ngx_file_fs_size  172 src/core/ngx_open_file_cache.c             of->fs_size = ngx_file_fs_size(&fi);
ngx_file_fs_size  938 src/core/ngx_open_file_cache.c     of->fs_size = ngx_file_fs_size(&fi);
ngx_file_fs_size 1374 src/http/ngx_http_file_cache.c             fs_size = (ngx_file_fs_size(&fi) + cache->bsize - 1) / cache->bsize;