Esempio n. 1
0
File: bpclock.c Progetto: b/ION
static void	applyRateControl(Sdr sdr)
{
	BpVdb		*vdb = getBpVdb();
	PsmPartition	ionwm = getIonwm();
	Throttle	*throttle;
	PsmAddress	elt;
	VInduct		*induct;
	VOutduct	*outduct;
	long		capacityLimit;

	sdr_begin_xn(sdr);	/*	Just to lock memory.		*/

	/*	Recalculate limit on local bundle generation.		*/

	manageProductionThrottle(vdb);

	/*	Enable some bundle acquisition.				*/

	for (elt = sm_list_first(ionwm, vdb->inducts); elt;
			elt = sm_list_next(ionwm, elt))
	{
		induct = (VInduct *) psp(ionwm, sm_list_data(ionwm, elt));
		throttle = &(induct->acqThrottle);
		capacityLimit = throttle->nominalRate << 1;
		throttle->capacity += throttle->nominalRate;
		if (throttle->capacity > capacityLimit)
		{
			throttle->capacity = capacityLimit;
		}

		if (throttle->capacity > 0)
		{
			sm_SemGive(throttle->semaphore);
		}
	}

	/*	Enable some bundle transmission.			*/

	for (elt = sm_list_first(ionwm, vdb->outducts); elt;
			elt = sm_list_next(ionwm, elt))
	{
		outduct = (VOutduct *) psp(ionwm, sm_list_data(ionwm, elt));
		throttle = &(outduct->xmitThrottle);
		capacityLimit = throttle->nominalRate << 1;
		throttle->capacity += throttle->nominalRate;
		if (throttle->capacity > capacityLimit)
		{
			throttle->capacity = capacityLimit;
		}

		if (throttle->capacity > 0)
		{
			sm_SemGive(throttle->semaphore);
		}
	}

	sdr_exit_xn(sdr);	/*	Unlock memory.			*/
}
Esempio n. 2
0
File: libbp.c Progetto: b/ION
static void	*timerMain(void *parm)
{
	TimerParms	*timer = (TimerParms *) parm;
	pthread_mutex_t	mutex;
	pthread_cond_t	cv;
	struct timeval	workTime;
	struct timespec	deadline;
	int		result;

	memset((char *) &mutex, 0, sizeof mutex);
	if (pthread_mutex_init(&mutex, NULL))
	{
		putSysErrmsg("can't start timer, mutex init failed", NULL);
		sm_SemGive(timer->semaphore);
		return NULL;
	}

	memset((char *) &cv, 0, sizeof cv);
	if (pthread_cond_init(&cv, NULL))
	{
		putSysErrmsg("can't start timer, cond init failed", NULL);
		sm_SemGive(timer->semaphore);
		return NULL;
	}

	getCurrentTime(&workTime);
	deadline.tv_sec = workTime.tv_sec + timer->interval;
	deadline.tv_nsec = workTime.tv_usec * 1000;
	pthread_mutex_lock(&mutex);
	result = pthread_cond_timedwait(&cv, &mutex, &deadline);
	pthread_mutex_unlock(&mutex);
	pthread_mutex_destroy(&mutex);
	pthread_cond_destroy(&cv);
	if (result)
	{
		errno = result;
		if (errno != ETIMEDOUT)
		{
			putSysErrmsg("timer failure", NULL);
			sm_SemGive(timer->semaphore);
			return NULL;
		}
	}

