211 lines
8.2 KiB
C
211 lines
8.2 KiB
C
/* $NetBSD: rf_dag.h,v 1.18 2005/05/29 22:03:09 christos Exp $ */
|
|
/*
|
|
* Copyright (c) 1995 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: William V. Courtright II, 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.
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* *
|
|
* dag.h -- header file for DAG-related data structures *
|
|
* *
|
|
****************************************************************************/
|
|
|
|
#ifndef _RF__RF_DAG_H_
|
|
#define _RF__RF_DAG_H_
|
|
|
|
#include <dev/raidframe/raidframevar.h>
|
|
|
|
#include "rf_threadstuff.h"
|
|
#include "rf_alloclist.h"
|
|
#include "rf_stripelocks.h"
|
|
#include "rf_layout.h"
|
|
#include "rf_dagflags.h"
|
|
#include "rf_acctrace.h"
|
|
#include "rf_desc.h"
|
|
|
|
#define RF_THREAD_CONTEXT 0 /* we were invoked from thread context */
|
|
#define RF_INTR_CONTEXT 1 /* we were invoked from interrupt context */
|
|
#define RF_MAX_ANTECEDENTS 20 /* max num of antecedents a node may posses */
|
|
|
|
#include <sys/buf.h>
|
|
|
|
struct RF_PropHeader_s { /* structure for propagation of results */
|
|
int paramNum; /* to parameter # paramNum */
|
|
RF_PropHeader_t *next; /* linked list for multiple results/params */
|
|
};
|
|
|
|
typedef enum RF_NodeStatus_e {
|
|
rf_wait, /* node is waiting to be executed */
|
|
rf_fired, /* node is currently executing its do function */
|
|
rf_good, /* node successfully completed execution of
|
|
* its do function */
|
|
rf_bad, /* node failed to successfully execute its do
|
|
* function */
|
|
rf_skipped, /* not used anymore, used to imply a node was
|
|
* not executed */
|
|
rf_recover, /* node is currently executing its undo
|
|
* function */
|
|
rf_panic, /* node failed to successfully execute its
|
|
* undo function */
|
|
rf_undone /* node successfully executed its undo
|
|
* function */
|
|
} RF_NodeStatus_t;
|
|
/*
|
|
* These were used to control skipping a node.
|
|
* Now, these are only used as comments.
|
|
*/
|
|
typedef enum RF_AntecedentType_e {
|
|
rf_trueData,
|
|
rf_antiData,
|
|
rf_outputData,
|
|
rf_control
|
|
} RF_AntecedentType_t;
|
|
#define RF_DAG_PTRCACHESIZE 40
|
|
#define RF_DAG_PARAMCACHESIZE 12
|
|
|
|
typedef RF_uint8 RF_DagNodeFlags_t;
|
|
|
|
struct RF_DagNode_s {
|
|
RF_NodeStatus_t status; /* current status of this node */
|
|
int (*doFunc) (RF_DagNode_t *); /* normal function */
|
|
int (*undoFunc) (RF_DagNode_t *); /* func to remove effect of
|
|
* doFunc */
|
|
int (*wakeFunc) (RF_DagNode_t *, int status); /* func called when the
|
|
* node completes an I/O */
|
|
int numParams; /* number of parameters required by *funcPtr */
|
|
int numResults; /* number of results produced by *funcPtr */
|
|
int numAntecedents; /* number of antecedents */
|
|
int numAntDone; /* number of antecedents which have finished */
|
|
int numSuccedents; /* number of succedents */
|
|
int numSuccFired; /* incremented when a succedent is fired
|
|
* during forward execution */
|
|
int numSuccDone; /* incremented when a succedent finishes
|
|
* during rollBackward */
|
|
int commitNode; /* boolean flag - if true, this is a commit
|
|
* node */
|
|
RF_DagNode_t **succedents; /* succedents, array size
|
|
* numSuccedents */
|
|
RF_DagNode_t **antecedents; /* antecedents, array size
|
|
* numAntecedents */
|
|
RF_AntecedentType_t antType[RF_MAX_ANTECEDENTS]; /* type of each
|
|
* antecedent */
|
|
void **results; /* array of results produced by *funcPtr */
|
|
RF_DagParam_t *params; /* array of parameters required by *funcPtr */
|
|
RF_PropHeader_t **propList; /* propagation list, size
|
|
* numSuccedents */
|
|
RF_DagHeader_t *dagHdr; /* ptr to head of dag containing this node */
|
|
void *dagFuncData; /* dag execution func uses this for whatever
|
|
* it wants */
|
|
