# Test Case: chmod Rejection

**Test ID**: TC061-setattr-chmod-reject
**Category**: Read-Only Enforcement
**Priority**: Critical

## Objective

Verify a direct chmod request returns EROFS and leaves metadata unchanged.

## Procedure

Mount vfs/vfs-plain.erofs and run:

    ./g3_vfs_probe stat /tmp/repo22-g3/mnt/testdir/file.txt > TC061-before.txt
    ./g3_vfs_probe expect-error chmod \
      /tmp/repo22-g3/mnt/testdir/file.txt 30
    ./g3_vfs_probe stat /tmp/repo22-g3/mnt/testdir/file.txt > TC061-after.txt
    cmp TC061-before.txt TC061-after.txt

## Expected Results

chmod reports errno 30 and complete metadata remains unchanged. Record output,
fixture hash, and cleanup.