Fix vitastor-nfs build without RDMA

src/nfs/nfs_proxy.cpp

@@ -72,12 +72,14 @@ static const char* help_text =
     "  --port <PORT>         use port <PORT> for NFS services (default is 2049)\n"
     "                        specify \"auto\" to auto-select and print port\n"
     "  --portmap 0           do not listen on port 111 (portmap/rpcbind, requires root)\n"
+#ifdef WITH_RDMACM
     "  --nfs_rdma <PORT>     enable NFS-RDMA at RDMA-CM port <PORT> (you can try 20049)\n"
     "                        if RDMA is enabled and --port is set to 0, TCP will be disabled\n"
     "  --nfs_rdma_credit 16  maximum operation credit for RDMA clients (max iodepth)\n"
     "  --nfs_rdma_send 1024  maximum RDMA send operation count (should be larger than iodepth)\n"
     "  --nfs_rdma_alloc 1M   RDMA memory allocation rounding\n"
     "  --nfs_rdma_gc 64M     maximum unused RDMA buffers\n"
+#endif
     "\n"
     "vitastor-nfs --fs <NAME> upgrade\n"
     "  Upgrade FS metadata. Can be run online, but server(s) should be restarted\n"
@@ -205,12 +207,15 @@ void nfs_proxy_t::run(json11::Json cfg)
     default_pool = cfg["pool"].as_string();
     portmap_enabled = !json_is_false(cfg["portmap"]);
     nfs_port = cfg["port"].uint64_value() & 0xffff;
+#ifdef WITH_RDMACM
     nfs_rdma_port = cfg["nfs_rdma"].uint64_value() & 0xffff;
+#endif
     // Allow RDMA-only mode if port is explicitly set to 0
     // Allow port auto-selection in server mode if explicitly set to --port auto
     nfs_port_auto = cfg["port"] == "auto";
     if (!nfs_port)
         nfs_port = nfs_port_auto ? 0 : (!cfg["port"].is_null() && nfs_rdma_port ? -1 : 2049);
+#ifdef WITH_RDMACM
     nfs_rdma_credit = cfg["nfs_rdma_credit"].uint64_value();
     if (!nfs_rdma_credit)
         nfs_rdma_credit = 16;
@@ -223,6 +228,7 @@ void nfs_proxy_t::run(json11::Json cfg)
     nfs_rdma_gc = cfg["nfs_rdma_gc"].uint64_value();
     if (!nfs_rdma_gc)
         nfs_rdma_gc = 64*1048576;
+#endif
     export_root = cfg["nfspath"].string_value();
     if (!export_root.size())
         export_root = "/";
@@ -391,10 +397,12 @@ void nfs_proxy_t::run_server(json11::Json cfg)
             }
         });
     }
+#ifdef WITH_RDMACM
     if (nfs_rdma_port)
     {
         rdma_context = create_rdma(bind_address, nfs_rdma_port, nfs_rdma_credit, nfs_rdma_max_send, nfs_rdma_alloc, nfs_rdma_gc);
     }
+#endif
     if (mountpoint != "")
     {
         mount_fs();