RF_DagNode_t *next; /* next in terms of propagating results */
|
|
RF_DagNode_t *list_next; /* next in the list of DAG nodes for this DAG */
|
|
int nodeNum; /* used by PrintDAG for debug only */
|
|
int visited; /* used to avoid re-visiting nodes on DAG
|
|
* walks */
|
|
/* ANY CODE THAT USES THIS FIELD MUST MAINTAIN THE PROPERTY THAT AFTER
|
|
* IT FINISHES, ALL VISITED FLAGS IN THE DAG ARE IDENTICAL */
|
|
const char *name; /* debug only */
|
|
RF_DagNodeFlags_t flags;/* see below */
|
|
RF_DagNode_t *big_dag_ptrs; /* used in cases where the cache below isn't big enough */
|
|
RF_DagParam_t *big_dag_params; /* used when the cache below isn't big enough */
|
|
RF_DagNode_t *dag_ptrs[RF_DAG_PTRCACHESIZE]; /* cache for performance */
|
|
RF_DagParam_t dag_params[RF_DAG_PARAMCACHESIZE]; /* cache for performance */
|
|
};
|
|
/*
|
|
* Bit values for flags field of RF_DagNode_t
|
|
*/
|
|
#define RF_DAGNODE_FLAG_NONE 0x00
|
|
#define RF_DAGNODE_FLAG_YIELD 0x01 /* in the kernel, yield the processor
|
|
* before firing this node */
|
|
|
|
/* enable - DAG ready for normal execution, no errors encountered
|
|
* rollForward - DAG encountered an error after commit point, rolling forward
|
|
* rollBackward - DAG encountered an error prior to commit point, rolling backward
|
|
*/
|
|
typedef enum RF_DagStatus_e {
|
|
rf_enable,
|
|
rf_rollForward,
|
|
rf_rollBackward
|
|
} RF_DagStatus_t;
|
|
#define RF_MAX_HDR_SUCC 1
|
|
|
|
struct RF_DagHeader_s {
|
|
RF_DagStatus_t status; /* status of this DAG */
|
|
int numSuccedents; /* DAG may be a tree, i.e. may have > 1 root */
|
|
int numCommitNodes; /* number of commit nodes in graph */
|
|
int numCommits; /* number of commit nodes which have been
|
|
* fired */
|
|
RF_DagNode_t *succedents[RF_MAX_HDR_SUCC]; /* array of succedents,
|
|
* size numSuccedents */
|
|
RF_DagHeader_t *next; /* ptr to allow a list of dags */
|
|
RF_AllocListElem_t *allocList; /* ptr to list of ptrs to be freed
|
|
* prior to freeing DAG */
|
|
RF_AccessStripeMapHeader_t *asmList; /* list of access stripe maps
|
|
* to be freed */
|
|
int nodeNum; /* used by PrintDAG for debug only */
|
|
int numNodesCompleted;
|
|
#if RF_ACC_TRACE > 0
|
|
RF_AccTraceEntry_t *tracerec; /* perf mon only */
|
|
#endif
|
|
void (*cbFunc) (void *); /* function to call when the dag
|
|
* completes */
|
|
void *cbArg; /* argument for cbFunc */
|
|
const char *creator; /* name of function used to create this dag */
|
|
RF_DagNode_t *nodes; /* linked list of nodes used in this DAG */
|
|
RF_PhysDiskAddr_t *pda_cleanup_list; /* for PDAs that can't get
|
|
cleaned up any other way... */
|
|
RF_Raid_t *raidPtr; /* the descriptor for the RAID device this DAG
|
|
* is for */
|
|
RF_RaidAccessDesc_t *desc; /* ptr to descriptor for this access */
|
|
void *bp; /* the bp for this I/O passed down from the
|
|
* file system. ignored outside kernel */
|
|
};
|
|
|
|
struct RF_DagList_s {
|
|
/* common info for a list of dags which will be fired sequentially */
|
|
int numDags; /* number of dags in the list */
|
|
int numDagsFired; /* number of dags in list which have initiated
|
|
* execution */
|
|
int numDagsDone; /* number of dags in list which have completed
|
|
* execution */
|
|
RF_DagHeader_t *dags; /* list of dags */
|
|
RF_RaidAccessDesc_t *desc; /* ptr to descriptor for this access */
|
|
RF_AccTraceEntry_t tracerec; /* perf mon info for dags (not user
|
|
* info) */
|
|
struct RF_DagList_s *next; /* next DagList, if any */
|
|
};
|
|
|
|
/* convience macro for declaring a create dag function */
|
|
|
|
#define RF_CREATE_DAG_FUNC_DECL(_name_) \
|
|
void _name_ ( \
|
|
RF_Raid_t *raidPtr, \
|
|
RF_AccessStripeMap_t *asmap, \
|
|
RF_DagHeader_t *dag_h, \
|
|
void *bp, \
|
|
RF_RaidAccessFlags_t flags, \
|
|
RF_AllocListElem_t *allocList)
|
|
|
|
#endif /* !_RF__RF_DAG_H_ */
|