librdmacm/examples/mckey.c - linux-rdma/rdma-core - Git at Google

 /*
  * Copyright (c) 2005-2007 Intel Corporation.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
  * General Public License (GPL) Version 2, available from the file
  * COPYING in the main directory of this source tree, or 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 AND
  * 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.
  *
  * $Id$
  */

 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <errno.h>
 #include <sys/types.h>
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <netdb.h>
 #include <unistd.h>
 #include <getopt.h>

 #include <rdma/rdma_cma.h>
 #include <infiniband/ib.h>

 #include "common.h"

 struct cmatest_node {
 	int			id;
 	struct rdma_cm_id	*cma_id;
 	int			connected;
 	struct ibv_pd		*pd;
 	struct ibv_cq		*cq;
 	struct ibv_mr		*mr;
 	struct ibv_ah		*ah;
 	uint32_t		remote_qpn;
 	uint32_t		remote_qkey;
 	void			*mem;
 };

 struct cmatest {
 	struct rdma_event_channel *channel;
 	pthread_t 		cmathread;
 	struct cmatest_node	*nodes;
 	int			conn_index;
 	int			connects_left;

 	struct sockaddr_storage	dst_in;
 	struct sockaddr		*dst_addr;
 	struct sockaddr_storage	src_in;
 	struct sockaddr		*src_addr;
 };

 static struct cmatest test;
 static int connections = 1;
 static int message_size = 100;
 static int message_count = 10;
 static int is_sender;
 static int send_only;
 static int loopback = 1;
 static int unmapped_addr;
 static char *dst_addr;
 static char *src_addr;
 static enum rdma_port_space port_space = RDMA_PS_UDP;

 static int create_message(struct cmatest_node *node)
 {
 	if (!message_size)
 		message_count = 0;

 	if (!message_count)
 		return 0;

 	node->mem = malloc(message_size + sizeof(struct ibv_grh));
 	if (!node->mem) {
 		printf("failed message allocation\n");
 		return -1;
 	}
 	node->mr = ibv_reg_mr(node->pd, node->mem,
 			      message_size + sizeof(struct ibv_grh),
 			      IBV_ACCESS_LOCAL_WRITE);
 	if (!node->mr) {
 		printf("failed to reg MR\n");
 		goto err;
 	}
 	return 0;
 err:
 	free(node->mem);
 	return -1;
 }

 static int verify_test_params(struct cmatest_node *node)
 {
 	struct ibv_port_attr port_attr;
 	int ret;

 	ret = ibv_query_port(node->cma_id->verbs, node->cma_id->port_num,
 			     &port_attr);
 	if (ret)
 		return ret;

 	if (message_count && message_size > (1 << (port_attr.active_mtu + 7))) {
 		printf("mckey: message_size %d is larger than active mtu %d\n",
 		       message_size, 1 << (port_attr.active_mtu + 7));
 		return -EINVAL;
 	}

 	return 0;
 }

 static int init_node(struct cmatest_node *node)
 {
 	struct ibv_qp_init_attr_ex init_qp_attr_ex;
 	struct ibv_qp_init_attr init_qp_attr;
 	int cqe, ret = 0;

 	node->pd = ibv_alloc_pd(node->cma_id->verbs);
 	if (!node->pd) {
 		ret = -ENOMEM;
 		printf("mckey: unable to allocate PD\n");
 		goto out;
 	}

 	cqe = message_count ? message_count * 2 : 2;
 	node->cq = ibv_create_cq(node->cma_id->verbs, cqe, node, NULL, 0);
 	if (!node->cq) {
 		ret = -ENOMEM;
 		printf("mckey: unable to create CQ\n");
 		goto out;
 	}

 	memset(&init_qp_attr, 0, sizeof init_qp_attr);
 	init_qp_attr.cap.max_send_wr = message_count ? message_count : 1;
 	init_qp_attr.cap.max_recv_wr = message_count ? message_count : 1;
 	init_qp_attr.cap.max_send_sge = 1;
 	init_qp_attr.cap.max_recv_sge = 1;
 	init_qp_attr.qp_context = node;
 	init_qp_attr.sq_sig_all = 0;
 	init_qp_attr.qp_type = IBV_QPT_UD;
 	init_qp_attr.send_cq = node->cq;
 	init_qp_attr.recv_cq = node->cq;

 	if (!loopback) {
 		memset(&init_qp_attr_ex, 0, sizeof(init_qp_attr_ex));
 		init_qp_attr_ex.cap.max_send_wr = message_count ? message_count : 1;
 		init_qp_attr_ex.cap.max_recv_wr = message_count ? message_count : 1;
 		init_qp_attr_ex.cap.max_send_sge = 1;
 		init_qp_attr_ex.cap.max_recv_sge = 1;
 		init_qp_attr_ex.qp_context = node;
 		init_qp_attr_ex.sq_sig_all = 0;
 		init_qp_attr_ex.qp_type = IBV_QPT_UD;
 		init_qp_attr_ex.send_cq = node->cq;
 		init_qp_attr_ex.recv_cq = node->cq;

