erofs-freebsd-out-tree/tests/TC051-namecache-hit.md

Test Case: Repeated Positive Lookup Behavior

Test ID: TC051-namecache-hit Category: VFS Integration Priority: High

Objective

Verify repeated positive pathname lookups remain stable within one mount. This is behavior-level namecache integration coverage; timing differences do not prove an internal cache hit.

Procedure

Mount vfs/vfs-plain.erofs and run:

stat -f 'ino=%i mode=%p size=%z gen=%v' \
  /tmp/repo22-g3/mnt/testdir/file.txt > TC051-first.txt
stat -f 'ino=%i mode=%p size=%z gen=%v' \
  /tmp/repo22-g3/mnt/testdir/file.txt > TC051-second.txt
cmp TC051-first.txt TC051-second.txt
cmp fixtures/vfs/source/testdir/file.txt \
  /tmp/repo22-g3/mnt/testdir/file.txt

Expected Results

Both lookups succeed with byte-identical metadata and data. Record only this observable behavior as PASS; do not claim a measured cache hit without kernel instrumentation. Record output and cleanup.