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 <[email protected]> --- Makefile.am | 5 +- examples/rdma_client.c | 134 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 138 insertions(+), 1 deletions(-) diff --git a/Makefile.am b/Makefile.am index 8aef24a..6071599 100644 --- 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 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; +} -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
