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NetBSD/sys/dev/raidframe/rf_diskevent.c

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/* $NetBSD: rf_diskevent.c,v 1.1 1998/11/13 04:20:28 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Rachad Youssef
*
* 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.
*/
/*
* rf_diskevent. - support for disk device, by managing a heap of future events
* adapted from original code by David Kotz, Song Bac Toh (1994)
*/
/* :
* Log: rf_diskevent.c,v
* Revision 1.18 1996/07/28 20:31:39 jimz
* i386netbsd port
* true/false fixup
*
* Revision 1.17 1996/07/27 16:05:19 jimz
* return ENOMEM if DDEventInit fails its call to InitHeap
*
* Revision 1.16 1996/06/10 12:06:24 jimz
* fix spelling errors
*
* Revision 1.15 1996/06/10 11:55:47 jimz
* Straightened out some per-array/not-per-array distinctions, fixed
* a couple bugs related to confusion. Added shutdown lists. Removed
* layout shutdown function (now subsumed by shutdown lists).
*
* Revision 1.14 1996/06/07 21:33:04 jimz
* begin using consistent types for sector numbers,
* stripe numbers, row+col numbers, recon unit numbers
*
* Revision 1.13 1996/06/02 17:31:48 jimz
* Moved a lot of global stuff into array structure, where it belongs.
* Fixed up paritylogging, pss modules in this manner. Some general
* code cleanup. Removed lots of dead code, some dead files.
*
* Revision 1.12 1996/05/30 11:29:41 jimz
* Numerous bug fixes. Stripe lock release code disagreed with the taking code
* about when stripes should be locked (I made it consistent: no parity, no lock)
* There was a lot of extra serialization of I/Os which I've removed- a lot of
* it was to calculate values for the cache code, which is no longer with us.
* More types, function, macro cleanup. Added code to properly quiesce the array
* on shutdown. Made a lot of stuff array-specific which was (bogusly) general
* before. Fixed memory allocation, freeing bugs.
*
* Revision 1.11 1996/05/27 18:56:37 jimz
* more code cleanup
* better typing
* compiles in all 3 environments
*
* Revision 1.10 1996/05/24 04:28:55 jimz
* release cleanup ckpt
*
* Revision 1.9 1996/05/23 00:33:23 jimz
* code cleanup: move all debug decls to rf_options.c, all extern
* debug decls to rf_options.h, all debug vars preceded by rf_
*
* Revision 1.8 1996/05/18 19:51:34 jimz
* major code cleanup- fix syntax, make some types consistent,
* add prototypes, clean out dead code, et cetera
*
* Revision 1.7 1995/12/01 15:57:56 root
* added copyright info
*
*/
#include "rf_types.h"
#include "rf_heap.h"
#include "rf_diskevent.h"
#include "rf_general.h"
#include "rf_dag.h"
#include "rf_diskthreads.h"
#include "rf_states.h"
#include "rf_shutdown.h"
/* trace printing can be turned on/off in the Makefile */
RF_TICS_t rf_cur_time;
static RF_Owner_t cur_owner;
static RF_Heap_t heap;
static void rf_DDEventShutdown(ignored)
void *ignored;
{
rf_FreeHeap(heap);
}
/* ======================================================================== */
/* DDEventInit
*
* Initialize the event heap.
*/
int rf_DDEventInit(listp)
RF_ShutdownList_t **listp;
{
int rc;
heap = rf_InitHeap(RF_HEAP_MAX); /* initialize the heap */
if (heap == NULL)
return(ENOMEM);
rc = rf_ShutdownCreate(listp, rf_DDEventShutdown, NULL);
if (rc) {
RF_ERRORMSG3("RAIDFRAME: failed creating shutdown event file %s line %d rc=%d\n",
__FILE__, __LINE__, rc);
rf_FreeHeap(heap);
return(rc);
}
rf_cur_time=(RF_TICS_t)0;
return(0);
}
/* DDEventRequest
*
* Put an event request into the event heap.
