/* $OpenBSD: rf_psstatus.c,v 1.1 1999/01/11 14:29:40 niklas Exp $ */ /* $NetBSD: rf_psstatus.c,v 1.1 1998/11/13 04:20:32 oster 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. * *****************************************************************************/ /* : * Log: rf_psstatus.c,v * Revision 1.29 1996/07/27 23:36:08 jimz * Solaris port of simulator * * Revision 1.28 1996/07/15 17:22:18 jimz * nit-pick code cleanup * resolve stdlib problems on DEC OSF * * Revision 1.27 1996/07/13 00:00:59 jimz * sanitized generalized reconstruction architecture * cleaned up head sep, rbuf problems * * Revision 1.26 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 1.25 1996/06/07 22:26:27 jimz * type-ify which_ru (RF_ReconUnitNum_t) * * Revision 1.24 1996/06/07 21:33:04 jimz * begin using consistent types for sector numbers, * stripe numbers, row+col numbers, recon unit numbers * * Revision 1.23 1996/06/05 18:06:02 jimz * Major code cleanup. The Great Renaming is now done. * Better modularity. Better typing. Fixed a bunch of * synchronization bugs. Made a lot of global stuff * per-desc or per-array. Removed dead code. * * Revision 1.22 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 1.21 1996/05/30 23:22:16 jimz * bugfixes of serialization, timing problems * more cleanup * * Revision 1.20 1996/05/27 18:56:37 jimz * more code cleanup * better typing * compiles in all 3 environments * * Revision 1.19 1996/05/24 22:17:04 jimz * continue code + namespace cleanup * typed a bunch of flags * * Revision 1.18 1996/05/23 21:46:35 jimz * checkpoint in code cleanup (release prep) * lots of types, function names have been fixed * * Revision 1.17 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 1.16 1996/05/20 16:15:27 jimz * switch to rf_{mutex,cond}_{init,destroy} * * Revision 1.15 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 1.14 1995/12/12 18:10:06 jimz * MIN -> RF_MIN, MAX -> RF_MAX, ASSERT -> RF_ASSERT * fix 80-column brain damage in comments * * Revision 1.13 1995/11/30 16:17:18 wvcii * added copyright info * */ #include "rf_types.h" #include "rf_raid.h" #include "rf_threadid.h" #include "rf_general.h" #include "rf_debugprint.h" #include "rf_freelist.h" #include "rf_psstatus.h" #include "rf_shutdown.h" #include "rf_sys.h" #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) static void RealPrintPSStatusTable(RF_Raid_t *raidPtr, RF_PSStatusHeader_t *pssTable); #define RF_MAX_FREE_PSS 32 #define RF_PSS_INC 8 #define RF_PSS_INITIAL 4 static int init_pss( RF_ReconParityStripeStatus_t *, RF_Raid_t *); static void clean_pss(RF_ReconParityStripeStatus_t *, RF_Raid_t *); static void rf_ShutdownPSStatus(void *); static int init_pss(p, raidPtr) RF_ReconParityStripeStatus_t *p; RF_Raid_t *raidPtr; { RF_Calloc(p->issued, raidPtr->numCol, sizeof(char), (char *)); if (p->issued == NULL) return(ENOMEM); return(0); } static void clean_pss(p, raidPtr) RF_ReconParityStripeStatus_t *p; RF_Raid_t *raidPtr; { RF_Free(p->issued, raidPtr->numCol*sizeof(char)); } static void rf_ShutdownPSStatus(arg) void *arg; { RF_Raid_t *raidPtr = (RF_Raid_t *)arg; RF_FREELIST_DESTROY_CLEAN_ARG(raidPtr->pss_freelist,next,(RF_ReconParityStripeStatus_t *),clean_pss,raidPtr); } int rf_ConfigurePSStatus( RF_ShutdownList_t **listp, RF_Raid_t *raidPtr, RF_Config_t *cfgPtr) { int rc; raidPtr->pssTableSize = RF_PSS_DEFAULT_TABLESIZE; RF_FREELIST_CREATE(raidPtr->pss_freelist, RF_MAX_FREE_PSS, RF_PSS_INC, sizeof(RF_ReconParityStripeStatus_t)); if (raidPtr->pss_freelist == NULL) return(ENOMEM); rc = rf_ShutdownCreate(listp, rf_ShutdownPSStatus, raidPtr); if (rc) { RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__, __LINE__, rc); rf_ShutdownPSStatus(raidPtr); return(rc); } RF_FREELIST_PRIME_INIT_ARG(raidPtr->pss_freelist, RF_PSS_INITIAL,next, (RF_ReconParityStripeStatus_t *),init_pss,raidPtr); return(0); } /***************************************************************************************** * 