Package gnu.java.nio

Examples of gnu.java.nio.VMChannel$FileHandle


    } catch (IOException e) {
      LOG.error("Invalid READLINK request");
      return new READLINK3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    FileHandle handle = request.getHandle();
    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS READLINK fileId: " + handle.getFileId());
    }

    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:"
            + handle.getFileId());
        return new READLINK3Response(Nfs3Status.NFS3ERR_SERVERFAULT);
      }
      int rtmax = config.getInt(NfsConfigKeys.DFS_NFS_MAX_READ_TRANSFER_SIZE_KEY,
          NfsConfigKeys.DFS_NFS_MAX_READ_TRANSFER_SIZE_DEFAULT);
      if (rtmax < target.getBytes().length) {
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    }

    long offset = request.getOffset();
    int count = request.getCount();

    FileHandle handle = request.getHandle();
    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(),
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    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 {
      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(remoteAddress, 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);
      }
      WccAttr attr = preOpAttr == null ? null : Nfs3Utils.getWccAttr(preOpAttr);
      WccData fileWcc = new WccData(attr, postOpAttr);
      return new WRITE3Response(Nfs3Status.NFS3ERR_IO, fileWcc, 0,
          request.getStableHow(), Nfs3Constant.WRITE_COMMIT_VERF);
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    } catch (IOException e) {
      LOG.error("Invalid CREATE request");
      return new CREATE3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    FileHandle dirHandle = request.getHandle();
    String fileName = request.getName();
    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS CREATE dir fileId: " + dirHandle.getFileId()
          + " filename: " + fileName);
    }

    int createMode = request.getMode();
    if ((createMode != Nfs3Constant.CREATE_EXCLUSIVE)
        && request.getObjAttr().getUpdateFields().contains(SetAttrField.SIZE)
        && request.getObjAttr().getSize() != 0) {
      LOG.error("Setting file size is not supported when creating file: "
          + fileName + " dir fileId:" + dirHandle.getFileId());
      return new CREATE3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    HdfsDataOutputStream fos = null;
    String dirFileIdPath = Nfs3Utils.getFileIdPath(dirHandle);
    Nfs3FileAttributes preOpDirAttr = null;
    Nfs3FileAttributes postOpObjAttr = null;
    FileHandle fileHandle = null;
    WccData dirWcc = null;
    try {
      preOpDirAttr = Nfs3Utils.getFileAttr(dfsClient, dirFileIdPath, iug);
      if (preOpDirAttr == null) {
        LOG.error("Can't get path for dirHandle:" + dirHandle);
        return new CREATE3Response(Nfs3Status.NFS3ERR_STALE);
      }
     
      if (!checkAccessPrivilege(remoteAddress, AccessPrivilege.READ_WRITE)) {
        return new CREATE3Response(Nfs3Status.NFS3ERR_ACCES, null,
            preOpDirAttr, new WccData(Nfs3Utils.getWccAttr(preOpDirAttr),
                preOpDirAttr));
      }

      String fileIdPath = Nfs3Utils.getFileIdPath(dirHandle) + "/" + fileName;
      SetAttr3 setAttr3 = request.getObjAttr();
      assert (setAttr3 != null);
      FsPermission permission = setAttr3.getUpdateFields().contains(
          SetAttrField.MODE) ? new FsPermission((short) setAttr3.getMode())
          : FsPermission.getDefault().applyUMask(umask);
         
      EnumSet<CreateFlag> flag = (createMode != Nfs3Constant.CREATE_EXCLUSIVE) ?
          EnumSet.of(CreateFlag.CREATE, CreateFlag.OVERWRITE) :
          EnumSet.of(CreateFlag.CREATE);
     
      fos = new HdfsDataOutputStream(dfsClient.create(fileIdPath, permission,
          flag, false, replication, blockSize, null, bufferSize, null),
          statistics);
     
      if ((createMode == Nfs3Constant.CREATE_UNCHECKED)
          || (createMode == Nfs3Constant.CREATE_GUARDED)) {
        // Set group if it's not specified in the request.
        if (!setAttr3.getUpdateFields().contains(SetAttrField.GID)) {
          setAttr3.getUpdateFields().add(SetAttrField.GID);
          setAttr3.setGid(securityHandler.getGid());
        }
        setattrInternal(dfsClient, fileIdPath, setAttr3, false);
      }

      postOpObjAttr = Nfs3Utils.getFileAttr(dfsClient, fileIdPath, iug);
      dirWcc = Nfs3Utils.createWccData(Nfs3Utils.getWccAttr(preOpDirAttr),
          dfsClient, dirFileIdPath, iug);
     