	/*	Timed out; must wake up the main thread.		*/

	timer->interval = 0;	/*	Indicate genuine timeout.	*/
	sm_SemGive(timer->semaphore);
	return NULL;
}
Esempio n. 3
0
File: libbp.c Progetto: b/ION
void	bp_interrupt(BpSAP sap)
{
	/*	Give semaphore, simulating reception notice.		*/

	if (sap != NULL && sap->recvSemaphore != SM_SEM_NONE)
	{
		sm_SemGive(sap->recvSemaphore);
	}
}
Esempio n. 4
0
static void	ionReleaseZcoSpace(IonVdb *vdb)
{
	/*	If there are any remaining claims then let the
	 *	next claimant in the queue (possibly this claimant,
	 *	now re-appended to semaphore's FIFO) take a shot.	*/

	if (vdb->zcoClaims > 0)
	{
		oK(sm_SemGive(vdb->zcoSemaphore));
	}
}
Esempio n. 5
0
static void	unlockPartition(PartitionMap *map)
{
	if (map->status == MANAGED
	&& map->ownerTask == sm_TaskIdSelf()
	&& pthread_equal(map->ownerThread, pthread_self()))
	{
		map->depth--;
		if (map->depth == 0)
		{
			map->ownerTask = -1;
			if (map->semaphore != -1)
			{
				sm_SemGive(map->semaphore);
			}
		}
	}
}
Esempio n. 6
0
static void	ionOfferZcoSpace()
{
	IonVdb	*vdb = _ionvdb(NULL);

	if (vdb)
	{
		/*	Give all tasks currently waiting for ZCO
		 *	space a shot at claiming the space that
		 *	has now been made available.			*/

		vdb->zcoClaims += vdb->zcoClaimants;
		vdb->zcoClaimants = 0;
		if (vdb->zcoClaims > 0)
		{
			sm_SemGive(vdb->zcoSemaphore);
		}
	}
}
Esempio n. 7
0
File: ltpclock.c Progetto: b/ION
static int	manageLinks(Sdr sdr, time_t currentTime)
{
	PsmPartition	ionwm = getIonwm();
	LtpVdb		*ltpvdb = getLtpVdb();
	IonVdb		*ionvdb = getIonVdb();
	PsmAddress	elt;
	LtpVspan	*vspan;
	Object		obj;
	LtpSpan		span;
	IonNeighbor	*neighbor;
	PsmAddress	nextElt;
	unsigned long	priorXmitRate;

	sdr_begin_xn(sdr);
	for (elt = sm_list_first(ionwm, ltpvdb->spans); elt;
			elt = sm_list_next(ionwm, elt))
	{
		vspan = (LtpVspan *) psp(ionwm, sm_list_data(ionwm, elt));

		/*	Finish aggregation as necessary.		*/

		obj = sdr_list_data(sdr, vspan->spanElt);
		sdr_stage(sdr, (char *) &span, obj, sizeof(LtpSpan));
		if (span.lengthOfBufferedBlock > 0)
		{
			span.ageOfBufferedBlock++;
			sdr_write(sdr, obj, (char *) &span, sizeof(LtpSpan));
			if (span.ageOfBufferedBlock >= span.aggrTimeLimit)
			{
				sm_SemGive(vspan->bufFullSemaphore);
			}
		}

		/*	Find Neighbor object encapsulating the current
		 *	known state of this LTP engine.			*/

		neighbor = findNeighbor(ionvdb, vspan->engineId, &nextElt);
		if (neighbor == NULL)
		{
			neighbor = addNeighbor(ionvdb, vspan->engineId,
					nextElt);
			if (neighbor == NULL)
			{
				putErrmsg("Can't update span.", NULL);
				return -1;
			}
		}

		if (neighbor->xmitRate == 0)
		{
			if (vspan->localXmitRate > 0)
			{
				vspan->localXmitRate = 0;
				ltpStopXmit(vspan);
			}
		}
		else
		{
			if (vspan->localXmitRate == 0)
			{
				vspan->localXmitRate = neighbor->xmitRate;
				ltpStartXmit(vspan);
			}
		}

		if (neighbor->fireRate == 0)
		{
			if (vspan->remoteXmitRate > 0)
			{
				priorXmitRate = vspan->remoteXmitRate;
				vspan->remoteXmitRate = 0;
				if (ltpSuspendTimers(vspan, elt, currentTime,
						priorXmitRate))
				{
					putErrmsg("Can't manage links.", NULL);
					return -1;
				}
			}
		}
		else
		{
			if (vspan->remoteXmitRate == 0)
			{
				vspan->remoteXmitRate = neighbor->fireRate;
				if (ltpResumeTimers(vspan, elt, currentTime,
						vspan->remoteXmitRate))
				{
					putErrmsg("Can't manage links.", NULL);
					return -1;
				}
			}
		}

