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authoroster <oster@NetBSD.org>2001-10-04 15:43:57 +0000
committeroster <oster@NetBSD.org>2001-10-04 15:43:57 +0000
commit46a6eb147765f8e0eeba11bced36f97bcaf6daca (patch)
tree3a2402308c1d29dd35a72d7940ad867d1dd9db1c /sys/dev/raidframe/raidframevar.h
parent0eee1a5c648f403f0cdfe256ec358a3734a117ff (diff)
Step 1 of the disentangling of RAIDframe's .h files:
raidframevar.h - contains bits of rf_types.h, rf_layout.h, rf_netbsd.h, rf_raid.h, and rf_decluster.h. raidframeio.h - contains the bits needed for doing IOCTL's w/ RAIDframe. These bits will be visible to userland.
Diffstat (limited to 'sys/dev/raidframe/raidframevar.h')
-rw-r--r--sys/dev/raidframe/raidframevar.h570
1 files changed, 570 insertions, 0 deletions
diff --git a/sys/dev/raidframe/raidframevar.h b/sys/dev/raidframe/raidframevar.h
new file mode 100644
index 00000000000..ebd80a35463
--- /dev/null
+++ b/sys/dev/raidframe/raidframevar.h
@@ -0,0 +1,570 @@
+/* $NetBSD: raidframevar.h,v 1.1 2001/10/04 15:43:58 oster Exp $ */
+/*-
+ * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Greg Oster
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Mark Holland
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+/*
+ * Copyright (c) 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Jim Zelenka
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+/*****************************************************
+ *
+ * raidframevar.h
+ *
+ * main header file for using raidframe in the kernel.
+ *
+ *****************************************************/
+
+
+#ifndef _RF_RAIDFRAMEVAR_H_
+#define _RF_RAIDFRAMEVAR_H_
+
+
+#include <sys/ioctl.h>
+
+#include <sys/errno.h>
+#include <sys/types.h>
+
+#include <sys/uio.h>
+#include <sys/param.h>
+#include <sys/proc.h>
+#include <sys/lock.h>
+
+/*
+ * First, define system-dependent types and constants.
+ *
+ * If the machine is big-endian, RF_BIG_ENDIAN should be 1.
+ * Otherwise, it should be 0.
+ *
+ * The various integer types should be self-explanatory; we
+ * use these elsewhere to avoid size confusion.
+ *
+ * LONGSHIFT is lg(sizeof(long)) (that is, log base two of sizeof(long)
+ *
+ */
+
+#include <sys/types.h>
+#include <machine/endian.h>
+#include <machine/limits.h>
+
+#if BYTE_ORDER == BIG_ENDIAN
+#define RF_IS_BIG_ENDIAN 1
+#elif BYTE_ORDER == LITTLE_ENDIAN
+#define RF_IS_BIG_ENDIAN 0
+#else
+#error byte order not defined
+#endif
+typedef int8_t RF_int8;
+typedef u_int8_t RF_uint8;
+typedef int16_t RF_int16;
+typedef u_int16_t RF_uint16;
+typedef int32_t RF_int32;
+typedef u_int32_t RF_uint32;
+typedef int64_t RF_int64;
+typedef u_int64_t RF_uint64;
+#if LONG_BIT == 32
+#define RF_LONGSHIFT 2
+#elif LONG_BIT == 64
+#define RF_LONGSHIFT 3
+#else
+#error word size not defined
+#endif
+
+/*
+ * These are just zero and non-zero. We don't use "TRUE"
+ * and "FALSE" because there's too much nonsense trying
+ * to get them defined exactly once on every platform, given
+ * the different places they may be defined in system header
+ * files.
