| 1 | /* $NetBSD: rf_driver.c,v 1.132 2015/12/26 00:58:45 pgoyette 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 1.132 2015/12/26 00:58:45 pgoyette 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 | /* debug variables */ |
| 125 | char rf_panicbuf[2048]; /* a buffer to hold an error msg when we panic */ |
| 126 | |
| 127 | /* main configuration routines */ |
| 128 | static int raidframe_booted = 0; |
| 129 | |
| 130 | static void rf_ConfigureDebug(RF_Config_t * cfgPtr); |
| 131 | static void set_debug_option(char *name, long val); |
| 132 | static void rf_UnconfigureArray(void); |
| 133 | static void rf_ShutdownRDFreeList(void *); |
| 134 | static int rf_ConfigureRDFreeList(RF_ShutdownList_t **); |
| 135 | |
| 136 | rf_declare_mutex2(rf_printf_mutex); /* debug only: avoids interleaved |
| 137 | * printfs by different stripes */ |
| 138 | |
| 139 | #define SIGNAL_QUIESCENT_COND(_raid_) \ |
| 140 | rf_broadcast_cond2((_raid_)->access_suspend_cv) |
| 141 | #define WAIT_FOR_QUIESCENCE(_raid_) \ |
| 142 | rf_wait_cond2((_raid_)->access_suspend_cv, \ |
| 143 | (_raid_)->access_suspend_mutex) |
| 144 | |
| 145 | static int configureCount = 0; /* number of active configurations */ |
| 146 | static int isconfigged = 0; /* is basic raidframe (non per-array) |
| 147 | * stuff configured */ |
| 148 | static rf_declare_mutex2(configureMutex); /* used to lock the configuration |
| 149 | * stuff */ |
| 150 | static RF_ShutdownList_t *globalShutdown; /* non array-specific |
| 151 | * stuff */ |
| 152 | |
| 153 | static int rf_ConfigureRDFreeList(RF_ShutdownList_t ** listp); |
| 154 | static int rf_AllocEmergBuffers(RF_Raid_t *); |
| 155 | static void rf_FreeEmergBuffers(RF_Raid_t *); |
| 156 | static void rf_destroy_mutex_cond(RF_Raid_t *); |
| 157 | static void rf_alloc_mutex_cond(RF_Raid_t *); |
| 158 | |
| 159 | /* called at system boot time */ |
| 160 | int |
| 161 | rf_BootRaidframe(bool boot) |
| 162 | { |
| 163 | |
| 164 | if (boot) { |
| 165 | if (raidframe_booted) |
| 166 | return (EBUSY); |
| 167 | raidframe_booted = 1; |
| 168 | rf_init_mutex2(configureMutex, IPL_NONE); |
| 169 | configureCount = 0; |
| 170 | isconfigged = 0; |
| 171 | globalShutdown = NULL; |
| 172 | } else { |
| 173 | rf_destroy_mutex2(configureMutex); |
| 174 | raidframe_booted = 0; |
| 175 | } |
| 176 | return (0); |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * Called whenever an array is shutdown |
| 181 | */ |
| 182 | static void |
| 183 | rf_UnconfigureArray(void) |
| 184 | { |
| 185 | |
| 186 | rf_lock_mutex2(configureMutex); |
| 187 | if (--configureCount == 0) { /* if no active configurations, shut |
| 188 | * everything down */ |
| 189 | rf_destroy_mutex2(rf_printf_mutex); |
| 190 | isconfigged = 0; |
| 191 | rf_ShutdownList(&globalShutdown); |
| 192 | |
| 193 | /* |
| 194 | * We must wait until now, because the AllocList module |
| 195 | * uses the DebugMem module. |
| 196 | */ |
| 197 | #if RF_DEBUG_MEM |
| 198 | if (rf_memDebug) |
| 199 | rf_print_unfreed(); |
| 200 | #endif |
| 201 | } |
| 202 | rf_unlock_mutex2(configureMutex); |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Called to shut down an array. |
| 207 | */ |
| 208 | int |
| 209 | rf_Shutdown(RF_Raid_t *raidPtr) |
| 210 | { |
| 211 | |
| 212 | if (!raidPtr->valid) { |
| 213 | RF_ERRORMSG("Attempt to shut down unconfigured RAIDframe driver. Aborting shutdown\n" ); |
| 214 | return (EINVAL); |
| 215 | } |
| 216 | /* |
| 217 | * wait for outstanding IOs to land |
| 218 | * As described in rf_raid.h, we use the rad_freelist lock |
| 219 | * to protect the per-array info about outstanding descs |
