/* precond: lock desc */
int _freeIFuseDesc (iFuseDesc_t *desc)
{
int i;
if (desc->index < 3) {
rodsLog (LOG_ERROR,
"freeIFuseDesc: descInx %d out of range", desc->index);
return (SYS_FILE_DESC_OUT_OF_RANGE);
}
for (i = 0; i < MAX_BUF_CACHE; i++) {
if (desc->bufCache[i].buf != NULL) {
free (desc->bufCache[i].buf);
}
}
free (desc->objPath);
free (desc->localPath);
UNREF(desc->fileCache, FileCache);
addToConcurrentList(IFuseDescFreeList, desc);
/*
printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
printf("num of desc slots free = %d\n", listSize(IFuseDescFreeList));
printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");*/
return 0;
}
void _waitForConn() {
connReqWait_t myConnReqWait;
bzero( &myConnReqWait, sizeof( myConnReqWait ) );
initConnReqWaitMutex( &myConnReqWait );
addToConcurrentList( ConnReqWaitQue, &myConnReqWait );
while ( myConnReqWait.state == 0 ) {
timeoutWait( &myConnReqWait.mutex, &myConnReqWait.cond, CONN_REQ_SLEEP_TIME );
}
deleteConnReqWaitMutex( &myConnReqWait );
}
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;
}
int
unuseIFuseConn( iFuseConn_t *iFuseConn ) {
if ( iFuseConn == NULL || iFuseConn->conn == NULL ) {
return USER__NULL_INPUT_ERR;
}
LOCK_STRUCT( *iFuseConn );
iFuseConn->actTime = time( NULL );
iFuseConn->inuseCnt--;
if ( iFuseConn->pendingCnt == 0 ) {
addToConcurrentList( FreeConn, iFuseConn );
}
UNLOCK_STRUCT( *iFuseConn );
signalConnManager();
return 0;
}
int
initIFuseDesc ()
{
#ifndef USE_BOOST
pthread_mutex_init (&PathCacheLock, NULL);
pthread_mutex_init (&ConnManagerLock, NULL);
pthread_cond_init (&ConnManagerCond, NULL);
IFuseDescFreeList = newConcurrentList();
int i;
for(i=0;i<MAX_IFUSE_DESC;i++) {
INIT_STRUCT_LOCK(IFuseDesc[i]);
IFuseDesc[i].index = i;
if(i>=3) {
addToConcurrentList(IFuseDescFreeList, &IFuseDesc[i]);
}
}
#endif
// JMC - overwrites objects construction? - memset (IFuseDesc, 0, sizeof (iFuseDesc_t) * MAX_IFUSE_DESC);
return (0);
}
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;
}
int
preloadFile (const char *path, struct stat *stbuf) {
int status;
preloadThreadInfo_t *existingThreadInfo = NULL;
preloadThreadInfo_t *threadInfo = NULL;
preloadThreadData_t *threadData = NULL;
char iRODSPath[MAX_NAME_LEN];
off_t cacheSize;
off_t freeSize;
// convert input path to iRODSPath
status = _getiRODSPath(path, iRODSPath);
if(status < 0) {
rodsLog (LOG_DEBUG, "preloadFile: failed to get iRODS path - %s", path);
return status;
}
LOCK(PreloadLock);
// check the given file is preloading
existingThreadInfo = (preloadThreadInfo_t *)lookupFromHashTable(PreloadThreadTable, iRODSPath);
if(existingThreadInfo != NULL) {
rodsLog (LOG_DEBUG, "preloadFile: preloading is already running - %s", iRODSPath);
UNLOCK(PreloadLock);
return 0;
}
if(_hasValidCache(iRODSPath, stbuf) != 0) {
// invalidate cache - this may fail if cache file does not exists
// if old cache exists in local, invalidate it
_invalidateCache(iRODSPath);
if(stbuf->st_size < PreloadConfig.preloadMinSize) {
rodsLog (LOG_DEBUG, "preloadFile: given file is smaller than preloadMinSize, canceling preloading - %s", iRODSPath);
UNLOCK(PreloadLock);
return (0);
}
// check whether preload cache exceeds limit
if(PreloadConfig.cacheMaxSize > 0) {
// cache max size is set
if(stbuf->st_size > (off_t)PreloadConfig.cacheMaxSize) {
rodsLog (LOG_DEBUG, "preloadFile: given file is bigger than cacheMaxSize, canceling preloading - %s", iRODSPath);
UNLOCK(PreloadLock);
return (0);
}
cacheSize = getFileSizeRecursive(PreloadConfig.cachePath);
if((cacheSize + stbuf->st_size) > (off_t)PreloadConfig.cacheMaxSize) {
// evict?
status = _evictOldCache((cacheSize + stbuf->st_size) - (off_t)PreloadConfig.cacheMaxSize);
if(status < 0) {
rodsLog (LOG_DEBUG, "preloadFile: failed to evict old cache");
UNLOCK(PreloadLock);
return status;
}
}
}
freeSize = getEmptypSpace(PreloadConfig.cachePath);
if(freeSize < stbuf->st_size) {
// evict?
status = _evictOldCache(stbuf->st_size - freeSize);
if(status < 0) {
rodsLog (LOG_DEBUG, "preloadFile: failed to evict old cache");
UNLOCK(PreloadLock);
return status;
}
}
// does not have valid cache. now, start a new preloading
// create a new thread to preload
threadInfo = (preloadThreadInfo_t *)malloc(sizeof(preloadThreadInfo_t));
threadInfo->path = strdup(iRODSPath);
threadInfo->running = PRELOAD_THREAD_RUNNING;
INIT_STRUCT_LOCK((*threadInfo));
addToConcurrentList(PreloadThreadList, threadInfo);
insertIntoHashTable(PreloadThreadTable, iRODSPath, threadInfo);
// prepare thread argument
threadData = (preloadThreadData_t *)malloc(sizeof(preloadThreadData_t));
threadData->path = strdup(iRODSPath);
memcpy(&threadData->stbuf, stbuf, sizeof(struct stat));
threadData->threadInfo = threadInfo;
rodsLog (LOG_DEBUG, "preloadFile: start preloading - %s", iRODSPath);
#ifdef USE_BOOST
status = threadInfo->thread = new boost::thread(_preloadThread, (void *)threadData);
#else
status = pthread_create(&threadInfo->thread, NULL, _preloadThread, (void *)threadData);
#endif
} else {
rodsLog (LOG_DEBUG, "preloadFile: given file is already preloaded - %s", iRODSPath);
status = 0;
}
UNLOCK(PreloadLock);
return status;
}