(raidPtr->throughputstats.mutex); 912 } 913 914 static void 915 rf_PrintThroughputStats(RF_Raid_t * raidPtr) 916 { 917 RF_ASSERT(raidPtr->throughputstats.num_out_ios == 0); 918 if (raidPtr->throughputstats.sum_io_us != 0) { 919 printf("[Througphut: %8.2f IOs/second]\n", raidPtr->throughputstats.num_ios 920 / (raidPtr->throughputstats.sum_io_us / 1000000.0)); 921 } 922 } 923 #endif /* !KERNEL && !SIMULATE */ 924 925 void 926 rf_StartUserStats(RF_Raid_t * raidPtr) 927 { 928 RF_GETTIME(raidPtr->userstats.start); 929 raidPtr->userstats.sum_io_us = 0; 930 raidPtr->userstats.num_ios = 0; 931 raidPtr->userstats.num_sect_moved = 0; 932 } 933 934 void 935 rf_StopUserStats(RF_Raid_t * raidPtr) 936 { 937 RF_GETTIME(raidPtr->userstats.stop); 938 } 939 940 void 941 rf_UpdateUserStats(raidPtr, rt, numsect) 942 RF_Raid_t *raidPtr; 943 int rt; /* resp time in us */ 944 int numsect; /* number of sectors for this access */ 945 { 946 raidPtr->userstats.sum_io_us += rt; 947 raidPtr->userstats.num_ios++; 948 raidPtr->userstats.num_sect_moved += numsect; 949 } 950 951 void 952 rf_PrintUserStats(RF_Raid_t * raidPtr) 953 { 954 long elapsed_us, mbs, mbs_frac; 955 struct timeval diff; 956 957 RF_TIMEVAL_DIFF(&raidPtr->userstats.start, &raidPtr->userstats.stop, &diff); 958 elapsed_us = TIMEVAL_TO_US(diff); 959 960 /* 2000 sectors per megabyte, 10000000 microseconds per second */ 961 if (elapsed_us) 962 mbs = (raidPtr->userstats.num_sect_moved / 2000) / (elapsed_us / 1000000); 963 else 964 mbs = 0; 965 966 /* this computes only the first digit of the fractional mb/s moved */ 967 if (elapsed_us) { 968 mbs_frac = ((raidPtr->userstats.num_sect_moved / 200) / (elapsed_us / 1000000)) 969 - (mbs * 10); 970 } else { 971 mbs_frac = 0; 972 } 973 974 printf("Number of I/Os: %ld\n", raidPtr->userstats.num_ios); 975 printf("Elapsed time (us): %ld\n", elapsed_us); 976 printf("User I/Os per second: %ld\n", RF_DB0_CHECK(raidPtr->userstats.num_ios, (elapsed_us / 1000000))); 977 printf("Average user response time: %ld us\n", RF_DB0_CHECK(raidPtr->userstats.sum_io_us, raidPtr->userstats.num_ios)); 978 printf("Total sectors moved: %ld\n", raidPtr->userstats.num_sect_moved); 979 printf("Average access size (sect): %ld\n", RF_DB0_CHECK(raidPtr->userstats.num_sect_moved, raidPtr->userstats.num_ios)); 980 printf("Achieved data rate: %ld.%ld MB/sec\n", mbs, mbs_frac); 981 } 982 983 984 void 985 rf_print_panic_message(line,file) 986 int line; 987 char *file; 988 { 989 sprintf(rf_panicbuf,"raidframe error at line %d file %s", 990 line, file); 991 } 992 993 #ifdef RAID_DIAGNOSTIC 994 void 995 rf_print_assert_panic_message(line,file,condition) 996 int line; 997 char *file; 998 char *condition; 999 { 1000 sprintf(rf_panicbuf, 1001 "raidframe error at line %d file %s (failed asserting %s)\n", 1002 line, file, condition); 1003 } 1004 #endif 1005 1006 void 1007 rf_print_unable_to_init_mutex(file,line,rc) 1008 char *file; 1009 int line; 1010 int rc; 1011 { 1012 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", 1013 file, line, rc); 1014 } 1015 1016 void 1017 rf_print_unable_to_init_cond(file,line,rc) 1018 char *file; 1019 int line; 1020 int rc; 1021 { 1022 RF_ERRORMSG3("Unable to init cond file %s line %d rc=%d\n", 1023 file, line, rc); 1024 } 1025 1026 void 1027 rf_print_unable_to_add_shutdown(file,line,rc) 1028 char *file; 1029 int line; 1030 int rc; 1031 { 1032 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", 1033 file, line, rc); 1034 } 1035