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R3704/hadoop-2.3.0-src/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_statfs.c
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fuse_impls_statfs.c
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "fuse_dfs.h"
#include "fuse_impls.h"
#include "fuse_connect.h"
int dfs_statfs(const char *path, struct statvfs *st)
{
struct hdfsConn *conn = NULL;
hdfsFS fs;
dfs_context *dfs = (dfs_context*)fuse_get_context()->private_data;
int ret;
TRACE1("statfs",path)
assert(path);
assert(st);
assert(dfs);
memset(st,0,sizeof(struct statvfs));
ret = fuseConnectAsThreadUid(&conn);
if (ret) {
fprintf(stderr, "fuseConnectAsThreadUid: failed to open a libhdfs "
"connection! error %d.\n", ret);
ret = -EIO;
goto cleanup;
}
fs = hdfsConnGetFs(conn);
const tOffset cap = hdfsGetCapacity(fs);
const tOffset used = hdfsGetUsed(fs);
const tOffset bsize = hdfsGetDefaultBlockSize(fs);
st->f_bsize = bsize;
st->f_frsize = bsize;
st->f_blocks = cap/bsize;
st->f_bfree = (cap-used)/bsize;
st->f_bavail = (cap-used)/bsize;
st->f_files = 1000;
st->f_ffree = 500;
st->f_favail = 500;
st->f_fsid = 1023;
st->f_flag = ST_RDONLY | ST_NOSUID;
st->f_namemax = 1023;
ret = 0;
cleanup:
if (conn) {
hdfsConnRelease(conn);
}
return ret;
}
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