      // Add open stream
      OpenFileCtx openFileCtx = new OpenFileCtx(fos, postOpObjAttr,
          writeDumpDir + "/" + postOpObjAttr.getFileId(), dfsClient, iug,
          aixCompatMode);
      fileHandle = new FileHandle(postOpObjAttr.getFileId());
      if (!writeManager.addOpenFileStream(fileHandle, openFileCtx)) {
        LOG.warn("Can't add more stream, close it."
            + " Future write will become append");
        fos.close();
        fos = null;
      } else {
        if (LOG.isDebugEnabled()) {
          LOG.debug("Opened stream for file:" + fileName + ", fileId:"
              + fileHandle.getFileId());
        }
      }
     
    } catch (IOException e) {
      LOG.error("Exception", e);
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      request = new MKDIR3Request(xdr);
    } catch (IOException e) {
      LOG.error("Invalid MKDIR request");
      return new MKDIR3Response(Nfs3Status.NFS3ERR_INVAL);
    }
    FileHandle dirHandle = request.getHandle();
    String fileName = request.getName();

    if (request.getObjAttr().getUpdateFields().contains(SetAttrField.SIZE)) {
      LOG.error("Setting file size is not supported when mkdir: " + fileName
          + " in dirHandle" + dirHandle);
      return new MKDIR3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    String dirFileIdPath = Nfs3Utils.getFileIdPath(dirHandle);
    Nfs3FileAttributes preOpDirAttr = null;
    Nfs3FileAttributes postOpDirAttr = null;
    Nfs3FileAttributes postOpObjAttr = null;
    FileHandle objFileHandle = null;
    try {
      preOpDirAttr = Nfs3Utils.getFileAttr(dfsClient, dirFileIdPath, iug);
      if (preOpDirAttr == null) {
        LOG.info("Can't get path for dir fileId:" + dirHandle.getFileId());
        return new MKDIR3Response(Nfs3Status.NFS3ERR_STALE);
      }

      if (!checkAccessPrivilege(info, AccessPrivilege.READ_WRITE)) {
        return new MKDIR3Response(Nfs3Status.NFS3ERR_ACCES, null, preOpDirAttr,
            new WccData(Nfs3Utils.getWccAttr(preOpDirAttr), preOpDirAttr));
      }
     
      final String fileIdPath = dirFileIdPath + "/" + fileName;
      SetAttr3 setAttr3 = request.getObjAttr();
      FsPermission permission = setAttr3.getUpdateFields().contains(
          SetAttrField.MODE) ? new FsPermission((short) setAttr3.getMode())
          : FsPermission.getDefault().applyUMask(umask);

      if (!dfsClient.mkdirs(fileIdPath, permission, false)) {
        WccData dirWcc = Nfs3Utils.createWccData(
            Nfs3Utils.getWccAttr(preOpDirAttr), dfsClient, dirFileIdPath, iug);
        return new MKDIR3Response(Nfs3Status.NFS3ERR_IO, null, null, dirWcc);
      }

      // Set group if it's not specified in the request.
      if (!setAttr3.getUpdateFields().contains(SetAttrField.GID)) {
        setAttr3.getUpdateFields().add(SetAttrField.GID);
        setAttr3.setGid(securityHandler.getGid());
      }
      setattrInternal(dfsClient, fileIdPath, setAttr3, false);
     
      postOpObjAttr = Nfs3Utils.getFileAttr(dfsClient, fileIdPath, iug);
      objFileHandle = new FileHandle(postOpObjAttr.getFileId());
      WccData dirWcc = Nfs3Utils.createWccData(
          Nfs3Utils.getWccAttr(preOpDirAttr), dfsClient, dirFileIdPath, iug);
      return new MKDIR3Response(Nfs3Status.NFS3_OK, new FileHandle(
          postOpObjAttr.getFileId()), postOpObjAttr, dirWcc);
    } catch (IOException e) {
      LOG.warn("Exception ", e);
      // Try to return correct WccData
      if (postOpDirAttr == null) {
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      request = new REMOVE3Request(xdr);
    } catch (IOException e) {
      LOG.error("Invalid REMOVE request");
      return new REMOVE3Response(Nfs3Status.NFS3ERR_INVAL);
    }
    FileHandle dirHandle = request.getHandle();
    String fileName = request.getName();
    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS REMOVE dir fileId: " + dirHandle.getFileId()
          + " fileName: " + fileName);
    }

