335 lines
9.5 KiB
C
335 lines
9.5 KiB
C
/* $NetBSD: rf_psstatus.c,v 1.34 2011/05/03 08:18:43 mrg Exp $ */
|
|
/*
|
|
* Copyright (c) 1995 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: 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.
|
|
*/
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* psstatus.c
|
|
*
|
|
* The reconstruction code maintains a bunch of status related to the parity
|
|
* stripes that are currently under reconstruction. This header file defines
|
|
* the status structures.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: rf_psstatus.c,v 1.34 2011/05/03 08:18:43 mrg Exp $");
|
|
|
|
#include <dev/raidframe/raidframevar.h>
|
|
|
|
#include "rf_raid.h"
|
|
#include "rf_general.h"
|
|
#include "rf_debugprint.h"
|
|
#include "rf_psstatus.h"
|
|
#include "rf_shutdown.h"
|
|
|
|
#if RF_DEBUG_PSS
|
|
#define Dprintf1(s,a) if (rf_pssDebug) rf_debug_printf(s,(void *)((unsigned long)a),NULL,NULL,NULL,NULL,NULL,NULL,NULL)
|
|
#define Dprintf2(s,a,b) if (rf_pssDebug) rf_debug_printf(s,(void *)((unsigned long)a),(void *)((unsigned long)b),NULL,NULL,NULL,NULL,NULL,NULL)
|
|
#define Dprintf3(s,a,b,c) if (rf_pssDebug) rf_debug_printf(s,(void *)((unsigned long)a),(void *)((unsigned long)b),(void *)((unsigned long)c),NULL,NULL,NULL,NULL,NULL)
|
|
#else
|
|
#define Dprintf1(s,a)
|
|
#define Dprintf2(s,a,b)
|
|
#define Dprintf3(s,a,b,c)
|
|
#endif
|
|
|
|
static void
|
|
RealPrintPSStatusTable(RF_Raid_t * raidPtr,
|
|
RF_PSStatusHeader_t * pssTable);
|
|
|
|
#define RF_MAX_FREE_PSS 32
|
|
#define RF_MIN_FREE_PSS 8
|
|
|
|
static void rf_ShutdownPSStatus(void *);
|
|
|
|
static void
|
|
rf_ShutdownPSStatus(void *arg)
|
|
{
|
|
|
|
pool_destroy(&rf_pools.pss);
|
|
}
|
|
|
|
int
|
|
rf_ConfigurePSStatus(RF_ShutdownList_t **listp)
|
|
{
|
|
|
|
rf_pool_init(&rf_pools.pss, sizeof(RF_ReconParityStripeStatus_t),
|
|
"raidpsspl", RF_MIN_FREE_PSS, RF_MAX_FREE_PSS);
|
|
rf_ShutdownCreate(listp, rf_ShutdownPSStatus, NULL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
rf_InitPSStatus(RF_Raid_t *raidPtr)
|
|
{
|
|
raidPtr->pssTableSize = RF_PSS_DEFAULT_TABLESIZE;
|
|
}
|
|
|
|
|
|
/*****************************************************************************************
|
|
* sets up the pss table
|
|
* We pre-allocate a bunch of entries to avoid as much as possible having to
|
|
* malloc up hash chain entries.
|
|
****************************************************************************************/
|
|
RF_PSStatusHeader_t *
|
|
rf_MakeParityStripeStatusTable(RF_Raid_t *raidPtr)
|
|
{
|
|
RF_PSStatusHeader_t *pssTable;
|
|
int i;
|
|
|
|
RF_Malloc(pssTable,
|
|
raidPtr->pssTableSize * sizeof(RF_PSStatusHeader_t),
|
|
(RF_PSStatusHeader_t *));
|
|
for (i = 0; i < raidPtr->pssTableSize; i++) {
|
|
rf_init_mutex2(pssTable[i].mutex, IPL_VM);
|
|
rf_init_cond2(pssTable[i].cond, "rfpsslk");
|
|
}
|
|
return (pssTable);
|
|
}
|
|
|
|
void
|
|
rf_FreeParityStripeStatusTable(RF_Raid_t *raidPtr,
|
|
RF_PSStatusHeader_t *pssTable)
|
|
{
|
|
int i;
|
|
|
|
#if RF_DEBUG_PSS
|
|
if (rf_pssDebug)
|
|
RealPrintPSStatusTable(raidPtr, pssTable);
|
|
|
|
for (i = 0; i < raidPtr->pssTableSize; i++) {
|
|
if (pssTable[i].chain) {
|
|
printf("ERROR: pss hash chain not null at recon shutdown\n");
|
|
}
|
|
}
|
|
#endif
|
|
for (i = 0; i < raidPtr->pssTableSize; i++) {
|
|
rf_destroy_mutex2(pssTable[i].mutex);
|
|
rf_destroy_cond2(pssTable[i].cond);
|
|
}
|
|
RF_Free(pssTable, raidPtr->pssTableSize * sizeof(RF_PSStatusHeader_t));
|
|
}
|
|
|
|
|
|
/* looks up the status structure for a parity stripe.
