erofs-freebsd-out-tree/tests/TC052-namecache-miss.md

Test Case: Repeated Negative Lookup Behavior

Test ID: TC052-namecache-miss Category: VFS Integration Priority: High

Objective

Verify repeated missing-name lookups consistently return ENOENT and do not poison a later positive lookup. This is behavior-level negative-namecache coverage, not proof of an internal cache hit.

Procedure

Mount vfs/vfs-plain.erofs and run:

./g3_vfs_probe expect-error stat \
  /tmp/repo22-g3/mnt/testdir/cache-missing 2
./g3_vfs_probe expect-error stat \
  /tmp/repo22-g3/mnt/testdir/cache-missing 2
./g3_vfs_probe expect-success stat \
  /tmp/repo22-g3/mnt/testdir/file.txt

Expected Results

Both negative syscalls report errno 2 and the positive control succeeds. Record the stable behavior honestly, with no latency-based cache assertion, then clean the mount and md.