diff options
Diffstat (limited to 'net/sunrpc/bc_svc.c')
| -rw-r--r-- | net/sunrpc/bc_svc.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/net/sunrpc/bc_svc.c b/net/sunrpc/bc_svc.c new file mode 100644 index 000000000000..13f214f53120 --- /dev/null +++ b/net/sunrpc/bc_svc.c @@ -0,0 +1,81 @@ +/****************************************************************************** + +(c) 2007 Network Appliance, Inc. All Rights Reserved. +(c) 2009 NetApp. All Rights Reserved. + +NetApp provides this source code under the GPL v2 License. +The GPL v2 license is available at +http://opensource.org/licenses/gpl-license.php. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR +CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +******************************************************************************/ + +/* + * The NFSv4.1 callback service helper routines. + * They implement the transport level processing required to send the + * reply over an existing open connection previously established by the client. + */ + +#if defined(CONFIG_NFS_V4_1) + +#include <linux/module.h> + +#include <linux/sunrpc/xprt.h> +#include <linux/sunrpc/sched.h> +#include <linux/sunrpc/bc_xprt.h> + +#define RPCDBG_FACILITY RPCDBG_SVCDSP + +void bc_release_request(struct rpc_task *task) +{ + struct rpc_rqst *req = task->tk_rqstp; + + dprintk("RPC: bc_release_request: task= %p\n", task); + + /* + * Release this request only if it's a backchannel + * preallocated request + */ + if (!bc_prealloc(req)) + return; + xprt_free_bc_request(req); +} + +/* Empty callback ops */ +static const struct rpc_call_ops nfs41_callback_ops = { +}; + + +/* + * Send the callback reply + */ +int bc_send(struct rpc_rqst *req) +{ + struct rpc_task *task; + int ret; + + dprintk("RPC: bc_send req= %p\n", req); + task = rpc_run_bc_task(req, &nfs41_callback_ops); + if (IS_ERR(task)) + ret = PTR_ERR(task); + else { + BUG_ON(atomic_read(&task->tk_count) != 1); + ret = task->tk_status; + rpc_put_task(task); + } + return ret; + dprintk("RPC: bc_send ret= %d \n", ret); +} + +#endif /* CONFIG_NFS_V4_1 */ |