m_ext_free_t
mb_alloc_ext_pgs(int how, m_ext_free_t ext_free, int flags)
m_extadd(struct mbuf *mb, char *buf, u_int size, m_ext_free_t freef,
m_ext_free_t *ext_free;
struct mbuf *mb_alloc_ext_pgs(int, m_ext_free_t, int);
void m_extadd(struct mbuf *, char *, u_int, m_ext_free_t,
m_ext_free_t freef, void *arg1, void *arg2)