void
connManager() {
time_t curTime;
iFuseConn_t *tmpIFuseConn;
ListNode *node;
List *TimeOutList = newListNoRegion();
while ( 1 ) {
curTime = time( NULL );
/* exceed high water mark for number of connection ? */
if ( listSize( ConnectedConn ) > HIGH_NUM_CONN ) {
LOCK_STRUCT( *ConnectedConn );
int disconnTarget = _listSize( ConnectedConn ) - HIGH_NUM_CONN;
node = ConnectedConn->list->head;
while ( node != NULL ) {
tmpIFuseConn = ( iFuseConn_t * ) node->value;
if ( tmpIFuseConn->inuseCnt == 0 && tmpIFuseConn->pendingCnt == 0 && curTime - tmpIFuseConn->actTime > IFUSE_CONN_TIMEOUT ) {
listAppendNoRegion( TimeOutList, tmpIFuseConn );
}
node = node->next;
}
UNLOCK_STRUCT( *ConnectedConn );
node = TimeOutList->head;
int disconned = 0;
while ( node != NULL && disconned < disconnTarget ) {
tmpIFuseConn = ( iFuseConn_t * ) node->value;
LOCK_STRUCT( *tmpIFuseConn );
if ( tmpIFuseConn->inuseCnt == 0 && tmpIFuseConn->pendingCnt == 0 && curTime - tmpIFuseConn->actTime > IFUSE_CONN_TIMEOUT ) {
removeFromConcurrentList2( FreeConn, tmpIFuseConn );
removeFromConcurrentList2( ConnectedConn, tmpIFuseConn );
if ( tmpIFuseConn->status == 0 ) { /* no struct is referring to it, we can unlock it and free it */
UNLOCK_STRUCT( *tmpIFuseConn );
/* rodsLog(LOG_ERROR, "[FREE IFUSE CONN] %s:%d %p", __FILE__, __LINE__, tmpIFuseConn); */
_freeIFuseConn( tmpIFuseConn );
}
else { /* set to timed out */
_ifuseDisconnect( tmpIFuseConn );
UNLOCK_STRUCT( *tmpIFuseConn );
}
disconned ++;
}
else {
UNLOCK_STRUCT( *tmpIFuseConn );
}
node = node->next;
}
clearListNoRegion( TimeOutList );
}
notifyWait( &connReqWait.mutex, &connReqWait.cond );
timeoutWait( &ConnManagerLock, &ConnManagerCond, CONN_MANAGER_SLEEP_TIME );
}
deleteListNoRegion( TimeOutList );
}
int _getAndUseIFuseConn( iFuseConn_t **iFuseConn ) {
int status;
iFuseConn_t *tmpIFuseConn;
*iFuseConn = NULL;
LOCK( WaitForConnLock );
while ( listSize( ConnectedConn ) >= MAX_NUM_CONN && listSize( FreeConn ) == 0 ) {
untimedWait( &connReqWait.mutex, &connReqWait.cond );
}
tmpIFuseConn = ( iFuseConn_t * ) removeFirstElementOfConcurrentList( FreeConn );
if ( tmpIFuseConn == NULL ) {
if ( listSize( ConnectedConn ) < MAX_NUM_CONN ) {
tmpIFuseConn = newIFuseConn( &status );
if ( status < 0 ) {
_freeIFuseConn( tmpIFuseConn );
return status;
}
_useFreeIFuseConn( tmpIFuseConn );
addToConcurrentList( ConnectedConn, tmpIFuseConn );
*iFuseConn = tmpIFuseConn;
}
else {
rodsLog( LOG_ERROR, "failure to acquire fuse connection; maximum fuse connections exceeded." );
return SYS_MAX_CONNECT_COUNT_EXCEEDED;
}
}
else {
useIFuseConn( tmpIFuseConn );
*iFuseConn = tmpIFuseConn;
}
UNLOCK( WaitForConnLock );
if ( ++ConnManagerStarted == HIGH_NUM_CONN ) {
/* don't do it the first time */
#ifdef USE_BOOST
ConnManagerThr = new boost::thread( connManager );
#else
status = pthread_create( &ConnManagerThr, pthread_attr_default, ( void * ( * )( void * ) ) connManager, ( void * ) NULL );
#endif
if ( status < 0 ) {
ConnManagerStarted--;
rodsLog( LOG_ERROR, "pthread_create failure, status = %d", status );
}
}
return 0;
}
void
connManager() {
time_t curTime;
iFuseConn_t *tmpIFuseConn;
ListNode *node;
List *TimeOutList = newListNoRegion();
while ( 1 ) {
curTime = time( NULL );
/* exceed high water mark for number of connection ? */
