02a5551ba3
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1363904 13f79535-47bb-0310-9956-ffa450edef68
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __FUSE_CONNECT_H__
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#define __FUSE_CONNECT_H__
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struct fuse_context;
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struct hdfsConn;
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struct hdfs_internal;
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/**
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* Initialize the fuse connection subsystem.
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*
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* This must be called before any of the other functions in this module.
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*
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* @param nnUri The NameNode URI
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* @param port The NameNode port
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*
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* @return 0 on success; error code otherwise
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*/
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int fuseConnectInit(const char *nnUri, int port);
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/**
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* Get a libhdfs connection.
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*
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* If there is an existing connection, it will be reused. If not, a new one
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* will be created.
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*
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* You must call hdfsConnRelease on the connection you get back!
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*
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* @param usrname The username to use
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* @param ctx The FUSE context to use (contains UID, PID of requestor)
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* @param conn (out param) The HDFS connection
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*
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* @return 0 on success; error code otherwise
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*/
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int fuseConnect(const char *usrname, struct fuse_context *ctx,
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struct hdfsConn **out);
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/**
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* Get a libhdfs connection.
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*
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* The same as fuseConnect, except the username will be determined from the FUSE
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* thread context.
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*
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* @param conn (out param) The HDFS connection
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*
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* @return 0 on success; error code otherwise
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*/
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int fuseConnectAsThreadUid(struct hdfsConn **conn);
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/**
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* Test whether we can connect to the HDFS cluster
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*
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* @return 0 on success; error code otherwise
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*/
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int fuseConnectTest(void);
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/**
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* Get the hdfsFS associated with an hdfsConn.
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*
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* @param conn The hdfsConn
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*
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* @return the hdfsFS
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*/
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struct hdfs_internal* hdfsConnGetFs(struct hdfsConn *conn);
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/**
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* Release an hdfsConn when we're done with it.
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*
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* @param conn The hdfsConn
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*/
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void hdfsConnRelease(struct hdfsConn *conn);
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#endif
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