Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / sunrpc / bc_xprt.h

diff --git a/kernel/include/linux/sunrpc/bc_xprt.h b/kernel/include/linux/sunrpc/bc_xprt.h
new file mode 100644 (file)
index 0000000..2ca67b5
--- /dev/null
+++ b/kernel/include/linux/sunrpc/bc_xprt.h
@@ -0,0 +1,68 @@
+/******************************************************************************
+
+(c) 2008 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.
+
+******************************************************************************/
+
+/*
+ * Functions to create and manage the backchannel
+ */
+
+#ifndef _LINUX_SUNRPC_BC_XPRT_H
+#define _LINUX_SUNRPC_BC_XPRT_H
+
+#include <linux/sunrpc/svcsock.h>
+#include <linux/sunrpc/xprt.h>
+#include <linux/sunrpc/sched.h>
+
+#ifdef CONFIG_SUNRPC_BACKCHANNEL
+struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid);
+void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied);
+void xprt_free_bc_request(struct rpc_rqst *req);
+int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs);
+void xprt_destroy_backchannel(struct rpc_xprt *, unsigned int max_reqs);
+int bc_send(struct rpc_rqst *req);
+
+/*
+ * Determine if a shared backchannel is in use
+ */
+static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
+{
+       if (rqstp->rq_server->sv_bc_xprt)
+               return 1;
+       return 0;
+}
+#else /* CONFIG_SUNRPC_BACKCHANNEL */
+static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
+                                        unsigned int min_reqs)
+{
+       return 0;
+}
+
+static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
+{
+       return 0;
+}
+
+static inline void xprt_free_bc_request(struct rpc_rqst *req)
+{
+}
+#endif /* CONFIG_SUNRPC_BACKCHANNEL */
+#endif /* _LINUX_SUNRPC_BC_XPRT_H */
+