+ */
+#define RF_TRUE 1
+#define RF_FALSE 0
+
+/*
+ * Now, some generic types
+ */
+typedef RF_uint64 RF_IoCount_t;
+typedef RF_uint64 RF_Offset_t;
+typedef RF_uint32 RF_PSSFlags_t;
+typedef RF_uint64 RF_SectorCount_t;
+typedef RF_uint64 RF_StripeCount_t;
+typedef RF_int64 RF_SectorNum_t;/* these are unsigned so we can set them to
+ * (-1) for "uninitialized" */
+typedef RF_int64 RF_StripeNum_t;
+typedef RF_int64 RF_RaidAddr_t;
+typedef int RF_RowCol_t; /* unsigned so it can be (-1) */
+typedef RF_int64 RF_HeadSepLimit_t;
+typedef RF_int64 RF_ReconUnitCount_t;
+typedef int RF_ReconUnitNum_t;
+
+typedef char RF_ParityConfig_t;
+
+typedef char RF_DiskQueueType_t[1024];
+#define RF_DISK_QUEUE_TYPE_NONE ""
+
+/* values for the 'type' field in a reconstruction buffer */
+typedef int RF_RbufType_t;
+#define RF_RBUF_TYPE_EXCLUSIVE 0 /* this buf assigned exclusively to
+ * one disk */
+#define RF_RBUF_TYPE_FLOATING 1 /* this is a floating recon buf */
+#define RF_RBUF_TYPE_FORCED 2 /* this rbuf was allocated to complete
+ * a forced recon */
+
+typedef char RF_IoType_t;
+#define RF_IO_TYPE_READ 'r'
+#define RF_IO_TYPE_WRITE 'w'
+#define RF_IO_TYPE_NOP 'n'
+#define RF_IO_IS_R_OR_W(_type_) (((_type_) == RF_IO_TYPE_READ) \
+ || ((_type_) == RF_IO_TYPE_WRITE))
+
+typedef void (*RF_VoidFuncPtr) (void *,...);
+
+typedef RF_uint32 RF_AccessStripeMapFlags_t;
+typedef RF_uint32 RF_DiskQueueDataFlags_t;
+typedef RF_uint32 RF_DiskQueueFlags_t;
+typedef RF_uint32 RF_RaidAccessFlags_t;
+
+#define RF_DISKQUEUE_DATA_FLAGS_NONE ((RF_DiskQueueDataFlags_t)0)
+
+typedef struct RF_AccessStripeMap_s RF_AccessStripeMap_t;
+typedef struct RF_AccessStripeMapHeader_s RF_AccessStripeMapHeader_t;
+typedef struct RF_AllocListElem_s RF_AllocListElem_t;
+typedef struct RF_CallbackDesc_s RF_CallbackDesc_t;
+typedef struct RF_ChunkDesc_s RF_ChunkDesc_t;
+typedef struct RF_CommonLogData_s RF_CommonLogData_t;
+typedef struct RF_Config_s RF_Config_t;
+typedef struct RF_CumulativeStats_s RF_CumulativeStats_t;
+typedef struct RF_DagHeader_s RF_DagHeader_t;
+typedef struct RF_DagList_s RF_DagList_t;
+typedef struct RF_DagNode_s RF_DagNode_t;
+typedef struct RF_DeclusteredConfigInfo_s RF_DeclusteredConfigInfo_t;
+typedef struct RF_DiskId_s RF_DiskId_t;
+typedef struct RF_DiskMap_s RF_DiskMap_t;
+typedef struct RF_DiskQueue_s RF_DiskQueue_t;
+typedef struct RF_DiskQueueData_s RF_DiskQueueData_t;
+typedef struct RF_DiskQueueSW_s RF_DiskQueueSW_t;
+typedef struct RF_Etimer_s RF_Etimer_t;
+typedef struct RF_EventCreate_s RF_EventCreate_t;
+typedef struct RF_FreeList_s RF_FreeList_t;
+typedef struct RF_LockReqDesc_s RF_LockReqDesc_t;
+typedef struct RF_LockTableEntry_s RF_LockTableEntry_t;
+typedef struct RF_MCPair_s RF_MCPair_t;
+typedef struct RF_OwnerInfo_s RF_OwnerInfo_t;
+typedef struct RF_ParityLog_s RF_ParityLog_t;
+typedef struct RF_ParityLogAppendQueue_s RF_ParityLogAppendQueue_t;
+typedef struct RF_ParityLogData_s RF_ParityLogData_t;
+typedef struct RF_ParityLogDiskQueue_s RF_ParityLogDiskQueue_t;
+typedef struct RF_ParityLogQueue_s RF_ParityLogQueue_t;
