1 | /* $NetBSD: rf_desc.h,v 1.20 2007/03/04 06:02:36 christos Exp $ */ |
2 | /* |
3 | * Copyright (c) 1995 Carnegie-Mellon University. |
4 | * All rights reserved. |
5 | * |
6 | * Author: Mark Holland |
7 | * |
8 | * Permission to use, copy, modify and distribute this software and |
9 | * its documentation is hereby granted, provided that both the copyright |
10 | * notice and this permission notice appear in all copies of the |
11 | * software, derivative works or modified versions, and any portions |
12 | * thereof, and that both notices appear in supporting documentation. |
13 | * |
14 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
15 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND |
16 | * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
17 | * |
18 | * Carnegie Mellon requests users of this software to return to |
19 | * |
20 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
21 | * School of Computer Science |
22 | * Carnegie Mellon University |
23 | * Pittsburgh PA 15213-3890 |
24 | * |
25 | * any improvements or extensions that they make and grant Carnegie the |
26 | * rights to redistribute these changes. |
27 | */ |
28 | |
29 | #ifndef _RF__RF_DESC_H_ |
30 | #define _RF__RF_DESC_H_ |
31 | |
32 | #include <dev/raidframe/raidframevar.h> |
33 | |
34 | #include "rf_archs.h" |
35 | #include "rf_etimer.h" |
36 | #include "rf_dag.h" |
37 | #include "rf_layout.h" |
38 | |
39 | struct RF_RaidReconDesc_s { |
40 | RF_Raid_t *raidPtr; /* raid device descriptor */ |
41 | RF_RowCol_t col; /* col of failed disk */ |
42 | RF_RaidDisk_t *spareDiskPtr; /* describes target disk for recon |
43 | * (not used in dist sparing) */ |
44 | int numDisksDone; /* the number of surviving disks that have |
45 | * completed their work */ |
46 | RF_RowCol_t scol; /* col ID of the spare disk (not used in dist |
47 | * sparing) */ |
48 | /* |
49 | * Prevent recon from hogging CPU |
50 | */ |
51 | RF_Etimer_t recon_exec_timer; |
52 | RF_uint64 reconExecTimerRunning; |
53 | RF_uint64 reconExecTicks; |
54 | RF_uint64 maxReconExecTicks; |
55 | |
56 | #if RF_RECON_STATS > 0 |
57 | RF_uint64 hsStallCount; /* head sep stall count */ |
58 | RF_uint64 numReconExecDelays; |
59 | RF_uint64 numReconEventWaits; |
60 | #endif /* RF_RECON_STATS > 0 */ |
61 | RF_RaidReconDesc_t *next; |
62 | }; |
63 | |
64 | struct RF_RaidAccessDesc_s { |
65 | RF_Raid_t *raidPtr; /* raid device descriptor */ |
66 | RF_IoType_t type; /* read or write */ |
67 | RF_RaidAddr_t raidAddress; /* starting address in raid address |
68 | * space */ |
69 | RF_SectorCount_t numBlocks; /* number of blocks (sectors) to |
70 | * transfer */ |
71 | RF_StripeCount_t numStripes; /* number of stripes involved in |
72 | * access */ |
73 | void *bufPtr; /* pointer to data buffer */ |
74 | RF_RaidAccessFlags_t flags; /* flags controlling operation */ |
75 | int state; /* index into states telling how far along the |
76 | * RAID operation has gotten */ |
77 | const RF_AccessState_t *states; /* array of states to be run */ |
78 | int status; /* pass/fail status of the last operation */ |
79 | int numRetries; /* number of times this IO has been attempted */ |
80 | RF_DagList_t *dagList; /* list of dag lists, one list per stripe */ |
81 | RF_VoidPointerListElem_t *iobufs; /* iobufs that need to be cleaned |
82 | up at the end of this IO */ |
83 | RF_VoidPointerListElem_t *stripebufs; /* stripe buffers that need to |
84 | be cleaned up at the end of |
85 | this IO */ |
86 | RF_AccessStripeMapHeader_t *asmap; /* the asm for this I/O */ |
87 | struct buf *bp; /* buf pointer for this RAID acc */ |
88 | RF_AccTraceEntry_t tracerec; /* perf monitoring information for a |
89 | * user access (not for dag stats) */ |
90 | void (*callbackFunc) (RF_CBParam_t); /* callback function for this |
91 | * I/O */ |
92 | void *callbackArg; /* arg to give to callback func */ |
93 | RF_RaidAccessDesc_t *next; |
94 | int async_flag; |
95 | RF_Etimer_t timer; /* used for timing this access */ |
96 | }; |
97 | #endif /* !_RF__RF_DESC_H_ */ |
98 | |