1 /* $NetBSD: raidframevar.h,v 1.7 2004/06/02 22:58:28 drochner Exp $ */ 2 /*- 3 * Copyright (c) 1996, 1997, 1998 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 * Copyright (c) 1995 Carnegie-Mellon University. 39 * All rights reserved. 40 * 41 * Author: Mark Holland 42 * 43 * Permission to use, copy, modify and distribute this software and 44 * its documentation is hereby granted, provided that both the copyright 45 * notice and this permission notice appear in all copies of the 46 * software, derivative works or modified versions, and any portions 47 * thereof, and that both notices appear in supporting documentation. 48 * 49 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 50 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 51 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 52 * 53 * Carnegie Mellon requests users of this software to return to 54 * 55 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 56 * School of Computer Science 57 * Carnegie Mellon University 58 * Pittsburgh PA 15213-3890 59 * 60 * any improvements or extensions that they make and grant Carnegie the 61 * rights to redistribute these changes. 62 */ 63 64 /* 65 * Copyright (c) 1995 Carnegie-Mellon University. 66 * All rights reserved. 67 * 68 * Author: Jim Zelenka 69 * 70 * Permission to use, copy, modify and distribute this software and 71 * its documentation is hereby granted, provided that both the copyright 72 * notice and this permission notice appear in all copies of the 73 * software, derivative works or modified versions, and any portions 74 * thereof, and that both notices appear in supporting documentation. 75 * 76 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 77 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 78 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 79 * 80 * Carnegie Mellon requests users of this software to return to 81 * 82 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 83 * School of Computer Science 84 * Carnegie Mellon University 85 * Pittsburgh PA 15213-3890 86 * 87 * any improvements or extensions that they make and grant Carnegie the 88 * rights to redistribute these changes. 89 */ 90 91 /***************************************************** 92 * 93 * raidframevar.h 94 * 95 * main header file for using raidframe in the kernel. 96 * 97 *****************************************************/ 98 99 100 #ifndef _RF_RAIDFRAMEVAR_H_ 101 #define _RF_RAIDFRAMEVAR_H_ 102 103 #ifndef _STANDALONE 104 #include <sys/ioctl.h> 105 106 #include <sys/errno.h> 107 #include <sys/types.h> 108 109 #include <sys/uio.h> 110 #include <sys/param.h> 111 #include <sys/proc.h> 112 #include <sys/lock.h> 113 114 #include <sys/mallocvar.h> 115 #endif 116 117 /* 118 * First, define system-dependent types and constants. 119 * 120 * If the machine is big-endian, RF_BIG_ENDIAN should be 1. 121 * Otherwise, it should be 0. 122 * 123 * The various integer types should be self-explanatory; we 124 * use these elsewhere to avoid size confusion. 