225 lines
8.8 KiB
C
225 lines
8.8 KiB
C
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/* $NetBSD: rf_paritylog.h,v 1.1 1998/11/13 04:20:31 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: William V. Courtright II
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/* header file for parity log
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*
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* :
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* Log: rf_paritylog.h,v
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* Revision 1.21 1996/07/17 21:00:58 jimz
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* clean up timer interface, tracing
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*
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* Revision 1.20 1996/07/15 17:22:18 jimz
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* nit-pick code cleanup
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* resolve stdlib problems on DEC OSF
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*
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* Revision 1.19 1996/06/11 10:17:57 jimz
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* definitions and run state for parity logging thread
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*
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* Revision 1.18 1996/06/07 21:33:04 jimz
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* begin using consistent types for sector numbers,
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* stripe numbers, row+col numbers, recon unit numbers
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*
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* Revision 1.17 1996/06/05 18:06:02 jimz
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* Major code cleanup. The Great Renaming is now done.
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* Better modularity. Better typing. Fixed a bunch of
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* synchronization bugs. Made a lot of global stuff
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* per-desc or per-array. Removed dead code.
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*
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* Revision 1.16 1996/06/02 17:31:48 jimz
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* Moved a lot of global stuff into array structure, where it belongs.
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* Fixed up paritylogging, pss modules in this manner. Some general
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* code cleanup. Removed lots of dead code, some dead files.
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*
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* Revision 1.15 1996/05/31 22:26:54 jimz
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* fix a lot of mapping problems, memory allocation problems
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* found some weird lock issues, fixed 'em
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* more code cleanup
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*
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* Revision 1.14 1996/05/30 11:29:41 jimz
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* Numerous bug fixes. Stripe lock release code disagreed with the taking code
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* about when stripes should be locked (I made it consistent: no parity, no lock)
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* There was a lot of extra serialization of I/Os which I've removed- a lot of
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* it was to calculate values for the cache code, which is no longer with us.
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* More types, function, macro cleanup. Added code to properly quiesce the array
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* on shutdown. Made a lot of stuff array-specific which was (bogusly) general
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* before. Fixed memory allocation, freeing bugs.
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*
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* Revision 1.13 1996/05/23 00:33:23 jimz
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* code cleanup: move all debug decls to rf_options.c, all extern
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* debug decls to rf_options.h, all debug vars preceded by rf_
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*
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* Revision 1.12 1996/05/18 19:51:34 jimz
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* major code cleanup- fix syntax, make some types consistent,
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* add prototypes, clean out dead code, et cetera
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*
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* Revision 1.11 1995/12/06 20:54:58 wvcii
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* added prototyping
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*
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* Revision 1.10 1995/11/30 16:05:50 wvcii
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* added copyright info
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*
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* Revision 1.9 1995/10/07 05:09:27 wvcii
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* removed #define BYTESPERSECTOR 512
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*
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* Revision 1.8 1995/09/06 19:27:52 wvcii
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* added startTime to commonLogData
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*
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* Revision 1.7 1995/07/07 00:13:42 wvcii
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* this version free from deadlock, fails parity verification
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*
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*/
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#ifndef _RF__RF_PARITYLOG_H_
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#define _RF__RF_PARITYLOG_H_
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#include "rf_types.h"
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#define RF_DEFAULT_NUM_SECTORS_PER_LOG 64
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typedef int RF_RegionId_t;
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typedef enum RF_ParityRecordType_e {
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RF_STOP,
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RF_UPDATE,
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RF_OVERWRITE
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} RF_ParityRecordType_t;
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struct RF_CommonLogData_s {
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RF_DECLARE_MUTEX(mutex) /* protects cnt */
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int cnt; /* when 0, time to call wakeFunc */
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RF_Raid_t *raidPtr;
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/* int (*wakeFunc)(struct buf *); */
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int (*wakeFunc)(RF_DagNode_t *node, int status);
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void *wakeArg;
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RF_AccTraceEntry_t *tracerec;
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RF_Etimer_t startTime;
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caddr_t bufPtr;
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RF_ParityRecordType_t operation;
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RF_CommonLogData_t *next;
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};
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struct RF_ParityLogData_s {
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RF_RegionId_t regionID; /* this struct guaranteed to span a single region */
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int bufOffset; /* offset from common->bufPtr */
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RF_PhysDiskAddr_t diskAddress;
