1 /* $NetBSD: raidframevar.h,v 1.3 2003/02/01 18:34:14 tron 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_ 102 103 104 #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> 115 116 /* 117 * First, define system-dependent types and constants. 118 * 119 * If the machine is big-endian, RF_BIG_ENDIAN should be 1. 120 * Otherwise, it should be 0. 121 * 122 * The various integer types should be self-explanatory; we 123 * use these elsewhere to avoid size confusion. 124 * 125 * LONGSHIFT is lg(sizeof(long)) (that is, log base two of sizeof(long) 126 * 127 */ 128 129 #include <sys/types.h> 130 #include <machine/endian.h> 131 #include <machine/limits.h> 132 133 #if BYTE_ORDER == BIG_ENDIAN 134 #define RF_IS_BIG_ENDIAN 1 135 #elif BYTE_ORDER == LITTLE_ENDIAN 136 #define RF_IS_BIG_ENDIAN 0 137 #else 138 #error byte order not defined 139 #endif 140 typedef int8_t RF_int8; 141 typedef u_int8_t RF_uint8; 142 typedef int16_t RF_int16; 143 typedef u_int16_t RF_uint16; 144 typedef int32_t RF_int32; 145 typedef u_int32_t RF_uint32; 146 typedef int64_t RF_int64; 147 typedef u_int64_t RF_uint64; 148 #if LONG_BIT == 32 149 #define RF_LONGSHIFT 2 150 #elif LONG_BIT == 64 151 #define RF_LONGSHIFT 3 152 #else 153 #error word size not defined 154 #endif 155 156 /* 157 * These are just zero and non-zero. We don't use "TRUE" 158 * and "FALSE" because there's too much nonsense trying 159 * to get them defined exactly once on every platform, given 160 * the different places they may be defined in system header 161 * files. 162 */ 163 #define RF_TRUE 1 164 #define RF_FALSE 0 165 166 /* Malloc types. */ 167 #ifdef _KERNEL 168 MALLOC_DECLARE(M_RAIDFRAME); 169 #endif 170 171 /* 172 * Now, some generic types 173 */ 174 typedef RF_uint64 RF_IoCount_t; 175 typedef RF_uint64 RF_Offset_t; 176 typedef RF_uint32 RF_PSSFlags_t; 177 typedef RF_uint64 RF_SectorCount_t; 178 typedef RF_uint64 RF_StripeCount_t; 179 typedef RF_int64 RF_SectorNum_t;/* these are unsigned so we can set them to 180 * (-1) for "uninitialized" */ 181 typedef RF_int64 RF_StripeNum_t; 182 typedef RF_int64 RF_RaidAddr_t; 183 typedef int RF_RowCol_t; /* unsigned so it can be (-1) */ 184 typedef RF_int64 RF_HeadSepLimit_t; 185 typedef RF_int64 RF_ReconUnitCount_t; 186 typedef int RF_ReconUnitNum_t; 187 188 typedef char RF_ParityConfig_t; 189 190 typedef char RF_DiskQueueType_t[1024]; 191 #define RF_DISK_QUEUE_TYPE_NONE "" 192 193 /* values for the 'type' field in a reconstruction buffer */ 194 typedef int RF_RbufType_t; 195 #define RF_RBUF_TYPE_EXCLUSIVE 0 /* this buf assigned exclusively to 196 * one disk */ 197 #define RF_RBUF_TYPE_FLOATING 1 /* this is a floating recon buf */ 198 #define RF_RBUF_TYPE_FORCED 2 /* this rbuf was allocated to complete 199 * a forced recon */ 200 201 typedef char RF_IoType_t; 202 #define RF_IO_TYPE_READ 'r' 203 #define RF_IO_TYPE_WRITE 'w' 204 #define RF_IO_TYPE_NOP 'n' 205 #define RF_IO_IS_R_OR_W(_type_) (((_type_) == RF_IO_TYPE_READ) \ 206 || ((_type_) == RF_IO_TYPE_WRITE)) 207 208 typedef void (*RF_VoidFuncPtr) (void *,...); 209 210 typedef RF_uint32 RF_AccessStripeMapFlags_t; 211 typedef RF_uint32 RF_DiskQueueDataFlags_t; 212 typedef RF_uint32 RF_DiskQueueFlags_t; 213 typedef RF_uint32 RF_RaidAccessFlags_t; 214 215 #define RF_DISKQUEUE_DATA_FLAGS_NONE ((RF_DiskQueueDataFlags_t)0) 216 217 typedef struct RF_AccessStripeMap_s RF_AccessStripeMap_t; 218 typedef struct RF_AccessStripeMapHeader_s RF_AccessStripeMapHeader_t; 219 typedef struct RF_AllocListElem_s RF_AllocListElem_t; 220 typedef struct RF_CallbackDesc_s