 		init_qp_attr_ex.comp_mask = IBV_QP_INIT_ATTR_CREATE_FLAGS|IBV_QP_INIT_ATTR_PD;
 		init_qp_attr_ex.pd = node->pd;
 		init_qp_attr_ex.create_flags = IBV_QP_CREATE_BLOCK_SELF_MCAST_LB;

 		ret = rdma_create_qp_ex(node->cma_id, &init_qp_attr_ex);
 	} else {
 		ret = rdma_create_qp(node->cma_id, node->pd, &init_qp_attr);
 	}

 	if (ret) {
 		perror("mckey: unable to create QP");
 		goto out;
 	}

 	ret = create_message(node);
 	if (ret) {
 		printf("mckey: failed to create messages: %d\n", ret);
 		goto out;
 	}
 out:
 	return ret;
 }

 static int post_recvs(struct cmatest_node *node)
 {
 	struct ibv_recv_wr recv_wr, *recv_failure;
 	struct ibv_sge sge;
 	int i, ret = 0;

 	if (!message_count)
 		return 0;

 	recv_wr.next = NULL;
 	recv_wr.sg_list = &sge;
 	recv_wr.num_sge = 1;
 	recv_wr.wr_id = (uintptr_t) node;

 	sge.length = message_size + sizeof(struct ibv_grh);
 	sge.lkey = node->mr->lkey;
 	sge.addr = (uintptr_t) node->mem;

 	for (i = 0; i < message_count && !ret; i++ ) {
 		ret = ibv_post_recv(node->cma_id->qp, &recv_wr, &recv_failure);
 		if (ret) {
 			printf("failed to post receives: %d\n", ret);
 			break;
 		}
 	}
 	return ret;
 }

 static int post_sends(struct cmatest_node *node, int signal_flag)
 {
 	struct ibv_send_wr send_wr, *bad_send_wr;
 	struct ibv_sge sge;
 	int i, ret = 0;

 	if (!node->connected || !message_count)
 		return 0;

 	send_wr.next = NULL;
 	send_wr.sg_list = &sge;
 	send_wr.num_sge = 1;
 	send_wr.opcode = IBV_WR_SEND_WITH_IMM;
 	send_wr.send_flags = signal_flag;
 	send_wr.wr_id = (unsigned long)node;
 	send_wr.imm_data = htobe32(node->cma_id->qp->qp_num);

 	send_wr.wr.ud.ah = node->ah;
 	send_wr.wr.ud.remote_qpn = node->remote_qpn;
 	send_wr.wr.ud.remote_qkey = node->remote_qkey;

 	sge.length = message_size;
 	sge.lkey = node->mr->lkey;
 	sge.addr = (uintptr_t) node->mem;

 	for (i = 0; i < message_count && !ret; i++) {
 		ret = ibv_post_send(node->cma_id->qp, &send_wr, &bad_send_wr);
 		if (ret)
 			printf("failed to post sends: %d\n", ret);
 	}
 	return ret;
 }

 static void connect_error(void)
 {
 	test.connects_left--;
 }

 static int addr_handler(struct cmatest_node *node)
 {
 	int ret;
 	struct rdma_cm_join_mc_attr_ex mc_attr;

 	ret = verify_test_params(node);
 	if (ret)
 		goto err;

 	ret = init_node(node);
 	if (ret)
 		goto err;

 	if (!is_sender) {
 		ret = post_recvs(node);
 		if (ret)
 			goto err;
 	}

 	mc_attr.comp_mask =
 	    RDMA_CM_JOIN_MC_ATTR_ADDRESS | RDMA_CM_JOIN_MC_ATTR_JOIN_FLAGS;
 	mc_attr.addr = test.dst_addr;
 	mc_attr.join_flags = send_only ? RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER
 				       : RDMA_MC_JOIN_FLAG_FULLMEMBER;

 	ret = rdma_join_multicast_ex(node->cma_id, &mc_attr, node);

 	if (ret) {
 		perror("mckey: failure joining");
 		goto err;
 	}
 	return 0;
 err:
 	connect_error();
 	return ret;
 }

 static int join_handler(struct cmatest_node *node,
 			struct rdma_ud_param *param)
 {
 	char buf[40];

 	inet_ntop(AF_INET6, param->ah_attr.grh.dgid.raw, buf, 40);
 	printf("mckey: joined dgid: %s mlid 0x%x sl %d\n", buf,
 		param->ah_attr.dlid, param->ah_attr.sl);

