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NetBSD/sys/dev/raidframe/raidframevar.h

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/* $NetBSD: raidframevar.h,v 1.12 2008/04/28 20:23:56 martin 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.
*
* 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_
#ifndef _STANDALONE
#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/simplelock.h>
#include <sys/mallocvar.h>
#endif
/*
* 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
/* Malloc types. */
#ifdef _KERNEL
MALLOC_DECLARE(M_RAIDFRAME);
#endif
/*
* 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_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_DecrAccessesCountState,
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) */
u_int numBlocks; /* number of blocks on this component. May
be smaller than the partition size. */
u_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;
#ifndef _STANDALONE
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 * 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 * 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 * 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);
/* 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 */
const RF_AccessState_t *states;
RF_AccessStripeMapFlags_t flags;
#endif /* !KERNEL */
} RF_LayoutSW_t;
#endif
#endif /* !_RF_RAIDFRAMEVAR_H_ */
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