1 /* $NetBSD: raidframevar.h,v 1.12 2008/04/28 20:23:56 martin 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 * 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 * Copyright (c) 1995 Carnegie-Mellon University. 32 * All rights reserved. 33 * 34 * Author: Mark Holland 35 * 36 * Permission to use, copy, modify and distribute this software and 37 * its documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 44 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie the 54 * rights to redistribute these changes. 55 */ 56 57 /* 58 * Copyright (c) 1995 Carnegie-Mellon University. 59 * All rights reserved. 60 * 61 * Author: Jim Zelenka 62 * 63 * Permission to use, copy, modify and distribute this software and 64 * its documentation is hereby granted, provided that both the copyright 65 * notice and this permission notice appear in all copies of the 66 * software, derivative works or modified versions, and any portions 67 * thereof, and that both notices appear in supporting documentation. 68 * 69 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 70 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 71 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 72 * 73 * Carnegie Mellon requests users of this software to return to 74 * 75 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 76 * School of Computer Science 77 * Carnegie Mellon University 78 * Pittsburgh PA 15213-3890 79 * 80 * any improvements or extensions that they make and grant Carnegie the 81 * rights to redistribute these changes. 82 */ 83 84 /***************************************************** 85 * 86 * raidframevar.h 87 * 88 * main header file for using raidframe in the kernel. 89 * 90 *****************************************************/ 91 92 93 #ifndef _RF_RAIDFRAMEVAR_H_ 94 #define _RF_RAIDFRAMEVAR_H_ 95 96 #ifndef _STANDALONE 97 #include <sys/ioctl.h> 98 99 #include <sys/errno.h> 100 #include <sys/types.h> 101 102 #include <sys/uio.h> 103 #include <sys/param.h> 104 #include <sys/proc.h> 105 #include <sys/simplelock.h> 106 107 #include <sys/mallocvar.h> 108 #endif 109 110 /* 111 * First, define system-dependent types and constants. 112 * 113 * If the machine is big-endian, RF_BIG_ENDIAN should be 1. 114 * Otherwise, it should be 0. 115 * 116 * The various integer types should be self-explanatory; we 117 * use these elsewhere to avoid size confusion. 118 * 119 * LONGSHIFT is lg(sizeof(long)) (that is, log base two of sizeof(long) 120 * 121 */ 122 123 #include <sys/types.h> 124 #include <machine/endian.h> 125 #include <machine/limits.h> 126 127 #if BYTE_ORDER == BIG_ENDIAN 128 #define RF_IS_BIG_ENDIAN 1 129 #elif BYTE_ORDER == LITTLE_ENDIAN 130 #define RF_IS_BIG_ENDIAN 0 131 #else 132 #error byte order not defined 133 #endif 134 typedef int8_t RF_int8; 135 typedef u_int8_t RF_uint8; 136 typedef int16_t RF_int16; 137 typedef u_int16_t RF_uint16; 138 typedef int32_t RF_int32; 139 typedef u_int32_t RF_uint32; 140 typedef int64_t RF_int64; 141 typedef u_int64_t RF_uint64; 142 #if LONG_BIT == 32 143 #define RF_LONGSHIFT 2 144 #elif LONG_BIT == 64 145 #define RF_LONGSHIFT 3 146 #else 147 #error word size not defined 148 #endif 149 150 /* 151 * These are just zero and non-zero. We don't use "TRUE" 152 * and "FALSE" because there's too much nonsense trying 153 * to get them defined exactly once on every platform, given 154 * the different places they may be defined in system header 155 * files. 