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Copy pathRDMA_RC_Example.c
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RDMA_RC_Example.c
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/*test*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <inttypes.h>
#include <endian.h>
#include <byteswap.h>
#include <getopt.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <infiniband/verbs.h>
#include <errno.h>
/* poll CQ timeout in millisec (2 seconds) */
#define MAX_POLL_CQ_TIMEOUT 2000
#define SEND_MSG "*** SEND operation ***"
#define RDMA_MSG_R "*** RDMA Read operation ***"
#define RDMA_MSG_W "*** RDMA Write operation ***"
#define MSG_SIZE (strlen(SEND_MSG) + 1)
#if __BYTE_ORDER == __LITTLE_ENDIAN
static inline uint64_t htonll(uint64_t x) { return bswap_64(x); }
static inline uint64_t ntohll(uint64_t x) { return bswap_64(x); }
#elif __BYTE_ORDER == __BIG_ENDIAN
static inline uint64_t htonll(uint64_t x) { return x; }
static inline uint64_t ntohll(uint64_t x) { return x; }
#else
#error __BYTE_ORDER is neither __LITTLE_ENDIAN nor __BIG_ENDIAN
#endif
/* structure of test parameters */
struct config_t {
const char *dev_name; /* IB device name */
char *server_name; /* server host name */
u_int32_t tcp_port; /* server TCP port */
int ib_port; /* local IB port to work with */
int gid_idx; /* gid index to use */
};
/* structure to exchange data which is needed to connect the QPs */
struct cm_con_data_t {
uint64_t addr; /* Buffer address */
uint32_t rkey; /* Remote key */
uint32_t qp_num; /* QP number */
uint16_t lid; /* LID of the IB port */
uint8_t gid[16]; /* gid */
} __attribute__((packed));
/* structure of system resources */
struct resources {
struct ibv_device_attr device_attr; /* Device attributes */
struct ibv_port_attr port_attr; /* IB port attributes */
struct cm_con_data_t remote_props; /* values to connect to remote side */
struct ibv_context *ib_ctx; /* device handle */
struct ibv_pd *pd; /* PD handle */
struct ibv_cq *cq; /* CQ handle */
struct ibv_qp *qp; /* QP handle */
struct ibv_mr *mr; /* MR handle for buf */
char *buf; /* memory buffer pointer, used for RDMA and send ops */
int sock; /* TCP socket file descriptor */
};
struct config_t config = {
NULL, /* dev_name */
NULL, /* server_name */
19875, /* tcp_port */
1, /* ib_port */
-1 /* gid_idx */
};
/******************************************************************************
* Socket operations
*
* For simplicity, the example program uses TCP sockets to exchange control information. If a TCP/IP stack/connection is not available,
* connection manager (CM) may be used to pass this information. Use of CM is beyond the scope of this example
*
* ******************************************************************************/
/******************************************************************************
* * Function: sock_connect
* *
* *
* * Input
* * servername URL of server to connect to (NULL for server mode)
* * port port of service
* *
* * Output
* * none
* *
* * Returns
* * socket (fd) on success, negative error code on failure
* *
* * Description
* * Connect a socket. If servername is specified a client connection will be
* * initiated to the indicated server and port. Otherwise listen on the
* * indicated port for an incoming connection.