RF_CallbackDesc_t; 221 typedef struct RF_ChunkDesc_s RF_ChunkDesc_t; 222 typedef struct RF_CommonLogData_s RF_CommonLogData_t; 223 typedef struct RF_Config_s RF_Config_t; 224 typedef struct RF_CumulativeStats_s RF_CumulativeStats_t; 225 typedef struct RF_DagHeader_s RF_DagHeader_t; 226 typedef struct RF_DagList_s RF_DagList_t; 227 typedef struct RF_DagNode_s RF_DagNode_t; 228 typedef struct RF_DeclusteredConfigInfo_s RF_DeclusteredConfigInfo_t; 229 typedef struct RF_DiskId_s RF_DiskId_t; 230 typedef struct RF_DiskMap_s RF_DiskMap_t; 231 typedef struct RF_DiskQueue_s RF_DiskQueue_t; 232 typedef struct RF_DiskQueueData_s RF_DiskQueueData_t; 233 typedef struct RF_DiskQueueSW_s RF_DiskQueueSW_t; 234 typedef struct RF_Etimer_s RF_Etimer_t; 235 typedef struct RF_EventCreate_s RF_EventCreate_t; 236 typedef struct RF_FreeList_s RF_FreeList_t; 237 typedef struct RF_LockReqDesc_s RF_LockReqDesc_t; 238 typedef struct RF_LockTableEntry_s RF_LockTableEntry_t; 239 typedef struct RF_MCPair_s RF_MCPair_t; 240 typedef struct RF_OwnerInfo_s RF_OwnerInfo_t; 241 typedef struct RF_ParityLog_s RF_ParityLog_t; 242 typedef struct RF_ParityLogAppendQueue_s RF_ParityLogAppendQueue_t; 243 typedef struct RF_ParityLogData_s RF_ParityLogData_t; 244 typedef struct RF_ParityLogDiskQueue_s RF_ParityLogDiskQueue_t; 245 typedef struct RF_ParityLogQueue_s RF_ParityLogQueue_t; 246 typedef struct RF_ParityLogRecord_s RF_ParityLogRecord_t; 247 typedef struct RF_PerDiskReconCtrl_s RF_PerDiskReconCtrl_t; 248 typedef struct RF_PSStatusHeader_s RF_PSStatusHeader_t; 249 typedef struct RF_PhysDiskAddr_s RF_PhysDiskAddr_t; 250 typedef struct RF_PropHeader_s RF_PropHeader_t; 251 typedef struct RF_Raid_s RF_Raid_t; 252 typedef struct RF_RaidAccessDesc_s RF_RaidAccessDesc_t; 253 typedef struct RF_RaidDisk_s RF_RaidDisk_t; 254 typedef struct RF_RaidLayout_s RF_RaidLayout_t; 255 typedef struct RF_RaidReconDesc_s RF_RaidReconDesc_t; 256 typedef struct RF_ReconBuffer_s RF_ReconBuffer_t; 257 typedef struct RF_ReconConfig_s RF_ReconConfig_t; 258 typedef struct RF_ReconCtrl_s RF_ReconCtrl_t; 259 typedef struct RF_ReconDoneProc_s RF_ReconDoneProc_t; 260 typedef struct RF_ReconEvent_s RF_ReconEvent_t; 261 typedef struct RF_ReconMap_s RF_ReconMap_t; 262 typedef struct RF_ReconMapListElem_s RF_ReconMapListElem_t; 263 typedef struct RF_ReconParityStripeStatus_s RF_ReconParityStripeStatus_t; 264 typedef struct RF_RedFuncs_s RF_RedFuncs_t; 265 typedef struct RF_RegionBufferQueue_s RF_RegionBufferQueue_t; 266 typedef struct RF_RegionInfo_s RF_RegionInfo_t; 267 typedef struct RF_ShutdownList_s RF_ShutdownList_t; 268 typedef struct RF_SpareTableEntry_s RF_SpareTableEntry_t; 269 typedef struct RF_SparetWait_s RF_SparetWait_t; 270 typedef struct RF_StripeLockDesc_s RF_StripeLockDesc_t; 271 typedef struct RF_ThreadGroup_s RF_ThreadGroup_t; 272 typedef struct RF_ThroughputStats_s RF_ThroughputStats_t; 273 274 /* 275 * Important assumptions regarding ordering of the states in this list 276 * have been made!!! Before disturbing this ordering, look at code in 277 * sys/dev/raidframe/rf_states.c 278 */ 279 typedef enum RF_AccessState_e { 280 /* original states */ 281 rf_QuiesceState, /* handles queisence for reconstruction */ 282 rf_IncrAccessesCountState, /* count accesses in flight */ 283 rf_DecrAccessesCountState, 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_LastState /* must be the last state */ 292 } RF_AccessState_t; 293 294 295 /* Some constants related to RAIDframe. These are arbitrary and 296 can be modified at will. */ 297 298 #define RF_MAXROW 10 299 #define RF_MAXCOL 40 300 #define RF_MAXSPARE 10 301 #define RF_MAXDBGV 75 /* max number of debug variables */ 302 #define RF_MAX_DISKS 128 /* max disks per array */ 303 #define RF_SPAREMAP_NAME_LEN 128 304 #define RF_PROTECTED_SECTORS 64L /* # of sectors at start of disk to 305 exclude from RAID address space */ 306 307 struct RF_SpareTableEntry_s { 308 u_int spareDisk; /* disk to which this block is spared */ 309 u_int spareBlockOffsetInSUs; /* offset into spare table for that 310 * disk */ 311 }; 312 313 union RF_GenericParam_u { 314 void *p; 315 RF_uint64 v; 316 }; 317 typedef union RF_GenericParam_u RF_DagParam_t; 318 typedef union RF_GenericParam_u RF_CBParam_t; 319 320 /* the raidframe configuration, passed down through an ioctl. 321 * the driver can be reconfigured (with total loss of data) at any time, 322 * but it must be shut down first. 323 */ 324 struct RF_Config_s { 325 RF_RowCol_t numRow, numCol, numSpare; /* number of rows, columns, 326 * and spare disks */ 327 dev_t devs[RF_MAXROW][RF_MAXCOL]; /* device numbers for disks 328 * comprising array */ 329 char devnames[RF_MAXROW][RF_MAXCOL][50]; /* device names */ 330 dev_t spare_devs[RF_MAXSPARE]; /* device numbers for spare 331 * disks */ 332 char spare_names[RF_MAXSPARE][50]; /* device names */ 333 RF_SectorNum_t sectPerSU; /* sectors per stripe unit */ 334 RF_StripeNum_t SUsPerPU;/* stripe units per parity unit */ 335 RF_StripeNum_t SUsPerRU;/* stripe units per reconstruction unit */ 336 RF_ParityConfig_t parityConfig; /* identifies the RAID architecture to 337 * be used */ 338 RF_DiskQueueType_t diskQueueType; /* 'f' = fifo, 'c' = cvscan, 339 * not used in kernel */ 340 char maxOutstandingDiskReqs; /* # concurrent reqs to be sent to a 341 * disk. not used in kernel. */ 342 char debugVars[RF_MAXDBGV][50]; /* space for specifying debug 343 * variables & their values */ 344 unsigned int layoutSpecificSize; /* size in bytes of 345 * layout-specific info */ 346 void *layoutSpecific; /* a pointer to a layout-specific structure to 347 * be copied in */ 348 int force; /* if !0, ignore many fatal 349 configuration conditions */ 350 /* 351 "force" is used to override cases where the component labels would 352 indicate that configuration should not proceed without user 353 intervention 354 */ 355 }; 356 357 typedef RF_uint32 RF_ReconReqFlags_t; 358 /* flags that can be put in the rf_recon_req structure */ 359 #define RF_FDFLAGS_NONE 0x0 /* just fail the disk */ 360 #define RF_FDFLAGS_RECON 0x1 /* fail and initiate recon */ 361 362 struct rf_recon_req { /* used to tell the kernel to fail a disk */ 363 RF_RowCol_t row, col; 364 RF_ReconReqFlags_t flags; 365 void *raidPtr; /* used internally; need not be set at ioctl 366 * time */ 367 struct rf_recon_req *next; /* used internally; need not be set at 368 * ioctl time */ 369 }; 370 371 struct RF_SparetWait_s { 372 int C, G, fcol; /* C = # disks in row, G = # units in stripe, 373 * fcol = which disk has failed */ 374 375 RF_StripeCount_t SUsPerPU; /* this stuff is the info required to 376 * create a spare table */ 377 int TablesPerSpareRegion; 378 int BlocksPerTable; 379 RF_StripeCount_t TableDepthInPUs; 380 RF_StripeCount_t SpareSpaceDepthPerRegionInSUs; 381 382 RF_SparetWait_t *next; /* used internally; need not be set at ioctl 383 * time */ 384 }; 385 /* 386 * A physical disk can be in one of several states: 387 * IF YOU ADD A STATE, CHECK TO SEE IF YOU NEED TO MODIFY RF_DEAD_DISK(). 