fuse_impls_flush.c
上传用户:quxuerui
上传日期:2018-01-08
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文件大小:2k
- /**
- * 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_file_handle.h"
- int dfs_flush(const char *path, struct fuse_file_info *fi) {
- TRACE1("flush", path)
- // retrieve dfs specific data
- dfs_context *dfs = (dfs_context*)fuse_get_context()->private_data;
- // check params and the context var
- assert(path);
- assert(dfs);
- assert('/' == *path);
- assert(fi);
- if (NULL == (void*)fi->fh) {
- return 0;
- }
- // note that fuse calls flush on RO files too and hdfs does not like that and will return an error
- if (fi->flags & O_WRONLY) {
- dfs_fh *fh = (dfs_fh*)fi->fh;
- assert(fh);
- hdfsFile file_handle = (hdfsFile)fh->hdfsFH;
- assert(file_handle);
- assert(fh->fs);
- if (hdfsFlush(fh->fs, file_handle) != 0) {
- syslog(LOG_ERR, "ERROR: dfs problem - could not flush file_handle(%lx) for %s %s:%dn",(long)file_handle,path, __FILE__, __LINE__);
- return -EIO;
- }
- }
- return 0;
- }