After much delay and anticipation, welcome RAIDFrame into the FreeBSD

world.  This should be considered highly experimental.

Approved-by:	re

1 files changed, 141 insertions, 0 deletions

diff --git a/sys/dev/raidframe/rf_decluster.h b/sys/dev/raidframe/rf_decluster.h
new file mode 100644
index 0000000..a630298
--- /dev/null
+++ b/sys/dev/raidframe/rf_decluster.h
@@ -0,0 +1,141 @@
+/*	$FreeBSD$ */
+/*	$NetBSD: rf_decluster.h,v 1.3 1999/02/05 00:06:09 oster Exp $	*/
+/*
+ * 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.
+ */
+
+/*----------------------------------------------------------------------
+ *
+ * decluster.h -- header file for declustered layout code
+ *
+ * Adapted from raidSim version July 1994
+ * Created 10-21-92 (MCH)
+ *
+ *--------------------------------------------------------------------*/
+
+#ifndef _RF__RF_DECLUSTER_H_
+#define _RF__RF_DECLUSTER_H_
+
+#include <dev/raidframe/rf_types.h>
+
+/*
+ * These structures define the tables used to locate the spare unit
+ * associated with a particular data or parity unit, and to perform
+ * the associated inverse mapping.
+ */
+struct RF_SpareTableEntry_s {
+	u_int   spareDisk;	/* disk to which this block is spared */
+	u_int   spareBlockOffsetInSUs;	/* offset into spare table for that
+					 * disk */
+};
+#define RF_SPAREMAP_NAME_LEN 128
+
+/* this is the layout-specific info structure for the declustered layout.
+ */
+struct RF_DeclusteredConfigInfo_s {
+	RF_StripeCount_t groupSize;	/* no. of stripe units per parity
+					 * stripe */
+	RF_RowCol_t **LayoutTable;	/* the block design table */
+	RF_RowCol_t **OffsetTable;	/* the sector offset table */
+	RF_RowCol_t **BlockTable;	/* the block membership table */
+	RF_StripeCount_t SUsPerFullTable;	/* stripe units per full table */
+	RF_StripeCount_t SUsPerTable;	/* stripe units per table */
+	RF_StripeCount_t PUsPerBlock;	/* parity units per block */
+	RF_StripeCount_t SUsPerBlock;	/* stripe units per block */
+	RF_StripeCount_t BlocksPerTable;	/* block design tuples per
+						 * table */
+	RF_StripeCount_t NumParityReps;	/* tables per full table */
+	RF_StripeCount_t TableDepthInPUs;	/* PUs on one disk in 1 table */
+	RF_StripeCount_t FullTableDepthInPUs;	/* PUs on one disk in 1
+						 * fulltable */
+	RF_StripeCount_t FullTableLimitSUID;	/* SU where partial fulltables
+						 * start */
+	RF_StripeCount_t ExtraTablesPerDisk;	/* # of tables in last
+						 * fulltable */
+	RF_SectorNum_t DiskOffsetOfLastFullTableInSUs;	/* disk offs of partial
+							 * ft, if any */
+	RF_StripeCount_t numCompleteFullTablesPerDisk;	/* ft identifier of
+							 * partial ft, if any */
+	u_int   Lambda;		/* the pair count in the block design */
+
+	/* these are used only in the distributed-sparing case */
+	RF_StripeCount_t FullTablesPerSpareRegion;	/* # of ft's comprising
+							 * 1 spare region */
+	RF_StripeCount_t TablesPerSpareRegion;	/* # of tables */
+	RF_SectorCount_t SpareSpaceDepthPerRegionInSUs;	/* spare
+							 * space/disk/region */
+	RF_SectorCount_t SpareRegionDepthInSUs;	/* # of units/disk/region */
+	RF_SectorNum_t DiskOffsetOfLastSpareSpaceChunkInSUs;	/* locates sp space
+								 * after partial ft */
+	RF_StripeCount_t TotSparePUsPerDisk;	/* total number of spare PUs
+						 * per disk */
+	RF_StripeCount_t NumCompleteSRs;
+	RF_SpareTableEntry_t **SpareTable;	/* remap table for spare space */
+	char    sparemap_fname[RF_SPAREMAP_NAME_LEN];	/* where to find
+							 * sparemap. not used in
+							 * kernel */
+};
+
+int 
+rf_ConfigureDeclustered(RF_ShutdownList_t ** listp, RF_Raid_t * raidPtr,
+    RF_Config_t * cfgPtr);
+int 
+rf_ConfigureDeclusteredDS(RF_ShutdownList_t ** listp, RF_Raid_t * raidPtr,
+    RF_Config_t * cfgPtr);
+
+void 
+rf_MapSectorDeclustered(RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector,
+    RF_RowCol_t * row, RF_RowCol_t * col, RF_SectorNum_t * diskSector, int remap);
+void 
+rf_MapParityDeclustered(RF_Raid_t * raidPtr, RF_RaidAddr_t raidSector,
+    RF_RowCol_t * row, RF_RowCol_t * col, RF_SectorNum_t * diskSector, int remap);
+void 
+rf_IdentifyStripeDeclustered(RF_Raid_t * raidPtr, RF_RaidAddr_t addr,
+    RF_RowCol_t ** diskids, RF_RowCol_t * outRow);
+void 
+rf_MapSIDToPSIDDeclustered(RF_RaidLayout_t * layoutPtr,
+    RF_StripeNum_t stripeID, RF_StripeNum_t * psID,
+    RF_ReconUnitNum_t * which_ru);
+int     rf_InstallSpareTable(RF_Raid_t * raidPtr, RF_RowCol_t frow, RF_RowCol_t fcol);
+void    rf_FreeSpareTable(RF_Raid_t * raidPtr);
+
+RF_HeadSepLimit_t rf_GetDefaultHeadSepLimitDeclustered(RF_Raid_t * raidPtr);
+int     rf_GetDefaultNumFloatingReconBuffersDeclustered(RF_Raid_t * raidPtr);
+
+void 
+rf_decluster_adjust_params(RF_RaidLayout_t * layoutPtr,
+    RF_StripeNum_t * SUID, RF_StripeCount_t * sus_per_fulltable,
+    RF_StripeCount_t * fulltable_depth, RF_StripeNum_t * base_suid);
+void 
+rf_remap_to_spare_space(
+    RF_RaidLayout_t * layoutPtr,
+    RF_DeclusteredConfigInfo_t * info, RF_RowCol_t row, RF_StripeNum_t FullTableID,
+    RF_StripeNum_t TableID, RF_SectorNum_t BlockID, RF_StripeNum_t base_suid,
+    RF_StripeNum_t SpareRegion, RF_RowCol_t * outCol, RF_StripeNum_t * outSU);
+int     rf_SetSpareTable(RF_Raid_t * raidPtr, void *data);
+RF_ReconUnitCount_t rf_GetNumSpareRUsDeclustered(RF_Raid_t * raidPtr);
+
+#endif				/* !_RF__RF_DECLUSTER_H_ */