* *
* ******************************************************************************/
static int sock_connect(const char *servername, int port)
{
struct addrinfo *resolved_addr = NULL;
struct addrinfo *iterator;
char service[6];
int sockfd = -1;
int listenfd = 0;
int tmp;
struct addrinfo hints = {
.ai_flags = AI_PASSIVE,
.ai_family = AF_INET,
.ai_socktype = SOCK_STREAM
};
if (sprintf(service, "%d", port) < 0)
goto sock_connect_exit;
/* Resolve DNS address, use sockfd as temp storage */
sockfd = getaddrinfo(servername, service, &hints, &resolved_addr);
if (sockfd < 0) {
fprintf(stderr, "%s for %s:%d\n", gai_strerror(sockfd), servername, port); goto sock_connect_exit;
}
/* Search through results and find the one we want */
for (iterator = resolved_addr; iterator ; iterator = iterator->ai_next) {
sockfd = socket(iterator->ai_family, iterator->ai_socktype, iterator->ai_protocol);
if (sockfd >= 0) {
if (servername) {
/* Client mode. Initiate connection to remote */
if((tmp=connect(sockfd, iterator->ai_addr, iterator->ai_addrlen))) {
fprintf(stdout, "failed connect \n");
close(sockfd);
sockfd = -1;
}
}
else {
/* Server mode. Set up listening socket and accept a connection */
listenfd = sockfd;
sockfd = -1;
if(bind(listenfd, iterator->ai_addr, iterator->ai_addrlen))
goto sock_connect_exit;
listen(listenfd, 1);
sockfd = accept(listenfd, NULL, 0);
}
}
}
sock_connect_exit:
if(listenfd) close(listenfd);
if(resolved_addr) freeaddrinfo(resolved_addr);
if (sockfd < 0) {
if(servername)
fprintf(stderr, "Couldn't connect to %s:%d\n", servername, port);
else {
perror("server accept");
fprintf(stderr, "accept() failed\n");
}
}
return sockfd;
}
/******************************************************************************
* * Function: sock_sync_data
* *
* * Input
* * sock socket to transfer data on
* * xfer_size size of data to transfer
* * local_data pointer to data to be sent to remote
* *
* * Output
* * remote_data pointer to buffer to receive remote data
* *
* * Returns
* * 0 on success, negative error code on failure
* *
* * Description
* * Sync data across a socket. The indicated local data will be sent to the
* * remote. It will then wait for the remote to send its data back. It is
* * assumed that the two sides are in sync and call this function in the proper
* * order. Chaos will ensue if they are not. :)
* *
* * Also note this is a blocking function and will wait for the full data to be
* * received from the remote.
* *
* ******************************************************************************/
int sock_sync_data(int sock, int xfer_size, char *local_data, char *remote_data)
{
int rc;
int read_bytes = 0;
int total_read_bytes = 0;
rc = write(sock, local_data, xfer_size);
if(rc < xfer_size)
fprintf(stderr, "Failed writing data during sock_sync_data\n");
else
rc = 0;
while(!rc && total_read_bytes < xfer_size) {
read_bytes = read(sock, remote_data, xfer_size);
if(read_bytes > 0)
total_read_bytes += read_bytes;
else
rc = read_bytes;
}
return rc;
}
/******************************************************************************
* End of socket operations
* ******************************************************************************/
/* poll_completion */
/******************************************************************************
* * Function: poll_completion
* *
* * Input
* * res pointer to resources structure
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, 1 on failure
* *
* * Description
* * Poll the completion queue for a single event. This function will continue to
* * poll the queue until MAX_POLL_CQ_TIMEOUT milliseconds have passed.
* *
* ******************************************************************************/
static int poll_completion(struct resources *res)
{
struct ibv_wc wc;
unsigned long start_time_msec;
unsigned long cur_time_msec;
struct timeval cur_time;
int poll_result;
int rc = 0;
/* poll the completion for a while before giving up of doing it .. */
gettimeofday(&cur_time, NULL);
start_time_msec = (cur_time.tv_sec * 1000) + (cur_time.tv_usec / 1000);
do {
poll_result = ibv_poll_cq(res->cq, 1, &wc);
gettimeofday(&cur_time, NULL);
cur_time_msec = (cur_time.tv_sec * 1000) + (cur_time.tv_usec / 1000);
} while ((poll_result == 0) && ((cur_time_msec - start_time_msec) < MAX_POLL_CQ_TIMEOUT));
if (poll_result < 0) {
/* poll CQ failed */
fprintf(stderr, "poll CQ failed retval = %d, errno: %s\n", poll_result, strerror(errno));