*/
void rf_DDEventRequest(
RF_TICS_t eventTime,
int (*CompleteFunc)(),
void *argument,
RF_Owner_t owner,
RF_RowCol_t row,
RF_RowCol_t col,
RF_Raid_t *raidPtr,
void *diskid)
{
RF_HeapData_t *hpdat;
RF_Malloc(hpdat,sizeof(RF_HeapData_t),(RF_HeapData_t *) );
if (hpdat == NULL) {
fprintf(stderr, "DDEventRequest: malloc failed\n");
RF_PANIC();
}
hpdat->eventTime = eventTime;
hpdat->CompleteFunc = CompleteFunc;
hpdat->argument = argument;
hpdat->owner = owner;
hpdat->row = row;
hpdat->col = col;
hpdat->raidPtr = raidPtr;
hpdat->diskid = diskid;
rf_AddHeap(heap, hpdat, (hpdat->eventTime));
}
void rf_DAGEventRequest(
RF_TICS_t eventTime,
RF_Owner_t owner,
RF_RowCol_t row,
RF_RowCol_t col,
RF_RaidAccessDesc_t *desc,
RF_Raid_t *raidPtr)
{
RF_HeapData_t *hpdat;
RF_Malloc(hpdat,sizeof(RF_HeapData_t),(RF_HeapData_t *) );
if (hpdat == NULL) {
fprintf(stderr, "DDEventRequest: malloc failed\n");
RF_PANIC();
}
hpdat->eventTime = eventTime;
hpdat->CompleteFunc = NULL;
hpdat->argument = NULL;
hpdat->owner = owner;
hpdat->row = row;
hpdat->col = col;
hpdat->desc=desc;
hpdat->raidPtr = raidPtr;
rf_AddHeap(heap, hpdat, (hpdat->eventTime));
}
/* ------------------------------------------------------------------------ */
/* @SUBTITLE "Print out the request queue" */
/* There is only 1 request queue so no argument is needed for this
function */
void rf_DDPrintRequests()
{
RF_HeapData_t *Hpdat;
RF_HeapKey_t Hpkey;
RF_Heap_t tempHp;
printf("Events on heap:\n");
tempHp = rf_InitHeap(RF_HEAP_MAX);
while (rf_RemHeap(heap, &Hpdat, &Hpkey) != RF_HEAP_NONE)
{
printf ("at %5g HpKey there is: something for owner %d at disk %d %d\n",Hpkey,
Hpdat->owner,Hpdat->row,Hpdat->col);
rf_AddHeap(tempHp, Hpdat, Hpdat->eventTime);
}
printf("END heap:\n");
rf_FreeHeap(heap); /* free the empty old heap */
heap = tempHp; /* restore the recycled heap */
}
/* ------------------------------------------------------------------------ */
int rf_ProcessEvent()
{
RF_HeapData_t *Hpdat;
RF_HeapKey_t Hpkey;
int retcode;
retcode = rf_RemHeap(heap, &Hpdat, &Hpkey);
if (retcode==RF_HEAP_FOUND) {
if (rf_eventDebug) {
rf_DDPrintRequests();
printf ("Now processing: at %5g something for owner %d at disk %d %d\n",
Hpkey, Hpdat->owner, Hpdat->row, Hpdat->col);
}
rf_cur_time=Hpkey;
rf_SetCurrentOwner(Hpdat->owner);
if (Hpdat->row>=0) {/* ongoing dag event */
rf_SetDiskIdle (Hpdat->raidPtr, Hpdat->row, Hpdat->col);
if (Hpdat->diskid != NULL) {
rf_simulator_complete_io(Hpdat->diskid);
}
retcode=(Hpdat->CompleteFunc)(Hpdat->argument,0);
if (retcode==RF_HEAP_FOUND)
(((RF_DagNode_t *) (Hpdat->argument))->dagHdr->cbFunc)(((RF_DagNode_t *) (Hpdat->argument))->dagHdr->cbArg);
RF_Free(Hpdat,sizeof(RF_HeapData_t));
return(retcode);
}
else {
/* this is a dag event or reconstruction event */
if (Hpdat->row==RF_DD_DAGEVENT_ROW){ /* dag event */
rf_ContinueRaidAccess(Hpdat->desc);
retcode = RF_FALSE;
RF_Free(Hpdat,sizeof(RF_HeapData_t));
return (RF_FALSE);
}
else {
/* recon event */
retcode=(Hpdat->CompleteFunc)(Hpdat->argument,0);
retcode = RF_FALSE;
RF_Free(Hpdat,sizeof(RF_HeapData_t));
return (RF_FALSE);
}
}
}
if (rf_eventDebug)
printf("HEAP is empty\n");
return(RF_DD_NOTHING_THERE);
}
RF_Owner_t rf_GetCurrentOwner()
{
return(cur_owner);
}
void rf_SetCurrentOwner(RF_Owner_t owner)
{
cur_owner=owner;
}
RF_TICS_t rf_CurTime()
{
return(rf_cur_time);
}
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