+typedef struct RF_ParityLogRecord_s RF_ParityLogRecord_t;
+typedef struct RF_PerDiskReconCtrl_s RF_PerDiskReconCtrl_t;
+typedef struct RF_PSStatusHeader_s RF_PSStatusHeader_t;
+typedef struct RF_PhysDiskAddr_s RF_PhysDiskAddr_t;
+typedef struct RF_PropHeader_s RF_PropHeader_t;
+typedef struct RF_Raid_s RF_Raid_t;
+typedef struct RF_RaidAccessDesc_s RF_RaidAccessDesc_t;
+typedef struct RF_RaidDisk_s RF_RaidDisk_t;
+typedef struct RF_RaidLayout_s RF_RaidLayout_t;
+typedef struct RF_RaidReconDesc_s RF_RaidReconDesc_t;
+typedef struct RF_ReconBuffer_s RF_ReconBuffer_t;
+typedef struct RF_ReconConfig_s RF_ReconConfig_t;
+typedef struct RF_ReconCtrl_s RF_ReconCtrl_t;
+typedef struct RF_ReconDoneProc_s RF_ReconDoneProc_t;
+typedef struct RF_ReconEvent_s RF_ReconEvent_t;
+typedef struct RF_ReconMap_s RF_ReconMap_t;
+typedef struct RF_ReconMapListElem_s RF_ReconMapListElem_t;
+typedef struct RF_ReconParityStripeStatus_s RF_ReconParityStripeStatus_t;
+typedef struct RF_RedFuncs_s RF_RedFuncs_t;
+typedef struct RF_RegionBufferQueue_s RF_RegionBufferQueue_t;
+typedef struct RF_RegionInfo_s RF_RegionInfo_t;
+typedef struct RF_ShutdownList_s RF_ShutdownList_t;
+typedef struct RF_SpareTableEntry_s RF_SpareTableEntry_t;
+typedef struct RF_SparetWait_s RF_SparetWait_t;
+typedef struct RF_StripeLockDesc_s RF_StripeLockDesc_t;
+typedef struct RF_ThreadGroup_s RF_ThreadGroup_t;
+typedef struct RF_ThroughputStats_s RF_ThroughputStats_t;
+
+/*
+ * Important assumptions regarding ordering of the states in this list
+ * have been made!!! Before disturbing this ordering, look at code in
+ * sys/dev/raidframe/rf_states.c
+ */
+typedef enum RF_AccessState_e {
+ /* original states */
+ rf_QuiesceState, /* handles queisence for reconstruction */
+ rf_IncrAccessesCountState, /* count accesses in flight */
+ rf_DecrAccessesCountState,
+ rf_MapState, /* map access to disk addresses */
+ rf_LockState, /* take stripe locks */
+ rf_CreateDAGState, /* create DAGs */
+ rf_ExecuteDAGState, /* execute DAGs */
+ rf_ProcessDAGState, /* DAGs are completing- check if correct,
+ * or if we need to retry */
+ rf_CleanupState, /* release stripe locks, clean up */
+ rf_LastState /* must be the last state */
+} RF_AccessState_t;
+
+
+/* Some constants related to RAIDframe. These are arbitrary and
+ can be modified at will. */
+
+#define RF_MAXROW 10
+#define RF_MAXCOL 40
+#define RF_MAXSPARE 10
+#define RF_MAXDBGV 75 /* max number of debug variables */
+#define RF_MAX_DISKS 128 /* max disks per array */
+#define RF_SPAREMAP_NAME_LEN 128
+#define RF_PROTECTED_SECTORS 64L /* # of sectors at start of disk to
+ exclude from RAID address space */
+
+struct RF_SpareTableEntry_s {
+ u_int spareDisk; /* disk to which this block is spared */
+ u_int spareBlockOffsetInSUs; /* offset into spare table for that
+ * disk */
+};
+
+union RF_GenericParam_u {
+ void *p;
+ RF_uint64 v;
+};
+typedef union RF_GenericParam_u RF_DagParam_t;
+typedef union RF_GenericParam_u RF_CBParam_t;
+
+/* the raidframe configuration, passed down through an ioctl.