125 * 126 * LONGSHIFT is lg(sizeof(long)) (that is, log base two of sizeof(long) 127 * 128 */ 129 130 #include <sys/types.h> 131 #include <machine/endian.h> 132 #include <machine/limits.h> 133 134 #if BYTE_ORDER == BIG_ENDIAN 135 #define RF_IS_BIG_ENDIAN 1 136 #elif BYTE_ORDER == LITTLE_ENDIAN 137 #define RF_IS_BIG_ENDIAN 0 138 #else 139 #error byte order not defined 140 #endif 141 typedef int8_t RF_int8; 142 typedef u_int8_t RF_uint8; 143 typedef int16_t RF_int16; 144 typedef u_int16_t RF_uint16; 145 typedef int32_t RF_int32; 146 typedef u_int32_t RF_uint32; 147 typedef int64_t RF_int64; 148 typedef u_int64_t RF_uint64; 149 #if LONG_BIT == 32 150 #define RF_LONGSHIFT 2 151 #elif LONG_BIT == 64 152 #define RF_LONGSHIFT 3 153 #else 154 #error word size not defined 155 #endif 156 157 /* 158 * These are just zero and non-zero. We don't use "TRUE" 159 * and "FALSE" because there's too much nonsense trying 160 * to get them defined exactly once on every platform, given 161 * the different places they may be defined in system header 162 * files. 163 */ 164 #define RF_TRUE 1 165 #define RF_FALSE 0 166 167 /* Malloc types. */ 168 #ifdef _KERNEL 169 MALLOC_DECLARE(M_RAIDFRAME); 170 #endif 171 172 /* 173 * Now, some generic types 174 */ 175 typedef RF_uint64 RF_IoCount_t; 176 typedef RF_uint64 RF_Offset_t; 177 typedef RF_uint32 RF_PSSFlags_t; 178 typedef RF_uint64 RF_SectorCount_t; 179 typedef RF_uint64 RF_StripeCount_t; 180 typedef RF_int64 RF_SectorNum_t;/* these are unsigned so we can set them to 181 * (-1) for "uninitialized" */ 182 typedef RF_int64 RF_StripeNum_t; 183 typedef RF_int64 RF_RaidAddr_t; 184 typedef int RF_RowCol_t; /* unsigned so it can be (-1) */ 185 typedef RF_int64 RF_HeadSepLimit_t; 186 typedef RF_int64 RF_ReconUnitCount_t; 187 typedef int RF_ReconUnitNum_t; 188 189 typedef char RF_ParityConfig_t; 190 191 typedef char RF_DiskQueueType_t[1024]; 192 #define RF_DISK_QUEUE_TYPE_NONE "" 193 194 /* values for the 'type' field in a reconstruction buffer */ 195 typedef int RF_RbufType_t; 196 #define RF_RBUF_TYPE_EXCLUSIVE 0 /* this buf assigned exclusively to 197 * one disk */ 198 #define RF_RBUF_TYPE_FLOATING 1 /* this is a floating recon buf */ 199 #define RF_RBUF_TYPE_FORCED 2 /* this rbuf was allocated to complete 200 * a forced recon */ 201 202 typedef char RF_IoType_t; 203 #define RF_IO_TYPE_READ 'r' 204 #define RF_IO_TYPE_WRITE 'w' 205 #define RF_IO_TYPE_NOP 'n' 206 #define RF_IO_IS_R_OR_W(_type_) (((_type_) == RF_IO_TYPE_READ) \ 207 || ((_type_) == RF_IO_TYPE_WRITE)) 208 209 typedef void (*RF_VoidFuncPtr) (void *,...); 210 211 typedef RF_uint32 RF_AccessStripeMapFlags_t; 212 typedef RF_uint32 RF_DiskQueueDataFlags_t; 213 typedef RF_uint32 RF_DiskQueueFlags_t; 214 typedef RF_uint32 RF_RaidAccessFlags_t; 215 216 #define RF_DISKQUEUE_DATA_FLAGS_NONE ((RF_DiskQueueDataFlags_t)0) 217 218 typedef struct RF_AccessStripeMap_s RF_AccessStripeMap_t; 219 typedef struct RF_AccessStripeMapHeader_s RF_AccessStripeMapHeader_t; 220 typedef struct RF_AllocListElem_s RF_AllocListElem_t; 221 typedef struct RF_CallbackDesc_s RF_CallbackDesc_t; 222 typedef struct RF_ChunkDesc_s RF_ChunkDesc_t; 223 typedef struct RF_CommonLogData_s RF_CommonLogData_t; 224 typedef struct RF_Config_s RF_Config_t; 225 typedef struct RF_CumulativeStats_s RF_CumulativeStats_t; 226 typedef struct RF_DagHeader_s RF_DagHeader_t; 227 typedef struct RF_DagList_s RF_DagList_t; 228 typedef struct RF_DagNode_s RF_DagNode_t; 229 typedef struct RF_DeclusteredConfigInfo_s RF_DeclusteredConfigInfo_t; 230 typedef struct RF_DiskId_s RF_DiskId_t; 231 typedef struct RF_DiskMap_s RF_DiskMap_t; 232 typedef struct RF_DiskQueue_s RF_DiskQueue_t; 233 typedef struct RF_DiskQueueData_s RF_DiskQueueData_t; 234 typedef struct RF_DiskQueueSW_s RF_DiskQueueSW_t; 235 typedef struct RF_Etimer_s RF_Etimer_t; 236 typedef struct