Annotation of sys/dev/raidframe/rf_decluster.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: rf_decluster.h,v 1.3 2002/12/16 07:01:03 tdeval Exp $ */
! 2: /* $NetBSD: rf_decluster.h,v 1.3 1999/02/05 00:06:09 oster Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 Carnegie-Mellon University.
! 6: * All rights reserved.
! 7: *
! 8: * Author: Mark Holland
! 9: *
! 10: * Permission to use, copy, modify and distribute this software and
! 11: * its documentation is hereby granted, provided that both the copyright
! 12: * notice and this permission notice appear in all copies of the
! 13: * software, derivative works or modified versions, and any portions
! 14: * thereof, and that both notices appear in supporting documentation.
! 15: *
! 16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 19: *
! 20: * Carnegie Mellon requests users of this software to return to
! 21: *
! 22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 23: * School of Computer Science
! 24: * Carnegie Mellon University
! 25: * Pittsburgh PA 15213-3890
! 26: *
! 27: * any improvements or extensions that they make and grant Carnegie the
! 28: * rights to redistribute these changes.
! 29: */
! 30:
! 31: /*****************************************************************************
! 32: *
! 33: * decluster.h -- Header file for declustered layout code.
! 34: *
! 35: * Adapted from raidSim version July 1994
! 36: * Created 10-21-92 (MCH)
! 37: *
! 38: *****************************************************************************/
! 39:
! 40: #ifndef _RF__RF_DECLUSTER_H_
! 41: #define _RF__RF_DECLUSTER_H_
! 42:
! 43: #include "rf_types.h"
! 44:
! 45: /*
! 46: * These structures define the tables used to locate the spare unit
! 47: * associated with a particular data or parity unit, and to perform
! 48: * the associated inverse mapping.
! 49: */
! 50: struct RF_SpareTableEntry_s {
! 51: u_int spareDisk; /* Disk where this block is spared. */
! 52: u_int spareBlockOffsetInSUs; /*
! 53: * Offset into spare table for that
! 54: * disk.
! 55: */
! 56: };
! 57:
! 58: #define RF_SPAREMAP_NAME_LEN 128
! 59:
! 60: /*
! 61: * This is the layout-specific info structure for the declustered layout.
! 62: */
! 63: struct RF_DeclusteredConfigInfo_s {
! 64: /* Number of stripe units per parity stripe. */
! 65: RF_StripeCount_t groupSize;
! 66: /* The block design table. */
! 67: RF_RowCol_t **LayoutTable;
! 68: RF_RowCol_t **OffsetTable;
! 69: /* The sector offset table. */
! 70: RF_RowCol_t **BlockTable;
! 71: /* The block membership table. */
! 72: RF_StripeCount_t SUsPerFullTable;
! 73: /* Stripe units per full table. */
! 74: RF_StripeCount_t SUsPerTable;
! 75: /* Stripe units per table. */
! 76: RF_StripeCount_t PUsPerBlock;
! 77: /* Parity units per block. */
! 78: RF_StripeCount_t SUsPerBlock;
! 79: /* Stripe units per block. */
! 80: RF_StripeCount_t BlocksPerTable;
! 81: /* Block design tuples per table. */
! 82: RF_StripeCount_t NumParityReps;
! 83: /* Tables per full table. */
! 84: RF_StripeCount_t TableDepthInPUs;
! 85: /* PUs on one disk in 1 table. */
