Add GetFileSize to fuse getattr
Add GetFileSize to fuse getattr

linyvxiang/dfs,myawan/bfs-1,lylei/dfs,yvxiang/coverage_for_bfs,bluebore/dfs,bluebore/bfs,yvxiang/dfs,yvxiang/coverage_for_bfs,linyvxiang/dfs,myawan/bfs-1,bluebore/dfs,yvxiang/dfs,bluebore/bfs,imotai/bfs,yvxiang/coverage_for_bfs,baidu/bfs,baidu/bfs,yvxiang/dfs,lylei/dfs,imotai/bfs,linyvxiang/dfs,myawan/bfs-1,00k/ToyDFS,lylei/dfs,myawan/bfs-1,yvxiang/dfs,baidu/bfs,00k/ToyDFS,bluebore/bfs,bluebore/dfs,yvxiang/coverage_for_bfs,lylei/dfs,imotai/bfs,baidu/bfs