 	node->remote_qpn = param->qp_num;
 	node->remote_qkey = param->qkey;
 	node->ah = ibv_create_ah(node->pd, &param->ah_attr);
 	if (!node->ah) {
 		printf("mckey: failure creating address handle\n");
 		goto err;
 	}

 	node->connected = 1;
 	test.connects_left--;
 	return 0;
 err:
 	connect_error();
 	return -1;
 }

 static int cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
 {
 	int ret = 0;

 	switch (event->event) {
 	case RDMA_CM_EVENT_ADDR_RESOLVED:
 		ret = addr_handler(cma_id->context);
 		break;
 	case RDMA_CM_EVENT_MULTICAST_JOIN:
 		ret = join_handler(cma_id->context, &event->param.ud);
 		break;
 	case RDMA_CM_EVENT_ADDR_ERROR:
 	case RDMA_CM_EVENT_ROUTE_ERROR:
 	case RDMA_CM_EVENT_MULTICAST_ERROR:
 		printf("mckey: event: %s, error: %d\n",
 		       rdma_event_str(event->event), event->status);
 		connect_error();
 		ret = event->status;
 		break;
 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
 		/* Cleanup will occur after test completes. */
 		break;
 	default:
 		break;
 	}
 	return ret;
 }

 static void *cma_thread(void *arg)
 {
 	struct rdma_cm_event *event;
 	int ret;

 	while (1) {
 		ret = rdma_get_cm_event(test.channel, &event);
 		if (ret) {
 			perror("rdma_get_cm_event");
 			break;
 		}

 		switch (event->event) {
 		case RDMA_CM_EVENT_MULTICAST_ERROR:
 		case RDMA_CM_EVENT_ADDR_CHANGE:
 			printf("mckey: event: %s, status: %d\n",
 			       rdma_event_str(event->event), event->status);
 			break;
 		default:
 			break;
 		}

 		rdma_ack_cm_event(event);
 	}
 	return NULL;
 }

 static void destroy_node(struct cmatest_node *node)
 {
 	if (!node->cma_id)
 		return;

 	if (node->ah)
 		ibv_destroy_ah(node->ah);

 	if (node->cma_id->qp)
 		rdma_destroy_qp(node->cma_id);

 	if (node->cq)
 		ibv_destroy_cq(node->cq);

 	if (node->mem) {
 		ibv_dereg_mr(node->mr);
 		free(node->mem);
 	}

 	if (node->pd)
 		ibv_dealloc_pd(node->pd);

 	/* Destroy the RDMA ID after all device resources */
 	rdma_destroy_id(node->cma_id);
 }

 static int alloc_nodes(void)
 {
 	int ret, i;

 	test.nodes = malloc(sizeof *test.nodes * connections);
 	if (!test.nodes) {
 		printf("mckey: unable to allocate memory for test nodes\n");
 		return -ENOMEM;
 	}
 	memset(test.nodes, 0, sizeof *test.nodes * connections);

 	for (i = 0; i < connections; i++) {
 		test.nodes[i].id = i;
 		ret = rdma_create_id(test.channel, &test.nodes[i].cma_id,
 				     &test.nodes[i], port_space);
 		if (ret)
 			goto err;
 	}
 	return 0;
 err:
 	while (--i >= 0)
 		rdma_destroy_id(test.nodes[i].cma_id);
 	free(test.nodes);
 	return ret;
 }

 static void destroy_nodes(void)
 {
 	int i;

 	for (i = 0; i < connections; i++)
 		destroy_node(&test.nodes[i]);
 	free(test.nodes);
 }

 static int poll_cqs(void)
 {
 	struct ibv_wc wc[8];
 	int done, i, ret;

 	for (i = 0; i < connections; i++) {
 		if (!test.nodes[i].connected)
 			continue;

 		for (done = 0; done < message_count; done += ret) {
 			ret = ibv_poll_cq(test.nodes[i].cq, 8, wc);
 			if (ret < 0) {
 				printf("mckey: failed polling CQ: %d\n", ret);
 				return ret;
 			}
 		}
 	}
 	return 0;
 }

 static int connect_events(void)
 {
 	struct rdma_cm_event *event;
 	int ret = 0;

 	while (test.connects_left && !ret) {
 		ret = rdma_get_cm_event(test.channel, &event);
 		if (!ret) {
 			ret = cma_handler(event->id, event);
 			rdma_ack_cm_event(event);
 		}
 	}
 	return ret;
 }

 static int get_addr(char *dst, struct sockaddr *addr)
 {
 	struct addrinfo *res;
 	int ret;