rc = 1;
} else if (poll_result == 0) {
/* the CQ is empty */
fprintf(stderr, "completion wasn't found in the CQ after timeout. errno: %s\n", strerror(errno));
rc = 1;
} else {
/* CQE found */
fprintf(stdout, "completion was found in CQ with status 0x%x\n", wc.status);
/* check the completion status (here we don't care about the completion opcode */
if (wc.status != IBV_WC_SUCCESS) {
fprintf(stderr, "got bad completion with status: 0x%x, vendor syndrome: 0x%x\n", wc.status, wc.vendor_err);
rc = 1;
}
}
return rc;
}
/******************************************************************************
* * Function: post_send
* *
* * Input
* * res pointer to resources structure
* * opcode IBV_WR_SEND, IBV_WR_RDMA_READ or IBV_WR_RDMA_WRITE
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, error code on failure
* *
* * Description
* * This function will create and post a send work request
* ******************************************************************************/
static int post_send(struct resources *res, int opcode)
{
struct ibv_send_wr sr;
struct ibv_sge sge;
struct ibv_send_wr *bad_wr = NULL;
int rc;
/* prepare the scatter/gather entry */
memset(&sge, 0, sizeof(sge));
sge.addr = (uintptr_t)res->buf;
sge.length = MSG_SIZE;
sge.lkey = res->mr->lkey;
/* prepare the send work request */
memset(&sr, 0, sizeof(sr));
sr.next = NULL;
sr.wr_id = 0;
sr.sg_list = &sge;
sr.num_sge = 1;
sr.opcode = opcode;
sr.send_flags = IBV_SEND_SIGNALED;
if(opcode != IBV_WR_SEND) {
sr.wr.rdma.remote_addr = res->remote_props.addr;
sr.wr.rdma.rkey = res->remote_props.rkey;
}
/* there is a Receive Request in the responder side, so we won't get any into RNR flow */
rc = ibv_post_send(res->qp, &sr, &bad_wr);
if (rc)
fprintf(stderr, "failed to post SR\n");
else {
switch(opcode) {
case IBV_WR_SEND:
fprintf(stdout, "Send Request was posted\n"); break;
case IBV_WR_RDMA_READ:
fprintf(stdout, "RDMA Read Request was posted\n"); break;
case IBV_WR_RDMA_WRITE:
fprintf(stdout, "RDMA Write Request was posted\n"); break;
default:
fprintf(stdout, "Unknown Request was posted\n"); break;
}
}
return rc;
}
/******************************************************************************
* * Function: post_receive
* *
* * Input
* * res pointer to resources structure
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, error code on failure
* *
* * Description
* *
* ******************************************************************************/
static int post_receive(struct resources *res)
{
struct ibv_recv_wr rr;
struct ibv_sge sge;
struct ibv_recv_wr *bad_wr;
int rc;
/* prepare the scatter/gather entry */
memset(&sge, 0, sizeof(sge));
sge.addr = (uintptr_t)res->buf;
sge.length = MSG_SIZE;
sge.lkey = res->mr->lkey;
/* prepare the receive work request */
memset(&rr, 0, sizeof(rr));
rr.next = NULL;
rr.wr_id = 0;
rr.sg_list = &sge;
rr.num_sge = 1;
/* post the Receive Request to the RQ */
rc = ibv_post_recv(res->qp, &rr, &bad_wr);
if (rc)
fprintf(stderr, "failed to post RR\n");
else
fprintf(stdout, "Receive Request was posted\n");
return rc;
}
/******************************************************************************
* * Function: resources_init
* *
* * Input
* * res pointer to resources structure
* *
* * Output
* * res is initialized
* *
* * Returns
* * none
* *
* * Description
* * res is initialized to default values
* ******************************************************************************/
static void resources_init(struct resources *res)
{
memset(res, 0, sizeof *res);
res->sock = -1;
}
/******************************************************************************
* * Function: resources_create
* *
* * Input
* * res pointer to resources structure to be filled in
* *
* * Output
* * res filled in with resources
* *
* * Returns
* * 0 on success, 1 on failure
* *
* * Description
* *
* * This function creates and allocates all necessary system resources. These
* * are stored in res.
* *****************************************************************************/
static int resources_create(struct resources *res)
{
struct ibv_device **dev_list = NULL;
struct ibv_qp_init_attr qp_init_attr;
struct ibv_device *ib_dev = NULL;
size_t size;
int i;
int mr_flags = 0;
int cq_size = 0;
int num_devices;
int rc = 0;
if (config.server_name) {
/* Client side */
res->sock = sock_connect(config.server_name, config.tcp_port);
