smb_mbuf_alloc_ext
mp = smb_mbuf_alloc_ext(iovp->iov_base, iovp->iov_len,
mp1->m_next = smb_mbuf_alloc_ext(iovp->iov_base,
m = smb_mbuf_alloc_ext(buf, len, smb_mbuf_kmem_free, NULL);
mbuf_t *smb_mbuf_alloc_ext(caddr_t, int, m_ext_free_t, void *);