f1a1ad338d
Drastically reduces the amount of time spent rewriting parity after an unclean shutdown by keeping better track of which regions might have had outstanding writes. Enabled by default; can be disabled on a per-set basis, or tuned, with the new raidctl(8) commands. Discussed on tech-kern@ to a general air of approval; exhortations to commit from mrg@, christos@, and others. Thanks to Google for their sponsorship, oster@ for mentoring the project, assorted developers for trying very hard to break it, and probably more I'm forgetting.
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* $NetBSD: rf_kintf.h,v 1.21 2009/11/17 18:54:26 jld Exp $ */
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/*
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* rf_kintf.h
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*
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* RAIDframe exported kernel interface
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*/
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Jim Zelenka
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef _RF__RF_KINTF_H_
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#define _RF__RF_KINTF_H_
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#include <dev/raidframe/raidframevar.h>
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int rf_GetSpareTableFromDaemon(RF_SparetWait_t * req);
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void raidstart(RF_Raid_t * raidPtr);
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int rf_DispatchKernelIO(RF_DiskQueue_t * queue, RF_DiskQueueData_t * req);
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int raidfetch_component_label(RF_Raid_t *, RF_RowCol_t);
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RF_ComponentLabel_t *raidget_component_label(RF_Raid_t *, RF_RowCol_t);
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int raidflush_component_label(RF_Raid_t *, RF_RowCol_t);
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void rf_paritymap_kern_write(RF_Raid_t *, struct rf_paritymap_ondisk *);
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void rf_paritymap_kern_read(RF_Raid_t *, struct rf_paritymap_ondisk *);
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#define RF_NORMAL_COMPONENT_UPDATE 0
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#define RF_FINAL_COMPONENT_UPDATE 1
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void rf_update_component_labels(RF_Raid_t *, int);
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int raidmarkclean(RF_Raid_t *, RF_RowCol_t);
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int raidmarkdirty(RF_Raid_t *, RF_RowCol_t);
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void raid_init_component_label(RF_Raid_t *, RF_ComponentLabel_t *);
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void rf_print_component_label(RF_ComponentLabel_t *);
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void rf_UnconfigureVnodes( RF_Raid_t * );
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void rf_close_component( RF_Raid_t *, struct vnode *, int);
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void rf_disk_unbusy(RF_RaidAccessDesc_t *);
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int rf_getdisksize(struct vnode *, struct lwp *, RF_RaidDisk_t *);
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int rf_sync_component_caches(RF_Raid_t *raidPtr);
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#endif /* _RF__RF_KINTF_H_ */
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