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rf_sstf.h revision 1.5.182.1 
      1  1.5.182.1  thorpej /*	$NetBSD: rf_sstf.h,v 1.5.182.1 2021/08/01 22:42:31 thorpej Exp $	*/
      2        1.1    oster /*
      3        1.1    oster  * Copyright (c) 1995 Carnegie-Mellon University.
      4        1.1    oster  * All rights reserved.
      5        1.1    oster  *
      6        1.1    oster  * Author: Jim Zelenka
      7        1.1    oster  *
      8        1.1    oster  * Permission to use, copy, modify and distribute this software and
      9        1.1    oster  * its documentation is hereby granted, provided that both the copyright
     10        1.1    oster  * notice and this permission notice appear in all copies of the
     11        1.1    oster  * software, derivative works or modified versions, and any portions
     12        1.1    oster  * thereof, and that both notices appear in supporting documentation.
     13        1.1    oster  *
     14        1.1    oster  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15        1.1    oster  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     16        1.1    oster  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17        1.1    oster  *
     18        1.1    oster  * Carnegie Mellon requests users of this software to return to
     19        1.1    oster  *
     20        1.1    oster  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21        1.1    oster  *  School of Computer Science
     22        1.1    oster  *  Carnegie Mellon University
     23        1.1    oster  *  Pittsburgh PA 15213-3890
     24        1.1    oster  *
     25        1.1    oster  * any improvements or extensions that they make and grant Carnegie the
     26        1.1    oster  * rights to redistribute these changes.
     27        1.1    oster  */
     28        1.1    oster 
     29        1.1    oster #ifndef _RF__RF_SSTF_H_
     30        1.1    oster #define _RF__RF_SSTF_H_
     31        1.1    oster 
     32        1.1    oster #include "rf_diskqueue.h"
     33        1.1    oster 
     34        1.1    oster typedef struct RF_SstfQ_s {
     35        1.3    oster 	RF_DiskQueueData_t *queue;
     36        1.3    oster 	RF_DiskQueueData_t *qtail;
     37        1.3    oster 	int     qlen;
     38        1.3    oster }       RF_SstfQ_t;
     39        1.1    oster 
     40        1.1    oster typedef struct RF_Sstf_s {
     41        1.3    oster 	RF_SstfQ_t left;
     42        1.3    oster 	RF_SstfQ_t right;
     43        1.3    oster 	RF_SstfQ_t lopri;
     44        1.3    oster 	RF_SectorNum_t last_sector;
     45        1.3    oster 	int     dir;
     46        1.3    oster 	int     allow_reverse;
     47        1.3    oster }       RF_Sstf_t;
     48        1.3    oster 
     49        1.3    oster void   *
     50        1.3    oster rf_SstfCreate(RF_SectorCount_t sect_per_disk,
     51        1.3    oster     RF_AllocListElem_t * cl_list, RF_ShutdownList_t ** listp);
     52        1.3    oster void   *
     53        1.3    oster rf_ScanCreate(RF_SectorCount_t sect_per_disk,
     54        1.3    oster     RF_AllocListElem_t * cl_list, RF_ShutdownList_t ** listp);
     55        1.3    oster void   *
     56        1.3    oster rf_CscanCreate(RF_SectorCount_t sect_per_disk,
     57        1.3    oster     RF_AllocListElem_t * cl_list, RF_ShutdownList_t ** listp);
     58        1.3    oster void    rf_SstfEnqueue(void *qptr, RF_DiskQueueData_t * req, int priority);
     59        1.1    oster RF_DiskQueueData_t *rf_SstfDequeue(void *qptr);
     60        1.4    perry int
     61        1.3    oster rf_SstfPromote(void *qptr, RF_StripeNum_t parityStripeID,
     62        1.3    oster     RF_ReconUnitNum_t which_ru);
     63        1.1    oster RF_DiskQueueData_t *rf_ScanDequeue(void *qptr);
     64        1.1    oster RF_DiskQueueData_t *rf_CscanDequeue(void *qptr);
     65        1.1    oster 
     66        1.3    oster #endif				/* !_RF__RF_SSTF_H_ */
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