| 220 | * since we need to do freelist locking anyway, and this |
| 221 | * cuts down on the amount of serialization we've got going |
| 222 | * on. |
| 223 | */ |
| 224 | rf_lock_mutex2(raidPtr->rad_lock); |
| 225 | if (raidPtr->waitShutdown) { |
| 226 | rf_unlock_mutex2(raidPtr->rad_lock); |
| 227 | return (EBUSY); |
| 228 | } |
| 229 | raidPtr->waitShutdown = 1; |
| 230 | while (raidPtr->nAccOutstanding) { |
| 231 | rf_wait_cond2(raidPtr->outstandingCond, raidPtr->rad_lock); |
| 232 | } |
| 233 | rf_unlock_mutex2(raidPtr->rad_lock); |
| 234 | |
| 235 | /* Wait for any parity re-writes to stop... */ |
| 236 | while (raidPtr->parity_rewrite_in_progress) { |
| 237 | printf("raid%d: Waiting for parity re-write to exit...\n" , |
| 238 | raidPtr->raidid); |
| 239 | tsleep(&raidPtr->parity_rewrite_in_progress, PRIBIO, |
| 240 | "rfprwshutdown" , 0); |
| 241 | } |
| 242 | |
| 243 | /* Wait for any reconstruction to stop... */ |
| 244 | rf_lock_mutex2(raidPtr->mutex); |
| 245 | while (raidPtr->reconInProgress) { |
| 246 | printf("raid%d: Waiting for reconstruction to stop...\n" , |
| 247 | raidPtr->raidid); |
| 248 | rf_wait_cond2(raidPtr->waitForReconCond, raidPtr->mutex); |
| 249 | } |
| 250 | rf_unlock_mutex2(raidPtr->mutex); |
| 251 | |
| 252 | raidPtr->valid = 0; |
| 253 | |
| 254 | if (raidPtr->parity_map != NULL) |
| 255 | rf_paritymap_detach(raidPtr); |
| 256 | |
| 257 | rf_update_component_labels(raidPtr, RF_FINAL_COMPONENT_UPDATE); |
| 258 | |
| 259 | rf_UnconfigureVnodes(raidPtr); |
| 260 | |
| 261 | rf_FreeEmergBuffers(raidPtr); |
| 262 | |
| 263 | rf_ShutdownList(&raidPtr->shutdownList); |
| 264 | |
| 265 | rf_destroy_mutex_cond(raidPtr); |
| 266 | |
| 267 | rf_UnconfigureArray(); |
| 268 | |
| 269 | return (0); |
| 270 | } |
| 271 | |
| 272 | |
| 273 | #define DO_INIT_CONFIGURE(f) { \ |
| 274 | rc = f (&globalShutdown); \ |
| 275 | if (rc) { \ |
| 276 | RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ |
| 277 | rf_ShutdownList(&globalShutdown); \ |
| 278 | configureCount--; \ |
| 279 | rf_unlock_mutex2(configureMutex); \ |
| 280 | rf_destroy_mutex2(rf_printf_mutex); \ |
| 281 | return(rc); \ |
| 282 | } \ |
| 283 | } |
| 284 | |
| 285 | #define DO_RAID_FAIL() { \ |
| 286 | rf_UnconfigureVnodes(raidPtr); \ |
| 287 | rf_FreeEmergBuffers(raidPtr); \ |
| 288 | rf_ShutdownList(&raidPtr->shutdownList); \ |
| 289 | rf_UnconfigureArray(); \ |
| 290 | rf_destroy_mutex_cond(raidPtr); \ |
| 291 | } |
| 292 | |
| 293 | #define DO_RAID_INIT_CONFIGURE(f) { \ |
| 294 | rc = f (&raidPtr->shutdownList, raidPtr, cfgPtr); \ |
| 295 | if (rc) { \ |
| 296 | RF_ERRORMSG2("RAIDFRAME: failed %s with %d\n", RF_STRING(f), rc); \ |
| 297 | DO_RAID_FAIL(); \ |
| 298 | return(rc); \ |
| 299 | } \ |
| 300 | } |
| 301 | |
| 302 | int |
| 303 | rf_Configure(RF_Raid_t *raidPtr, RF_Config_t *cfgPtr, RF_AutoConfig_t *ac) |
| 304 | { |
| 305 | RF_RowCol_t col; |
| 306 | int rc; |
| 307 | |
| 308 | rf_lock_mutex2(configureMutex); |
| 309 | configureCount++; |
| 310 | if (isconfigged == 0) { |
| 311 | rf_init_mutex2(rf_printf_mutex, IPL_VM); |
| 312 | |
| 313 | /* initialize globals */ |
| 314 | |
| 315 | DO_INIT_CONFIGURE(rf_ConfigureAllocList); |
| 316 | |
| 317 | /* |
| 318 | * Yes, this does make debugging general to the whole |
| 319 | * system instead of being array specific. Bummer, drag. |
| 320 | */ |
| 321 | rf_ConfigureDebug(cfgPtr); |
| 322 | DO_INIT_CONFIGURE(rf_ConfigureDebugMem); |
| 323 | #if RF_ACC_TRACE > 0 |
| 324 | DO_INIT_CONFIGURE(rf_ConfigureAccessTrace); |
| 325 | #endif |
| 326 | DO_INIT_CONFIGURE(rf_ConfigureMapModule); |
| 327 | DO_INIT_CONFIGURE(rf_ConfigureReconEvent); |