388 */ 389 enum RF_DiskStatus_e { 390 rf_ds_optimal, /* no problems */ 391 rf_ds_failed, /* reconstruction ongoing */ 392 rf_ds_reconstructing, /* reconstruction complete to spare, dead disk 393 * not yet replaced */ 394 rf_ds_dist_spared, /* reconstruction complete to distributed 395 * spare space, dead disk not yet replaced */ 396 rf_ds_spared, /* reconstruction complete to distributed 397 * spare space, dead disk not yet replaced */ 398 rf_ds_spare, /* an available spare disk */ 399 rf_ds_used_spare /* a spare which has been used, and hence is 400 * not available */ 401 }; 402 typedef enum RF_DiskStatus_e RF_DiskStatus_t; 403 404 struct RF_RaidDisk_s { 405 char devname[56]; /* name of device file */ 406 RF_DiskStatus_t status; /* whether it is up or down */ 407 RF_RowCol_t spareRow; /* if in status "spared", this identifies the 408 * spare disk */ 409 RF_RowCol_t spareCol; /* if in status "spared", this identifies the 410 * spare disk */ 411 RF_SectorCount_t numBlocks; /* number of blocks, obtained via READ 412 * CAPACITY */ 413 int blockSize; 414 RF_SectorCount_t partitionSize; /* The *actual* and *full* size of 415 the partition, from the disklabel */ 416 int auto_configured;/* 1 if this component was autoconfigured. 417 0 otherwise. */ 418 dev_t dev; 419 }; 420 /* The per-component label information that the user can set */ 421 typedef struct RF_ComponentInfo_s { 422 int row; /* the row number of this component */ 423 int column; /* the column number of this component */ 424 int serial_number; /* a user-specified serial number for this 425 RAID set */ 426 } RF_ComponentInfo_t; 427 428 /* The per-component label information */ 429 typedef struct RF_ComponentLabel_s { 430 int version; /* The version of this label. */ 431 int serial_number; /* a user-specified serial number for this 432 RAID set */ 433 int mod_counter; /* modification counter. Changed (usually 434 by incrementing) every time the label 435 is changed */ 436 int row; /* the row number of this component */ 437 int column; /* the column number of this component */ 438 int num_rows; /* number of rows in this RAID set */ 439 int num_columns; /* number of columns in this RAID set */ 440 int clean; /* 1 when clean, 0 when dirty */ 441 int status; /* rf_ds_optimal, rf_ds_dist_spared, whatever. */ 442 /* stuff that will be in version 2 of the label */ 443 int sectPerSU; /* Sectors per Stripe Unit */ 444 int SUsPerPU; /* Stripe Units per Parity Units */ 445 int SUsPerRU; /* Stripe Units per Reconstruction Units */ 446 int parityConfig; /* '0' == RAID0, '1' == RAID1, etc. */ 447 int maxOutstanding; /* maxOutstanding disk requests */ 448 int blockSize; /* size of component block. 449 (disklabel->d_secsize) */ 450 int numBlocks; /* number of blocks on this component. May 451 be smaller than the partition size. */ 452 int partitionSize; /* number of blocks on this *partition*. 453 Must exactly match the partition size 454 from the disklabel. */ 455 int future_use[33]; /* Future expansion */ 456 int autoconfigure; /* automatically configure this RAID set. 457 0 == no, 1 == yes */ 458 int root_partition; /* Use this set as / 459 0 == no, 1 == yes*/ 460 int last_unit; /* last unit number (e.g. 0 for /dev/raid0) 461 of this component. Used for autoconfigure 462 only. */ 463 int config_order; /* 0 .. n. The order in which the component 464 should be auto-configured. E.g. 0 is will 465 done first, (and would become raid0). 