+ * the driver can be reconfigured (with total loss of data) at any time,
+ * but it must be shut down first.
+ */
+struct RF_Config_s {
+ RF_RowCol_t numRow, numCol, numSpare; /* number of rows, columns,
+ * and spare disks */
+ dev_t devs[RF_MAXROW][RF_MAXCOL]; /* device numbers for disks
+ * comprising array */
+ char devnames[RF_MAXROW][RF_MAXCOL][50]; /* device names */
+ dev_t spare_devs[RF_MAXSPARE]; /* device numbers for spare
+ * disks */
+ char spare_names[RF_MAXSPARE][50]; /* device names */
+ RF_SectorNum_t sectPerSU; /* sectors per stripe unit */
+ RF_StripeNum_t SUsPerPU;/* stripe units per parity unit */
+ RF_StripeNum_t SUsPerRU;/* stripe units per reconstruction unit */
+ RF_ParityConfig_t parityConfig; /* identifies the RAID architecture to
+ * be used */
+ RF_DiskQueueType_t diskQueueType; /* 'f' = fifo, 'c' = cvscan,
+ * not used in kernel */
+ char maxOutstandingDiskReqs; /* # concurrent reqs to be sent to a
+ * disk. not used in kernel. */
+ char debugVars[RF_MAXDBGV][50]; /* space for specifying debug
+ * variables & their values */
+ unsigned int layoutSpecificSize; /* size in bytes of
+ * layout-specific info */
+ void *layoutSpecific; /* a pointer to a layout-specific structure to
+ * be copied in */
+ int force; /* if !0, ignore many fatal
+ configuration conditions */
+ /*
+ "force" is used to override cases where the component labels would
+ indicate that configuration should not proceed without user
+ intervention
+ */
+};
+
+typedef RF_uint32 RF_ReconReqFlags_t;
+/* flags that can be put in the rf_recon_req structure */
+#define RF_FDFLAGS_NONE 0x0 /* just fail the disk */
+#define RF_FDFLAGS_RECON 0x1 /* fail and initiate recon */
+
+struct rf_recon_req { /* used to tell the kernel to fail a disk */
+ RF_RowCol_t row, col;
+ RF_ReconReqFlags_t flags;
+ void *raidPtr; /* used internally; need not be set at ioctl
+ * time */
+ struct rf_recon_req *next; /* used internally; need not be set at
+ * ioctl time */
+};
+
+struct RF_SparetWait_s {
+ int C, G, fcol; /* C = # disks in row, G = # units in stripe,
+ * fcol = which disk has failed */
+
+ RF_StripeCount_t SUsPerPU; /* this stuff is the info required to
+ * create a spare table */
+ int TablesPerSpareRegion;
+ int BlocksPerTable;
+ RF_StripeCount_t TableDepthInPUs;
+ RF_StripeCount_t SpareSpaceDepthPerRegionInSUs;
+
+ RF_SparetWait_t *next; /* used internally; need not be set at ioctl
+ * time */
+};
+/*
+ * A physical disk can be in one of several states:
+ * IF YOU ADD A STATE, CHECK TO SEE IF YOU NEED TO MODIFY RF_DEAD_DISK().