| 328 | DO_INIT_CONFIGURE(rf_ConfigureCallback); |
| 329 | DO_INIT_CONFIGURE(rf_ConfigureRDFreeList); |
| 330 | DO_INIT_CONFIGURE(rf_ConfigureNWayXor); |
| 331 | DO_INIT_CONFIGURE(rf_ConfigureStripeLockFreeList); |
| 332 | DO_INIT_CONFIGURE(rf_ConfigureMCPair); |
| 333 | DO_INIT_CONFIGURE(rf_ConfigureDAGs); |
| 334 | DO_INIT_CONFIGURE(rf_ConfigureDAGFuncs); |
| 335 | DO_INIT_CONFIGURE(rf_ConfigureReconstruction); |
| 336 | DO_INIT_CONFIGURE(rf_ConfigureCopyback); |
| 337 | DO_INIT_CONFIGURE(rf_ConfigureDiskQueueSystem); |
| 338 | DO_INIT_CONFIGURE(rf_ConfigurePSStatus); |
| 339 | isconfigged = 1; |
| 340 | } |
| 341 | rf_unlock_mutex2(configureMutex); |
| 342 | |
| 343 | rf_alloc_mutex_cond(raidPtr); |
| 344 | |
| 345 | /* set up the cleanup list. Do this after ConfigureDebug so that |
| 346 | * value of memDebug will be set */ |
| 347 | |
| 348 | rf_MakeAllocList(raidPtr->cleanupList); |
| 349 | if (raidPtr->cleanupList == NULL) { |
| 350 | DO_RAID_FAIL(); |
| 351 | return (ENOMEM); |
| 352 | } |
| 353 | rf_ShutdownCreate(&raidPtr->shutdownList, |
| 354 | (void (*) (void *)) rf_FreeAllocList, |
| 355 | raidPtr->cleanupList); |
| 356 | |
| 357 | raidPtr->numCol = cfgPtr->numCol; |
| 358 | raidPtr->numSpare = cfgPtr->numSpare; |
| 359 | |
| 360 | raidPtr->status = rf_rs_optimal; |
| 361 | raidPtr->reconControl = NULL; |
| 362 | |
| 363 | DO_RAID_INIT_CONFIGURE(rf_ConfigureEngine); |
| 364 | DO_RAID_INIT_CONFIGURE(rf_ConfigureStripeLocks); |
| 365 | |
| 366 | raidPtr->nAccOutstanding = 0; |
| 367 | raidPtr->waitShutdown = 0; |
| 368 | |
| 369 | if (ac!=NULL) { |
| 370 | /* We have an AutoConfig structure.. Don't do the |
| 371 | normal disk configuration... call the auto config |
| 372 | stuff */ |
| 373 | rf_AutoConfigureDisks(raidPtr, cfgPtr, ac); |
| 374 | } else { |
| 375 | DO_RAID_INIT_CONFIGURE(rf_ConfigureDisks); |
| 376 | DO_RAID_INIT_CONFIGURE(rf_ConfigureSpareDisks); |
| 377 | } |
| 378 | /* do this after ConfigureDisks & ConfigureSpareDisks to be sure dev |
| 379 | * no. is set */ |
| 380 | DO_RAID_INIT_CONFIGURE(rf_ConfigureDiskQueues); |
| 381 | |
| 382 | DO_RAID_INIT_CONFIGURE(rf_ConfigureLayout); |
| 383 | |
| 384 | /* Initialize per-RAID PSS bits */ |
| 385 | rf_InitPSStatus(raidPtr); |
| 386 | |
| 387 | #if RF_INCLUDE_CHAINDECLUSTER > 0 |
| 388 | for (col = 0; col < raidPtr->numCol; col++) { |
| 389 | /* |
| 390 | * XXX better distribution |
| 391 | */ |
| 392 | raidPtr->hist_diskreq[col] = 0; |
| 393 | } |
| 394 | #endif |
| 395 | raidPtr->numNewFailures = 0; |
| 396 | raidPtr->copyback_in_progress = 0; |
| 397 | raidPtr->parity_rewrite_in_progress = 0; |
| 398 | raidPtr->adding_hot_spare = 0; |
| 399 | raidPtr->recon_in_progress = 0; |
| 400 | |
| 401 | raidPtr->maxOutstanding = cfgPtr->maxOutstandingDiskReqs; |
| 402 | |
| 403 | /* autoconfigure and root_partition will actually get filled in |
| 404 | after the config is done */ |
| 405 | raidPtr->autoconfigure = 0; |
| 406 | raidPtr->root_partition = 0; |
| 407 | raidPtr->last_unit = raidPtr->raidid; |
| 408 | raidPtr->config_order = 0; |
| 409 | |
| 410 | if (rf_keepAccTotals) { |
| 411 | raidPtr->keep_acc_totals = 1; |
| 412 | } |
| 413 | |
| 414 | /* Allocate a bunch of buffers to be used in low-memory conditions */ |
| 415 | raidPtr->iobuf = NULL; |
| 416 | |
| 417 | rc = rf_AllocEmergBuffers(raidPtr); |
| 418 | if (rc) { |
| 419 | printf("raid%d: Unable to allocate emergency buffers.\n" , |
| 420 | raidPtr->raidid); |
| 421 | DO_RAID_FAIL(); |
| 422 | return(rc); |
| 423 | } |
| 424 | |
| 425 | /* Set up parity map stuff, if applicable. */ |
| 426 | #ifndef RF_NO_PARITY_MAP |