RF_EventCreate_s RF_EventCreate_t; 237 typedef struct RF_FreeList_s RF_FreeList_t; 238 typedef struct RF_LockReqDesc_s RF_LockReqDesc_t; 239 typedef struct RF_LockTableEntry_s RF_LockTableEntry_t; 240 typedef struct RF_MCPair_s RF_MCPair_t; 241 typedef struct RF_OwnerInfo_s RF_OwnerInfo_t; 242 typedef struct RF_ParityLog_s RF_ParityLog_t; 243 typedef struct RF_ParityLogAppendQueue_s RF_ParityLogAppendQueue_t; 244 typedef struct RF_ParityLogData_s RF_ParityLogData_t; 245 typedef struct RF_ParityLogDiskQueue_s RF_ParityLogDiskQueue_t; 246 typedef struct RF_ParityLogQueue_s RF_ParityLogQueue_t; 247 typedef struct RF_ParityLogRecord_s RF_ParityLogRecord_t; 248 typedef struct RF_PerDiskReconCtrl_s RF_PerDiskReconCtrl_t; 249 typedef struct RF_PSStatusHeader_s RF_PSStatusHeader_t; 250 typedef struct RF_PhysDiskAddr_s RF_PhysDiskAddr_t; 251 typedef struct RF_PropHeader_s RF_PropHeader_t; 252 typedef struct RF_Raid_s RF_Raid_t; 253 typedef struct RF_RaidAccessDesc_s RF_RaidAccessDesc_t; 254 typedef struct RF_RaidDisk_s RF_RaidDisk_t; 255 typedef struct RF_RaidLayout_s RF_RaidLayout_t; 256 typedef struct RF_RaidReconDesc_s RF_RaidReconDesc_t; 257 typedef struct RF_ReconBuffer_s RF_ReconBuffer_t; 258 typedef struct RF_ReconConfig_s RF_ReconConfig_t; 259 typedef struct RF_ReconCtrl_s RF_ReconCtrl_t; 260 typedef struct RF_ReconDoneProc_s RF_ReconDoneProc_t; 261 typedef struct RF_ReconEvent_s RF_ReconEvent_t; 262 typedef struct RF_ReconMap_s RF_ReconMap_t; 263 typedef struct RF_ReconMapListElem_s RF_ReconMapListElem_t; 264 typedef struct RF_ReconParityStripeStatus_s RF_ReconParityStripeStatus_t; 265 typedef struct RF_RedFuncs_s RF_RedFuncs_t; 266 typedef struct RF_RegionBufferQueue_s RF_RegionBufferQueue_t; 267 typedef struct RF_RegionInfo_s RF_RegionInfo_t; 268 typedef struct RF_ShutdownList_s RF_ShutdownList_t; 269 typedef struct RF_SpareTableEntry_s RF_SpareTableEntry_t; 270 typedef struct RF_SparetWait_s RF_SparetWait_t; 271 typedef struct RF_StripeLockDesc_s RF_StripeLockDesc_t; 272 typedef struct RF_ThreadGroup_s RF_ThreadGroup_t; 273 typedef struct RF_ThroughputStats_s RF_ThroughputStats_t; 274 275 /* 276 * Important assumptions regarding ordering of the states in this list 277 * have been made!!! Before disturbing this ordering, look at code in 278 * sys/dev/raidframe/rf_states.c 279 */ 280 typedef enum RF_AccessState_e { 281 /* original states */ 282 rf_QuiesceState, /* handles queisence for reconstruction */ 283 rf_IncrAccessesCountState, /* count accesses in flight */ 284 rf_MapState, /* map access to disk addresses */ 285 rf_LockState, /* take stripe locks */ 286 rf_CreateDAGState, /* create DAGs */ 287 rf_ExecuteDAGState, /* execute DAGs */ 288 rf_ProcessDAGState, /* DAGs are completing- check if correct, 289 * or if we need to retry */ 290 rf_CleanupState, /* release stripe locks, clean up */ 291 rf_DecrAccessesCountState, 292 rf_LastState /* must be the last state */ 293 } RF_AccessState_t; 294 295 296 /* Some constants related to RAIDframe. These are arbitrary and 297 can be modified at will. */ 298 299 #define RF_MAXROW 10 300 #define RF_MAXCOL 40 301 #define RF_MAXSPARE 10 302 #define RF_MAXDBGV 75 /* max number of debug variables */ 303 #define RF_MAX_DISKS 128 /* max disks per array */ 304 #define RF_SPAREMAP_NAME_LEN 128 305 #define RF_PROTECTED_SECTORS 64L /* # of sectors at start of disk to 306 exclude from RAID address space */ 307 308 struct RF_SpareTableEntry_s { 309 u_int spareDisk; /* disk to which this block is spared */ 310 u_int spareBlockOffsetInSUs; /* offset into spare table for that 311 * disk */ 312 }; 313 314 union RF_GenericParam_u { 315 void *p; 316 RF_uint64 v; 317 }; 318 typedef union RF_GenericParam_u RF_DagParam_t; 319 typedef union RF_GenericParam_u RF_CBParam_t; 320 321 /* the raidframe configuration, passed down through an ioctl. 