 	ret = getaddrinfo(dst, NULL, NULL, &res);
 	if (ret) {
 		printf("getaddrinfo failed (%s) - invalid hostname or IP address\n", gai_strerror(ret));
 		return ret;
 	}

 	memcpy(addr, res->ai_addr, res->ai_addrlen);
 	freeaddrinfo(res);
 	return ret;
 }

 static int get_dst_addr(char *dst, struct sockaddr *addr)
 {
 	struct sockaddr_ib *sib;

 	if (!unmapped_addr)
 		return get_addr(dst, addr);

 	sib = (struct sockaddr_ib *) addr;
 	memset(sib, 0, sizeof *sib);
 	sib->sib_family = AF_IB;
 	inet_pton(AF_INET6, dst, &sib->sib_addr);
 	return 0;
 }

 static int run(void)
 {
 	int i, ret;

 	printf("mckey: starting %s\n", is_sender ? "client" : "server");
 	if (src_addr) {
 		ret = get_addr(src_addr, (struct sockaddr *) &test.src_in);
 		if (ret)
 			return ret;
 	}

 	ret = get_dst_addr(dst_addr, (struct sockaddr *) &test.dst_in);
 	if (ret)
 		return ret;

 	printf("mckey: joining\n");
 	for (i = 0; i < connections; i++) {
 		if (src_addr) {
 			ret = rdma_bind_addr(test.nodes[i].cma_id,
 					     test.src_addr);
 			if (ret) {
 				perror("mckey: addr bind failure");
 				connect_error();
 				return ret;
 			}
 		}

 		if (unmapped_addr)
 			ret = addr_handler(&test.nodes[i]);
 		else
 			ret = rdma_resolve_addr(test.nodes[i].cma_id,
 						test.src_addr, test.dst_addr,
 						2000);
 		if (ret) {
 			perror("mckey: resolve addr failure");
 			connect_error();
 			return ret;
 		}
 	}

 	ret = connect_events();
 	if (ret)
 		goto out;

 	pthread_create(&test.cmathread, NULL, cma_thread, NULL);

 	/*
 	 * Pause to give SM chance to configure switches.  We don't want to
 	 * handle reliability issue in this simple test program.
 	 */
 	sleep(3);

 	if (message_count) {
 		if (is_sender) {
 			printf("initiating data transfers\n");
 			for (i = 0; i < connections; i++) {
 				ret = post_sends(&test.nodes[i], 0);
 				if (ret)
 					goto out;
 			}
 		} else {
 			printf("receiving data transfers\n");
 			ret = poll_cqs();
 			if (ret)
 				goto out;
 		}
 		printf("data transfers complete\n");
 	}
 out:
 	for (i = 0; i < connections; i++) {
 		ret = rdma_leave_multicast(test.nodes[i].cma_id,
 					   test.dst_addr);
 		if (ret)
 			perror("mckey: failure leaving");
 	}
 	return ret;
 }

 int main(int argc, char **argv)
 {
 	int op, ret;

 	while ((op = getopt(argc, argv, "m:M:sb:c:C:S:p:ol")) != -1) {
 		switch (op) {
 		case 'm':
 			dst_addr = optarg;
 			break;
 		case 'M':
 			unmapped_addr = 1;
 			dst_addr = optarg;
 			break;
 		case 's':
 			is_sender = 1;
 			break;
 		case 'b':
 			src_addr = optarg;
 			test.src_addr = (struct sockaddr *) &test.src_in;
 			break;
 		case 'c':
 			connections = atoi(optarg);
 			break;
 		case 'C':
 			message_count = atoi(optarg);
 			break;
 		case 'S':
 			message_size = atoi(optarg);
 			break;
 		case 'p':
 			port_space = strtol(optarg, NULL, 0);
 			break;
 		case 'o':
 			send_only = 1;
 			break;
 		case 'l':
 			loopback = 0;
 			break;

 		default:
 			printf("usage: %s\n", argv[0]);
 			printf("\t-m multicast_address\n");
 			printf("\t[-M unmapped_multicast_address]\n"
 			       "\t replaces -m and requires -b\n");
 			printf("\t[-s(ender)]\n");
 			printf("\t[-b bind_address]\n");
 			printf("\t[-c connections]\n");
 			printf("\t[-C message_count]\n");
 			printf("\t[-S message_size]\n");
 			printf("\t[-p port_space - %#x for UDP (default), "
 			       "%#x for IPOIB]\n", RDMA_PS_UDP, RDMA_PS_IPOIB);
 			printf("\t[-o join as a send-only full-member]\n");
 			printf("\t[-l join without multicast loopback]\n");
 			exit(1);
 		}
 	}

 	if (unmapped_addr && !src_addr) {
 		printf("unmapped multicast address requires binding "
 			"to source address\n");
 		exit(1);
 	}