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RF_CommonLogData_t *common; /* info shared by one or more parityLogData structs */
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RF_ParityLogData_t *next;
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RF_ParityLogData_t *prev;
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};
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struct RF_ParityLogAppendQueue_s {
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RF_DECLARE_MUTEX(mutex)
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};
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struct RF_ParityLogRecord_s {
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RF_PhysDiskAddr_t parityAddr;
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RF_ParityRecordType_t operation;
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};
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struct RF_ParityLog_s {
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RF_RegionId_t regionID;
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int numRecords;
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int diskOffset;
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RF_ParityLogRecord_t *records;
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caddr_t bufPtr;
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RF_ParityLog_t *next;
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};
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struct RF_ParityLogQueue_s {
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RF_DECLARE_MUTEX(mutex)
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RF_ParityLog_t *parityLogs;
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};
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struct RF_RegionBufferQueue_s {
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RF_DECLARE_MUTEX(mutex)
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RF_DECLARE_COND(cond)
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int bufferSize;
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int totalBuffers; /* size of array 'buffers' */
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int availableBuffers; /* num available 'buffers' */
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int emptyBuffersIndex; /* stick next freed buffer here */
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int availBuffersIndex; /* grab next buffer from here */
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caddr_t *buffers; /* array buffers used to hold parity */
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};
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#define RF_PLOG_CREATED (1<<0) /* thread is created */
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#define RF_PLOG_RUNNING (1<<1) /* thread is running */
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#define RF_PLOG_TERMINATE (1<<2) /* thread is terminated (should exit) */
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#define RF_PLOG_SHUTDOWN (1<<3) /* thread is aware and exiting/exited */
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struct RF_ParityLogDiskQueue_s {
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RF_DECLARE_MUTEX(mutex) /* protects all vars in this struct */
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RF_DECLARE_COND(cond)
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int threadState; /* is thread running, should it shutdown (see above) */
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RF_ParityLog_t *flushQueue; /* list of parity logs to be flushed to log disk */
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RF_ParityLog_t *reintQueue; /* list of parity logs waiting to be reintegrated */
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RF_ParityLogData_t *bufHead; /* head of FIFO list of log data, waiting on a buffer */
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RF_ParityLogData_t *bufTail; /* tail of FIFO list of log data, waiting on a buffer */
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RF_ParityLogData_t *reintHead; /* head of FIFO list of log data, waiting on reintegration */
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RF_ParityLogData_t *reintTail; /* tail of FIFO list of log data, waiting on reintegration */
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RF_ParityLogData_t *logBlockHead; /* queue of work, blocked until a log is available */
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RF_ParityLogData_t *logBlockTail;
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RF_ParityLogData_t *reintBlockHead; /* queue of work, blocked until reintegration is complete */
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RF_ParityLogData_t *reintBlockTail;
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RF_CommonLogData_t *freeCommonList; /* list of unused common data structs */
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RF_ParityLogData_t *freeDataList; /* list of unused log data structs */
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};
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struct RF_DiskMap_s {
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RF_PhysDiskAddr_t parityAddr;
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RF_ParityRecordType_t operation;
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};
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struct RF_RegionInfo_s {
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RF_DECLARE_MUTEX(mutex) /* protects: diskCount, diskMap, loggingEnabled, coreLog */
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RF_DECLARE_MUTEX(reintMutex) /* protects: reintInProgress */
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int reintInProgress; /* flag used to suspend flushing operations */
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RF_SectorCount_t capacity; /* capacity of this region in sectors */
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RF_SectorNum_t regionStartAddr; /* starting disk address for this region */
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RF_SectorNum_t parityStartAddr; /* starting disk address for this region */
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RF_SectorCount_t numSectorsParity; /* number of parity sectors protected by this region */
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RF_SectorCount_t diskCount; /* num of sectors written to this region's disk log */
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RF_DiskMap_t *diskMap; /* in-core map of what's in this region's disk log */
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int loggingEnabled; /* logging enable for this region */
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RF_ParityLog_t *coreLog; /* in-core log for this region */
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};
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RF_ParityLogData_t *rf_CreateParityLogData(RF_ParityRecordType_t operation,
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RF_PhysDiskAddr_t *pda, caddr_t bufPtr, RF_Raid_t *raidPtr,
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int (*wakeFunc)(RF_DagNode_t *node, int status),
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void *wakeArg, RF_AccTraceEntry_t *tracerec,
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RF_Etimer_t startTime);
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RF_ParityLogData_t *rf_SearchAndDequeueParityLogData(RF_Raid_t *raidPtr,
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RF_RegionId_t regionID, RF_ParityLogData_t **head,
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RF_ParityLogData_t **tail, int ignoreLocks);
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void rf_ReleaseParityLogs(RF_Raid_t *raidPtr, RF_ParityLog_t *firstLog);
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int rf_ParityLogAppend(RF_ParityLogData_t *logData, int finish,
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RF_ParityLog_t **incomingLog, int clearReintFlag);
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void rf_EnableParityLogging(RF_Raid_t *raidPtr);
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#endif /* !_RF__RF_PARITYLOG_H_ */
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