156 */ 157 #define RF_TRUE 1 158 #define RF_FALSE 0 159 160 /* Malloc types. */ 161 #ifdef _KERNEL 162 MALLOC_DECLARE(M_RAIDFRAME); 163 #endif 164 165 /* 166 * Now, some generic types 167 */ 168 typedef RF_uint64 RF_IoCount_t; 169 typedef RF_uint64 RF_Offset_t; 170 typedef RF_uint32 RF_PSSFlags_t; 171 typedef RF_uint64 RF_SectorCount_t; 172 typedef RF_uint64 RF_StripeCount_t; 173 typedef RF_int64 RF_SectorNum_t;/* these are unsigned so we can set them to 174 * (-1) for "uninitialized" */ 175 typedef RF_int64 RF_StripeNum_t; 176 typedef RF_int64 RF_RaidAddr_t; 177 typedef int RF_RowCol_t; /* unsigned so it can be (-1) */ 178 typedef RF_int64 RF_HeadSepLimit_t; 179 typedef RF_int64 RF_ReconUnitCount_t; 180 typedef int RF_ReconUnitNum_t; 181 182 typedef char RF_ParityConfig_t; 183 184 typedef char RF_DiskQueueType_t[1024]; 185 #define RF_DISK_QUEUE_TYPE_NONE "" 186 187 /* values for the 'type' field in a reconstruction buffer */ 188 typedef int RF_RbufType_t; 189 #define RF_RBUF_TYPE_EXCLUSIVE 0 /* this buf assigned exclusively to 190 * one disk */ 191 #define RF_RBUF_TYPE_FLOATING 1 /* this is a floating recon buf */ 192 #define RF_RBUF_TYPE_FORCED 2 /* this rbuf was allocated to complete 193 * a forced recon */ 194 195 typedef char RF_IoType_t; 196 #define RF_IO_TYPE_READ 'r' 197 #define RF_IO_TYPE_WRITE 'w' 198 #define RF_IO_TYPE_NOP 'n' 199 #define RF_IO_IS_R_OR_W(_type_) (((_type_) == RF_IO_TYPE_READ) \ 200 || ((_type_) == RF_IO_TYPE_WRITE)) 201 202 typedef void (*RF_VoidFuncPtr) (void *,...); 203 204 typedef RF_uint32 RF_AccessStripeMapFlags_t; 205 typedef RF_uint32 RF_DiskQueueDataFlags_t; 206 typedef RF_uint32 RF_DiskQueueFlags_t; 207 typedef RF_uint32 RF_RaidAccessFlags_t; 208 209 #define RF_DISKQUEUE_DATA_FLAGS_NONE ((RF_DiskQueueDataFlags_t)0) 210 211 typedef struct RF_AccessStripeMap_s RF_AccessStripeMap_t; 212 typedef struct RF_AccessStripeMapHeader_s RF_AccessStripeMapHeader_t; 213 typedef struct RF_AllocListElem_s RF_AllocListElem_t; 214 typedef struct RF_CallbackDesc_s RF_CallbackDesc_t; 215 typedef struct RF_ChunkDesc_s RF_ChunkDesc_t; 216 typedef struct RF_CommonLogData_s RF_CommonLogData_t; 217 typedef struct RF_Config_s RF_Config_t; 218 typedef struct RF_CumulativeStats_s RF_CumulativeStats_t; 219 typedef struct RF_DagHeader_s RF_DagHeader_t; 220 typedef struct RF_DagList_s RF_DagList_t; 221 typedef struct RF_DagNode_s RF_DagNode_t; 222 typedef struct RF_DeclusteredConfigInfo_s RF_DeclusteredConfigInfo_t; 223 typedef struct RF_DiskId_s RF_DiskId_t; 224 typedef struct RF_DiskMap_s RF_DiskMap_t; 225 typedef struct RF_DiskQueue_s RF_DiskQueue_t; 226 typedef struct RF_DiskQueueData_s RF_DiskQueueData_t; 227 typedef struct RF_DiskQueueSW_s RF_DiskQueueSW_t; 228 typedef struct RF_Etimer_s RF_Etimer_t; 229 typedef struct RF_EventCreate_s RF_EventCreate_t; 230 typedef struct RF_FreeList_s RF_FreeList_t; 231 typedef struct RF_LockReqDesc_s RF_LockReqDesc_t; 232 typedef struct RF_LockTableEntry_s RF_LockTableEntry_t; 233 typedef struct RF_MCPair_s RF_MCPair_t; 234 typedef struct RF_OwnerInfo_s RF_OwnerInfo_t; 235 typedef struct RF_ParityLog_s RF_ParityLog_t; 236 typedef struct RF_ParityLogAppendQueue_s RF_ParityLogAppendQueue_t; 237 typedef