    String dirFileIdPath = Nfs3Utils.getFileIdPath(dirHandle);
    Nfs3FileAttributes preOpDirAttr = null;
    Nfs3FileAttributes postOpDirAttr = null;
    try {
      preOpDirAttr =  Nfs3Utils.getFileAttr(dfsClient, dirFileIdPath, iug);
      if (preOpDirAttr == null) {
        LOG.info("Can't get path for dir fileId:" + dirHandle.getFileId());
        return new REMOVE3Response(Nfs3Status.NFS3ERR_STALE);
      }

      WccData errWcc = new WccData(Nfs3Utils.getWccAttr(preOpDirAttr),
          preOpDirAttr);
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      request = new RMDIR3Request(xdr);
    } catch (IOException e) {
      LOG.error("Invalid RMDIR request");
      return new RMDIR3Response(Nfs3Status.NFS3ERR_INVAL);
    }
    FileHandle dirHandle = request.getHandle();
    String fileName = request.getName();

    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS RMDIR dir fileId: " + dirHandle.getFileId()
          + " fileName: " + fileName);
    }

    String dirFileIdPath = Nfs3Utils.getFileIdPath(dirHandle);
    Nfs3FileAttributes preOpDirAttr = null;
    Nfs3FileAttributes postOpDirAttr = null;
    try {
      preOpDirAttr = Nfs3Utils.getFileAttr(dfsClient, dirFileIdPath, iug);
      if (preOpDirAttr == null) {
        LOG.info("Can't get path for dir fileId:" + dirHandle.getFileId());
        return new RMDIR3Response(Nfs3Status.NFS3ERR_STALE);
      }
     
      WccData errWcc = new WccData(Nfs3Utils.getWccAttr(preOpDirAttr),
          preOpDirAttr);
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    } catch (IOException e) {
      LOG.error("Invalid RENAME request");
      return new RENAME3Response(Nfs3Status.NFS3ERR_INVAL);
    }

    FileHandle fromHandle = request.getFromDirHandle();
    String fromName = request.getFromName();
    FileHandle toHandle = request.getToDirHandle();
    String toName = request.getToName();
    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS RENAME from: " + fromHandle.getFileId() + "/" + fromName
          + " to: " + toHandle.getFileId() + "/" + toName);
    }

    String fromDirFileIdPath = Nfs3Utils.getFileIdPath(fromHandle);
    String toDirFileIdPath = Nfs3Utils.getFileIdPath(toHandle);
    Nfs3FileAttributes fromPreOpAttr = null;
    Nfs3FileAttributes toPreOpAttr = null;
    WccData fromDirWcc = null;
    WccData toDirWcc = null;
    try {
      fromPreOpAttr = Nfs3Utils.getFileAttr(dfsClient, fromDirFileIdPath, iug);
      if (fromPreOpAttr == null) {
        LOG.info("Can't get path for fromHandle fileId:"
            + fromHandle.getFileId());
        return new RENAME3Response(Nfs3Status.NFS3ERR_STALE);
      }

      toPreOpAttr = Nfs3Utils.getFileAttr(dfsClient, toDirFileIdPath, iug);
      if (toPreOpAttr == null) {
        LOG.info("Can't get path for toHandle fileId:" + toHandle.getFileId());
        return new RENAME3Response(Nfs3Status.NFS3ERR_STALE);
      }
     
      if (!checkAccessPrivilege(info, AccessPrivilege.READ_WRITE)) {
        WccData fromWcc = new WccData(Nfs3Utils.getWccAttr(fromPreOpAttr),
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      LOG.error("Invalid SYMLINK request");
      response.setStatus(Nfs3Status.NFS3ERR_INVAL);
      return response;
    }

    FileHandle dirHandle = request.getHandle();
    String name = request.getName();
    String symData = request.getSymData();
    String linkDirIdPath = Nfs3Utils.getFileIdPath(dirHandle);
    // Don't do any name check to source path, just leave it to HDFS
    String linkIdPath = linkDirIdPath + "/" + name;
    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS SYMLINK, target: " + symData + " link: " + linkIdPath);
    }

    try {
      WccData dirWcc = response.getDirWcc();
      WccAttr preOpAttr = Nfs3Utils.getWccAttr(dfsClient, linkDirIdPath);
      dirWcc.setPreOpAttr(preOpAttr);

      dfsClient.createSymlink(symData, linkIdPath, false);
      // Set symlink attr is considered as to change the attr of the target
      // file. So no need to set symlink attr here after it's created.

