| dirs1[pageno] = mkdir(m, md, m0, m1, entries), pageno ∈ dirs1, dent.name ∈ entries, links(pageno, dirs1) ≠ ∅ ∨ pageno = ROOT_INO ⊦ ⟨err := ESUCCESS⟩ (mkdentry(dent.name, entries[dent.name]) = mkdentry(dent.name, entries[dent.name]) ∧ err = ESUCCESS), ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ (dent = mkdentry(dent.name, entries[dent.name]) ∧ err = ESUCCESS) |