| 427 | rf_paritymap_attach(raidPtr, cfgPtr->force); |
| 428 | #endif |
| 429 | |
| 430 | raidPtr->valid = 1; |
| 431 | |
| 432 | printf("raid%d: %s\n" , raidPtr->raidid, |
| 433 | raidPtr->Layout.map->configName); |
| 434 | printf("raid%d: Components:" , raidPtr->raidid); |
| 435 | |
| 436 | for (col = 0; col < raidPtr->numCol; col++) { |
| 437 | printf(" %s" , raidPtr->Disks[col].devname); |
| 438 | if (RF_DEAD_DISK(raidPtr->Disks[col].status)) { |
| 439 | printf("[**FAILED**]" ); |
| 440 | } |
| 441 | } |
| 442 | printf("\n" ); |
| 443 | printf("raid%d: Total Sectors: %" PRIu64 " (%" PRIu64 " MB)\n" , |
| 444 | raidPtr->raidid, |
| 445 | raidPtr->totalSectors, |
| 446 | (raidPtr->totalSectors / 1024 * |
| 447 | (1 << raidPtr->logBytesPerSector) / 1024)); |
| 448 | |
| 449 | return (0); |
| 450 | } |
| 451 | |
| 452 | |
| 453 | /* |
| 454 | |
| 455 | Routines to allocate and free the "emergency buffers" for a given |
| 456 | RAID set. These emergency buffers will be used when the kernel runs |
| 457 | out of kernel memory. |
| 458 | |
| 459 | */ |
| 460 | |
| 461 | static int |
| 462 | rf_AllocEmergBuffers(RF_Raid_t *raidPtr) |
| 463 | { |
| 464 | void *tmpbuf; |
| 465 | RF_VoidPointerListElem_t *vple; |
| 466 | int i; |
| 467 | |
| 468 | /* XXX next line needs tuning... */ |
| 469 | raidPtr->numEmergencyBuffers = 10 * raidPtr->numCol; |
| 470 | #if DEBUG |
| 471 | printf("raid%d: allocating %d buffers of %d bytes.\n" , |
| 472 | raidPtr->raidid, |
| 473 | raidPtr->numEmergencyBuffers, |
| 474 | (int)(raidPtr->Layout.sectorsPerStripeUnit << |
| 475 | raidPtr->logBytesPerSector)); |
| 476 | #endif |
| 477 | for (i = 0; i < raidPtr->numEmergencyBuffers; i++) { |
| 478 | tmpbuf = malloc( raidPtr->Layout.sectorsPerStripeUnit << |
| 479 | raidPtr->logBytesPerSector, |
| 480 | M_RAIDFRAME, M_WAITOK); |
| 481 | if (tmpbuf) { |
| 482 | vple = rf_AllocVPListElem(); |
| 483 | vple->p= tmpbuf; |
| 484 | vple->next = raidPtr->iobuf; |
| 485 | raidPtr->iobuf = vple; |
| 486 | raidPtr->iobuf_count++; |
| 487 | } else { |
| 488 | printf("raid%d: failed to allocate emergency buffer!\n" , |
| 489 | raidPtr->raidid); |
| 490 | return 1; |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | /* XXX next line needs tuning too... */ |
| 495 | raidPtr->numEmergencyStripeBuffers = 10; |
| 496 | for (i = 0; i < raidPtr->numEmergencyStripeBuffers; i++) { |
| 497 | tmpbuf = malloc( raidPtr->numCol * (raidPtr->Layout.sectorsPerStripeUnit << |
| 498 | raidPtr->logBytesPerSector), |
| 499 | M_RAIDFRAME, M_WAITOK); |
| 500 | if (tmpbuf) { |
| 501 | vple = rf_AllocVPListElem(); |
| 502 | vple->p= tmpbuf; |
| 503 | vple->next = raidPtr->stripebuf; |
| 504 | raidPtr->stripebuf = vple; |
| 505 | raidPtr->stripebuf_count++; |
| 506 | } else { |
| 507 | printf("raid%d: failed to allocate emergency stripe buffer!\n" , |
| 508 | raidPtr->raidid); |
| 509 | return 1; |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | return (0); |
| 514 | } |
| 515 | |
| 516 | static void |
| 517 | rf_FreeEmergBuffers(RF_Raid_t *raidPtr) |
| 518 | { |
| 519 | RF_VoidPointerListElem_t *tmp; |
| 520 | |
| 521 | /* Free the emergency IO buffers */ |
| 522 | while (raidPtr->iobuf != NULL) { |
| 523 | tmp = raidPtr->iobuf; |
| 524 | raidPtr->iobuf = raidPtr->iobuf->next; |
| 525 | free(tmp->p, M_RAIDFRAME); |
| 526 | rf_FreeVPListElem(tmp); |
| 527 | } |
| 528 | |
| 529 | /* Free the emergency stripe buffers */ |
| 530 | while (raidPtr->stripebuf != NULL) { |
| 531 | tmp = raidPtr->stripebuf; |
| 532 | raidPtr->stripebuf = raidPtr->stripebuf->next; |
| 533 | free(tmp->p, M_RAIDFRAME); |
| 534 | rf_FreeVPListElem(tmp); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | |
| 539 | static void |
| 540 | rf_ShutdownRDFreeList(void *ignored) |
| 541 | { |
| 542 | pool_destroy(&rf_pools.rad); |
| 543 | } |
| 544 | |
| 545 | static int |
| 546 | rf_ConfigureRDFreeList(RF_ShutdownList_t **listp) |
| 547 | { |
| 548 | |
| 549 | rf_pool_init(&rf_pools.rad, sizeof(RF_RaidAccessDesc_t), |
| 550 | "rf_rad_pl" , RF_MIN_FREE_RAD, RF_MAX_FREE_RAD); |
| 551 | rf_ShutdownCreate(listp, rf_ShutdownRDFreeList, NULL); |
| 552 | return (0); |
| 553 | } |
| 554 | |
| 555 | RF_RaidAccessDesc_t * |
| 556 | rf_AllocRaidAccDesc(RF_Raid_t *raidPtr, RF_IoType_t type, |
| 557 | RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, |
| 558 | void *bufPtr, void *bp, RF_RaidAccessFlags_t flags, |
| 559 | const RF_AccessState_t *states) |
| 560 | { |
| 561 | RF_RaidAccessDesc_t *desc; |
| 562 | |
| 563 | desc = pool_get(&rf_pools.rad, PR_WAITOK); |
| 564 | |
| 565 | rf_lock_mutex2(raidPtr->rad_lock); |
| 566 | if (raidPtr->waitShutdown) { |
| 567 | /* |
| 568 | * Actually, we're shutting the array down. Free the desc |
| 569 | * and return NULL. |
| 570 | */ |
| 571 | |
| 572 | rf_unlock_mutex2(raidPtr->rad_lock); |
| 573 | pool_put(&rf_pools.rad, desc); |
| 574 | return (NULL); |
| 575 | } |
| 576 | raidPtr->nAccOutstanding++; |
| 577 | |
| 578 | rf_unlock_mutex2(raidPtr->rad_lock); |
| 579 | |
| 580 | desc->raidPtr = (void *) raidPtr; |
| 581 | desc->type = type; |
| 582 | desc->raidAddress = raidAddress; |
| 583 | desc->numBlocks = numBlocks; |
| 584 | desc->bufPtr = bufPtr; |
| 585 | desc->bp = bp; |
| 586 | desc->flags = flags; |
| 587 | desc->states = states; |
| 588 | desc->state = 0; |
| 589 | desc->dagList = NULL; |
| 590 | |
| 591 | desc->status = 0; |
| 592 | desc->numRetries = 0; |
| 593 | #if RF_ACC_TRACE > 0 |
| 594 | memset((char *) &desc->tracerec, 0, sizeof(RF_AccTraceEntry_t)); |
| 595 | #endif |
| 596 | desc->callbackFunc = NULL; |
| 597 | desc->callbackArg = NULL; |
| 598 | desc->next = NULL; |
| 599 | desc->iobufs = NULL; |
| 600 | desc->stripebufs = NULL; |
| 601 | |
| 602 | return (desc); |
| 603 | } |
| 604 | |
| 605 | void |
| 606 | rf_FreeRaidAccDesc(RF_RaidAccessDesc_t *desc) |
| 607 | { |
| 608 | RF_Raid_t *raidPtr = desc->raidPtr; |
| 609 | RF_DagList_t *dagList, *temp; |
| 610 | RF_VoidPointerListElem_t *tmp; |
| 611 | |
| 612 | RF_ASSERT(desc); |
| 613 | |
| 614 | /* Cleanup the dagList(s) */ |
| 615 | dagList = desc->dagList; |
| 616 | while(dagList != NULL) { |
| 617 | temp = dagList; |
| 618 | dagList = dagList->next; |
| 619 | rf_FreeDAGList(temp); |
| 620 | } |
| 621 | |
| 622 | while (desc->iobufs) { |
| 623 | tmp = desc->iobufs; |
| 624 | desc->iobufs = desc->iobufs->next; |
| 625 | rf_FreeIOBuffer(raidPtr, tmp); |
| 626 | } |
| 627 | |
| 628 | while (desc->stripebufs) { |
| 629 | tmp = desc->stripebufs; |
| 630 | desc->stripebufs = desc->stripebufs->next; |
| 631 | rf_FreeStripeBuffer(raidPtr, tmp); |
| 632 | } |
| 633 | |
| 634 | pool_put(&rf_pools.rad, desc); |
| 635 | rf_lock_mutex2(raidPtr->rad_lock); |
| 636 | raidPtr->nAccOutstanding--; |
| 637 | if (raidPtr->waitShutdown) { |
| 638 | rf_signal_cond2(raidPtr->outstandingCond); |
| 639 | } |
| 640 | rf_unlock_mutex2(raidPtr->rad_lock); |
| 641 | } |
| 642 | /********************************************************************* |
| 643 | * Main routine for performing an access. |
| 644 | * Accesses are retried until a DAG can not be selected. This occurs |
| 645 | * when either the DAG library is incomplete or there are too many |
| 646 | * failures in a parity group. |
| 647 | * |
| 648 | * type should be read or write async_flag should be RF_TRUE or |
