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.
136 lines
6.2 KiB
C
136 lines
6.2 KiB
C
/* $NetBSD: raidframeio.h,v 1.6 2009/11/17 18:54:26 jld Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Greg Oster
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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: Mark Holland
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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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/*****************************************************
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*
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* raidframeio.h
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*
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* IOCTL's used by RAIDframe.
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*
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*****************************************************/
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#ifndef _RF_RAIDFRAMEIO_H_
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#define _RF_RAIDFRAMEIO_H_
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#include "raidframevar.h"
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/* 1 was RAIDFRAME_CONFIGURE */
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#define RAIDFRAME_SHUTDOWN _IO ('r', 2) /* shutdown the driver */
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#define RAIDFRAME_TUR _IOW ('r', 3, dev_t) /* debug only: test unit
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* ready */
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#define RAIDFRAME_TEST_ACC _IOWR('r', 4, struct rf_test_acc) /* run a test access */
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#define RAIDFRAME_FAIL_DISK _IOW ('r', 5, struct rf_recon_req) /* fail a disk &
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* optionally start
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* recon */
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#define RAIDFRAME_CHECK_RECON_STATUS _IOWR('r', 6, int) /* get reconstruction %
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* complete on indicated
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* row */
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#define RAIDFRAME_REWRITEPARITY _IO ('r', 7) /* rewrite (initialize)
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* all parity */
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#define RAIDFRAME_COPYBACK _IO ('r', 8) /* copy reconstructed
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* data back to replaced
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* disk */
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#define RAIDFRAME_SPARET_WAIT _IOR ('r', 9, RF_SparetWait_t) /* does not return until
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* kernel needs a spare
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* table */
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#define RAIDFRAME_SEND_SPARET _IOW ('r', 10, void *) /* used to send a spare
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* table down into the
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* kernel */
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#define RAIDFRAME_ABORT_SPARET_WAIT _IO ('r', 11) /* used to wake up the
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* sparemap daemon &
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* tell it to exit */
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#define RAIDFRAME_START_ATRACE _IO ('r', 12) /* start tracing
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* accesses */
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#define RAIDFRAME_STOP_ATRACE _IO ('r', 13) /* stop tracing accesses */
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#define RAIDFRAME_GET_SIZE _IOR ('r', 14, int) /* get size (# sectors)
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* in raid device */
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/* 15 was RAIDFRAME_GET_INFO */
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#define RAIDFRAME_RESET_ACCTOTALS _IO ('r', 16) /* reset AccTotals for
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* device */
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#define RAIDFRAME_GET_ACCTOTALS _IOR ('r', 17, RF_AccTotals_t) /* retrieve AccTotals
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* for device */
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#define RAIDFRAME_KEEP_ACCTOTALS _IOW ('r', 18, int) /* turn AccTotals on or
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* off for device */
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#define RAIDFRAME_GET_COMPONENT_LABEL _IOWR ('r', 19, RF_ComponentLabel_t *)
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#define RAIDFRAME_SET_COMPONENT_LABEL _IOW ('r', 20, RF_ComponentLabel_t)
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#define RAIDFRAME_INIT_LABELS _IOW ('r', 21, RF_ComponentLabel_t)
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#define RAIDFRAME_ADD_HOT_SPARE _IOW ('r', 22, RF_SingleComponent_t)
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#define RAIDFRAME_REMOVE_HOT_SPARE _IOW ('r', 23, RF_SingleComponent_t)
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#define RAIDFRAME_REBUILD_IN_PLACE _IOW ('r', 24, RF_SingleComponent_t)
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#define RAIDFRAME_CHECK_PARITY _IOWR ('r', 25, int)
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#define RAIDFRAME_CHECK_PARITYREWRITE_STATUS _IOWR ('r', 26, int)
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#define RAIDFRAME_CHECK_COPYBACK_STATUS _IOWR ('r', 27, int)
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#define RAIDFRAME_SET_AUTOCONFIG _IOWR ('r', 28, int)
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#define RAIDFRAME_SET_ROOT _IOWR ('r', 29, int)
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#define RAIDFRAME_DELETE_COMPONENT _IOW ('r', 30, RF_SingleComponent_t)
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#define RAIDFRAME_INCORPORATE_HOT_SPARE _IOW ('r', 31, RF_SingleComponent_t)
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/* 'Extended' status versions */
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#define RAIDFRAME_CHECK_RECON_STATUS_EXT _IOWR('r', 32, RF_ProgressInfo_t *)
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#define RAIDFRAME_CHECK_PARITYREWRITE_STATUS_EXT _IOWR ('r', 33, RF_ProgressInfo_t *)
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#define RAIDFRAME_CHECK_COPYBACK_STATUS_EXT _IOWR ('r', 34, RF_ProgressInfo_t *)
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#define RAIDFRAME_CONFIGURE _IOW ('r', 35, void *) /* configure the driver */
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#define RAIDFRAME_GET_INFO _IOWR('r', 36, RF_DeviceConfig_t *) /* get configuration */
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#define RAIDFRAME_PARITYMAP_STATUS _IOR('r', 37, struct rf_pmstat)
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#define RAIDFRAME_PARITYMAP_GET_DISABLE _IOR('r', 38, int)
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#define RAIDFRAME_PARITYMAP_SET_DISABLE _IOW('r', 39, int)
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#define RAIDFRAME_PARITYMAP_SET_PARAMS _IOW('r', 40, struct rf_pmparams)
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#endif /* !_RF_RAIDFRAMEIO_H_ */
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