erofs-freebsd-out-tree/tests/TC033-tailpacking-normal.md

Test Case: FLAT_INLINE Tailpacking

Test ID: TC033-tailpacking-normal

Objective

Verify a 5000-byte file reads exactly across its full data block and 904-byte inline tail boundary.

Fixture

Use images/inline.erofs and source/inline/tailpacked.dat. Evidence asserts layout 2 and size 5000.

Procedure

stat -f 'size=%z blocks=%b' "$mnt/tailpacked.dat"
cmp /tmp/repo22-g1/source/inline/tailpacked.dat "$mnt/tailpacked.dat"
sha256 /tmp/repo22-g1/source/inline/tailpacked.dat "$mnt/tailpacked.dat"
./read_probe pread "$mnt/tailpacked.dat" 4080 64 /tmp/tc033-mounted-range
dd if=/tmp/repo22-g1/source/inline/tailpacked.dat \
  of=/tmp/tc033-source-range bs=1 skip=4080 count=64 2>/dev/null
cmp /tmp/tc033-source-range /tmp/tc033-mounted-range

Remove outputs, unmount, and detach.

Expected Results

• Full file and the range crossing logical offset 4096 match the source.
• The transition from plain block data to metadata tail is seamless and cleanup succeeds.