Package org.apache.hadoop.nfs.nfs3.Nfs3Constant

Examples of org.apache.hadoop.nfs.nfs3.Nfs3Constant.NFSPROC3


  }
 
  @Override
  public void handleInternal(ChannelHandlerContext ctx, RpcInfo info) {
    RpcCall rpcCall = (RpcCall) info.header();
    final NFSPROC3 nfsproc3 = NFSPROC3.fromValue(rpcCall.getProcedure());
    int xid = rpcCall.getXid();
    byte[] data = new byte[info.data().readableBytes()];
    info.data().readBytes(data);
    XDR xdr = new XDR(data);
    XDR out = new XDR();
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    RpcUtil.sendRpcResponse(ctx, rsp);
  }
 
  @Override
  protected boolean isIdempotent(RpcCall call) {
    final NFSPROC3 nfsproc3 = NFSPROC3.fromValue(call.getProcedure());
    return nfsproc3 == null || nfsproc3.isIdempotent();
  }
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      return new WRITE3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    long offset = request.getOffset();
    int count = request.getCount();
    WriteStableHow stableHow = request.getStableHow();
    byte[] data = request.getData().array();
    if (data.length < count) {
      LOG.error("Invalid argument, data size is less than count in request");
      return new WRITE3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    FileHandle handle = request.getHandle();
    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS WRITE fileId: " + handle.getFileId() + " offset: "
          + offset + " length:" + count + " stableHow:" + stableHow.getValue()
          + " xid:" + xid);
    }

    Nfs3FileAttributes preOpAttr = null;
    try {
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    FileHandle handle = request.getHandle();
    if (LOG.isTraceEnabled()) {
      LOG.trace("GETATTR for fileId: " + handle.getFileId());
    }

    Nfs3FileAttributes attrs = null;
    try {
      attrs = writeManager.getFileAttr(dfsClient, handle, iug);
    } catch (RemoteException r) {
      LOG.warn("Exception ", r);
      IOException io = r.unwrapRemoteException();
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      response.setStatus(Nfs3Status.NFS3ERR_INVAL);
      return response;
    }

    String fileIdPath = Nfs3Utils.getFileIdPath(handle);
    Nfs3FileAttributes preOpAttr = null;
    try {
      preOpAttr = Nfs3Utils.getFileAttr(dfsClient, fileIdPath, iug);
      if (preOpAttr == null) {
        LOG.info("Can't get path for fileId:" + handle.getFileId());
        response.setStatus(Nfs3Status.NFS3ERR_STALE);
        return response;
      }
      WccAttr preOpWcc = Nfs3Utils.getWccAttr(preOpAttr);
      if (request.isCheck()) {
        if (!preOpAttr.getCtime().equals(request.getCtime())) {
          WccData wccData = new WccData(preOpWcc, preOpAttr);
          return new SETATTR3Response(Nfs3Status.NFS3ERR_NOT_SYNC, wccData);
        }
      }
     
      // check the write access privilege
      if (!checkAccessPrivilege(client, AccessPrivilege.READ_WRITE)) {
        return new SETATTR3Response(Nfs3Status.NFS3ERR_ACCES, new WccData(
            preOpWcc, preOpAttr));
      }

      setattrInternal(dfsClient, fileIdPath, request.getAttr(), true);
      Nfs3FileAttributes postOpAttr = Nfs3Utils.getFileAttr(dfsClient,
          fileIdPath, iug);
      WccData wccData = new WccData(preOpWcc, postOpAttr);
      return new SETATTR3Response(Nfs3Status.NFS3_OK, wccData);
    } catch (IOException e) {
      LOG.warn("Exception ", e);
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          + fileName);
    }

    try {
      String dirFileIdPath = Nfs3Utils.getFileIdPath(dirHandle);
      Nfs3FileAttributes postOpObjAttr = writeManager.getFileAttr(dfsClient,
          dirHandle, fileName);
      if (postOpObjAttr == null) {
        if (LOG.isDebugEnabled()) {
          LOG.debug("NFS LOOKUP fileId: " + dirHandle.getFileId() + " name:"
              + fileName + " does not exist");
        }
        Nfs3FileAttributes postOpDirAttr = Nfs3Utils.getFileAttr(dfsClient,
            dirFileIdPath, iug);
        return new LOOKUP3Response(Nfs3Status.NFS3ERR_NOENT, null, null,
            postOpDirAttr);
      }

      Nfs3FileAttributes postOpDirAttr = Nfs3Utils.getFileAttr(dfsClient,
          dirFileIdPath, iug);
      if (postOpDirAttr == null) {
        LOG.info("Can't get path for dir fileId:" + dirHandle.getFileId());
        return new LOOKUP3Response(Nfs3Status.NFS3ERR_STALE);
      }
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      LOG.error("Invalid ACCESS request");
      return new ACCESS3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    FileHandle handle = request.getHandle();
    Nfs3FileAttributes attrs;

    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS ACCESS fileId: " + handle.getFileId());
    }
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    String fileIdPath = Nfs3Utils.getFileIdPath(handle);
    try {
      String target = dfsClient.getLinkTarget(fileIdPath);