| 649 | * RF_FALSE bp_in is a buf pointer. void *to facilitate ignoring it |
| 650 | * outside the kernel |
| 651 | ********************************************************************/ |
| 652 | int |
| 653 | rf_DoAccess(RF_Raid_t * raidPtr, RF_IoType_t type, int async_flag, |
| 654 | RF_RaidAddr_t raidAddress, RF_SectorCount_t numBlocks, |
| 655 | void *bufPtr, struct buf *bp, RF_RaidAccessFlags_t flags) |
| 656 | { |
| 657 | RF_RaidAccessDesc_t *desc; |
| 658 | void *lbufPtr = bufPtr; |
| 659 | |
| 660 | raidAddress += rf_raidSectorOffset; |
| 661 | |
| 662 | #if RF_ACCESS_DEBUG |
| 663 | if (rf_accessDebug) { |
| 664 | |
| 665 | printf("logBytes is: %d %d %d\n" , raidPtr->raidid, |
| 666 | raidPtr->logBytesPerSector, |
| 667 | (int) rf_RaidAddressToByte(raidPtr, numBlocks)); |
| 668 | printf("raid%d: %s raidAddr %d (stripeid %d-%d) numBlocks %d (%d bytes) buf 0x%lx\n" , raidPtr->raidid, |
| 669 | (type == RF_IO_TYPE_READ) ? "READ" : "WRITE" , (int) raidAddress, |
| 670 | (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress), |
| 671 | (int) rf_RaidAddressToStripeID(&raidPtr->Layout, raidAddress + numBlocks - 1), |
| 672 | (int) numBlocks, |
| 673 | (int) rf_RaidAddressToByte(raidPtr, numBlocks), |
| 674 | (long) bufPtr); |
| 675 | } |
| 676 | #endif |
| 677 | |
| 678 | desc = rf_AllocRaidAccDesc(raidPtr, type, raidAddress, |
| 679 | numBlocks, lbufPtr, bp, flags, raidPtr->Layout.map->states); |
| 680 | |
| 681 | if (desc == NULL) { |
| 682 | return (ENOMEM); |
| 683 | } |
| 684 | #if RF_ACC_TRACE > 0 |
| 685 | RF_ETIMER_START(desc->tracerec.tot_timer); |
| 686 | #endif |
| 687 | desc->async_flag = async_flag; |
| 688 | |
| 689 | if (raidPtr->parity_map != NULL && |
| 690 | type == RF_IO_TYPE_WRITE) |
| 691 | rf_paritymap_begin(raidPtr->parity_map, raidAddress, |
| 692 | numBlocks); |
| 693 | |
| 694 | rf_ContinueRaidAccess(desc); |
| 695 | |
| 696 | return (0); |
| 697 | } |
| 698 | #if 0 |
| 699 | /* force the array into reconfigured mode without doing reconstruction */ |
| 700 | int |
| 701 | rf_SetReconfiguredMode(RF_Raid_t *raidPtr, int col) |
| 702 | { |
| 703 | if (!(raidPtr->Layout.map->flags & RF_DISTRIBUTE_SPARE)) { |
| 704 | printf("Can't set reconfigured mode in dedicated-spare array\n" ); |
| 705 | RF_PANIC(); |
| 706 | } |
| 707 | rf_lock_mutex2(raidPtr->mutex); |
| 708 | raidPtr->numFailures++; |
| 709 | raidPtr->Disks[col].status = rf_ds_dist_spared; |
| 710 | raidPtr->status = rf_rs_reconfigured; |
| 711 | rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); |
| 712 | /* install spare table only if declustering + distributed sparing |
| 713 | * architecture. */ |
| 714 | if (raidPtr->Layout.map->flags & RF_BD_DECLUSTERED) |
| 715 | rf_InstallSpareTable(raidPtr, col); |
| 716 | rf_unlock_mutex2(raidPtr->mutex); |
| 717 | return (0); |
| 718 | } |
| 719 | #endif |
| 720 | |
| 721 | int |
| 722 | rf_FailDisk(RF_Raid_t *raidPtr, int fcol, int initRecon) |
| 723 | { |
| 724 | |
| 725 | /* need to suspend IO's here -- if there are DAGs in flight |
| 726 | and we pull the rug out from under ci_vp, Bad Things |
| 727 | can happen. */ |
| 728 | |
| 729 | rf_SuspendNewRequestsAndWait(raidPtr); |
| 730 | |
| 731 | rf_lock_mutex2(raidPtr->mutex); |
| 732 | if (raidPtr->Disks[fcol].status != rf_ds_failed) { |
| 733 | /* must be failing something that is valid, or else it's |
| 734 | already marked as failed (in which case we don't |
| 735 | want to mark it failed again!) */ |
| 736 | raidPtr->numFailures++; |
| 737 | raidPtr->Disks[fcol].status = rf_ds_failed; |
| 738 | raidPtr->status = rf_rs_degraded; |
| 739 | } |
| 740 | rf_unlock_mutex2(raidPtr->mutex); |
