1eecf8e491
out-dated comments, and other unneeded stuff. This helps prepare for cleaning up the rest of the code, and adding new functionality. No functional changes to the kernel code in this commit.
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/* $NetBSD: rf_sstf.h,v 1.2 1999/01/26 02:34:02 oster Exp $ */
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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_SSTF_H_
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#define _RF__RF_SSTF_H_
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#include "rf_diskqueue.h"
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typedef struct RF_SstfQ_s {
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RF_DiskQueueData_t *queue;
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RF_DiskQueueData_t *qtail;
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int qlen;
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} RF_SstfQ_t;
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typedef struct RF_Sstf_s {
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RF_SstfQ_t left;
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RF_SstfQ_t right;
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RF_SstfQ_t lopri;
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RF_SectorNum_t last_sector;
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int dir;
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int allow_reverse;
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} RF_Sstf_t;
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void *rf_SstfCreate(RF_SectorCount_t sect_per_disk,
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RF_AllocListElem_t *cl_list, RF_ShutdownList_t **listp);
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void *rf_ScanCreate(RF_SectorCount_t sect_per_disk,
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RF_AllocListElem_t *cl_list, RF_ShutdownList_t **listp);
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void *rf_CscanCreate(RF_SectorCount_t sect_per_disk,
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RF_AllocListElem_t *cl_list, RF_ShutdownList_t **listp);
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void rf_SstfEnqueue(void *qptr, RF_DiskQueueData_t *req, int priority);
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RF_DiskQueueData_t *rf_SstfDequeue(void *qptr);
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RF_DiskQueueData_t *rf_SstfPeek(void *qptr);
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int rf_SstfPromote(void *qptr, RF_StripeNum_t parityStripeID,
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RF_ReconUnitNum_t which_ru);
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RF_DiskQueueData_t *rf_ScanDequeue(void *qptr);
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RF_DiskQueueData_t *rf_ScanPeek(void *qptr);
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RF_DiskQueueData_t *rf_CscanDequeue(void *qptr);
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RF_DiskQueueData_t *rf_CscanPeek(void *qptr);
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#endif /* !_RF__RF_SSTF_H_ */
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