| 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 | |