| 741 | |
| 742 | rf_update_component_labels(raidPtr, RF_NORMAL_COMPONENT_UPDATE); |
| 743 | |
| 744 | /* Close the component, so that it's not "locked" if someone |
| 745 | else want's to use it! */ |
| 746 | |
| 747 | rf_close_component(raidPtr, raidPtr->raid_cinfo[fcol].ci_vp, |
| 748 | raidPtr->Disks[fcol].auto_configured); |
| 749 | |
| 750 | rf_lock_mutex2(raidPtr->mutex); |
| 751 | raidPtr->raid_cinfo[fcol].ci_vp = NULL; |
| 752 | |
| 753 | /* Need to mark the component as not being auto_configured |
| 754 | (in case it was previously). */ |
| 755 | |
| 756 | raidPtr->Disks[fcol].auto_configured = 0; |
| 757 | rf_unlock_mutex2(raidPtr->mutex); |
| 758 | /* now we can allow IO to continue -- we'll be suspending it |
| 759 | again in rf_ReconstructFailedDisk() if we have to.. */ |
| 760 | |
| 761 | rf_ResumeNewRequests(raidPtr); |
| 762 | |
| 763 | if (initRecon) |
| 764 | rf_ReconstructFailedDisk(raidPtr, fcol); |
| 765 | return (0); |
| 766 | } |
| 767 | /* releases a thread that is waiting for the array to become quiesced. |
| 768 | * access_suspend_mutex should be locked upon calling this |
| 769 | */ |
| 770 | void |
| 771 | rf_SignalQuiescenceLock(RF_Raid_t *raidPtr) |
| 772 | { |
| 773 | #if RF_DEBUG_QUIESCE |
| 774 | if (rf_quiesceDebug) { |
| 775 | printf("raid%d: Signalling quiescence lock\n" , |
| 776 | raidPtr->raidid); |
| 777 | } |
| 778 | #endif |
| 779 | raidPtr->access_suspend_release = 1; |
| 780 | |
| 781 | if (raidPtr->waiting_for_quiescence) { |
| 782 | SIGNAL_QUIESCENT_COND(raidPtr); |
| 783 | } |
| 784 | } |
| 785 | /* suspends all new requests to the array. No effect on accesses that are in flight. */ |
| 786 | int |
| 787 | rf_SuspendNewRequestsAndWait(RF_Raid_t *raidPtr) |
| 788 | { |
| 789 | #if RF_DEBUG_QUIESCE |
| 790 | if (rf_quiesceDebug) |
| 791 | printf("raid%d: Suspending new reqs\n" , raidPtr->raidid); |
| 792 | #endif |
| 793 | rf_lock_mutex2(raidPtr->access_suspend_mutex); |
| 794 | raidPtr->accesses_suspended++; |
| 795 | raidPtr->waiting_for_quiescence = (raidPtr->accs_in_flight == 0) ? 0 : 1; |
| 796 | |
| 797 | if (raidPtr->waiting_for_quiescence) { |
| 798 | raidPtr->access_suspend_release = 0; |
| 799 | while (!raidPtr->access_suspend_release) { |
| 800 | #if RF_DEBUG_QUIESCE |
| 801 | printf("raid%d: Suspending: Waiting for Quiescence\n" , |
| 802 | raidPtr->raidid); |
| 803 | #endif |
| 804 | WAIT_FOR_QUIESCENCE(raidPtr); |
| 805 | raidPtr->waiting_for_quiescence = 0; |
| 806 | } |
| 807 | } |
| 808 | #if RF_DEBUG_QUIESCE |
| 809 | printf("raid%d: Quiescence reached..\n" , raidPtr->raidid); |
| 810 | #endif |
| 811 | |
| 812 | rf_unlock_mutex2(raidPtr->access_suspend_mutex); |
| 813 | return (raidPtr->waiting_for_quiescence); |
| 814 | } |
| 815 | /* wake up everyone waiting for quiescence to be released */ |
| 816 | void |
| 817 | rf_ResumeNewRequests(RF_Raid_t *raidPtr) |
| 818 | { |
| 819 | RF_CallbackDesc_t *t, *cb; |
| 820 | |
| 821 | #if RF_DEBUG_QUIESCE |
| 822 | if (rf_quiesceDebug) |
| 823 | printf("raid%d: Resuming new requests\n" , raidPtr->raidid); |
| 824 | #endif |
| 825 | |
| 826 | rf_lock_mutex2(raidPtr->access_suspend_mutex); |
| 827 | raidPtr->accesses_suspended--; |
| 828 | if (raidPtr->accesses_suspended == 0) |
| 829 | cb = raidPtr->quiesce_wait_list; |
| 830 | else |
| 831 | cb = NULL; |
| 832 | raidPtr->quiesce_wait_list = NULL; |
| 833 | rf_unlock_mutex2(raidPtr->access_suspend_mutex); |
| 834 | |
| 835 | while (cb) { |
| 836 | t = cb; |
| 837 | cb = cb->next; |
| 838 | (t->callbackFunc) (t->callbackArg); |
| 839 | rf_FreeCallbackDesc(t); |
| 840 | } |
| 841 | } |
