bc_svc.c revision 9e00abc3c20904fd6a5d888bb7023925799ec8a5 
1/******************************************************************************
2
3(c) 2007 Network Appliance, Inc.  All Rights Reserved.
4(c) 2009 NetApp.  All Rights Reserved.
5
6NetApp provides this source code under the GPL v2 License.
7The GPL v2 license is available at
8http://opensource.org/licenses/gpl-license.php.
9
10THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
11"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
12LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
13A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
14CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
15EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
16PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
17PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
18LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
19NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
20SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21
22******************************************************************************/
23
24/*
25 * The NFSv4.1 callback service helper routines.
26 * They implement the transport level processing required to send the
27 * reply over an existing open connection previously established by the client.
28 */
29
30#include <linux/module.h>
31
32#include <linux/sunrpc/xprt.h>
33#include <linux/sunrpc/sched.h>
34#include <linux/sunrpc/bc_xprt.h>
35
36#define RPCDBG_FACILITY	RPCDBG_SVCDSP
37
38/* Empty callback ops */
39static const struct rpc_call_ops nfs41_callback_ops = {
40};
41
42
43/*
44 * Send the callback reply
45 */
46int bc_send(struct rpc_rqst *req)
47{
48	struct rpc_task *task;
49	int ret;
50
51	dprintk("RPC:       bc_send req= %p\n", req);
52	task = rpc_run_bc_task(req, &nfs41_callback_ops);
53	if (IS_ERR(task))
54		ret = PTR_ERR(task);
55	else {
56		BUG_ON(atomic_read(&task->tk_count) != 1);
57		ret = task->tk_status;
58		rpc_put_task(task);
59	}
60	dprintk("RPC:       bc_send ret= %d\n", ret);
61	return ret;
62}
63
64