! 86: RF_StripeCount_t FullTableDepthInPUs;
! 87: /* PUs on one disk in 1 fulltable. */
! 88: RF_StripeCount_t FullTableLimitSUID;
! 89: /* SU where partial fulltables start. */
! 90: RF_StripeCount_t ExtraTablesPerDisk;
! 91: /* Number of tables in last fulltable. */
! 92: RF_SectorNum_t DiskOffsetOfLastFullTableInSUs;
! 93: /* Disk offsets of partial fulltable, if any. */
! 94: RF_StripeCount_t numCompleteFullTablesPerDisk;
! 95: /* Fulltable identifier of partial fulltable, if any. */
! 96: u_int Lambda;
! 97: /* The pair count in the block design. */
! 98:
! 99: /* These are used only in the distributed-sparing case. */
! 100: RF_StripeCount_t FullTablesPerSpareRegion;
! 101: /* Number of fulltables comprising 1 spare region. */
! 102: RF_StripeCount_t TablesPerSpareRegion;
! 103: /* Number of tables. */
! 104: RF_SectorCount_t SpareSpaceDepthPerRegionInSUs;
! 105: /* Spare space/disk/region. */
! 106: RF_SectorCount_t SpareRegionDepthInSUs;
! 107: /* Number of units/disk/region. */
! 108: RF_SectorNum_t DiskOffsetOfLastSpareSpaceChunkInSUs;
! 109: /* Locates spare space after partial fulltable. */
! 110: RF_StripeCount_t TotSparePUsPerDisk;
! 111: /* Total number of spare PUs per disk. */
! 112: RF_StripeCount_t NumCompleteSRs;
! 113: RF_SpareTableEntry_t **SpareTable;
! 114: /* Remap table for spare space. */
! 115: char sparemap_fname[RF_SPAREMAP_NAME_LEN];
! 116: /* Where to find sparemap. Not used in kernel. */
! 117: };
! 118:
! 119: int rf_ConfigureDeclustered(RF_ShutdownList_t **, RF_Raid_t *, RF_Config_t *);
! 120: int rf_ConfigureDeclusteredDS(RF_ShutdownList_t **, RF_Raid_t *,
! 121: RF_Config_t *);
! 122:
! 123: void rf_MapSectorDeclustered(RF_Raid_t *, RF_RaidAddr_t, RF_RowCol_t *,
! 124: RF_RowCol_t *, RF_SectorNum_t *, int);
! 125: void rf_MapParityDeclustered(RF_Raid_t *, RF_RaidAddr_t, RF_RowCol_t *,
! 126: RF_RowCol_t *, RF_SectorNum_t *, int);
! 127: void rf_IdentifyStripeDeclustered(RF_Raid_t *, RF_RaidAddr_t, RF_RowCol_t **,
! 128: RF_RowCol_t *);
! 129: void rf_MapSIDToPSIDDeclustered(RF_RaidLayout_t *, RF_StripeNum_t,
! 130: RF_StripeNum_t *, RF_ReconUnitNum_t *);
! 131: int rf_InstallSpareTable(RF_Raid_t *, RF_RowCol_t, RF_RowCol_t);
! 132: void rf_FreeSpareTable(RF_Raid_t *);
! 133:
! 134: RF_HeadSepLimit_t rf_GetDefaultHeadSepLimitDeclustered(RF_Raid_t *);
! 135: int rf_GetDefaultNumFloatingReconBuffersDeclustered(RF_Raid_t *);
! 136:
! 137: void rf_decluster_adjust_params(RF_RaidLayout_t *, RF_StripeNum_t *,
! 138: RF_StripeCount_t *, RF_StripeCount_t *, RF_StripeNum_t *);
! 139: void rf_remap_to_spare_space(RF_RaidLayout_t *, RF_DeclusteredConfigInfo_t *,
! 140: RF_RowCol_t, RF_StripeNum_t, RF_StripeNum_t, RF_SectorNum_t,
! 141: RF_StripeNum_t, RF_StripeNum_t, RF_RowCol_t *, RF_StripeNum_t *);
! 142: int rf_SetSpareTable(RF_Raid_t *, void *);
! 143: RF_ReconUnitCount_t rf_GetNumSpareRUsDeclustered(RF_Raid_t *);
! 144:
! 145: #endif /* ! _RF__RF_DECLUSTER_H_ */
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to rf_decluster.h CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / dev / raidframe