 	test.dst_addr = (struct sockaddr *) &test.dst_in;
 	test.connects_left = connections;

 	test.channel = create_event_channel();
 	if (!test.channel) {
 		exit(1);
 	}

 	if (alloc_nodes())
 		exit(1);

 	ret = run();

 	printf("test complete\n");
 	destroy_nodes();
 	rdma_destroy_event_channel(test.channel);

 	printf("return status %d\n", ret);
 	return ret;
 }
	/*
	* Copyright (c) 2005-2007 Intel Corporation. All rights reserved.
	*
	* This software is available to you under a choice of one of two
	* licenses. You may choose to be licensed under the terms of the GNU
	* General Public License (GPL) Version 2, available from the file
	* COPYING in the main directory of this source tree, or 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 AND
	* 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.
	*
	* $Id$
	*/

	#include <stdlib.h>
	#include <string.h>
	#include <stdio.h>
	#include <errno.h>
	#include <sys/types.h>
	#include <arpa/inet.h>
	#include <sys/socket.h>
	#include <netdb.h>
	#include <unistd.h>
	#include <getopt.h>

	#include <rdma/rdma_cma.h>
	#include <infiniband/ib.h>

	#include "common.h"

	struct cmatest_node {
	int id;
	struct rdma_cm_id *cma_id;
	int connected;
	struct ibv_pd *pd;
	struct ibv_cq *cq;
	struct ibv_mr *mr;
	struct ibv_ah *ah;
	uint32_t remote_qpn;
	uint32_t remote_qkey;
	void *mem;
	};

	struct cmatest {
	struct rdma_event_channel *channel;
	pthread_t cmathread;
	struct cmatest_node *nodes;
	int conn_index;
	int connects_left;

	struct sockaddr_storage dst_in;
	struct sockaddr *dst_addr;
	struct sockaddr_storage src_in;
	struct sockaddr *src_addr;
	};

	static struct cmatest test;
	static int connections = 1;
	static int message_size = 100;
	static int message_count = 10;
	static int is_sender;
	static int send_only;
	static int loopback = 1;
	static int unmapped_addr;
	static char *dst_addr;
	static char *src_addr;
	static enum rdma_port_space port_space = RDMA_PS_UDP;

	static int create_message(struct cmatest_node *node)
	{
	if (!message_size)
	message_count = 0;

	if (!message_count)
	return 0;

	node->mem = malloc(message_size + sizeof(struct ibv_grh));
	if (!node->mem) {
	printf("failed message allocation\n");
	return -1;
	}
	node->mr = ibv_reg_mr(node->pd, node->mem,
	message_size + sizeof(struct ibv_grh),
	IBV_ACCESS_LOCAL_WRITE);
	if (!node->mr) {
	printf("failed to reg MR\n");
	goto err;
	}
	return 0;
	err:
	free(node->mem);
	return -1;
	}

	static int verify_test_params(struct cmatest_node *node)
	{
	struct ibv_port_attr port_attr;
	int ret;

	ret = ibv_query_port(node->cma_id->verbs, node->cma_id->port_num,
	&port_attr);
	if (ret)
	return ret;

	if (message_count && message_size > (1 << (port_attr.active_mtu + 7))) {
	printf("mckey: message_size %d is larger than active mtu %d\n",
	message_size, 1 << (port_attr.active_mtu + 7));
	return -EINVAL;
	}

	return 0;
	}

	static int init_node(struct cmatest_node *node)
	{
	struct ibv_qp_init_attr_ex init_qp_attr_ex;
	struct ibv_qp_init_attr init_qp_attr;
	int cqe, ret = 0;

	node->pd = ibv_alloc_pd(node->cma_id->verbs);
	if (!node->pd) {
	ret = -ENOMEM;
	printf("mckey: unable to allocate PD\n");
	goto out;
	}

	cqe = message_count ? message_count * 2 : 2;
	node->cq = ibv_create_cq(node->cma_id->verbs, cqe, node, NULL, 0);
	if (!node->cq) {
	ret = -ENOMEM;
	printf("mckey: unable to create CQ\n");
	goto out;
	}

	memset(&init_qp_attr, 0, sizeof init_qp_attr);
	init_qp_attr.cap.max_send_wr = message_count ? message_count : 1;
	init_qp_attr.cap.max_recv_wr = message_count ? message_count : 1;
	init_qp_attr.cap.max_send_sge = 1;
	init_qp_attr.cap.max_recv_sge = 1;
	init_qp_attr.qp_context = node;
	init_qp_attr.sq_sig_all = 0;
	init_qp_attr.qp_type = IBV_QPT_UD;
	init_qp_attr.send_cq = node->cq;
	init_qp_attr.recv_cq = node->cq;

