librdmacm/rdma_client: add new client sample

Provide a very simple client application that shows the
minimal coding needed to establish a connection and exchange
messages with a server.  The client makes use of the new
rdma_getaddrinfo and rdma_create_ep calls, plus rdma verbs
abstractions.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>

diff --git a/Makefile.am b/Makefile.am
index 8aef24a5de5b195459b86991fc87c11004053f22..6071599d7e2d6f12bd6ee25b7a43cc67400d45ce 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -17,7 +17,8 @@ src_librdmacm_la_LDFLAGS = -version-info 1 -export-dynamic \
                           $(librdmacm_version_script)
 src_librdmacm_la_DEPENDENCIES =  $(srcdir)/src/librdmacm.map
 
-bin_PROGRAMS = examples/ucmatose examples/rping examples/udaddy examples/mckey
+bin_PROGRAMS = examples/ucmatose examples/rping examples/udaddy examples/mckey \
+              examples/rdma_client
 examples_ucmatose_SOURCES = examples/cmatose.c
 examples_ucmatose_LDADD = $(top_builddir)/src/librdmacm.la
 examples_rping_SOURCES = examples/rping.c
@@ -26,6 +27,8 @@ examples_udaddy_SOURCES = examples/udaddy.c
 examples_udaddy_LDADD = $(top_builddir)/src/librdmacm.la
 examples_mckey_SOURCES = examples/mckey.c
 examples_mckey_LDADD = $(top_builddir)/src/librdmacm.la
+examples_rdma_client_SOURCES = examples/rdma_client.c
+examples_rdma_client_LDADD = $(top_builddir)/src/librdmacm.la
 
 librdmacmincludedir = $(includedir)/rdma $(includedir)/infiniband
 

diff --git a/examples/rdma_client.c b/examples/rdma_client.c
new file mode 100644 (file)
index 0000000..7a59d97
--- /dev/null
+++ b/examples/rdma_client.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2010 Intel Corporation.  All rights reserved.
+ *
+ * This software is available to you under the OpenIB.org BSD license
+ * below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AWV
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <getopt.h>
+#include <rdma/rdma_cma.h>
+#include <rdma/rdma_verbs.h>
+
+static char *server = "127.0.0.1";
+static char *port = "7471";
+
+struct rdma_cm_id *id;
+struct ibv_mr *mr;
+uint8_t send_msg[16];
+uint8_t recv_msg[16];
+
+static int run(void)
+{
+       struct rdma_addrinfo hints, *res;
+       struct ibv_qp_init_attr attr;
+       struct ibv_wc wc;
+       int ret;
+
+       memset(&hints, 0, sizeof hints);
+       hints.ai_port_space = RDMA_PS_TCP;
+       ret = rdma_getaddrinfo(server, port, &hints, &res);
+       if (ret) {
+               printf("rdma_getaddrinfo %d\n", errno);
+               return ret;
+       }
+
+       memset(&attr, 0, sizeof attr);
+       attr.cap.max_send_wr = attr.cap.max_recv_wr = 1;
+       attr.cap.max_send_sge = attr.cap.max_recv_sge = 1;
+       attr.cap.max_inline_data = 16;
+       attr.qp_context = id;
+       attr.sq_sig_all = 1;
+       ret = rdma_create_ep(&id, res, NULL, &attr);
+       rdma_freeaddrinfo(res);
+       if (ret) {
+               printf("rdma_create_ep %d\n", errno);
+               return ret;
+       }
+
+       mr = rdma_reg_msgs(id, recv_msg, 16);
+       if (!mr) {
+               printf("rdma_reg_msgs %d\n", errno);
+               return ret;
+       }
+
+       ret = rdma_post_recv(id, NULL, recv_msg, 16, mr);
+       if (ret) {
+               printf("rdma_post_recv %d\n", errno);
+               return ret;
+       }
+
+       ret = rdma_connect(id, NULL);
+       if (ret) {
+               printf("rdma_connect %d\n", errno);
+               return ret;
+       }
+
+       ret = rdma_post_send(id, NULL, send_msg, 16, NULL, IBV_SEND_INLINE);
+       if (ret) {
+               printf("rdma_post_send %d\n", errno);
+               return ret;
+       }
+
+       ret = rdma_get_recv_comp(id, &wc);
+       if (ret <= 0) {
+               printf("rdma_get_recv_comp %d\n", ret);
+               return ret;
+       }
+
+       rdma_disconnect(id);
+       rdma_dereg_mr(mr);
+       rdma_destroy_ep(id);
+       return 0;
+}
+
+int main(int argc, char **argv)
+{
+       int op, ret;
+
+       while ((op = getopt(argc, argv, "s:p:")) != -1) {
+               switch (op) {
+               case 's':
+                       server = optarg;
+                       break;
+               case 'p':
+                       port = optarg;
+                       break;
+               default:
+                       printf("usage: %s\n", argv[0]);
+                       printf("\t[-s server_address]\n");
+                       printf("\t[-p port_number]\n");
+                       exit(1);
+               }
+       }
+
+       printf("rdma_client: start\n");
+       ret = run();
+       printf("rdma_client: end %d\n", ret);
+       return ret;
+}