struct RF_ParityLogData_s RF_ParityLogData_t; 238 typedef struct RF_ParityLogDiskQueue_s RF_ParityLogDiskQueue_t; 239 typedef struct RF_ParityLogQueue_s RF_ParityLogQueue_t; 240 typedef struct RF_ParityLogRecord_s RF_ParityLogRecord_t; 241 typedef struct RF_PerDiskReconCtrl_s RF_PerDiskReconCtrl_t; 242 typedef struct RF_PSStatusHeader_s RF_PSStatusHeader_t; 243 typedef struct RF_PhysDiskAddr_s RF_PhysDiskAddr_t; 244 typedef struct RF_PropHeader_s RF_PropHeader_t; 245 typedef struct RF_Raid_s RF_Raid_t; 246 typedef struct RF_RaidAccessDesc_s RF_RaidAccessDesc_t; 247 typedef struct RF_RaidDisk_s RF_RaidDisk_t; 248 typedef struct RF_RaidLayout_s RF_RaidLayout_t; 249 typedef struct RF_RaidReconDesc_s RF_RaidReconDesc_t; 250 typedef struct RF_ReconBuffer_s RF_ReconBuffer_t; 251 typedef struct RF_ReconConfig_s RF_ReconConfig_t; 252 typedef struct RF_ReconCtrl_s RF_ReconCtrl_t; 253 typedef struct RF_ReconDoneProc_s RF_ReconDoneProc_t; 254 typedef struct RF_ReconEvent_s RF_ReconEvent_t; 255 typedef struct RF_ReconMap_s RF_ReconMap_t; 256 typedef struct RF_ReconMapListElem_s RF_ReconMapListElem_t; 257 typedef struct RF_ReconParityStripeStatus_s RF_ReconParityStripeStatus_t; 258 typedef struct RF_RedFuncs_s RF_RedFuncs_t; 259 typedef struct RF_RegionBufferQueue_s RF_RegionBufferQueue_t; 260 typedef struct RF_RegionInfo_s RF_RegionInfo_t; 261 typedef struct RF_ShutdownList_s RF_ShutdownList_t; 262 typedef struct RF_SpareTableEntry_s RF_SpareTableEntry_t; 263 typedef struct RF_SparetWait_s RF_SparetWait_t; 264 typedef struct RF_StripeLockDesc_s RF_StripeLockDesc_t; 265 typedef struct RF_ThreadGroup_s RF_ThreadGroup_t; 266 typedef struct RF_ThroughputStats_s RF_ThroughputStats_t; 267 268 /* 269 * Important assumptions regarding ordering of the states in this list 270 * have been made!!! Before disturbing this ordering, look at code in 271 * sys/dev/raidframe/rf_states.c 272 */ 273 typedef enum RF_AccessState_e { 274 /* original states */ 275 rf_QuiesceState, /* handles queisence for reconstruction */ 276 rf_IncrAccessesCountState, /* count accesses in flight */ 277 rf_MapState, /* map access to disk addresses */ 278 rf_LockState, /* take stripe locks */ 279 rf_CreateDAGState, /* create DAGs */ 280 rf_ExecuteDAGState, /* execute DAGs */ 281 rf_ProcessDAGState, /* DAGs are completing- check if correct, 282 * or if we need to retry */ 283 rf_CleanupState, /* release stripe locks, clean up */ 284 rf_DecrAccessesCountState, 285 rf_LastState /* must be the last state */ 286 } RF_AccessState_t; 287 288 289 /* Some constants related to RAIDframe. These are arbitrary and 290 can be modified at will. */ 291 292 #define RF_MAXROW 10 293 #define RF_MAXCOL 40 294 #define RF_MAXSPARE 10 295 #define RF_MAXDBGV 75 /* max number of debug variables */ 296 #define RF_MAX_DISKS 128 /* max disks per array */ 297 #define RF_SPAREMAP_NAME_LEN 128 298 #define RF_PROTECTED_SECTORS 64L /* # of sectors at start of disk to 299 exclude from RAID address space */ 300 301 struct RF_SpareTableEntry_s { 302 u_int spareDisk; /* disk to which this block is spared */ 303 u_int spareBlockOffsetInSUs; /* offset into spare table for that 304 * disk */ 305 }; 306 307 union RF_GenericParam_u { 308 void *p; 309 RF_uint64 v; 310 }; 311 typedef union RF_GenericParam_u RF_DagParam_t; 312 typedef union RF_GenericParam_u RF_CBParam_t; 313 314 /* the raidframe configuration, passed down through an ioctl. 