Exemplos de xdr_check_read_list em C++ (Cpp)

Exemplo n.º 1

Arquivo: svc_rdma_marshal.c Projeto: BWhitten/linux-stable

/**
 * svc_rdma_xdr_decode_req - Parse incoming RPC-over-RDMA header
 * @rq_arg: Receive buffer
 *
 * On entry, xdr->head[0].iov_base points to first byte in the
 * RPC-over-RDMA header.
 *
 * On successful exit, head[0] points to first byte past the
 * RPC-over-RDMA header. For RDMA_MSG, this is the RPC message.
 * The length of the RPC-over-RDMA header is returned.
 */
int svc_rdma_xdr_decode_req(struct xdr_buf *rq_arg)
{
	__be32 *p, *end, *rdma_argp;
	unsigned int hdr_len;

	/* Verify that there's enough bytes for header + something */
	if (rq_arg->len <= RPCRDMA_HDRLEN_ERR)
		goto out_short;

	rdma_argp = rq_arg->head[0].iov_base;
	if (*(rdma_argp + 1) != rpcrdma_version)
		goto out_version;

	switch (*(rdma_argp + 3)) {
	case rdma_msg:
	case rdma_nomsg:
		break;

	case rdma_done:
		goto out_drop;

	case rdma_error:
		goto out_drop;

	default:
		goto out_proc;
	}

	end = (__be32 *)((unsigned long)rdma_argp + rq_arg->len);
	p = xdr_check_read_list(rdma_argp + 4, end);
	if (!p)
		goto out_inval;
	p = xdr_check_write_list(p, end);
	if (!p)
		goto out_inval;
	p = xdr_check_reply_chunk(p, end);
	if (!p)
		goto out_inval;
	if (p > end)
		goto out_inval;

	rq_arg->head[0].iov_base = p;
	hdr_len = (unsigned long)p - (unsigned long)rdma_argp;
	rq_arg->head[0].iov_len -= hdr_len;
	return hdr_len;

out_short:
	dprintk("svcrdma: header too short = %d\n", rq_arg->len);
	return -EINVAL;

out_version:
	dprintk("svcrdma: bad xprt version: %u\n",
		be32_to_cpup(rdma_argp + 1));
	return -EPROTONOSUPPORT;

out_drop:
	dprintk("svcrdma: dropping RDMA_DONE/ERROR message\n");
	return 0;

out_proc:
	dprintk("svcrdma: bad rdma procedure (%u)\n",
		be32_to_cpup(rdma_argp + 3));
	return -EINVAL;

out_inval:
	dprintk("svcrdma: failed to parse transport header\n");
	return -EINVAL;
}

Exemplo n.º 2

Arquivo: svc_rdma_recvfrom.c Projeto: AlexShiLucky/linux

/* On entry, xdr->head[0].iov_base points to first byte in the
 * RPC-over-RDMA header.
 *
 * On successful exit, head[0] points to first byte past the
 * RPC-over-RDMA header. For RDMA_MSG, this is the RPC message.
 * The length of the RPC-over-RDMA header is returned.
 *
 * Assumptions:
 * - The transport header is entirely contained in the head iovec.
 */
static int svc_rdma_xdr_decode_req(struct xdr_buf *rq_arg)
{
	__be32 *p, *end, *rdma_argp;
	unsigned int hdr_len;

	/* Verify that there's enough bytes for header + something */
	if (rq_arg->len <= RPCRDMA_HDRLEN_ERR)
		goto out_short;

	rdma_argp = rq_arg->head[0].iov_base;
	if (*(rdma_argp + 1) != rpcrdma_version)
		goto out_version;

	switch (*(rdma_argp + 3)) {
	case rdma_msg:
		break;
	case rdma_nomsg:
		break;

	case rdma_done:
		goto out_drop;

	case rdma_error:
		goto out_drop;

	default:
		goto out_proc;
	}

	end = (__be32 *)((unsigned long)rdma_argp + rq_arg->len);
	p = xdr_check_read_list(rdma_argp + 4, end);
	if (!p)
		goto out_inval;
	p = xdr_check_write_list(p, end);
	if (!p)
		goto out_inval;
	p = xdr_check_reply_chunk(p, end);
	if (!p)
		goto out_inval;
	if (p > end)
		goto out_inval;

	rq_arg->head[0].iov_base = p;
	hdr_len = (unsigned long)p - (unsigned long)rdma_argp;
	rq_arg->head[0].iov_len -= hdr_len;
	rq_arg->len -= hdr_len;
	trace_svcrdma_decode_rqst(rdma_argp, hdr_len);
	return hdr_len;

out_short:
	trace_svcrdma_decode_short(rq_arg->len);
	return -EINVAL;

out_version:
	trace_svcrdma_decode_badvers(rdma_argp);
	return -EPROTONOSUPPORT;

out_drop:
	trace_svcrdma_decode_drop(rdma_argp);
	return 0;

out_proc:
	trace_svcrdma_decode_badproc(rdma_argp);
	return -EINVAL;

out_inval:
	trace_svcrdma_decode_parse(rdma_argp);
	return -EINVAL;
}