      Nfs3FileAttributes postOpAttr = Nfs3Utils.getFileAttr(dfsClient,
          fileIdPath, iug);
      if (postOpAttr == null) {
        LOG.info("Can't get path for fileId:" + handle.getFileId());
        return new READLINK3Response(Nfs3Status.NFS3ERR_STALE);
      }
      if (postOpAttr.getType() != NfsFileType.NFSLNK.toValue()) {
        LOG.error("Not a symlink, fileId:" + handle.getFileId());
        return new READLINK3Response(Nfs3Status.NFS3ERR_INVAL);
      }
      if (target == null) {
        LOG.error("Symlink target should not be null, fileId:"
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    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS READ fileId: " + handle.getFileId() + " offset: " + offset
          + " count: " + count);
    }

    Nfs3FileAttributes attrs;
    boolean eof;
    if (count == 0) {
      // Only do access check.
      try {
        // Don't read from cache. Client may not have read permission.
        attrs = Nfs3Utils.getFileAttr(dfsClient,
            Nfs3Utils.getFileIdPath(handle), iug);
      } catch (IOException e) {
        if (LOG.isDebugEnabled()) {
          LOG.debug("Get error accessing file, fileId:" + handle.getFileId(), e);
        }
        return new READ3Response(Nfs3Status.NFS3ERR_IO);
      }
      if (attrs == null) {
        if (LOG.isDebugEnabled()) {
          LOG.debug("Can't get path for fileId:" + handle.getFileId());
        }
        return new READ3Response(Nfs3Status.NFS3ERR_NOENT);
      }
      int access = Nfs3Utils.getAccessRightsForUserGroup(
          securityHandler.getUid(), securityHandler.getGid(), attrs);
      if ((access & Nfs3Constant.ACCESS3_READ) != 0) {
        eof = offset < attrs.getSize() ? false : true;
        return new READ3Response(Nfs3Status.NFS3_OK, attrs, 0, eof,
            ByteBuffer.wrap(new byte[0]));
      } else {
        return new READ3Response(Nfs3Status.NFS3ERR_ACCES);
      }
    }
   
    // In case there is buffered data for the same file, flush it. This can be
    // optimized later by reading from the cache.
    int ret = writeManager.commitBeforeRead(dfsClient, handle, offset + count);
    if (ret != Nfs3Status.NFS3_OK) {
      LOG.warn("commitBeforeRead didn't succeed with ret=" + ret
          + ". Read may not get most recent data.");
    }

    try {
      int rtmax = config.getInt(Nfs3Constant.MAX_READ_TRANSFER_SIZE_KEY,
              Nfs3Constant.MAX_READ_TRANSFER_SIZE_DEFAULT);
      int buffSize = Math.min(rtmax, count);
      byte[] readbuffer = new byte[buffSize];

      int readCount = 0;
      /**
       * Retry exactly once because the DFSInputStream can be stale.
       */
      for (int i = 0; i < 1; ++i) {
        FSDataInputStream fis = clientCache.getDfsInputStream(userName,
            Nfs3Utils.getFileIdPath(handle));

        try {
          readCount = fis.read(offset, readbuffer, 0, count);
        } catch (IOException e) {
          // TODO: A cleaner way is to throw a new type of exception
          // which requires incompatible changes.
          if (e.getMessage() == "Stream closed") {
            clientCache.invalidateDfsInputStream(userName,
                Nfs3Utils.getFileIdPath(handle));
            continue;
          } else {
            throw e;
          }
        }
      }

      attrs = Nfs3Utils.getFileAttr(dfsClient, Nfs3Utils.getFileIdPath(handle),
          iug);
      if (readCount < count) {
        LOG.info("Partical read. Asked offset:" + offset + " count:" + count
            + " and read back:" + readCount + "file size:" + attrs.getSize());
      }
      // HDFS returns -1 for read beyond file size.
      if (readCount < 0) {
        readCount = 0;
      }
      eof = (offset + readCount) < attrs.getSize() ? false : true;
      return new READ3Response(Nfs3Status.NFS3_OK, attrs, readCount, eof,
          ByteBuffer.wrap(readbuffer));

    } catch (IOException e) {
      LOG.warn("Read error: " + e.getClass() + " offset: " + offset
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      LOG.debug("NFS WRITE fileId: " + handle.getFileId() + " offset: "
          + offset + " length:" + count + " stableHow:" + stableHow.getValue()
          + " xid:" + xid);
    }

    Nfs3FileAttributes preOpAttr = null;
    try {
      preOpAttr = writeManager.getFileAttr(dfsClient, handle, iug);
      if (preOpAttr == null) {
        LOG.error("Can't get path for fileId:" + handle.getFileId());
        return new WRITE3Response(Nfs3Status.NFS3ERR_STALE);
      }
     
      if (!checkAccessPrivilege(client, AccessPrivilege.READ_WRITE)) {
        return new WRITE3Response(Nfs3Status.NFS3ERR_ACCES, new WccData(
            Nfs3Utils.getWccAttr(preOpAttr), preOpAttr), 0, stableHow,
            Nfs3Constant.WRITE_COMMIT_VERF);
      }
     
      if (LOG.isDebugEnabled()) {
        LOG.debug("requesed offset=" + offset + " and current filesize="
            + preOpAttr.getSize());
      }

      writeManager.handleWrite(dfsClient, request, channel, xid, preOpAttr);

    } catch (IOException e) {
      LOG.info("Error writing to fileId " + handle.getFileId() + " at offset "
          + offset + " and length " + data.length, e);
      // Try to return WccData
      Nfs3FileAttributes postOpAttr = null;
      try {
        postOpAttr = writeManager.getFileAttr(dfsClient, handle, iug);
      } catch (IOException e1) {
        LOG.info("Can't get postOpAttr for fileId: " + handle.getFileId(), e1);
      }
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