315 * the driver can be reconfigured (with total loss of data) at any time, 316 * but it must be shut down first. 317 */ 318 struct RF_Config_s { 319 RF_RowCol_t numRow, numCol, numSpare; /* number of rows, columns, 320 * and spare disks */ 321 dev_t devs[RF_MAXROW][RF_MAXCOL]; /* device numbers for disks 322 * comprising array */ 323 char devnames[RF_MAXROW][RF_MAXCOL][50]; /* device names */ 324 dev_t spare_devs[RF_MAXSPARE]; /* device numbers for spare 325 * disks */ 326 char spare_names[RF_MAXSPARE][50]; /* device names */ 327 RF_SectorNum_t sectPerSU; /* sectors per stripe unit */ 328 RF_StripeNum_t SUsPerPU;/* stripe units per parity unit */ 329 RF_StripeNum_t SUsPerRU;/* stripe units per reconstruction unit */ 330 RF_ParityConfig_t parityConfig; /* identifies the RAID architecture to 331 * be used */ 332 RF_DiskQueueType_t diskQueueType; /* 'f' = fifo, 'c' = cvscan, 333 * not used in kernel */ 334 char maxOutstandingDiskReqs; /* # concurrent reqs to be sent to a 335 * disk. not used in kernel. */ 336 char debugVars[RF_MAXDBGV][50]; /* space for specifying debug 337 * variables & their values */ 338 unsigned int layoutSpecificSize; /* size in bytes of 339 * layout-specific info */ 340 void *layoutSpecific; /* a pointer to a layout-specific structure to 341 * be copied in */ 342 int force; /* if !0, ignore many fatal 343 configuration conditions */ 344 /* 345 "force" is used to override cases where the component labels would 346 indicate that configuration should not proceed without user 347 intervention 348 */ 349 }; 350 351 typedef RF_uint32 RF_ReconReqFlags_t; 352 /* flags that can be put in the rf_recon_req structure */ 353 #define RF_FDFLAGS_NONE 0x0 /* just fail the disk */ 354 #define RF_FDFLAGS_RECON 0x1 /* fail and initiate recon */ 355 356 struct rf_recon_req { /* used to tell the kernel to fail a disk */ 357 RF_RowCol_t row, col; 358 RF_ReconReqFlags_t flags; 359 void *raidPtr; /* used internally; need not be set at ioctl 360 * time */ 361 struct rf_recon_req *next; /* used internally; need not be set at 362 * ioctl time */ 363 }; 364 365 struct RF_SparetWait_s { 366 int C, G, fcol; /* C = # disks in row, G = # units in stripe, 367 * fcol = which disk has failed */ 368 369 RF_StripeCount_t SUsPerPU; /* this stuff is the info required to 370 * create a spare table */ 371 int TablesPerSpareRegion; 372 int BlocksPerTable; 373 RF_StripeCount_t TableDepthInPUs; 374 RF_StripeCount_t SpareSpaceDepthPerRegionInSUs; 375 376 RF_SparetWait_t *next; /* used internally; need not be set at ioctl 377 * time */ 378 }; 379 /* 380 * A physical disk can be in one of several states: 381 * IF YOU ADD A STATE, CHECK TO SEE IF YOU NEED TO MODIFY RF_DEAD_DISK(). 382 */ 383 enum RF_DiskStatus_e { 384 rf_ds_optimal, /* no problems */ 385 rf_ds_failed, /* reconstruction ongoing */ 386 rf_ds_reconstructing, /* reconstruction complete to spare, dead disk 387 * not yet replaced */ 388 rf_ds_dist_spared, /* reconstruction complete to distributed 389 * spare space, dead disk not yet replaced */ 390 rf_ds_spared, /* reconstruction complete to distributed 391 * spare space, dead disk not yet replaced */ 392 rf_ds_spare, /* an available spare disk */ 393 rf_ds_used_spare /* a spare which has