322 * the driver can be reconfigured (with total loss of data) at any time, 323 * but it must be shut down first. 324 */ 325 struct RF_Config_s { 326 RF_RowCol_t numRow, numCol, numSpare; /* number of rows, columns, 327 * and spare disks */ 328 dev_t devs[RF_MAXROW][RF_MAXCOL]; /* device numbers for disks 329 * comprising array */ 330 char devnames[RF_MAXROW][RF_MAXCOL][50]; /* device names */ 331 dev_t spare_devs[RF_MAXSPARE]; /* device numbers for spare 332 * disks */ 333 char spare_names[RF_MAXSPARE][50]; /* device names */ 334 RF_SectorNum_t sectPerSU; /* sectors per stripe unit */ 335 RF_StripeNum_t SUsPerPU;/* stripe units per parity unit */ 336 RF_StripeNum_t SUsPerRU;/* stripe units per reconstruction unit */ 337 RF_ParityConfig_t parityConfig; /* identifies the RAID architecture to 338 * be used */ 339 RF_DiskQueueType_t diskQueueType; /* 'f' = fifo, 'c' = cvscan, 340 * not used in kernel */ 341 char maxOutstandingDiskReqs; /* # concurrent reqs to be sent to a 342 * disk. not used in kernel. */ 343 char debugVars[RF_MAXDBGV][50]; /* space for specifying debug 344 * variables & their values */ 345 unsigned int layoutSpecificSize; /* size in bytes of 346 * layout-specific info */ 347 void *layoutSpecific; /* a pointer to a layout-specific structure to 348 * be copied in */ 349 int force; /* if !0, ignore many fatal 350 configuration conditions */ 351 /* 352 "force" is used to override cases where the component labels would 353 indicate that configuration should not proceed without user 354 intervention 355 */ 356 }; 357 358 typedef RF_uint32 RF_ReconReqFlags_t; 359 /* flags that can be put in the rf_recon_req structure */ 360 #define RF_FDFLAGS_NONE 0x0 /* just fail the disk */ 361 #define RF_FDFLAGS_RECON 0x1 /* fail and initiate recon */ 362 363 struct rf_recon_req { /* used to tell the kernel to fail a disk */ 364 RF_RowCol_t row, col; 365 RF_ReconReqFlags_t flags; 366 void *raidPtr; /* used internally; need not be set at ioctl 367 * time */ 368 struct rf_recon_req *next; /* used internally; need not be set at 369 * ioctl time */ 370 }; 371 372 struct RF_SparetWait_s { 373 int C, G, fcol; /* C = # disks in row, G = # units in stripe, 374 * fcol = which disk has failed */ 375 376 RF_StripeCount_t SUsPerPU; /* this stuff is the info required to 377 * create a spare table */ 378 int TablesPerSpareRegion; 379 int BlocksPerTable; 380 RF_StripeCount_t TableDepthInPUs; 381 RF_StripeCount_t SpareSpaceDepthPerRegionInSUs; 382 383 RF_SparetWait_t *next; /* used internally; need not be set at ioctl 384 * time */ 385 }; 386 /* 387 * A physical disk can be in one of several states: 388 * IF YOU ADD A STATE, CHECK TO SEE IF YOU NEED TO MODIFY RF_DEAD_DISK(). 