      HdfsFileStatus linkstat = dfsClient.getFileLinkInfo(linkIdPath);
      Nfs3FileAttributes objAttr = Nfs3Utils.getNfs3FileAttrFromFileStatus(
          linkstat, iug);
      dirWcc
          .setPostOpAttr(Nfs3Utils.getFileAttr(dfsClient, linkDirIdPath, iug));

      return new SYMLINK3Response(Nfs3Status.NFS3_OK, new FileHandle(
          objAttr.getFileId()), objAttr, dirWcc);

    } catch (IOException e) {
      LOG.warn("Exception:" + e);
      response.setStatus(Nfs3Status.NFS3ERR_IO);
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      request = new READDIR3Request(xdr);
    } catch (IOException e) {
      LOG.error("Invalid READDIR request");
      return new READDIR3Response(Nfs3Status.NFS3ERR_INVAL);
    }
    FileHandle handle = request.getHandle();
    long cookie = request.getCookie();
    if (cookie < 0) {
      LOG.error("Invalid READDIR request, with negitve cookie:" + cookie);
      return new READDIR3Response(Nfs3Status.NFS3ERR_INVAL);
    }
    long count = request.getCount();
    if (count <= 0) {
      LOG.info("Nonpositive count in invalid READDIR request:" + count);
      return new READDIR3Response(Nfs3Status.NFS3_OK);
    }
   
    if (LOG.isDebugEnabled()) {
      LOG.debug("NFS READDIR fileId: " + handle.getFileId() + " cookie: "
          + cookie + " count: " + count);
    }

    HdfsFileStatus dirStatus = null;
    DirectoryListing dlisting = null;
    Nfs3FileAttributes postOpAttr = null;
    long dotdotFileId = 0;
    try {
      String dirFileIdPath = Nfs3Utils.getFileIdPath(handle);
      dirStatus = dfsClient.getFileInfo(dirFileIdPath);
      if (dirStatus == null) {
        LOG.info("Can't get path for fileId:" + handle.getFileId());
        return new READDIR3Response(Nfs3Status.NFS3ERR_STALE);
      }
      if (!dirStatus.isDir()) {
        LOG.error("Can't readdir for regular file, fileId:"
            + handle.getFileId());
        return new READDIR3Response(Nfs3Status.NFS3ERR_NOTDIR);
      }
      long cookieVerf = request.getCookieVerf();
      if ((cookieVerf != 0) && (cookieVerf != dirStatus.getModificationTime())) {
        if (aixCompatMode) {
          // The AIX NFS client misinterprets RFC-1813 and will repeatedly send
          // the same cookieverf value even across VFS-level readdir calls,
          // instead of getting a new cookieverf for every VFS-level readdir
          // call, and reusing the cookieverf only in the event that multiple
          // incremental NFS-level readdir calls must be made to fetch all of
          // the directory entries. This means that whenever a readdir call is
          // made by an AIX NFS client for a given directory, and that directory
          // is subsequently modified, thus changing its mtime, no later readdir
          // calls will succeed from AIX for that directory until the FS is
          // unmounted/remounted. See HDFS-6549 for more info.
          LOG.warn("AIX compatibility mode enabled, ignoring cookieverf " +
              "mismatches.");
        } else {
          LOG.error("CookieVerf mismatch. request cookieVerf: " + cookieVerf
              + " dir cookieVerf: " + dirStatus.getModificationTime());
          return new READDIR3Response(Nfs3Status.NFS3ERR_BAD_COOKIE);
        }
      }

      if (cookie == 0) {
        // Get dotdot fileId
        String dotdotFileIdPath = dirFileIdPath + "/..";
        HdfsFileStatus dotdotStatus = dfsClient.getFileInfo(dotdotFileIdPath);

        if (dotdotStatus == null) {
          // This should not happen
          throw new IOException("Can't get path for handle path:"
              + dotdotFileIdPath);
        }
        dotdotFileId = dotdotStatus.getFileId();
      }

      // Get the list from the resume point
      byte[] startAfter;
      if(cookie == 0 ) {
        startAfter = HdfsFileStatus.EMPTY_NAME;
      } else {
        String inodeIdPath = Nfs3Utils.getFileIdPath(cookie);
        startAfter = inodeIdPath.getBytes();
      }
     
      dlisting = listPaths(dfsClient, dirFileIdPath, startAfter);
      postOpAttr = Nfs3Utils.getFileAttr(dfsClient, dirFileIdPath, iug);
      if (postOpAttr == null) {
        LOG.error("Can't get path for fileId:" + handle.getFileId());
        return new READDIR3Response(Nfs3Status.NFS3ERR_STALE);
      }
    } catch (IOException e) {
      LOG.warn("Exception ", e);
      return new READDIR3Response(Nfs3Status.NFS3ERR_IO);
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