diff options
Diffstat (limited to 'sys/dev/raidframe/rf_sstf.h')
| -rw-r--r-- | sys/dev/raidframe/rf_sstf.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/sys/dev/raidframe/rf_sstf.h b/sys/dev/raidframe/rf_sstf.h new file mode 100644 index 00000000000..9d81a090826 --- /dev/null +++ b/sys/dev/raidframe/rf_sstf.h @@ -0,0 +1,90 @@ +/* $OpenBSD: rf_sstf.h,v 1.1 1999/01/11 14:29:50 niklas Exp $ */ +/* $NetBSD: rf_sstf.h,v 1.1 1998/11/13 04:20:34 oster Exp $ */ +/* + * Copyright (c) 1995 Carnegie-Mellon University. + * All rights reserved. + * + * Author: Jim Zelenka + * + * Permission to use, copy, modify and distribute this software and + * its documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ + +/* : + * Log: rf_sstf.h,v + * Revision 1.6 1996/06/18 20:53:11 jimz + * fix up disk queueing (remove configure routine, + * add shutdown list arg to create routines) + * + * Revision 1.5 1996/06/13 20:42:08 jimz + * add scan, cscan + * + * Revision 1.4 1996/06/07 22:26:27 jimz + * type-ify which_ru (RF_ReconUnitNum_t) + * + * Revision 1.3 1996/06/07 21:33:04 jimz + * begin using consistent types for sector numbers, + * stripe numbers, row+col numbers, recon unit numbers + * + * Revision 1.2 1996/06/06 01:22:24 jimz + * minor cleanup + * + * Revision 1.1 1996/06/05 19:17:40 jimz + * Initial revision + * + */ + +#ifndef _RF__RF_SSTF_H_ +#define _RF__RF_SSTF_H_ + +#include "rf_diskqueue.h" + +typedef struct RF_SstfQ_s { + RF_DiskQueueData_t *queue; + RF_DiskQueueData_t *qtail; + int qlen; +} RF_SstfQ_t; + +typedef struct RF_Sstf_s { + RF_SstfQ_t left; + RF_SstfQ_t right; + RF_SstfQ_t lopri; + RF_SectorNum_t last_sector; + int dir; + int allow_reverse; +} RF_Sstf_t; + +void *rf_SstfCreate(RF_SectorCount_t sect_per_disk, + RF_AllocListElem_t *cl_list, RF_ShutdownList_t **listp); +void *rf_ScanCreate(RF_SectorCount_t sect_per_disk, + RF_AllocListElem_t *cl_list, RF_ShutdownList_t **listp); +void *rf_CscanCreate(RF_SectorCount_t sect_per_disk, + RF_AllocListElem_t *cl_list, RF_ShutdownList_t **listp); +void rf_SstfEnqueue(void *qptr, RF_DiskQueueData_t *req, int priority); +RF_DiskQueueData_t *rf_SstfDequeue(void *qptr); +RF_DiskQueueData_t *rf_SstfPeek(void *qptr); +int rf_SstfPromote(void *qptr, RF_StripeNum_t parityStripeID, + RF_ReconUnitNum_t which_ru); +RF_DiskQueueData_t *rf_ScanDequeue(void *qptr); +RF_DiskQueueData_t *rf_ScanPeek(void *qptr); +RF_DiskQueueData_t *rf_CscanDequeue(void *qptr); +RF_DiskQueueData_t *rf_CscanPeek(void *qptr); + +#endif /* !_RF__RF_SSTF_H_ */ |