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Java file server with SMB, FTP/FTPS and NFS support, virtual filesystems, database filesystems
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/*
* Copyright (C) 2006-2010 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see {
// Debug flags
public enum Dbg {
RXDATA, // Received data
TXDATA, // Transmit data
DUMPDATA, // Dump data packets
SEARCH, // File/directory search
INFO, // Information requests
FILE, // File open/close/info
FILEIO, // File read/write
ERROR, // Errors
TIMING, // Time packet processing
DIRECTORY, // Directory commands
SESSION, // Session creation/deletion
SOCKET, // Socket handling
THREADPOOL // Thread pool
}
// Default and maximum number of search slots
private static final int DefaultSearches = 32;
private static final int MaxSearches = 256;
// Remote address and port
private InetAddress m_remAddr;
private int m_remPort;
// Session type (TCP or UDP)
private Rpc.ProtocolId m_type;
// Authentication identifier
//
// Identifies this session uniquely within the authentication type being used by the client
private Object m_authIdentifier;
// Active tree connections
private TreeConnectionHash m_connections;
// Cache of currently open files
private NetworkFileCache m_fileCache;
// Last time the session was accessed. Used to determine when to expire UDP sessions.
private long m_lastAccess;
// Active search list for this session
private SearchContext[] m_search;
private int m_searchCount;
// NFS client information
private ClientInfo m_nfsClientInfo;
// RPC processor for this session
private RpcSessionProcessor m_rpcProcessor;
// RPC packet handler for this session
private RpcPacketHandler m_pktHandler;
/**
* Create a new NFS session
*
* @param pktHandler RpcPacketHandler
* @param nfsServer NFSServer
* @param sessId int
* @param protocolType Rpc.ProtocolId
* @param remAddr SocketAddress
* @return NFSSrvSession
*/
public static NFSSrvSession createSession(RpcPacketHandler pktHandler, NFSServer nfsServer, int sessId, Rpc.ProtocolId protocolType,
SocketAddress remAddr) {
// Make sure the socket address is the expected type
if ( remAddr instanceof InetSocketAddress == false)
throw new RuntimeException( "NFS session, socket address is not an InetSocketAddress");
// Create a new NFS session
return new NFSSrvSession( sessId, nfsServer, pktHandler, (InetSocketAddress) remAddr, protocolType);
}
/**
* Class constructor
*
* @param sessId int
* @param srv NFSServer
* @param pktHandler RpcPacketHandler
* @param addr InetSocketAddress
* @param type Rpc.ProtocolId
*/
public NFSSrvSession(int sessId, NFSServer srv, RpcPacketHandler pktHandler, InetSocketAddress addr, Rpc.ProtocolId type) {
super(sessId, srv, "NFS", null, NFSSrvSession.Dbg.class);
// Save the remote address/port and type
if ( addr != null) {
// Set the remote address and port
m_remAddr = addr.getAddress();
m_remPort = addr.getPort();
// Set the remote host name
setRemoteName( addr.getHostName());
}
m_type = type;
// Save the associated packet handler
m_pktHandler = pktHandler;
// Create a unique id for the session from the remote address, port and type
StringBuilder str = new StringBuilder();
str.append(type == Rpc.ProtocolId.TCP ? "T" : "U");
str.append(m_remAddr.getHostAddress());
str.append(":");
str.append(m_remPort);
setUniqueId(str.toString());
// Initialize the last access date/time
setLastAccess(System.currentTimeMillis());
}
/**
* Class constructor
*
* @param srv NetworkServer
* @param addr InetAddress
* @param port int
* @param type Rpc.ProtocolId
*/
public NFSSrvSession(NetworkServer srv, InetAddress addr, int port, Rpc.ProtocolId type) {
super(-1, srv, "NFS", null, NFSSrvSession.Dbg.class);
// Save the remote address/port and type
m_remAddr = addr;
m_remPort = port;
m_type = type;
// Create a unique id for the session from the remote address, port and type
StringBuilder str = new StringBuilder();
str.append(type == Rpc.ProtocolId.TCP ? "T" : "U");
str.append(m_remAddr.getHostAddress());
str.append(":");
str.append(m_remPort);
setUniqueId(str.toString());
// Set the remote name