been used, and hence is 394 * not available */ 395 }; 396 typedef enum RF_DiskStatus_e RF_DiskStatus_t; 397 398 struct RF_RaidDisk_s { 399 char devname[56]; /* name of device file */ 400 RF_DiskStatus_t status; /* whether it is up or down */ 401 RF_RowCol_t spareRow; /* if in status "spared", this identifies the 402 * spare disk */ 403 RF_RowCol_t spareCol; /* if in status "spared", this identifies the 404 * spare disk */ 405 RF_SectorCount_t numBlocks; /* number of blocks, obtained via READ 406 * CAPACITY */ 407 int blockSize; 408 RF_SectorCount_t partitionSize; /* The *actual* and *full* size of 409 the partition, from the disklabel */ 410 int auto_configured;/* 1 if this component was autoconfigured. 411 0 otherwise. */ 412 dev_t dev; 413 }; 414 /* The per-component label information that the user can set */ 415 typedef struct RF_ComponentInfo_s { 416 int row; /* the row number of this component */ 417 int column; /* the column number of this component */ 418 int serial_number; /* a user-specified serial number for this 419 RAID set */ 420 } RF_ComponentInfo_t; 421 422 /* The per-component label information */ 423 typedef struct RF_ComponentLabel_s { 424 int version; /* The version of this label. */ 425 int serial_number; /* a user-specified serial number for this 426 RAID set */ 427 int mod_counter; /* modification counter. Changed (usually 428 by incrementing) every time the label 429 is changed */ 430 int row; /* the row number of this component */ 431 int column; /* the column number of this component */ 432 int num_rows; /* number of rows in this RAID set */ 433 int num_columns; /* number of columns in this RAID set */ 434 int clean; /* 1 when clean, 0 when dirty */ 435 int status; /* rf_ds_optimal, rf_ds_dist_spared, whatever. */ 436 /* stuff that will be in version 2 of the label */ 437 int sectPerSU; /* Sectors per Stripe Unit */ 438 int SUsPerPU; /* Stripe Units per Parity Units */ 439 int SUsPerRU; /* Stripe Units per Reconstruction Units */ 440 int parityConfig; /* '0' == RAID0, '1' == RAID1, etc. */ 441 int maxOutstanding; /* maxOutstanding disk requests */ 442 int blockSize; /* size of component block. 443 (disklabel->d_secsize) */ 444 u_int numBlocks; /* number of blocks on this component. May 445 be smaller than the partition size. */ 446 u_int partitionSize; /* number of blocks on this *partition*. 447 Must exactly match the partition size 448 from the disklabel. */ 449 int future_use[33]; /* Future expansion */ 450 int autoconfigure; /* automatically configure this RAID set. 451 0 == no, 1 == yes */ 452 int root_partition; /* Use this set as / 453 0 == no, 1 == yes*/ 454 int last_unit; /* last unit number (e.g. 0 for /dev/raid0) 455 of this component. Used for autoconfigure 456 only. */ 457 int config_order; /* 0 .. n. The order in which the component 458 should be auto-configured. E.g. 0 is will 459 done first, (and would become raid0). 