466 This may be in conflict with last_unit!!?! */ 467 /* Not currently used. */ 468 int future_use2[44]; /* More future expansion */ 469 } RF_ComponentLabel_t; 470 471 typedef struct RF_SingleComponent_s { 472 int row; 473 int column; 474 char component_name[50]; /* name of the component */ 475 } RF_SingleComponent_t; 476 477 typedef struct RF_DeviceConfig_s { 478 u_int rows; 479 u_int cols; 480 u_int maxqdepth; 481 int ndevs; 482 RF_RaidDisk_t devs[RF_MAX_DISKS]; 483 int nspares; 484 RF_RaidDisk_t spares[RF_MAX_DISKS]; 485 } RF_DeviceConfig_t; 486 487 typedef struct RF_ProgressInfo_s { 488 RF_uint64 remaining; 489 RF_uint64 completed; 490 RF_uint64 total; 491 } RF_ProgressInfo_t; 492 493 typedef struct RF_LayoutSW_s { 494 RF_ParityConfig_t parityConfig; 495 const char *configName; 496 497 #ifndef _KERNEL 498 /* layout-specific parsing */ 499 int (*MakeLayoutSpecific) (FILE * fp, RF_Config_t * cfgPtr, 500 void *arg); 501 void *makeLayoutSpecificArg; 502 #else /* !KERNEL */ 503 504 /* initialization routine */ 505 int (*Configure) (RF_ShutdownList_t ** shutdownListp, 506 RF_Raid_t * raidPtr, RF_Config_t * cfgPtr); 507 508 /* routine to map RAID sector address -> physical (row, col, offset) */ 509 void (*MapSector) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 510 RF_RowCol_t * row, RF_RowCol_t * col, 511 RF_SectorNum_t * diskSector, int remap); 512 513 /* routine to map RAID sector address -> physical (r,c,o) of parity 514 * unit */ 515 void (*MapParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 516 RF_RowCol_t * row, RF_RowCol_t * col, 517 RF_SectorNum_t * diskSector, int remap); 518 519 /* routine to map RAID sector address -> physical (r,c,o) of Q unit */ 520 void (*MapQ) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector, 521 RF_RowCol_t * row, RF_RowCol_t * col, 522 RF_SectorNum_t * diskSector, int remap); 523 524 /* routine to identify the disks comprising a stripe */ 525 void (*IdentifyStripe) (RF_Raid_t * raidPtr, RF_RaidAddr_t addr, 526 RF_RowCol_t ** diskids, 527 RF_RowCol_t * outRow); 528 529 /* routine to select a dag */ 530 void (*SelectionFunc) (RF_Raid_t * raidPtr, RF_IoType_t type, 531 RF_AccessStripeMap_t * asmap, 532 RF_VoidFuncPtr *); 533 534 /* map a stripe ID to a parity stripe ID. This is typically the 535 * identity mapping */ 536 void (*MapSIDToPSID) (RF_RaidLayout_t * layoutPtr, 537 RF_StripeNum_t stripeID, 538 RF_StripeNum_t * psID, 539 RF_ReconUnitNum_t * which_ru); 540 541 /* get default head separation limit (may be NULL) */ 542 RF_HeadSepLimit_t(*GetDefaultHeadSepLimit) (RF_Raid_t * raidPtr); 543 544 /* get default num recon buffers (may be NULL) */ 545 int (*GetDefaultNumFloatingReconBuffers) (RF_Raid_t * raidPtr); 546 547 /* get number of spare recon units (may be NULL) */ 548 RF_ReconUnitCount_t(*GetNumSpareRUs) (RF_Raid_t * raidPtr); 549 550 /* spare table installation (may be NULL) */ 551 int (*InstallSpareTable) (RF_Raid_t * raidPtr, RF_RowCol_t frow, 552 RF_RowCol_t fcol); 553 554 /* recon buffer submission function */ 555 int (*SubmitReconBuffer) (RF_ReconBuffer_t * rbuf, int keep_it, 556 int use_committed); 557 558 /* 559 * verify that parity information for a stripe is correct 560 * see rf_parityscan.h for return vals 561 */ 562 int (*VerifyParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidAddr, 563 RF_PhysDiskAddr_t * parityPDA, 564 int correct_it, RF_RaidAccessFlags_t flags); 565 566 /* number of faults tolerated by this mapping */ 567 int faultsTolerated; 568 569 /* states to step through in an access. Must end with "LastState". The 570 * default is DefaultStates in rf_layout.c */ 571 RF_AccessState_t *states; 572 573 RF_AccessStripeMapFlags_t flags; 574 #endif /* !KERNEL */ 575 } RF_LayoutSW_t; 576 577 #endif /* !_RF_RAIDFRAMEVAR_H_ */ 578