blob: 8a6951b51703a30329b34f4ff0bf228f5505c39c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/* $FreeBSD$ */
/* $NetBSD: rf_desc.h,v 1.5 2000/01/09 00:00:18 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland
*
* 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.
*/
#ifndef _RF__RF_DESC_H_
#define _RF__RF_DESC_H_
#include <dev/raidframe/rf_archs.h>
#include <dev/raidframe/rf_types.h>
#include <dev/raidframe/rf_etimer.h>
#include <dev/raidframe/rf_dag.h>
struct RF_RaidReconDesc_s {
RF_Raid_t *raidPtr; /* raid device descriptor */
RF_RowCol_t row; /* row of failed disk */
RF_RowCol_t col; /* col of failed disk */
int state; /* how far along the reconstruction operation
* has gotten */
RF_RaidDisk_t *spareDiskPtr; /* describes target disk for recon
* (not used in dist sparing) */
int numDisksDone; /* the number of surviving disks that have
* completed their work */
RF_RowCol_t srow; /* row ID of the spare disk (not used in dist
* sparing) */
RF_RowCol_t scol; /* col ID of the spare disk (not used in dist
* sparing) */
/*
* Prevent recon from hogging CPU
*/
RF_Etimer_t recon_exec_timer;
RF_uint64 reconExecTimerRunning;
RF_uint64 reconExecTicks;
RF_uint64 maxReconExecTicks;
#if RF_RECON_STATS > 0
RF_uint64 hsStallCount; /* head sep stall count */
RF_uint64 numReconExecDelays;
RF_uint64 numReconEventWaits;
#endif /* RF_RECON_STATS > 0 */
RF_RaidReconDesc_t *next;
};
struct RF_RaidAccessDesc_s {
RF_Raid_t *raidPtr; /* raid device descriptor */
RF_IoType_t type; /* read or write */
RF_RaidAddr_t raidAddress; /* starting address in raid address
* space */
RF_SectorCount_t numBlocks; /* number of blocks (sectors) to
* transfer */
RF_StripeCount_t numStripes; /* number of stripes involved in
* access */
caddr_t bufPtr; /* pointer to data buffer */
RF_RaidAccessFlags_t flags; /* flags controlling operation */
int state; /* index into states telling how far along the
* RAID operation has gotten */
RF_AccessState_t *states; /* array of states to be run */
int status; /* pass/fail status of the last operation */
RF_DagList_t *dagArray; /* array of dag lists, one list per stripe */
RF_AccessStripeMapHeader_t *asmap; /* the asm for this I/O */
void *bp; /* buf pointer for this RAID acc. ignored
* outside the kernel */
RF_DagHeader_t **paramDAG; /* allows the DAG to be returned to
* the caller after I/O completion */
RF_AccessStripeMapHeader_t **paramASM; /* allows the ASM to be
* returned to the caller
* after I/O completion */
RF_AccTraceEntry_t tracerec; /* perf monitoring information for a
* user access (not for dag stats) */
void (*callbackFunc) (RF_CBParam_t); /* callback function for this
* I/O */
void *callbackArg; /* arg to give to callback func */
RF_AllocListElem_t *cleanupList; /* memory to be freed at the
* end of the access */
RF_RaidAccessDesc_t *next;
RF_RaidAccessDesc_t *head;
int numPending;
RF_DECLARE_MUTEX(mutex) /* these are used to implement
* blocking I/O */
RF_DECLARE_COND(cond)
int async_flag;
RF_Etimer_t timer; /* used for timing this access */
};
#endif /* !_RF__RF_DESC_H_ */
|