389 */ 390 enum RF_DiskStatus_e { 391 rf_ds_optimal, /* no problems */ 392 rf_ds_failed, /* reconstruction ongoing */ 393 rf_ds_reconstructing, /* reconstruction complete to spare, dead disk 394 * not yet replaced */ 395 rf_ds_dist_spared, /* reconstruction complete to distributed 396 * spare space, dead disk not yet replaced */ 397 rf_ds_spared, /* reconstruction complete to distributed 398 * spare space, dead disk not yet replaced */ 399 rf_ds_spare, /* an available spare disk */ 400 rf_ds_used_spare /* a spare which has been used, and hence is 401 * not available */ 402 }; 403 typedef enum RF_DiskStatus_e RF_DiskStatus_t; 404 405 struct RF_RaidDisk_s { 406 char devname[56]; /* name of device file */ 407 RF_DiskStatus_t status; /* whether it is up or down */ 408 RF_RowCol_t spareRow; /* if in status "spared", this identifies the 409 * spare disk */ 410 RF_RowCol_t spareCol; /* if in status "spared", this identifies the 411 * spare disk */ 412 RF_SectorCount_t numBlocks; /* number of blocks, obtained via READ 413 * CAPACITY */ 414 int blockSize; 415 RF_SectorCount_t partitionSize; /* The *actual* and *full* size of 416 the partition, from the disklabel */ 417 int auto_configured;/* 1 if this component was autoconfigured. 418 0 otherwise. */ 419 dev_t dev; 420 }; 421 /* The per-component label information that the user can set */ 422 typedef struct RF_ComponentInfo_s { 423 int row; /* the row number of this component */ 424 int column; /* the column number of this component */ 425 int serial_number; /* a user-specified serial number for this 426 RAID set */ 427 } RF_ComponentInfo_t; 428 429 /* The per-component label information */ 430 typedef struct RF_ComponentLabel_s { 431 int version; /* The version of this label. */ 432 int serial_number; /* a user-specified serial number for this 433 RAID set */ 434 int mod_counter; /* modification counter. Changed (usually 435 by incrementing) every time the label 436 is changed */ 437 int row; /* the row number of this component */ 438 int column; /* the column number of this component */ 439 int num_rows; /* number of rows in this RAID set */ 440 int num_columns; /* number of columns in this RAID set */ 441 int clean; /* 1 when clean, 0 when dirty */ 442 int status; /* rf_ds_optimal, rf_ds_dist_spared, whatever. */ 443 /* stuff that will be in version 2 of the label */ 444 int sectPerSU; /* Sectors per Stripe Unit */ 445 int SUsPerPU; /* Stripe Units per Parity Units */ 446 int SUsPerRU; /* Stripe Units per Reconstruction Units */ 447 int parityConfig; /* '0' == RAID0, '1' == RAID1, etc. */ 448 int maxOutstanding; /* maxOutstanding disk requests */ 449 int blockSize; /* size of component block. 450 (disklabel->d_secsize) */ 451 int numBlocks; /* number of blocks on this component. May 452 be smaller than the partition size. */ 453 int partitionSize; /* number of blocks on this *partition*. 454 Must exactly match the partition size 455 from the disklabel. */ 456 int future_use[33]; /* Future expansion */ 457 int autoconfigure; /* automatically configure this RAID set. 458 0 == no, 1 == yes */ 459 int root_partition; /* Use this set as / 460 0 == no, 1 == yes*/ 461 int last_unit; /* last unit number (e.g. 0 for /dev/raid0) 462 of this component. Used for autoconfigure 463 only. */ 464 int config_order; /* 0 .. n. The order in which the component 465 should be auto-configured. E.g. 0 is will 466 done first, (and would become raid0). 