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Annotation of sys/dev/raidframe/rf_sstf.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: rf_sstf.h,v 1.3 2002/12/16 07:01:05 tdeval Exp $      */
        !             2: /*     $NetBSD: rf_sstf.h,v 1.3 1999/02/05 00:06:17 oster Exp $        */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1995 Carnegie-Mellon University.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Author: Jim Zelenka
        !             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: #ifndef        _RF__RF_SSTF_H_
        !            32: #define        _RF__RF_SSTF_H_
        !            33:
        !            34: #include "rf_diskqueue.h"
        !            35:
        !            36: typedef struct RF_SstfQ_s {
        !            37:        RF_DiskQueueData_t      *queue;
        !            38:        RF_DiskQueueData_t      *qtail;
        !            39:        int                      qlen;
        !            40: } RF_SstfQ_t;
        !            41:
        !            42: typedef struct RF_Sstf_s {
        !            43:        RF_SstfQ_t               left;
        !            44:        RF_SstfQ_t               right;
        !            45:        RF_SstfQ_t               lopri;
        !            46:        RF_SectorNum_t           last_sector;
        !            47:        int                      dir;
        !            48:        int                      allow_reverse;
        !            49: } RF_Sstf_t;
        !            50:
        !            51: void *rf_SstfCreate(RF_SectorCount_t, RF_AllocListElem_t *,
        !            52:        RF_ShutdownList_t **);
        !            53: void *rf_ScanCreate(RF_SectorCount_t, RF_AllocListElem_t *,
        !            54:        RF_ShutdownList_t **);
        !            55: void *rf_CscanCreate(RF_SectorCount_t, RF_AllocListElem_t *,
        !            56:        RF_ShutdownList_t **);
        !            57: void  rf_SstfEnqueue(void *, RF_DiskQueueData_t *, int);
        !            58: RF_DiskQueueData_t *rf_SstfDequeue(void *);
        !            59: RF_DiskQueueData_t *rf_SstfPeek(void *);
        !            60: int   rf_SstfPromote(void *, RF_StripeNum_t, RF_ReconUnitNum_t);
        !            61: RF_DiskQueueData_t *rf_ScanDequeue(void *);
        !            62: RF_DiskQueueData_t *rf_ScanPeek(void *);
        !            63: RF_DiskQueueData_t *rf_CscanDequeue(void *);
        !            64: RF_DiskQueueData_t *rf_CscanPeek(void *);
        !            65:
        !            66: #endif /* !_RF__RF_SSTF_H_ */