|
|
* if the create_flag is on, uses (and returns) newpssPtr if
|
|
* a parity status structure doesn't exist
|
|
* otherwise returns NULL if the status structure does not exist
|
|
*
|
|
* ASSUMES THE PSS DESCRIPTOR IS LOCKED UPON ENTRY
|
|
*
|
|
* flags - whether or not to use newpssPtr if the needed PSS
|
|
* doesn't exist and what flags to set it to initially
|
|
*/
|
|
RF_ReconParityStripeStatus_t *
|
|
rf_LookupRUStatus(RF_Raid_t *raidPtr, RF_PSStatusHeader_t *pssTable,
|
|
RF_StripeNum_t psID, RF_ReconUnitNum_t which_ru,
|
|
RF_PSSFlags_t flags, RF_ReconParityStripeStatus_t *newpssPtr)
|
|
{
|
|
RF_PSStatusHeader_t *hdr = &pssTable[RF_HASH_PSID(raidPtr, psID)];
|
|
RF_ReconParityStripeStatus_t *p, *pssPtr = hdr->chain;
|
|
|
|
for (p = pssPtr; p; p = p->next) {
|
|
if (p->parityStripeID == psID && p->which_ru == which_ru)
|
|
break;
|
|
}
|
|
|
|
if (!p && (flags & RF_PSS_CREATE)) {
|
|
p = newpssPtr;
|
|
p->next = hdr->chain;
|
|
hdr->chain = p;
|
|
|
|
p->parityStripeID = psID;
|
|
p->which_ru = which_ru;
|
|
p->flags = flags;
|
|
p->rbuf = NULL;
|
|
p->writeRbuf = NULL;
|
|
p->xorBufCount = 0;
|
|
p->blockCount = 0;
|
|
p->procWaitList = NULL;
|
|
p->blockWaitList = NULL;
|
|
p->bufWaitList = NULL;
|
|
} else
|
|
if (p) { /* we didn't create, but we want to specify
|
|
* some new status */
|
|
p->flags |= flags; /* add in whatever flags we're
|
|
* specifying */
|
|
}
|
|
if (p && (flags & RF_PSS_RECON_BLOCKED)) {
|
|
p->blockCount++;/* if we're asking to block recon, bump the
|
|
* count */
|
|
Dprintf3("raid%d: Blocked recon on psid %ld. count now %d\n",
|
|
raidPtr->raidid, psID, p->blockCount);
|
|
}
|
|
return (p);
|
|
}
|
|
/* deletes an entry from the parity stripe status table. typically used
|
|
* when an entry has been allocated solely to block reconstruction, and
|
|
* no recon was requested while recon was blocked. Assumes the hash
|
|
* chain is ALREADY LOCKED.
|
|
*/
|
|
void
|
|
rf_PSStatusDelete(RF_Raid_t *raidPtr, RF_PSStatusHeader_t *pssTable,
|
|
RF_ReconParityStripeStatus_t *pssPtr)
|
|
{
|
|
RF_PSStatusHeader_t *hdr = &(pssTable[RF_HASH_PSID(raidPtr, pssPtr->parityStripeID)]);
|
|
RF_ReconParityStripeStatus_t *p = hdr->chain, *pt = NULL;
|
|
|
|
while (p) {
|
|
if (p == pssPtr) {
|
|
if (pt)
|
|
pt->next = p->next;
|
|
else
|
|
hdr->chain = p->next;
|
|
p->next = NULL;
|
|
rf_FreePSStatus(raidPtr, p);
|
|
return;
|
|
}
|
|
pt = p;
|
|
p = p->next;
|
|
}
|
|
RF_ASSERT(0); /* we must find it here */
|
|
}
|
|
/* deletes an entry from the ps status table after reconstruction has completed */
|
|
void
|
|
rf_RemoveFromActiveReconTable(RF_Raid_t *raidPtr, RF_StripeNum_t psid,
|
|
RF_ReconUnitNum_t which_ru)
|
|
{
|
|
RF_PSStatusHeader_t *hdr = &(raidPtr->reconControl->pssTable[RF_HASH_PSID(raidPtr, psid)]);
|
|
RF_ReconParityStripeStatus_t *p, *pt;
|
|
RF_CallbackDesc_t *cb, *cb1;
|
|
|
|
rf_lock_mutex2(hdr->mutex);
|
|
while(hdr->lock) {
|
|
rf_wait_cond2(hdr->cond, hdr->mutex);
|
|
}
|
|
hdr->lock = 1;
|
