# Test Case: Dotdot Entry Handling

**Test ID**: TC050-dotdot-handling
**Category**: Directory Operations
**Priority**: High

## Objective

Verify dotdot is returned and resolves nested paths to the correct parent
vnode without lock-order failure.

## Procedure

Mount vfs/vfs-plain.erofs and run:

    ./readdir_probe /tmp/repo22-g3/mnt/parent/child 128
    stat -f '%i %HT' /tmp/repo22-g3/mnt/parent
    stat -f '%i %HT' /tmp/repo22-g3/mnt/parent/child/..
    cmp fixtures/vfs/source/parent/file.txt \
      /tmp/repo22-g3/mnt/parent/child/grandchild/../../file.txt

## Expected Results

The traversal contains one dotdot DT_DIR entry, both parent stat commands
report the same NID, and multiple dotdot components reach the expected file.
Record output, dmesg delta, and cleanup.