Annotation of sys/dev/raidframe/rf_sstf.h, Revision 1.1.1.1
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_ */
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