if ( listSize( ConnectedConn ) > HIGH_NUM_CONN ) {
LOCK_STRUCT( *ConnectedConn );
int disconnTarget = _listSize( ConnectedConn ) - HIGH_NUM_CONN;
node = ConnectedConn->list->head;
while ( node != NULL ) {
tmpIFuseConn = ( iFuseConn_t * ) node->value;
if ( tmpIFuseConn->inuseCnt == 0 && tmpIFuseConn->pendingCnt == 0 && curTime - tmpIFuseConn->actTime > IFUSE_CONN_TIMEOUT ) {
listAppendNoRegion( TimeOutList, tmpIFuseConn );
}
node = node->next;
}
UNLOCK_STRUCT( *ConnectedConn );
node = TimeOutList->head;
int disconned = 0;
while ( node != NULL && disconned < disconnTarget ) {
tmpIFuseConn = ( iFuseConn_t * ) node->value;
LOCK_STRUCT( *tmpIFuseConn );
if ( tmpIFuseConn->inuseCnt == 0 && tmpIFuseConn->pendingCnt == 0 && curTime - tmpIFuseConn->actTime > IFUSE_CONN_TIMEOUT ) {
removeFromConcurrentList2( FreeConn, tmpIFuseConn );
removeFromConcurrentList2( ConnectedConn, tmpIFuseConn );
if ( tmpIFuseConn->status == 0 ) { /* no struct is referring to it, we can unlock it and free it */
UNLOCK_STRUCT( *tmpIFuseConn );
/* rodsLog(LOG_ERROR, "[FREE IFUSE CONN] %s:%d %p", __FILE__, __LINE__, tmpIFuseConn); */
_freeIFuseConn( tmpIFuseConn );
}
else { /* set to timed out */
_ifuseDisconnect( tmpIFuseConn );
UNLOCK_STRUCT( *tmpIFuseConn );
}
disconned ++;
}
else {
UNLOCK_STRUCT( *tmpIFuseConn );
}
node = node->next;
}
clearListNoRegion( TimeOutList );
}
while ( listSize( ConnectedConn ) <= MAX_NUM_CONN || listSize( FreeConn ) != 0 ) {
/* signal one in the wait queue */
connReqWait_t *myConnReqWait = ( connReqWait_t * ) removeFirstElementOfConcurrentList( ConnReqWaitQue );
/* if there is no conn req left, exit loop */
if ( myConnReqWait == NULL ) {
break;
}
myConnReqWait->state = 1;
notifyTimeoutWait( &myConnReqWait->mutex, &myConnReqWait->cond );
}
#if 0
rodsSleep( CONN_MANAGER_SLEEP_TIME, 0 );
#else
timeoutWait( &ConnManagerLock, &ConnManagerCond, CONN_MANAGER_SLEEP_TIME );
#endif
}
deleteListNoRegion( TimeOutList );
}
int _getAndUseIFuseConn( iFuseConn_t **iFuseConn ) {
int status;
iFuseConn_t *tmpIFuseConn;
*iFuseConn = NULL;
while ( *iFuseConn == NULL ) {
/* get a free IFuseConn */
if ( listSize( ConnectedConn ) >= MAX_NUM_CONN && listSize( FreeConn ) == 0 ) {
/* have to wait */
_waitForConn();
/* start from begining */
continue;
}
else {
tmpIFuseConn = ( iFuseConn_t * ) removeFirstElementOfConcurrentList( FreeConn );
if ( tmpIFuseConn == NULL ) {
if ( listSize( ConnectedConn ) < MAX_NUM_CONN ) {
/* may cause num of conn > max num of conn */
/* get here when nothing free. make one */
tmpIFuseConn = newIFuseConn( &status );
if ( status < 0 ) {
_freeIFuseConn( tmpIFuseConn );
return status;
}
_useFreeIFuseConn( tmpIFuseConn );
addToConcurrentList( ConnectedConn, tmpIFuseConn );
*iFuseConn = tmpIFuseConn;
break;
}
_waitForConn();
continue;
}
else {
useIFuseConn( tmpIFuseConn );
*iFuseConn = tmpIFuseConn;
break;
}
}
} /* while *iFuseConn */
if ( ++ConnManagerStarted == HIGH_NUM_CONN ) {
/* don't do it the first time */
#ifdef USE_BOOST
ConnManagerThr = new boost::thread( connManager );
#else
status = pthread_create( &ConnManagerThr, pthread_attr_default, ( void * ( * )( void * ) ) connManager, ( void * ) NULL );
#endif
if ( status < 0 ) {
ConnManagerStarted--;
rodsLog( LOG_ERROR, "pthread_create failure, status = %d", status );
}
}
return 0;
}
