Function crypto_copyback

freebsd/opencrypto/criov.c:592–627

}

void
crypto_copyback(struct cryptop *crp, int off, int size, const void *src)
{
	struct crypto_buffer *cb;

	if (crp->crp_obuf.cb_type != CRYPTO_BUF_NONE)
		cb = &crp->crp_obuf;
	else
		cb = &crp->crp_buf;
	switch (cb->cb_type) {
	case CRYPTO_BUF_MBUF:
		m_copyback(cb->cb_mbuf, off, size, src);
		break;
#if CRYPTO_MAY_HAVE_VMPAGE
	case CRYPTO_BUF_VMPAGE:
		MPASS(size <= cb->cb_vm_page_len);
		MPASS(size + off <=
		    cb->cb_vm_page_len + cb->cb_vm_page_offset);
		cvm_page_copyback(cb->cb_vm_page,
		    off + cb->cb_vm_page_offset, size, src);
		break;
#endif /* CRYPTO_MAY_HAVE_VMPAGE */
	case CRYPTO_BUF_UIO:
		cuio_copyback(cb->cb_uio, off, size, src);
		break;
	case CRYPTO_BUF_CONTIG:
		MPASS(off + size <= cb->cb_buf_len);
		bcopy(src, cb->cb_buf + off, size);
		break;
	default:
#ifdef INVARIANTS
		panic("invalid crp buf type %d", cb->cb_type);
#endif
		break;
	}
}

void
crypto_copydata(struct cryptop *crp, int off, int size, void *dst)