fuse_impls_getattr.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_stat_struct.h"
- int dfs_getattr(const char *path, struct stat *st)
- {
- TRACE1("getattr", path)
- // retrieve dfs specific data
- dfs_context *dfs = (dfs_context*)fuse_get_context()->private_data;
- // check params and the context var
- assert(dfs);
- assert(path);
- assert(st);
- // if not connected, try to connect and fail out if we can't.
- if (NULL == dfs->fs && NULL == (dfs->fs = hdfsConnect(dfs->nn_hostname,dfs->nn_port))) {
- syslog(LOG_ERR, "ERROR: could not connect to %s:%d %s:%dn", dfs->nn_hostname, dfs->nn_port,__FILE__, __LINE__);
- return -EIO;
- }
- // call the dfs API to get the actual information
- hdfsFileInfo *info = hdfsGetPathInfo(dfs->fs,path);
- if (NULL == info) {
- return -ENOENT;
- }
- fill_stat_structure(&info[0], st);
- // setup hard link info - for a file it is 1 else num entries in a dir + 2 (for . and ..)
- if (info[0].mKind == kObjectKindDirectory) {
- int numEntries = 0;
- hdfsFileInfo *info = hdfsListDirectory(dfs->fs,path,&numEntries);
- if (info) {
- hdfsFreeFileInfo(info,numEntries);
- }
- st->st_nlink = numEntries + 2;
- } else {
- // not a directory
- st->st_nlink = 1;
- }
- // free the info pointer
- hdfsFreeFileInfo(info,1);
- return 0;
- }