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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/net/sunrpc/bc_svc.c
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/******************************************************************************

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(c) 2007 Network Appliance, Inc.  All Rights Reserved.

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(c) 2009 NetApp.  All Rights Reserved.

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NetApp provides this source code under the GPL v2 License.

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The GPL v2 license is available at

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http://opensource.org/licenses/gpl-license.php.

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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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******************************************************************************/

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/*

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 * The NFSv4.1 callback service helper routines.

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 * They implement the transport level processing required to send the

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 * reply over an existing open connection previously established by the client.

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 */

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#if defined(CONFIG_NFS_V4_1)

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#include <linux/module.h>

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#include <linux/sunrpc/xprt.h>

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#include <linux/sunrpc/sched.h>

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#include <linux/sunrpc/bc_xprt.h>

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#define RPCDBG_FACILITY	RPCDBG_SVCDSP

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/* Empty callback ops */

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static const struct rpc_call_ops nfs41_callback_ops = {

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};

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/*

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 * Send the callback reply

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 */

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int bc_send(struct rpc_rqst *req)

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{

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	struct rpc_task *task;

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	int ret;

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	dprintk("RPC:       bc_send req= %p\n", req);

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	task = rpc_run_bc_task(req, &nfs41_callback_ops);

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	if (IS_ERR(task))

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		ret = PTR_ERR(task);

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	else {

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		BUG_ON(atomic_read(&task->tk_count) != 1);

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		ret = task->tk_status;

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		rpc_put_task(task);

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	}

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	dprintk("RPC:       bc_send ret= %d\n", ret);

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	return ret;

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}

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#endif /* CONFIG_NFS_V4_1 */

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