|
rf_unlock_mutex2(hdr->mutex);
|
|
for (pt = NULL, p = hdr->chain; p; pt = p, p = p->next) {
|
|
if ((p->parityStripeID == psid) && (p->which_ru == which_ru))
|
|
break;
|
|
}
|
|
if (p == NULL) {
|
|
rf_PrintPSStatusTable(raidPtr);
|
|
}
|
|
RF_ASSERT(p); /* it must be there */
|
|
|
|
Dprintf2("PSS: deleting pss for psid %ld ru %d\n", psid, which_ru);
|
|
|
|
/* delete this entry from the hash chain */
|
|
if (pt)
|
|
pt->next = p->next;
|
|
else
|
|
hdr->chain = p->next;
|
|
p->next = NULL;
|
|
|
|
rf_lock_mutex2(hdr->mutex);
|
|
hdr->lock = 0;
|
|
rf_unlock_mutex2(hdr->mutex);
|
|
|
|
/* wakup anyone waiting on the parity stripe ID */
|
|
cb = p->procWaitList;
|
|
p->procWaitList = NULL;
|
|
while (cb) {
|
|
Dprintf1("Waking up access waiting on parity stripe ID %ld\n", p->parityStripeID);
|
|
cb1 = cb->next;
|
|
(cb->callbackFunc) (cb->callbackArg);
|
|
rf_FreeCallbackDesc(cb);
|
|
cb = cb1;
|
|
}
|
|
|
|
rf_FreePSStatus(raidPtr, p);
|
|
}
|
|
|
|
RF_ReconParityStripeStatus_t *
|
|
rf_AllocPSStatus(RF_Raid_t *raidPtr)
|
|
{
|
|
RF_ReconParityStripeStatus_t *p;
|
|
|
|
p = pool_get(&rf_pools.pss, PR_WAITOK);
|
|
memset(p, 0, sizeof(RF_ReconParityStripeStatus_t));
|
|
return (p);
|
|
}
|
|
|
|
void
|
|
rf_FreePSStatus(RF_Raid_t *raidPtr, RF_ReconParityStripeStatus_t *p)
|
|
{
|
|
RF_ASSERT(p->procWaitList == NULL);
|
|
RF_ASSERT(p->blockWaitList == NULL);
|
|
RF_ASSERT(p->bufWaitList == NULL);
|
|
|
|
pool_put(&rf_pools.pss, p);
|
|
}
|
|
|
|
static void
|
|
RealPrintPSStatusTable(RF_Raid_t *raidPtr, RF_PSStatusHeader_t *pssTable)
|
|
{
|
|
int i, j, procsWaiting, blocksWaiting, bufsWaiting;
|
|
RF_ReconParityStripeStatus_t *p;
|
|
RF_CallbackDesc_t *cb;
|
|
|
|
printf("\nParity Stripe Status Table\n");
|
|
for (i = 0; i < raidPtr->pssTableSize; i++) {
|
|
for (p = pssTable[i].chain; p; p = p->next) {
|
|
procsWaiting = blocksWaiting = bufsWaiting = 0;
|
|
for (cb = p->procWaitList; cb; cb = cb->next)
|
|
procsWaiting++;
|
|
for (cb = p->blockWaitList; cb; cb = cb->next)
|
|
blocksWaiting++;
|
|
for (cb = p->bufWaitList; cb; cb = cb->next)
|
|
bufsWaiting++;
|
|
printf("PSID %ld RU %d : blockCount %d %d/%d/%d proc/block/buf waiting, issued ",
|
|
(long) p->parityStripeID, p->which_ru, p->blockCount, procsWaiting, blocksWaiting, bufsWaiting);
|
|
for (j = 0; j < raidPtr->numCol; j++)
|
|
printf("%c", (p->issued[j]) ? '1' : '0');
|
|
if (!p->flags)
|
|
printf(" flags: (none)");
|
|
else {
|
|
if (p->flags & RF_PSS_UNDER_RECON)
|
|
printf(" under-recon");
|
|
if (p->flags & RF_PSS_FORCED_ON_WRITE)
|
|
printf(" forced-w");
|
|
if (p->flags & RF_PSS_FORCED_ON_READ)
|
|
printf(" forced-r");
|
|
if (p->flags & RF_PSS_RECON_BLOCKED)
|
|
printf(" blocked");
|
|
if (p->flags & RF_PSS_BUFFERWAIT)
|
|
printf(" bufwait");
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
rf_PrintPSStatusTable(RF_Raid_t *raidPtr)
|
|
{
|
|
RF_PSStatusHeader_t *pssTable = raidPtr->reconControl->pssTable;
|
|
RealPrintPSStatusTable(raidPtr, pssTable);
|
|
}
|