Functionality of extended file system:
- Test directory support.
1 dir-mkdir
-2 dir-mk-vine
3 dir-mk-tree
1 dir-rmdir
-2 dir-rm-vine
3 dir-rm-tree
-1 dir-lsdir
+5 dir-vine
- Test file growth.
1 grow-create
1 grow-root-lg
- Test writing from multiple processes.
-3 syn-rw
+3 syn-rw