| /** |
| * 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) |
| { |
| TRACE1("statfs",path) |
| |
| // retrieve dfs specific data |
| dfs_context *dfs = (dfs_context*)fuse_get_context()->private_data; |
| |
| // check params and the context var |
| assert(path); |
| assert(st); |
| assert(dfs); |
| |
| // init the stat structure |
| memset(st,0,sizeof(struct statvfs)); |
| |
| hdfsFS userFS; |
| // if not connected, try to connect and fail out if we can't. |
| if ((userFS = doConnectAsUser(dfs->nn_hostname,dfs->nn_port))== NULL) { |
| ERROR("Could not connect"); |
| return -EIO; |
| } |
| |
| const tOffset cap = hdfsGetCapacity(userFS); |
| const tOffset used = hdfsGetUsed(userFS); |
| const tOffset bsize = hdfsGetDefaultBlockSize(userFS); |
| |
| // fill in the statvfs structure |
| |
| /* FOR REFERENCE: |
| struct statvfs { |
| unsigned long f_bsize; // file system block size |
| unsigned long f_frsize; // fragment size |
| fsblkcnt_t f_blocks; // size of fs in f_frsize units |
| fsblkcnt_t f_bfree; // # free blocks |
| fsblkcnt_t f_bavail; // # free blocks for non-root |
| fsfilcnt_t f_files; // # inodes |
| fsfilcnt_t f_ffree; // # free inodes |
| fsfilcnt_t f_favail; // # free inodes for non-root |
| unsigned long f_fsid; // file system id |
| unsigned long f_flag; / mount flags |
| unsigned long f_namemax; // maximum filename length |
| }; |
| */ |
| |
| 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; |
| |
| return 0; |
| } |
| |