erofs-freebsd-out-tree/tests/TC139-fifo-acl-xattr-readonly.md

Test Case: FIFO ACL and xattr read-only VOPs

Test ID: TC139-fifo-acl-xattr-readonly Fixture: basic.erofs, /fifo-node

Objective

Verify FIFO stat, ACL, and xattr reads without opening FIFO data, and require read-only errors for all mutations. The transformer must record the regular placeholder to FIFO i_mode change and ACL body fields.

Manual steps

stat -f 'type=%HT mode=%Sp size=%z inode=%i' /mnt/repo22-g4/fifo-node
getfacl -n /mnt/repo22-g4/fifo-node
lsextattr system /mnt/repo22-g4/fifo-node
lsextattr user /mnt/repo22-g4/fifo-node
getextattr -qq -x system posix_acl_access /mnt/repo22-g4/fifo-node
getextattr -qq -x user fifo_note /mnt/repo22-g4/fifo-node
truss -o /tmp/tc139-acl.truss setfacl -m u::rwx /mnt/repo22-g4/fifo-node
truss -o /tmp/tc139-set.truss setextattr user repo22 changed \
  /mnt/repo22-g4/fifo-node
truss -o /tmp/tc139-del.truss rmextattr system posix_acl_access \
  /mnt/repo22-g4/fifo-node

Expected results

Stat reports FIFO, reads return the exact ACL and fifo-readonly-xattr, and all three mutations return EROFS (30). Nothing blocks or logs a trap. Clean up.