org.apache.hadoop.hdfs.nfs.nfs3

Class Nfs3Utils

java.lang.Object

org.apache.hadoop.hdfs.nfs.nfs3.Nfs3Utils

public class Nfs3Utils
extends Object

Utility/helper methods related to NFS

Field Summary

Fields

Modifier and Type	Field and Description
static String	INODEID_PATH_PREFIX
static String	READ_RPC_END
static String	READ_RPC_START
static String	WRITE_RPC_END
static String	WRITE_RPC_START

Constructor Summary

Constructors

Constructor and Description
Nfs3Utils()

Method Summary

Modifier and Type	Method and Description
static long	bytesToLong(byte[] data)
static org.apache.hadoop.nfs.nfs3.response.WccData	createWccData(org.apache.hadoop.nfs.nfs3.response.WccAttr preOpAttr, org.apache.hadoop.hdfs.DFSClient dfsClient, String fileIdPath, org.apache.hadoop.security.IdMappingServiceProvider iug)
static int	getAccessRights(int mode, int type)
static int	getAccessRightsForUserGroup(int uid, int gid, int[] auxGids, org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes attr)
static long	getDirSize(int childNum) HDFS directory size is always zero.
static long	getElapsedTime(long startTimeNano)
static org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes	getFileAttr(org.apache.hadoop.hdfs.DFSClient client, String fileIdPath, org.apache.hadoop.security.IdMappingServiceProvider iug)
static String	getFileIdPath(org.apache.hadoop.nfs.nfs3.FileHandle handle)
static String	getFileIdPath(long fileId)
static org.apache.hadoop.hdfs.protocol.HdfsFileStatus	getFileStatus(org.apache.hadoop.hdfs.DFSClient client, String fileIdPath)
static int	getNamenodeId(org.apache.hadoop.conf.Configuration conf)
static int	getNamenodeId(org.apache.hadoop.conf.Configuration conf, URI namenodeURI)
static org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes	getNfs3FileAttrFromFileStatus(org.apache.hadoop.hdfs.protocol.HdfsFileStatus fs, org.apache.hadoop.security.IdMappingServiceProvider iug)
static URI	getResolvedURI(org.apache.hadoop.fs.FileSystem fs, String exportPath)
static org.apache.hadoop.nfs.nfs3.response.WccAttr	getWccAttr(org.apache.hadoop.hdfs.DFSClient client, String fileIdPath)
static org.apache.hadoop.nfs.nfs3.response.WccAttr	getWccAttr(org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes attr)
static byte[]	longToByte(long v)
static void	writeChannel(org.jboss.netty.channel.Channel channel, org.apache.hadoop.oncrpc.XDR out, int xid) Send a write response to the netty network socket channel
static void	writeChannelCommit(org.jboss.netty.channel.Channel channel, org.apache.hadoop.oncrpc.XDR out, int xid)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INODEID_PATH_PREFIX

public static final String INODEID_PATH_PREFIX

See Also:

Constant Field Values

READ_RPC_START

public static final String READ_RPC_START

See Also:

Constant Field Values

READ_RPC_END

public static final String READ_RPC_END

See Also:

Constant Field Values

WRITE_RPC_START

public static final String WRITE_RPC_START

See Also:

Constant Field Values

WRITE_RPC_END

public static final String WRITE_RPC_END

See Also:

Constant Field Values

Constructor Detail

Nfs3Utils

public Nfs3Utils()

Method Detail

getFileIdPath

public static String getFileIdPath(org.apache.hadoop.nfs.nfs3.FileHandle handle)

getFileIdPath

public static String getFileIdPath(long fileId)

getFileStatus

public static org.apache.hadoop.hdfs.protocol.HdfsFileStatus getFileStatus(org.apache.hadoop.hdfs.DFSClient client,
                                                                           String fileIdPath)
                                                                    throws IOException

Throws:

IOException

getNfs3FileAttrFromFileStatus

public static org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes getNfs3FileAttrFromFileStatus(org.apache.hadoop.hdfs.protocol.HdfsFileStatus fs,
                                                                                          org.apache.hadoop.security.IdMappingServiceProvider iug)

getFileAttr

public static org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes getFileAttr(org.apache.hadoop.hdfs.DFSClient client,
                                                                        String fileIdPath,
                                                                        org.apache.hadoop.security.IdMappingServiceProvider iug)
                                                                 throws IOException

Throws:

IOException

getDirSize

public static long getDirSize(int childNum)

HDFS directory size is always zero. Try to return something meaningful here. Assume each child take 32bytes.

Parameters:

childNum - number of children of the directory

Returns:

total size of the directory

getWccAttr

public static org.apache.hadoop.nfs.nfs3.response.WccAttr getWccAttr(org.apache.hadoop.hdfs.DFSClient client,
                                                                     String fileIdPath)
                                                              throws IOException

Throws:

IOException

getWccAttr

public static org.apache.hadoop.nfs.nfs3.response.WccAttr getWccAttr(org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes attr)

createWccData

public static org.apache.hadoop.nfs.nfs3.response.WccData createWccData(org.apache.hadoop.nfs.nfs3.response.WccAttr preOpAttr,
                                                                        org.apache.hadoop.hdfs.DFSClient dfsClient,
                                                                        String fileIdPath,
                                                                        org.apache.hadoop.security.IdMappingServiceProvider iug)
                                                                 throws IOException

Throws:

IOException

writeChannel

public static void writeChannel(org.jboss.netty.channel.Channel channel,
                                org.apache.hadoop.oncrpc.XDR out,
                                int xid)

Send a write response to the netty network socket channel

Parameters:

channel - channel to which the buffer needs to be written

out - xdr object to be written to the channel

xid - transaction identifier

writeChannelCommit

public static void writeChannelCommit(org.jboss.netty.channel.Channel channel,
                                      org.apache.hadoop.oncrpc.XDR out,
                                      int xid)

getAccessRights

public static int getAccessRights(int mode,
                                  int type)

getAccessRightsForUserGroup

public static int getAccessRightsForUserGroup(int uid,
                                              int gid,
                                              int[] auxGids,
                                              org.apache.hadoop.nfs.nfs3.Nfs3FileAttributes attr)

bytesToLong

public static long bytesToLong(byte[] data)

longToByte

public static byte[] longToByte(long v)

getElapsedTime

public static long getElapsedTime(long startTimeNano)

getNamenodeId

public static int getNamenodeId(org.apache.hadoop.conf.Configuration conf)

getNamenodeId

public static int getNamenodeId(org.apache.hadoop.conf.Configuration conf,
                                URI namenodeURI)

getResolvedURI

public static URI getResolvedURI(org.apache.hadoop.fs.FileSystem fs,
                                 String exportPath)
                          throws IOException

Throws:

IOException