	if (!loopback) {
	memset(&init_qp_attr_ex, 0, sizeof(init_qp_attr_ex));
	init_qp_attr_ex.cap.max_send_wr = message_count ? message_count : 1;
	init_qp_attr_ex.cap.max_recv_wr = message_count ? message_count : 1;
	init_qp_attr_ex.cap.max_send_sge = 1;
	init_qp_attr_ex.cap.max_recv_sge = 1;
	init_qp_attr_ex.qp_context = node;
	init_qp_attr_ex.sq_sig_all = 0;
	init_qp_attr_ex.qp_type = IBV_QPT_UD;
	init_qp_attr_ex.send_cq = node->cq;
	init_qp_attr_ex.recv_cq = node->cq;

	init_qp_attr_ex.comp_mask = IBV_QP_INIT_ATTR_CREATE_FLAGS\|IBV_QP_INIT_ATTR_PD;
	init_qp_attr_ex.pd = node->pd;
	init_qp_attr_ex.create_flags = IBV_QP_CREATE_BLOCK_SELF_MCAST_LB;

	ret = rdma_create_qp_ex(node->cma_id, &init_qp_attr_ex);
	} else {
	ret = rdma_create_qp(node->cma_id, node->pd, &init_qp_attr);
	}

	if (ret) {
	perror("mckey: unable to create QP");
	goto out;
	}

	ret = create_message(node);
	if (ret) {
	printf("mckey: failed to create messages: %d\n", ret);
	goto out;
	}
	out:
	return ret;
	}

	static int post_recvs(struct cmatest_node *node)
	{
	struct ibv_recv_wr recv_wr, *recv_failure;
	struct ibv_sge sge;
	int i, ret = 0;

	if (!message_count)
	return 0;

	recv_wr.next = NULL;
	recv_wr.sg_list = &sge;
	recv_wr.num_sge = 1;
	recv_wr.wr_id = (uintptr_t) node;

	sge.length = message_size + sizeof(struct ibv_grh);
	sge.lkey = node->mr->lkey;
	sge.addr = (uintptr_t) node->mem;

	for (i = 0; i < message_count && !ret; i++ ) {
	ret = ibv_post_recv(node->cma_id->qp, &recv_wr, &recv_failure);
	if (ret) {
	printf("failed to post receives: %d\n", ret);
	break;
	}
	}
	return ret;
	}

	static int post_sends(struct cmatest_node *node, int signal_flag)
	{
	struct ibv_send_wr send_wr, *bad_send_wr;
	struct ibv_sge sge;
	int i, ret = 0;

	if (!node->connected \|\| !message_count)
	return 0;

	send_wr.next = NULL;
	send_wr.sg_list = &sge;
	send_wr.num_sge = 1;
	send_wr.opcode = IBV_WR_SEND_WITH_IMM;
	send_wr.send_flags = signal_flag;
	send_wr.wr_id = (unsigned long)node;
	send_wr.imm_data = htobe32(node->cma_id->qp->qp_num);

	send_wr.wr.ud.ah = node->ah;
	send_wr.wr.ud.remote_qpn = node->remote_qpn;
	send_wr.wr.ud.remote_qkey = node->remote_qkey;

	sge.length = message_size;
	sge.lkey = node->mr->lkey;
	sge.addr = (uintptr_t) node->mem;

	for (i = 0; i < message_count && !ret; i++) {
	ret = ibv_post_send(node->cma_id->qp, &send_wr, &bad_send_wr);
	if (ret)
	printf("failed to post sends: %d\n", ret);
	}
	return ret;
	}

	static void connect_error(void)
	{
	test.connects_left--;
	}

	static int addr_handler(struct cmatest_node *node)
	{
	int ret;
	struct rdma_cm_join_mc_attr_ex mc_attr;

	ret = verify_test_params(node);
	if (ret)
	goto err;

	ret = init_node(node);
	if (ret)
	goto err;

	if (!is_sender) {
	ret = post_recvs(node);
	if (ret)
	goto err;
	}

	mc_attr.comp_mask =
	RDMA_CM_JOIN_MC_ATTR_ADDRESS \| RDMA_CM_JOIN_MC_ATTR_JOIN_FLAGS;
	mc_attr.addr = test.dst_addr;
	mc_attr.join_flags = send_only ? RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER
	: RDMA_MC_JOIN_FLAG_FULLMEMBER;

	ret = rdma_join_multicast_ex(node->cma_id, &mc_attr, node);

	if (ret) {
	perror("mckey: failure joining");
	goto err;
	}
	return 0;
	err:
	connect_error();
	return ret;
	}

	static int join_handler(struct cmatest_node *node,
	struct rdma_ud_param *param)
	{
	char buf[40];

