Merge tag 'nfs-for-4.4-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

[firefly-linux-kernel-4.4.55.git] / net / sunrpc / xprtrdma / svc_rdma_transport.c

diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index a266e870d870e8b2cf0d938c3009460b46fddc7b..b348b4adef29a48246709cc7f32cf576865753eb 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -56,6 +56,7 @@
 
 #define RPCDBG_FACILITY        RPCDBG_SVCXPRT
 
+static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *, int);
 static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
                                        struct net *net,
                                        struct sockaddr *sa, int salen,
@@ -95,6 +96,63 @@ struct svc_xprt_class svc_rdma_class = {
        .xcl_ident = XPRT_TRANSPORT_RDMA,
 };
 
+#if defined(CONFIG_SUNRPC_BACKCHANNEL)
+static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *, struct net *,
+                                          struct sockaddr *, int, int);
+static void svc_rdma_bc_detach(struct svc_xprt *);
+static void svc_rdma_bc_free(struct svc_xprt *);
+
+static struct svc_xprt_ops svc_rdma_bc_ops = {
+       .xpo_create = svc_rdma_bc_create,
+       .xpo_detach = svc_rdma_bc_detach,
+       .xpo_free = svc_rdma_bc_free,
+       .xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr,
+       .xpo_secure_port = svc_rdma_secure_port,
+};
+
+struct svc_xprt_class svc_rdma_bc_class = {
+       .xcl_name = "rdma-bc",
+       .xcl_owner = THIS_MODULE,
+       .xcl_ops = &svc_rdma_bc_ops,
+       .xcl_max_payload = (1024 - RPCRDMA_HDRLEN_MIN)
+};
+
+static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *serv,
+                                          struct net *net,
+                                          struct sockaddr *sa, int salen,
+                                          int flags)
+{
+       struct svcxprt_rdma *cma_xprt;
+       struct svc_xprt *xprt;
+
+       cma_xprt = rdma_create_xprt(serv, 0);
+       if (!cma_xprt)
+               return ERR_PTR(-ENOMEM);
+       xprt = &cma_xprt->sc_xprt;
+
+       svc_xprt_init(net, &svc_rdma_bc_class, xprt, serv);
+       serv->sv_bc_xprt = xprt;
+
+       dprintk("svcrdma: %s(%p)\n", __func__, xprt);
+       return xprt;
+}
+
+static void svc_rdma_bc_detach(struct svc_xprt *xprt)
+{
+       dprintk("svcrdma: %s(%p)\n", __func__, xprt);
+}
+
+static void svc_rdma_bc_free(struct svc_xprt *xprt)
+{
+       struct svcxprt_rdma *rdma =
+               container_of(xprt, struct svcxprt_rdma, sc_xprt);
+
+       dprintk("svcrdma: %s(%p)\n", __func__, xprt);
+       if (xprt)
+               kfree(rdma);
+}
+#endif /* CONFIG_SUNRPC_BACKCHANNEL */
+
 struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt)
 {
        struct svc_rdma_op_ctxt *ctxt;