setRemoteName(m_remAddr.getHostAddress());
// Initialize the last access date/time
setLastAccess(System.currentTimeMillis());
}
/**
* Return the session type
*
* @return Rpc.ProtocolId
*/
public final Rpc.ProtocolId isType() {
return m_type;
}
/**
* Return the open file cache
*
* @return NetworkFileCache
*/
public final NetworkFileCache getFileCache() {
// Check if the file cache has been created
if (m_fileCache == null) {
m_fileCache = new NetworkFileCache(getUniqueId());
// Copy settings to the file cache
NFSConfigSection config = getNFSServer().getNFSConfiguration();
m_fileCache.setDebug(hasDebug(NFSSrvSession.Dbg.FILE));
if (config.getNFSFileCacheIOTimer() > 0)
m_fileCache.setIOTimer(config.getNFSFileCacheIOTimer());
if (config.getNFSFileCacheCloseTimer() > 0)
m_fileCache.setCloseTimer(config.getNFSFileCacheCloseTimer());
m_fileCache.setRpcAuthenticator(config.getRpcAuthenticator());
}
// Return the file cache
return m_fileCache;
}
/**
* Determine if the session has an associated packet handler
*
* @return boolean
*/
public final boolean hasPacketHandler() {
return m_pktHandler != null ? true : false;
}
/**
* Return the associated packet handler
*
* @return RpcPacketHandler
*/
public final RpcPacketHandler getPacketHandler() {
return m_pktHandler;
}
/**
* Determine if the session has an authentication identifier
*
* @return boolean
*/
public final boolean hasAuthIdentifier() {
return m_authIdentifier != null ? true : false;
}
/**
* Return the authentication identifier
*
* @return Object
*/
public final Object getAuthIdentifier() {
return m_authIdentifier;
}
/**
* Return the client network address
*
* @return InetAddress
*/
public InetAddress getRemoteAddress() {
return m_remAddr;
}
/**
* Return the remote port
*
* @return int
*/
public final int getRemotePort() {
return m_remPort;
}
/**
* Get the last access date/time for the session
*
* @return long
*/
public final long getLastAccess() {
return m_lastAccess;
}
/**
* return the NFS client information
*
* @return ClientInfo
*/
public final ClientInfo getNFSClientInformation() {
return m_nfsClientInfo;
}
/**
* Set the NFS client information
*
* @param cInfo ClientInfo
*/
public final void setNFSClientInformation(ClientInfo cInfo) {
m_nfsClientInfo = cInfo;
}
/**
* Check if the session has an associated RPC processor
*
* @return boolean
*/
public final boolean hasRpcProcessor() {
return m_rpcProcessor != null ? true : false;
}
/**
* Get the associated RPC processor
*
* @return RpcSessionProcessor
*/
public final RpcSessionProcessor getRpcProcessor() {
return m_rpcProcessor;
}
/**
* Set the associated RPC processor
*
* @param rpcProc RpcSessionProcessor
*/
public final void setRpcProcessor(RpcSessionProcessor rpcProc) {
m_rpcProcessor = rpcProc;
}
/**
* Find the tree connection for the specified share hash
*
* @param shareHash int
* @return TreeConnection
*/
public final TreeConnection findConnection(int shareHash) {
if (m_connections == null)
return null;
return m_connections.findConnection(shareHash);
}
/**
* Add a new connection to the list of active tree connections for this session
*
* @param tree TreeConnection
*/
public final void addConnection(TreeConnection tree) {
if (m_connections == null)
m_connections = new TreeConnectionHash();
m_connections.addConnection(tree);
}
/**
* Remove a connection from the list of active tree connections for this session
*
* @param tree TreeConnection
*/
public final void removeConnection(TreeConnection tree) {
if (m_connections == null)
return;
m_connections.deleteConnection(tree.getSharedDevice().getName());
}
/**
* Set the authentication identifier
*
* @param authIdent Object
*/
public final void setAuthIdentifier(Object authIdent) {
m_authIdentifier = authIdent;
}
/**
* Set the last access date/time for the session
*
* @param dateTime long
*/
public final void setLastAccess(long dateTime) {
m_lastAccess = dateTime;
}
/**
* Set the last access date/time for the session
*/
public final void setLastAccess() {
m_lastAccess = System.currentTimeMillis();
}
/**
* Close the session, cleanup any resources.