		if (neighbor->recvRate == 0)
		{
			vspan->receptionRate = 0;
		}
		else
		{
			vspan->receptionRate = neighbor->recvRate;
		}

		if (neighbor->owltInbound != vspan->owltInbound)
		{
			vspan->owltInbound = neighbor->owltInbound;
		}

		if (neighbor->owltOutbound != vspan->owltOutbound)
		{
			vspan->owltOutbound = neighbor->owltOutbound;
		}
	}

	if (sdr_end_xn(sdr) < 0)
	{
		putErrmsg("ltpclock failed managing links.", NULL);
		return -1;
	}

	return 0;
}
Esempio n. 8
0
static void	unlockSmrbt(SmRbt *rbt)
{
	sm_SemGive(rbt->lock);
}
Esempio n. 9
0
static int	checkNodeListParms(IonParms *parms, char *wdName, uvast nodeNbr)
{
	char		*nodeListDir;
	sm_SemId	nodeListMutex;
	char		nodeListFileName[265];
	int		nodeListFile;
	int		lineNbr = 0;
	int		lineLen;
	char		lineBuf[256];
	uvast		lineNodeNbr;
	int		lineWmKey;
	char		lineSdrName[MAX_SDR_NAME + 1];
	char		lineWdName[256];
	int		result;

	nodeListDir = getenv("ION_NODE_LIST_DIR");
	if (nodeListDir == NULL)	/*	Single node on machine.	*/
	{
		if (parms->wmKey == 0)
		{
			parms->wmKey = ION_DEFAULT_SM_KEY;
		}

		if (parms->wmKey != ION_DEFAULT_SM_KEY)
		{
			putErrmsg("Config parms wmKey != default.",
					itoa(ION_DEFAULT_SM_KEY));
			return -1;
		}

		if (parms->sdrName[0] == '\0')
		{
			istrcpy(parms->sdrName, ION_DEFAULT_SDR_NAME,
					sizeof parms->sdrName);
		}

		if (strcmp(parms->sdrName, ION_DEFAULT_SDR_NAME) != 0)
		{
			putErrmsg("Config parms sdrName != default.",
					ION_DEFAULT_SDR_NAME);
			return -1;
		}

		return 0;
	}

	/*	Configured for multi-node operation.			*/

	nodeListMutex = sm_SemCreate(NODE_LIST_SEMKEY, SM_SEM_FIFO);
	if (nodeListMutex == SM_SEM_NONE
	|| sm_SemUnwedge(nodeListMutex, 3) < 0 || sm_SemTake(nodeListMutex) < 0)
	{
		putErrmsg("Can't lock node list file.", NULL);
		return -1;
	}

	isprintf(nodeListFileName, sizeof nodeListFileName, "%.255s%cion_nodes",
			nodeListDir, ION_PATH_DELIMITER);
	if (nodeNbr == 0)	/*	Just attaching.			*/
	{
		nodeListFile = iopen(nodeListFileName, O_RDONLY, 0);
	}
	else			/*	Initializing the node.		*/
	{
		nodeListFile = iopen(nodeListFileName, O_RDWR | O_CREAT, 0666);
	}

	if (nodeListFile < 0)
	{
		sm_SemGive(nodeListMutex);
		putSysErrmsg("Can't open ion_nodes file", nodeListFileName);
		writeMemo("[?] Remove ION_NODE_LIST_DIR from env?");
		return -1;
	}

	while (1)
	{
		if (igets(nodeListFile, lineBuf, sizeof lineBuf, &lineLen)
				== NULL)
		{
			if (lineLen < 0)
			{
				close(nodeListFile);
				sm_SemGive(nodeListMutex);
				putErrmsg("Failed reading ion_nodes file.",
						nodeListFileName);
				return -1;
			}