460 This may be in conflict with last_unit!!?! */ 461 /* Not currently used. */ 462 int future_use2[44]; /* More future expansion */ 463 } RF_ComponentLabel_t; 464 465 typedef struct RF_SingleComponent_s { 466 int row; 467 int column; 468 char component_name[50]; /* name of the component */ 469 } RF_SingleComponent_t; 470 471 typedef struct RF_DeviceConfig_s { 472 u_int rows; 473 u_int cols; 474 u_int maxqdepth; 475 int ndevs; 476 RF_RaidDisk_t devs[RF_MAX_DISKS]; 477 int nspares; 478 RF_RaidDisk_t spares[RF_MAX_DISKS]; 479 } RF_DeviceConfig_t; 480 481 typedef struct RF_ProgressInfo_s { 482 RF_uint64 remaining; 483 RF_uint64 completed; 484 RF_uint64 total; 485 } RF_ProgressInfo_t; 486 487 #ifndef _STANDALONE 488 typedef struct RF_LayoutSW_s { 489 RF_ParityConfig_t parityConfig; 490 const char *configName; 491 492 #ifndef _KERNEL 493 /* layout-specific parsing */ 494 int (*MakeLayoutSpecific) (FILE * fp, RF_Config_t * cfgPtr, 495 void *arg); 496 void *makeLayoutSpecificArg; 497 #else /* !KERNEL */ 498 499 /* initialization routine */ 500 int (*Configure) (RF_ShutdownList_t ** shutdownListp, 501 RF_Raid_t * raidPtr, RF_Config_t * cfgPtr); 502 503 /* routine to map RAID sector address -> physical (row, col, offset) */ 504 void (*MapSector) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 505 RF_RowCol_t * col, 506 RF_SectorNum_t * diskSector, int remap); 507 508 /* routine to map RAID sector address -> physical (r,c,o) of parity 509 * unit */ 510 void (*MapParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 511 RF_RowCol_t * col, 512 RF_SectorNum_t * diskSector, int remap); 513 514 /* routine to map RAID sector address -> physical (r,c,o) of Q unit */ 515 void (*MapQ) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 516 RF_RowCol_t * col, 517 RF_SectorNum_t * diskSector, int remap); 518 519 /* routine to identify the disks comprising a stripe */ 520 void (*IdentifyStripe) (RF_Raid_t * raidPtr, RF_RaidAddr_t addr, 521 RF_RowCol_t ** diskids); 522 523 /* routine to select a dag */ 524 void (*SelectionFunc) (RF_Raid_t * raidPtr, RF_IoType_t type, 525 RF_AccessStripeMap_t * asmap, 526 RF_VoidFuncPtr *); 527 528 /* map a stripe ID to a parity stripe ID. This is typically the 529 * identity mapping */ 530 void (*MapSIDToPSID) (RF_RaidLayout_t * layoutPtr, 531 RF_StripeNum_t stripeID, 532 RF_StripeNum_t * psID, 533 RF_ReconUnitNum_t * which_ru); 534 535 /* get default head separation limit (may be NULL) */ 536 RF_HeadSepLimit_t(*GetDefaultHeadSepLimit) (RF_Raid_t * raidPtr); 537 538 /* get default num recon buffers (may be NULL) */ 539 int (*GetDefaultNumFloatingReconBuffers) (RF_Raid_t * raidPtr); 540 541 /* get number of spare recon units (may be NULL) */ 542 RF_ReconUnitCount_t(*GetNumSpareRUs) (RF_Raid_t * raidPtr); 543 544 /* spare table installation (may be NULL) */ 545 int (*InstallSpareTable) (RF_Raid_t * raidPtr, RF_RowCol_t frow, 546 RF_RowCol_t fcol); 547 548 /* recon buffer submission function */ 549 int (*SubmitReconBuffer) (RF_ReconBuffer_t * rbuf, int keep_it, 550 int use_committed); 551 552 /* 553 * verify that parity information for a stripe is correct 554 * see rf_parityscan.h for return vals 555 */ 556 int (*VerifyParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidAddr, 557 RF_PhysDiskAddr_t * parityPDA, 558 int correct_it, RF_RaidAccessFlags_t flags); 559 560 /* number of faults tolerated by this mapping */ 561 int faultsTolerated; 562 563 /* states to step through in an access. Must end with "LastState". The 564 * default is DefaultStates in rf_layout.c */ 565 const RF_AccessState_t *states; 566 567 RF_AccessStripeMapFlags_t flags; 568 #endif /* !KERNEL */ 569 } RF_LayoutSW_t; 570 #endif 571 572 #endif /* !_RF_RAIDFRAMEVAR_H_ */ 573