	inet_ntop(AF_INET6, param->ah_attr.grh.dgid.raw, buf, 40);
	printf("mckey: joined dgid: %s mlid 0x%x sl %d\n", buf,
	param->ah_attr.dlid, param->ah_attr.sl);

	node->remote_qpn = param->qp_num;
	node->remote_qkey = param->qkey;
	node->ah = ibv_create_ah(node->pd, &param->ah_attr);
	if (!node->ah) {
	printf("mckey: failure creating address handle\n");
	goto err;
	}

	node->connected = 1;
	test.connects_left--;
	return 0;
	err:
	connect_error();
	return -1;
	}

	static int cma_handler(struct rdma_cm_id cma_id, struct rdma_cm_event event)
	{
	int ret = 0;

	switch (event->event) {
	case RDMA_CM_EVENT_ADDR_RESOLVED:
	ret = addr_handler(cma_id->context);
	break;
	case RDMA_CM_EVENT_MULTICAST_JOIN:
	ret = join_handler(cma_id->context, &event->param.ud);
	break;
	case RDMA_CM_EVENT_ADDR_ERROR:
	case RDMA_CM_EVENT_ROUTE_ERROR:
	case RDMA_CM_EVENT_MULTICAST_ERROR:
	printf("mckey: event: %s, error: %d\n",
	rdma_event_str(event->event), event->status);
	connect_error();
	ret = event->status;
	break;
	case RDMA_CM_EVENT_DEVICE_REMOVAL:
	/* Cleanup will occur after test completes. */
	break;
	default:
	break;
	}
	return ret;
	}

	static void cma_thread(void arg)
	{
	struct rdma_cm_event *event;
	int ret;

	while (1) {
	ret = rdma_get_cm_event(test.channel, &event);
	if (ret) {
	perror("rdma_get_cm_event");
	break;
	}

	switch (event->event) {
	case RDMA_CM_EVENT_MULTICAST_ERROR:
	case RDMA_CM_EVENT_ADDR_CHANGE:
	printf("mckey: event: %s, status: %d\n",
	rdma_event_str(event->event), event->status);
	break;
	default:
	break;
	}

	rdma_ack_cm_event(event);
	}
	return NULL;
	}

	static void destroy_node(struct cmatest_node *node)
	{
	if (!node->cma_id)
	return;

	if (node->ah)
	ibv_destroy_ah(node->ah);

	if (node->cma_id->qp)
	rdma_destroy_qp(node->cma_id);

	if (node->cq)
	ibv_destroy_cq(node->cq);

	if (node->mem) {
	ibv_dereg_mr(node->mr);
	free(node->mem);
	}

	if (node->pd)
	ibv_dealloc_pd(node->pd);

	/* Destroy the RDMA ID after all device resources */
	rdma_destroy_id(node->cma_id);
	}

	static int alloc_nodes(void)
	{
	int ret, i;

	test.nodes = malloc(sizeof test.nodes connections);
	if (!test.nodes) {
	printf("mckey: unable to allocate memory for test nodes\n");
	return -ENOMEM;
	}
	memset(test.nodes, 0, sizeof test.nodes connections);

	for (i = 0; i < connections; i++) {
	test.nodes[i].id = i;
	ret = rdma_create_id(test.channel, &test.nodes[i].cma_id,
	&test.nodes[i], port_space);
	if (ret)
	goto err;
	}
	return 0;
	err:
	while (--i >= 0)
	rdma_destroy_id(test.nodes[i].cma_id);
	free(test.nodes);
	return ret;
	}

	static void destroy_nodes(void)
	{
	int i;

	for (i = 0; i < connections; i++)
	destroy_node(&test.nodes[i]);
	free(test.nodes);
	}

	static int poll_cqs(void)
	{
	struct ibv_wc wc[8];
	int done, i, ret;

	for (i = 0; i < connections; i++) {
	if (!test.nodes[i].connected)
	continue;

	for (done = 0; done < message_count; done += ret) {
	ret = ibv_poll_cq(test.nodes[i].cq, 8, wc);
	if (ret < 0) {
	printf("mckey: failed polling CQ: %d\n", ret);
	return ret;
	}
	}
	}
	return 0;
	}

	static int connect_events(void)
	{
	struct rdma_cm_event *event;
	int ret = 0;

	while (test.connects_left && !ret) {
	ret = rdma_get_cm_event(test.channel, &event);
	if (!ret) {
	ret = cma_handler(event->id, event);
	rdma_ack_cm_event(event);
	}
	}
	return ret;
	}

	static int get_addr(char dst, struct sockaddr addr)
	{
	struct addrinfo *res;
	int ret;

	ret = getaddrinfo(dst, NULL, NULL, &res);
	if (ret) {
	printf("getaddrinfo failed (%s) - invalid hostname or IP address\n", gai_strerror(ret));
	return ret;
	}