*/
public void closeSession() {
// Cleanup open files, tree connections and searches
cleanupSession();
// Inform listeners that the session has closed
getNFSServer().fireSessionClosed(this);
// Call the base class
super.closeSession();
}
/**
* Allocate a slot in the active searches list for a new search.
*
* @param search SearchContext
* @return int Search slot index, or -1 if there are no more search slots available.
*/
public synchronized final int allocateSearchSlot(SearchContext search) {
// Check if the search array has been allocated
if (m_search == null)
m_search = new SearchContext[DefaultSearches];
// Find a free slot for the new search
int idx = 0;
while (idx < m_search.length && m_search[idx] != null)
idx++;
// Check if we found a free slot
if (idx == m_search.length) {
// The search array needs to be extended, check if we reached the limit.
if (m_search.length >= MaxSearches)
return -1;
// Extend the search array
SearchContext[] newSearch = new SearchContext[m_search.length * 2];
System.arraycopy(m_search, 0, newSearch, 0, m_search.length);
m_search = newSearch;
}
// If the search context is valid then store in the allocated slot
if (search != null)
m_search[idx] = search;
// Return the allocated search slot index
m_searchCount++;
return idx;
}
/**
* Deallocate the specified search context/slot.
*
* @param ctxId int
*/
public synchronized final void deallocateSearchSlot(int ctxId) {
// Check if the search array has been allocated and that the index is valid
if (m_search == null || ctxId >= m_search.length)
return;
// Close the search
if (m_search[ctxId] != null)
m_search[ctxId].closeSearch();
// Free the specified search context slot
m_searchCount--;
m_search[ctxId] = null;
}
/**
* Return the NFS server that the session is associated with
*
* @return NFSServer
*/
public final NFSServer getNFSServer() {
return (NFSServer) getServer();
}
/**
* Return the search context for the specified search id.
*
* @param srchId int
* @return SearchContext
*/
public final SearchContext getSearchContext(int srchId) {
// Check if the search array is valid and the search index is valid
if (m_search == null || srchId >= m_search.length)
return null;
// Return the required search context
return m_search[srchId];
}
/**
* Return the number of active tree searches.
*
* @return int
*/
public final int getSearchCount() {
return m_searchCount;
}
/**
* Store the seach context in the specified slot.
*
* @param slot Slot to store the search context.
* @param srch SearchContext
*/
protected final void setSearchContext(int slot, SearchContext srch) {
// Check if the search slot id is valid
if (m_search == null || slot > m_search.length)
return;
// Store the context
m_search[slot] = srch;
}
/**
* Cleanup any resources owned by this session, close files, searches and change notification requests.
*/
protected final void cleanupSession() {
// Debug
if (Debug.EnableInfo && hasDebug(Dbg.SESSION))
debugPrintln("NFS Cleanup session, searches=" + getSearchCount() +
", files=" + (m_fileCache != null ? m_fileCache.numberOfEntries() : 0) +
", treeConns=" + (m_connections != null ? m_connections.numberOfEntries() : 0));
// Check if there are any active searches
if (m_search != null) {
// Close all active searches
for (int idx = 0; idx < m_search.length; idx++) {
// Check if the current search slot is active
if (m_search[idx] != null)
deallocateSearchSlot(idx);
}
// Release the search context list, clear the search count
m_search = null;
m_searchCount = 0;
}
// Close any open files
if (m_fileCache != null)
m_fileCache.closeAllFiles();
// Check if there are open tree connections
if (m_connections != null && m_connections.numberOfEntries() > 0) {
// Enumerate the active connections
Enumeration conns = m_connections.enumerateConnections();
while (conns.hasMoreElements()) {
// Get the current tree connection
TreeConnection tree = conns.nextElement();
tree.closeConnection(this);
// Inform the driver that the connection has been closed
DeviceInterface devIface = tree.getInterface();
if (devIface != null)
devIface.treeClosed(this, tree);
// Release the connection list
m_connections = null;
}
}
}
/**
* Indicate that NFS filesystem searches are case sensitive
*
* @return boolean
*/
public boolean useCaseSensitiveSearch() {
return true;
}
}