+ */
+enum RF_DiskStatus_e {
+ rf_ds_optimal, /* no problems */
+ rf_ds_failed, /* reconstruction ongoing */
+ rf_ds_reconstructing, /* reconstruction complete to spare, dead disk
+ * not yet replaced */
+ rf_ds_dist_spared, /* reconstruction complete to distributed
+ * spare space, dead disk not yet replaced */
+ rf_ds_spared, /* reconstruction complete to distributed
+ * spare space, dead disk not yet replaced */
+ rf_ds_spare, /* an available spare disk */
+ rf_ds_used_spare /* a spare which has been used, and hence is
+ * not available */
+};
+typedef enum RF_DiskStatus_e RF_DiskStatus_t;
+
+struct RF_RaidDisk_s {
+ char devname[56]; /* name of device file */
+ RF_DiskStatus_t status; /* whether it is up or down */
+ RF_RowCol_t spareRow; /* if in status "spared", this identifies the
+ * spare disk */
+ RF_RowCol_t spareCol; /* if in status "spared", this identifies the
+ * spare disk */
+ RF_SectorCount_t numBlocks; /* number of blocks, obtained via READ
+ * CAPACITY */
+ int blockSize;
+ RF_SectorCount_t partitionSize; /* The *actual* and *full* size of
+ the partition, from the disklabel */
+ int auto_configured;/* 1 if this component was autoconfigured.
+ 0 otherwise. */
+ dev_t dev;
+};
+/* The per-component label information that the user can set */
+typedef struct RF_ComponentInfo_s {
+ int row; /* the row number of this component */
+ int column; /* the column number of this component */
+ int serial_number; /* a user-specified serial number for this
+ RAID set */
+} RF_ComponentInfo_t;
+
+/* The per-component label information */
+typedef struct RF_ComponentLabel_s {
+ int version; /* The version of this label. */
+ int serial_number; /* a user-specified serial number for this
+ RAID set */
+ int mod_counter; /* modification counter. Changed (usually
+ by incrementing) every time the label
+ is changed */
+ int row; /* the row number of this component */
+ int column; /* the column number of this component */
+ int num_rows; /* number of rows in this RAID set */
+ int num_columns; /* number of columns in this RAID set */
+ int clean; /* 1 when clean, 0 when dirty */
+ int status; /* rf_ds_optimal, rf_ds_dist_spared, whatever. */
+ /* stuff that will be in version 2 of the label */
+ int sectPerSU; /* Sectors per Stripe Unit */
+ int SUsPerPU; /* Stripe Units per Parity Units */
+ int SUsPerRU; /* Stripe Units per Reconstruction Units */
+ int parityConfig; /* '0' == RAID0, '1' == RAID1, etc. */
+ int maxOutstanding; /* maxOutstanding disk requests */
+ int blockSize; /* size of component block.
+ (disklabel->d_secsize) */
+ int numBlocks; /* number of blocks on this component. May
+ be smaller than the partition size. */
+ int partitionSize; /* number of blocks on this *partition*.
+ Must exactly match the partition size
+ from the disklabel. */
+ int future_use[33]; /* Future expansion */
+ int autoconfigure; /* automatically configure this RAID set.
+ 0 == no, 1 == yes */
+ int root_partition; /* Use this set as /
+ 0 == no, 1 == yes*/
+ int last_unit; /* last unit number (e.g. 0 for /dev/raid0)
+ of this component. Used for autoconfigure
+ only. */
+ int config_order; /* 0 .. n. The order in which the component
+ should be auto-configured. E.g. 0 is will
+ done first, (and would become raid0).
