fuse_impls_release.c
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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"
- /**
- * This mutex is to protect releasing a file handle in case the user calls close in different threads
- * and fuse passes these calls to here.
- */
- pthread_mutex_t release_mutex = PTHREAD_MUTEX_INITIALIZER;
- int dfs_release (const char *path, struct fuse_file_info *fi) {
- TRACE1("release", 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);
- int ret = 0;
- //
- // Critical section - protect from multiple close calls in different threads.
- // (no returns until end)
- //
- pthread_mutex_lock(&release_mutex);
- if (NULL != (void*)fi->fh) {
- dfs_fh *fh = (dfs_fh*)fi->fh;
- assert(fh);
- hdfsFile file_handle = (hdfsFile)fh->hdfsFH;
- if (NULL != file_handle) {
- if (hdfsCloseFile(fh->fs, file_handle) != 0) {
- syslog(LOG_ERR, "ERROR: dfs problem - could not close file_handle(%ld) for %s %s:%dn",(long)file_handle,path, __FILE__, __LINE__);
- fprintf(stderr, "ERROR: dfs problem - could not close file_handle(%ld) for %s %s:%dn",(long)file_handle,path, __FILE__, __LINE__);
- ret = -EIO;
- }
- }
- if (fh->buf != NULL) {
- free(fh->buf);
- }
- // this is always created and initialized, so always destroy it. (see dfs_open)
- pthread_mutex_destroy(&fh->mutex);
- free(fh);
- fi->fh = (uint64_t)0;
- }
- pthread_mutex_unlock(&release_mutex);
- //
- // End critical section
- //
- return ret;
- }