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(raidPtr) RF_Raid_t *raidPtr; { RF_PSStatusHeader_t *pssTable; int i, j, rc; RF_Calloc(pssTable, raidPtr->pssTableSize, sizeof(RF_PSStatusHeader_t), (RF_PSStatusHeader_t *)); for (i=0; ipssTableSize; i++) { rc = rf_mutex_init(&pssTable[i].mutex); if (rc) { RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, __LINE__, rc); /* fail and deallocate */ for(j=0;jpssTableSize*sizeof(RF_PSStatusHeader_t)); return(NULL); } } return(pssTable); } void rf_FreeParityStripeStatusTable(raidPtr, pssTable) RF_Raid_t *raidPtr; RF_PSStatusHeader_t *pssTable; { int i; if (rf_pssDebug) RealPrintPSStatusTable(raidPtr, pssTable); for (i=0; ipssTableSize; i++) { if (pssTable[i].chain) { printf("ERROR: pss hash chain not null at recon shutdown\n"); } rf_mutex_destroy(&pssTable[i].mutex); } RF_Free(pssTable, raidPtr->pssTableSize * sizeof(RF_PSStatusHeader_t)); } /* looks up the status structure for a parity stripe. * if the create_flag is on, creates and returns the status structure it it doesn't exist * otherwise returns NULL if the status structure does not exist * * ASSUMES THE PSS DESCRIPTOR IS LOCKED UPON ENTRY */ 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, /* whether or not to create it if it doesn't exist + what flags to set initially */ int *created) { RF_PSStatusHeader_t *hdr = &pssTable[ RF_HASH_PSID(raidPtr,psID) ]; RF_ReconParityStripeStatus_t *p, *pssPtr = hdr->chain; *created = 0; for (p = pssPtr; p; p=p->next) { if (p->parityStripeID == psID && p->which_ru == which_ru) break; } if (!p && (flags&RF_PSS_CREATE)) { Dprintf2("PSS: creating pss for psid %ld ru %d\n",psID,which_ru); p = rf_AllocPSStatus(raidPtr); 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->blockCount = 0; p->procWaitList = NULL; p->blockWaitList = NULL; p->bufWaitList = NULL; *created = 1; } 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)) { int tid; rf_get_threadid(tid); p->blockCount++; /* if we're asking to block recon, bump the count */ Dprintf3("[%d] Blocked recon on psid %ld. count now %d\n",tid,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(raidPtr, pssTable, pssPtr) 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(raidPtr, row, psid, which_ru) RF_Raid_t *raidPtr; RF_RowCol_t row; RF_ReconUnitNum_t which_ru; RF_StripeNum_t psid; { RF_PSStatusHeader_t *hdr = &(raidPtr->reconControl[row]->pssTable[ RF_HASH_PSID(raidPtr,psid) ]); RF_ReconParityStripeStatus_t *p, *pt; RF_CallbackDesc_t *cb, *cb1; RF_LOCK_MUTEX( 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, row); } 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_UNLOCK_MUTEX( 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); /* THIS IS WHAT THE ORIGINAL CODE HAD... the extra 0 is bogus, IMHO */ /* (cb->callbackFunc)(cb->callbackArg, 0); */ rf_FreeCallbackDesc(cb); cb = cb1; } rf_FreePSStatus(raidPtr, p); } RF_ReconParityStripeStatus_t *rf_AllocPSStatus(raidPtr) RF_Raid_t *raidPtr; { RF_ReconParityStripeStatus_t *p; RF_FREELIST_GET_INIT_ARG(raidPtr->pss_freelist,p,next,(RF_ReconParityStripeStatus_t *),init_pss,raidPtr); if (p) { bzero(p->issued, raidPtr->numCol); } p->next = NULL; /* no need to initialize here b/c the only place we're called from is the above Lookup */ return(p); } void rf_FreePSStatus(raidPtr, p) RF_Raid_t *raidPtr; RF_ReconParityStripeStatus_t *p; { RF_ASSERT(p->procWaitList == NULL); RF_ASSERT(p->blockWaitList == NULL); RF_ASSERT(p->bufWaitList == NULL); RF_FREELIST_FREE_CLEAN_ARG(raidPtr->pss_freelist,p,next,clean_pss,raidPtr); } static void RealPrintPSStatusTable(raidPtr, pssTable) 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;jnumCol; 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(raidPtr, row) RF_Raid_t *raidPtr; RF_RowCol_t row; { RF_PSStatusHeader_t *pssTable = raidPtr->reconControl[row]->pssTable; RealPrintPSStatusTable(raidPtr, pssTable); }