+ This may be in conflict with last_unit!!?! */
+ /* Not currently used. */
+ int future_use2[44]; /* More future expansion */
+} RF_ComponentLabel_t;
+
+typedef struct RF_SingleComponent_s {
+ int row;
+ int column;
+ char component_name[50]; /* name of the component */
+} RF_SingleComponent_t;
+
+typedef struct RF_DeviceConfig_s {
+ u_int rows;
+ u_int cols;
+ u_int maxqdepth;
+ int ndevs;
+ RF_RaidDisk_t devs[RF_MAX_DISKS];
+ int nspares;
+ RF_RaidDisk_t spares[RF_MAX_DISKS];
+} RF_DeviceConfig_t;
+
+typedef struct RF_ProgressInfo_s {
+ RF_uint64 remaining;
+ RF_uint64 completed;
+ RF_uint64 total;
+} RF_ProgressInfo_t;
+
+typedef struct RF_LayoutSW_s {
+ RF_ParityConfig_t parityConfig;
+ const char *configName;
+
+#ifndef _KERNEL
+ /* layout-specific parsing */
+ int (*MakeLayoutSpecific) (FILE * fp, RF_Config_t * cfgPtr,
+ void *arg);
+ void *makeLayoutSpecificArg;
+#else /* !KERNEL */
+
+ /* initialization routine */
+ int (*Configure) (RF_ShutdownList_t ** shutdownListp,
+ RF_Raid_t * raidPtr, RF_Config_t * cfgPtr);
+
+ /* routine to map RAID sector address -> physical (row, col, offset) */
+ void (*MapSector) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector,
+ RF_RowCol_t * row, RF_RowCol_t * col,
+ RF_SectorNum_t * diskSector, int remap);
+
+ /* routine to map RAID sector address -> physical (r,c,o) of parity
+ * unit */
+ void (*MapParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector,
+ RF_RowCol_t * row, RF_RowCol_t * col,
+ RF_SectorNum_t * diskSector, int remap);
+
+ /* routine to map RAID sector address -> physical (r,c,o) of Q unit */
+ void (*MapQ) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector,
+ RF_RowCol_t * row, RF_RowCol_t * col,
+ RF_SectorNum_t * diskSector, int remap);
+
+ /* routine to identify the disks comprising a stripe */
+ void (*IdentifyStripe) (RF_Raid_t * raidPtr, RF_RaidAddr_t addr,
+ RF_RowCol_t ** diskids,
+ RF_RowCol_t * outRow);
+
+ /* routine to select a dag */
+ void (*SelectionFunc) (RF_Raid_t * raidPtr, RF_IoType_t type,
+ RF_AccessStripeMap_t * asmap,
+ RF_VoidFuncPtr *);
+
+ /* map a stripe ID to a parity stripe ID. This is typically the
+ * identity mapping */
+ void (*MapSIDToPSID) (RF_RaidLayout_t * layoutPtr,
+ RF_StripeNum_t stripeID,
+ RF_StripeNum_t * psID,
+ RF_ReconUnitNum_t * which_ru);
+
+ /* get default head separation limit (may be NULL) */
+ RF_HeadSepLimit_t(*GetDefaultHeadSepLimit) (RF_Raid_t * raidPtr);
+
+ /* get default num recon buffers (may be NULL) */
+ int (*GetDefaultNumFloatingReconBuffers) (RF_Raid_t * raidPtr);
+
+ /* get number of spare recon units (may be NULL) */
+ RF_ReconUnitCount_t(*GetNumSpareRUs) (RF_Raid_t * raidPtr);
+
+ /* spare table installation (may be NULL) */
+ int (*InstallSpareTable) (RF_Raid_t * raidPtr, RF_RowCol_t frow,
+ RF_RowCol_t fcol);
+
+ /* recon buffer submission function */
+ int (*SubmitReconBuffer) (RF_ReconBuffer_t * rbuf, int keep_it,
+ int use_committed);
+
+ /*
+ * verify that parity information for a stripe is correct
+ * see rf_parityscan.h for return vals
+ */
+ int (*VerifyParity) (RF_Raid_t * raidPtr, RF_RaidAddr_t raidAddr,
+ RF_PhysDiskAddr_t * parityPDA,
+ int correct_it, RF_RaidAccessFlags_t flags);
+
+ /* number of faults tolerated by this mapping */
+ int faultsTolerated;
+
+ /* states to step through in an access. Must end with "LastState". The
+ * default is DefaultStates in rf_layout.c */
+ RF_AccessState_t *states;
+
+ RF_AccessStripeMapFlags_t flags;
+#endif /* !KERNEL */
+} RF_LayoutSW_t;
+
+#endif /* !_RF_RAIDFRAMEVAR_H_ */