			break;		/*	End of file.		*/
		}

		lineNbr++;
		if (sscanf(lineBuf, UVAST_FIELDSPEC " %d %31s %255s",
			&lineNodeNbr, &lineWmKey, lineSdrName, lineWdName) < 4)
		{
			close(nodeListFile);
			sm_SemGive(nodeListMutex);
			putErrmsg("Syntax error at line#", itoa(lineNbr));
			writeMemoNote("[?] Repair ion_nodes file.",
					nodeListFileName);
			return -1;
		}

		if (lineNodeNbr == nodeNbr)		/*	Match.	*/
		{
			/*	lineNodeNbr can't be zero (we never
			 *	write such lines to the file), so this
			 *	must be matching non-zero node numbers.
			 *	So we are re-initializing this node.	*/

			close(nodeListFile);
			if (strcmp(lineWdName, wdName) != 0)
			{
				sm_SemGive(nodeListMutex);
				putErrmsg("CWD conflict at line#",
						itoa(lineNbr));
				writeMemoNote("[?] Repair ion_nodes file.",
						nodeListFileName);
				return -1;
			}

			if (parms->wmKey == 0)
			{
				parms->wmKey = lineWmKey;
			}

			if (parms->wmKey != lineWmKey)
			{
				sm_SemGive(nodeListMutex);
				putErrmsg("WmKey conflict at line#",
						itoa(lineNbr));
				writeMemoNote("[?] Repair ion_nodes file.",
						nodeListFileName);
				return -1;
			}

			if (parms->sdrName[0] == '\0')
			{
				istrcpy(parms->sdrName, lineSdrName,
						sizeof parms->sdrName);
			}

			if (strcmp(parms->sdrName, lineSdrName) != 0)
			{
				sm_SemGive(nodeListMutex);
				putErrmsg("SdrName conflict at line#",
						itoa(lineNbr));
				writeMemoNote("[?] Repair ion_nodes file.",
						nodeListFileName);
				return -1;
			}

			return 0;
		}

		/*	lineNodeNbr does not match nodeNbr (which may
		 *	be zero).					*/

		if (strcmp(lineWdName, wdName) == 0)	/*	Match.	*/
		{
			close(nodeListFile);
			sm_SemGive(nodeListMutex);
			if (nodeNbr == 0)	/*	Attaching.	*/
			{
				parms->wmKey = lineWmKey;
				istrcpy(parms->sdrName, lineSdrName,
						MAX_SDR_NAME + 1);
				return 0;
			}

			/*	Reinitialization conflict.		*/

			putErrmsg("NodeNbr conflict at line#", itoa(lineNbr));
			writeMemoNote("[?] Repair ion_nodes file.",
					nodeListFileName);
			return -1;
		}

		/*	Haven't found matching line yet.  Continue.	*/
	}

	/*	No matching lines in file.				*/

	if (nodeNbr == 0)	/*	Attaching to existing node.	*/
	{
		close(nodeListFile);
		sm_SemGive(nodeListMutex);
		putErrmsg("No node has been initialized in this directory.",
				wdName);
		return -1;
	}

	/*	Initializing, so append line to the nodes list file.	*/

	if (parms->wmKey == 0)
	{
		parms->wmKey = ION_DEFAULT_SM_KEY;
	}

	if (parms->sdrName[0] == '\0')
	{
		istrcpy(parms->sdrName, ION_DEFAULT_SDR_NAME,
				sizeof parms->sdrName);
	}

	isprintf(lineBuf, sizeof lineBuf, UVAST_FIELDSPEC " %d %.31s %.255s\n",
			nodeNbr, parms->wmKey, parms->sdrName, wdName);
	result = iputs(nodeListFile, lineBuf);
	close(nodeListFile);
	sm_SemGive(nodeListMutex);
	if (result < 0)
	{
		putErrmsg("Failed writing to ion_nodes file.", NULL);
		return -1;
	}

	return 0;
}
Esempio n. 10
0
static void	unlockSmlist(SmList *list)
{
	sm_SemGive(list->lock);
}