467 This may be in conflict with last_unit!!?! */ 468 /* Not currently used. */ 469 int future_use2[44]; /* More future expansion */ 470 } RF_ComponentLabel_t; 471 472 typedef struct RF_SingleComponent_s { 473 int row; 474 int column; 475 char component_name[50]; /* name of the component */ 476 } RF_SingleComponent_t; 477 478 typedef struct RF_DeviceConfig_s { 479 u_int rows; 480 u_int cols; 481 u_int maxqdepth; 482 int ndevs; 483 RF_RaidDisk_t devs[RF_MAX_DISKS]; 484 int nspares; 485 RF_RaidDisk_t spares[RF_MAX_DISKS]; 486 } RF_DeviceConfig_t; 487 488 typedef struct RF_ProgressInfo_s { 489 RF_uint64 remaining; 490 RF_uint64 completed; 491 RF_uint64 total; 492 } RF_ProgressInfo_t; 493 494 #ifndef _STANDALONE 495 typedef struct RF_LayoutSW_s { 496 RF_ParityConfig_t parityConfig; 497 const char *configName; 498 499 #ifndef _KERNEL 500 /* layout-specific parsing */ 501 int (*MakeLayoutSpecific) (FILE * fp, RF_Config_t * cfgPtr, 502 void *arg); 503 void *makeLayoutSpecificArg; 504 #else /* !KERNEL */ 505 506 /* initialization routine */ 507 int (*Configure) (RF_ShutdownList_t ** shutdownListp, 508 RF_Raid_t * raidPtr, RF_Config_t * cfgPtr); 509 510 /* routine to map RAID sector address -> physical (row, col, offset) */ 511 void (*MapSector) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 512 RF_RowCol_t * col, 513 RF_SectorNum_t * diskSector, int remap); 514 515 /* routine to map RAID sector address -> physical (r,c,o) of parity 516 * unit */ 517 void (*MapParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 518 RF_RowCol_t * col, 519 RF_SectorNum_t * diskSector, int remap); 520 521 /* routine to map RAID sector address -> physical (r,c,o) of Q unit */ 522 void (*MapQ) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 523 RF_RowCol_t * col, 524 RF_SectorNum_t * diskSector, int remap); 525 526 /* routine to identify the disks comprising a stripe */ 527 void (*IdentifyStripe) (RF_Raid_t * raidPtr, RF_RaidAddr_t addr, 528 RF_RowCol_t ** diskids); 529 530 /* routine to select a dag */ 531 void (*SelectionFunc) (RF_Raid_t * raidPtr, RF_IoType_t type, 532 RF_AccessStripeMap_t * asmap, 533 RF_VoidFuncPtr *); 534 535 /* map a stripe ID to a parity stripe ID. This is typically the 536 * identity mapping */ 537 void (*MapSIDToPSID) (RF_RaidLayout_t * layoutPtr, 538 RF_StripeNum_t stripeID, 539 RF_StripeNum_t * psID, 540 RF_ReconUnitNum_t * which_ru); 541 542 /* get default head separation limit (may be NULL) */ 543 RF_HeadSepLimit_t(*GetDefaultHeadSepLimit) (RF_Raid_t * raidPtr); 544 545 /* get default num recon buffers (may be NULL) */ 546 int (*GetDefaultNumFloatingReconBuffers) (RF_Raid_t * raidPtr); 547 548 /* get number of spare recon units (may be NULL) */ 549 RF_ReconUnitCount_t(*GetNumSpareRUs) (RF_Raid_t * raidPtr); 550 551 /* spare table installation (may be NULL) */ 552 int (*InstallSpareTable) (RF_Raid_t * raidPtr, RF_RowCol_t frow, 553 RF_RowCol_t fcol); 554 555 /* recon buffer submission function */ 556 int (*SubmitReconBuffer) (RF_ReconBuffer_t * rbuf, int keep_it, 557 int use_committed); 558 559 /* 560 * verify that parity information for a stripe is correct 561 * see rf_parityscan.h for return vals 562 */ 563 int (*VerifyParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidAddr, 564 RF_PhysDiskAddr_t * parityPDA, 565 int correct_it, RF_RaidAccessFlags_t flags); 566 567 /* number of faults tolerated by this mapping */ 568 int faultsTolerated; 569 570 /* states to step through in an access. Must end with "LastState". The 571 * default is DefaultStates in rf_layout.c */ 572 const RF_AccessState_t *states; 573 574 RF_AccessStripeMapFlags_t flags; 575 #endif /* !KERNEL */ 576 } RF_LayoutSW_t; 577 #endif 578 579 #endif /* !_RF_RAIDFRAMEVAR_H_ */ 580