| 842 | /***************************************************************************************** |
| 843 | * |
| 844 | * debug routines |
| 845 | * |
| 846 | ****************************************************************************************/ |
| 847 | |
| 848 | static void |
| 849 | set_debug_option(char *name, long val) |
| 850 | { |
| 851 | RF_DebugName_t *p; |
| 852 | |
| 853 | for (p = rf_debugNames; p->name; p++) { |
| 854 | if (!strcmp(p->name, name)) { |
| 855 | *(p->ptr) = val; |
| 856 | printf("[Set debug variable %s to %ld]\n" , name, val); |
| 857 | return; |
| 858 | } |
| 859 | } |
| 860 | RF_ERRORMSG1("Unknown debug string \"%s\"\n" , name); |
| 861 | } |
| 862 | |
| 863 | |
| 864 | /* would like to use sscanf here, but apparently not available in kernel */ |
| 865 | /*ARGSUSED*/ |
| 866 | static void |
| 867 | rf_ConfigureDebug(RF_Config_t *cfgPtr) |
| 868 | { |
| 869 | char *val_p, *name_p, *white_p; |
| 870 | long val; |
| 871 | int i; |
| 872 | |
| 873 | rf_ResetDebugOptions(); |
| 874 | for (i = 0; i < RF_MAXDBGV && cfgPtr->debugVars[i][0]; i++) { |
| 875 | name_p = rf_find_non_white(&cfgPtr->debugVars[i][0]); |
| 876 | white_p = rf_find_white(name_p); /* skip to start of 2nd |
| 877 | * word */ |
| 878 | val_p = rf_find_non_white(white_p); |
| 879 | if (*val_p == '0' && *(val_p + 1) == 'x') |
| 880 | val = rf_htoi(val_p + 2); |
| 881 | else |
| 882 | val = rf_atoi(val_p); |
| 883 | *white_p = '\0'; |
| 884 | set_debug_option(name_p, val); |
| 885 | } |
| 886 | } |
| 887 | |
| 888 | void |
| 889 | rf_print_panic_message(int line, const char *file) |
| 890 | { |
| 891 | snprintf(rf_panicbuf, sizeof(rf_panicbuf), |
| 892 | "raidframe error at line %d file %s" , line, file); |
| 893 | } |
| 894 | |
| 895 | #ifdef RAID_DIAGNOSTIC |
| 896 | void |
| 897 | rf_print_assert_panic_message(int line, const char *file, const char *condition) |
| 898 | { |
| 899 | snprintf(rf_panicbuf, sizeof(rf_panicbuf), |
| 900 | "raidframe error at line %d file %s (failed asserting %s)\n" , |
| 901 | line, file, condition); |
| 902 | } |
| 903 | #endif |
| 904 | |
| 905 | void |
| 906 | rf_print_unable_to_init_mutex(const char *file, int line, int rc) |
| 907 | { |
| 908 | RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n" , |
| 909 | file, line, rc); |
| 910 | } |
| 911 | |
| 912 | void |
| 913 | rf_print_unable_to_add_shutdown(const char *file, int line, int rc) |
| 914 | { |
| 915 | RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n" , |
| 916 | file, line, rc); |
| 917 | } |
| 918 | |
| 919 | static void |
| 920 | rf_alloc_mutex_cond(RF_Raid_t *raidPtr) |
| 921 | { |
| 922 | |
| 923 | rf_init_mutex2(raidPtr->mutex, IPL_VM); |
| 924 | |
| 925 | rf_init_cond2(raidPtr->outstandingCond, "rfocond" ); |
| 926 | rf_init_mutex2(raidPtr->rad_lock, IPL_VM); |
| 927 | |
| 928 | rf_init_mutex2(raidPtr->access_suspend_mutex, IPL_VM); |
| 929 | rf_init_cond2(raidPtr->access_suspend_cv, "rfquiesce" ); |
| 930 | |
| 931 | rf_init_cond2(raidPtr->waitForReconCond, "rfrcnw" ); |
| 932 | |
| 933 | rf_init_cond2(raidPtr->adding_hot_spare_cv, "raidhs" ); |
| 934 | } |
| 935 | |
| 936 | static void |
| 937 | rf_destroy_mutex_cond(RF_Raid_t *raidPtr) |
| 938 | { |
| 939 | |
| 940 | rf_destroy_cond2(raidPtr->waitForReconCond); |
| 941 | rf_destroy_cond2(raidPtr->adding_hot_spare_cv); |
| 942 | |
| 943 | rf_destroy_mutex2(raidPtr->access_suspend_mutex); |
| 944 | rf_destroy_cond2(raidPtr->access_suspend_cv); |
| 945 | |
| 946 | rf_destroy_cond2(raidPtr->outstandingCond); |
| 947 | rf_destroy_mutex2(raidPtr->rad_lock); |
| 948 | |
| 949 | rf_destroy_mutex2(raidPtr->mutex); |
| 950 | } |
| 951 | |