	memcpy(addr, res->ai_addr, res->ai_addrlen);
	freeaddrinfo(res);
	return ret;
	}

	static int get_dst_addr(char dst, struct sockaddr addr)
	{
	struct sockaddr_ib *sib;

	if (!unmapped_addr)
	return get_addr(dst, addr);

	sib = (struct sockaddr_ib *) addr;
	memset(sib, 0, sizeof *sib);
	sib->sib_family = AF_IB;
	inet_pton(AF_INET6, dst, &sib->sib_addr);
	return 0;
	}

	static int run(void)
	{
	int i, ret;

	printf("mckey: starting %s\n", is_sender ? "client" : "server");
	if (src_addr) {
	ret = get_addr(src_addr, (struct sockaddr *) &test.src_in);
	if (ret)
	return ret;
	}

	ret = get_dst_addr(dst_addr, (struct sockaddr *) &test.dst_in);
	if (ret)
	return ret;

	printf("mckey: joining\n");
	for (i = 0; i < connections; i++) {
	if (src_addr) {
	ret = rdma_bind_addr(test.nodes[i].cma_id,
	test.src_addr);
	if (ret) {
	perror("mckey: addr bind failure");
	connect_error();
	return ret;
	}
	}

	if (unmapped_addr)
	ret = addr_handler(&test.nodes[i]);
	else
	ret = rdma_resolve_addr(test.nodes[i].cma_id,
	test.src_addr, test.dst_addr,
	2000);
	if (ret) {
	perror("mckey: resolve addr failure");
	connect_error();
	return ret;
	}
	}

	ret = connect_events();
	if (ret)
	goto out;

	pthread_create(&test.cmathread, NULL, cma_thread, NULL);

	/*
	* Pause to give SM chance to configure switches. We don't want to
	* handle reliability issue in this simple test program.
	*/
	sleep(3);

	if (message_count) {
	if (is_sender) {
	printf("initiating data transfers\n");
	for (i = 0; i < connections; i++) {
	ret = post_sends(&test.nodes[i], 0);
	if (ret)
	goto out;
	}
	} else {
	printf("receiving data transfers\n");
	ret = poll_cqs();
	if (ret)
	goto out;
	}
	printf("data transfers complete\n");
	}
	out:
	for (i = 0; i < connections; i++) {
	ret = rdma_leave_multicast(test.nodes[i].cma_id,
	test.dst_addr);
	if (ret)
	perror("mckey: failure leaving");
	}
	return ret;
	}

	int main(int argc, char **argv)
	{
	int op, ret;

	while ((op = getopt(argc, argv, "m:M:sb:c:C:S:p:ol")) != -1) {
	switch (op) {
	case 'm':
	dst_addr = optarg;
	break;
	case 'M':
	unmapped_addr = 1;
	dst_addr = optarg;
	break;
	case 's':
	is_sender = 1;
	break;
	case 'b':
	src_addr = optarg;
	test.src_addr = (struct sockaddr *) &test.src_in;
	break;
	case 'c':
	connections = atoi(optarg);
	break;
	case 'C':
	message_count = atoi(optarg);
	break;
	case 'S':
	message_size = atoi(optarg);
	break;
	case 'p':
	port_space = strtol(optarg, NULL, 0);
	break;
	case 'o':
	send_only = 1;
	break;
	case 'l':
	loopback = 0;
	break;

	default:
	printf("usage: %s\n", argv[0]);
	printf("\t-m multicast_address\n");
	printf("\t[-M unmapped_multicast_address]\n"
	"\t replaces -m and requires -b\n");
	printf("\t[-s(ender)]\n");
	printf("\t[-b bind_address]\n");
	printf("\t[-c connections]\n");
	printf("\t[-C message_count]\n");
	printf("\t[-S message_size]\n");
	printf("\t[-p port_space - %#x for UDP (default), "
	"%#x for IPOIB]\n", RDMA_PS_UDP, RDMA_PS_IPOIB);
	printf("\t[-o join as a send-only full-member]\n");
	printf("\t[-l join without multicast loopback]\n");
	exit(1);
	}
	}

	if (unmapped_addr && !src_addr) {
	printf("unmapped multicast address requires binding "
	"to source address\n");
	exit(1);
	}

	test.dst_addr = (struct sockaddr *) &test.dst_in;
	test.connects_left = connections;

	test.channel = create_event_channel();
	if (!test.channel) {
	exit(1);
	}

	if (alloc_nodes())
	exit(1);

	ret = run();

	printf("test complete\n");
	destroy_nodes();
	rdma_destroy_event_channel(test.channel);

	printf("return status %d\n", ret);
	return ret;
	}