if (res->sock < 0) {
fprintf(stderr, "[Client only] failed to establish TCP connection to server %s, port %d\n", config.server_name, config.tcp_port);
rc = -1;
goto resources_create_exit;
}
} else {
/* server side */
fprintf(stdout, "[Server only] waiting on port %d for TCP connection\n", config.tcp_port);
res->sock = sock_connect(NULL, config.tcp_port);
if (res->sock < 0) {
fprintf(stderr, "[Server only] failed to establish TCP connection with client on port %d\n", config.tcp_port);
rc = -1;
goto resources_create_exit;
}
}
fprintf(stdout, "TCP connection was established\n");
fprintf(stdout, "searching for IB devices in host\n");
/* get device names in the system */
dev_list = ibv_get_device_list(&num_devices);
if (!dev_list) {
fprintf(stderr, "failed to get IB devices list\n");
rc = 1;
goto resources_create_exit;
}
/* if there isn't any IB device in host */
if (!num_devices) {
fprintf(stderr, "found %d device(s)\n", num_devices);
rc = 1;
goto resources_create_exit;
}
fprintf(stdout, "found %d device(s)\n", num_devices);
/* search for the specific device we want to work with */
for (i = 0; i < num_devices; i ++) {
if (!config.dev_name) {
config.dev_name = strdup(ibv_get_device_name(dev_list[i]));
fprintf(stdout, "device not specified, using first one found: %s\n", config.dev_name);
}
if (!strcmp(ibv_get_device_name(dev_list[i]), config.dev_name)) {
ib_dev = dev_list[i];
break;
}
}
/* if the device wasn't found in host */
if (!ib_dev) {
fprintf(stderr, "IB device %s wasn't found\n", config.dev_name);
rc = 1;
goto resources_create_exit;
}
/* get device handle */
res->ib_ctx = ibv_open_device(ib_dev);
if (!res->ib_ctx) {
fprintf(stderr, "failed to open device %s\n", config.dev_name);
rc = 1;
goto resources_create_exit;
}
/* We are now done with device list, free it */
ibv_free_device_list(dev_list);
dev_list = NULL;
ib_dev = NULL;
/* query port properties */
if (ibv_query_port(res->ib_ctx, config.ib_port, &res->port_attr)) {
fprintf(stderr, "ibv_query_port on port %u failed\n", config.ib_port);
rc = 1;
goto resources_create_exit;
}
/* allocate Protection Domain */
res->pd = ibv_alloc_pd(res->ib_ctx);
if (!res->pd) {
fprintf(stderr, "ibv_alloc_pd failed\n");
rc = 1;
goto resources_create_exit;
}
/* each side will send only one WR, so Completion Queue with 1 entry is enough */
cq_size = 1;
res->cq = ibv_create_cq(res->ib_ctx, cq_size, NULL, NULL, 0);
if (!res->cq) {
fprintf(stderr, "failed to create CQ with %u entries\n", cq_size);
rc = 1;
goto resources_create_exit;
}
/* allocate the memory buffer that will hold the data */
size = MSG_SIZE;
res->buf = (char *) malloc(size);
if (!res->buf) {
fprintf(stderr, "failed to malloc %Zu bytes to memory buffer\n", size);
rc = 1;
goto resources_create_exit;
}
memset(res->buf, 0 , size);
/* only in the server side put the message in the memory buffer */
if (!config.server_name) {
strcpy(res->buf, SEND_MSG);
fprintf(stdout, "[Server only] going to send the message: '%s'\n", res->buf);
} else
memset(res->buf, 0, size);
/* register the memory buffer */
mr_flags = IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_READ | IBV_ACCESS_REMOTE_WRITE;
res->mr = ibv_reg_mr(res->pd, res->buf, size, mr_flags);
if (!res->mr) {
fprintf(stderr, "ibv_reg_mr failed with mr_flags=0x%x\n", mr_flags);
rc = 1;
goto resources_create_exit;
}
fprintf(stdout, "MR was registered with addr=%p, lkey=0x%x, rkey=0x%x, flags=0x%x\n", res->buf, res->mr->lkey, res->mr->rkey, mr_flags);
/* create the Queue Pair */
memset(&qp_init_attr, 0, sizeof(qp_init_attr));
qp_init_attr.qp_type = IBV_QPT_RC;
qp_init_attr.sq_sig_all = 1;
qp_init_attr.send_cq = res->cq;
qp_init_attr.recv_cq = res->cq;
qp_init_attr.cap.max_send_wr = 1;
qp_init_attr.cap.max_recv_wr = 1;
qp_init_attr.cap.max_send_sge = 1;
qp_init_attr.cap.max_recv_sge = 1;
res->qp = ibv_create_qp(res->pd, &qp_init_attr);
if (!res->qp) {
fprintf(stderr, "failed to create QP\n");
rc = 1;
goto resources_create_exit;
}
fprintf(stdout, "QP was created, QP number=0x%x\n", res->qp->qp_num);
resources_create_exit:
if (rc) {
/* Error encountered, cleanup */
if (res->qp) {
ibv_destroy_qp(res->qp);
res->qp = NULL;
}
if (res->mr) {
ibv_dereg_mr(res->mr);
res->mr = NULL;
}
if (res->buf) {
free(res->buf);
res->buf = NULL;
}
if (res->cq) {
ibv_destroy_cq(res->cq);
res->cq = NULL;
}
if (res->pd) {
ibv_dealloc_pd(res->pd);
res->pd = NULL;
}
if (res->ib_ctx) {
ibv_close_device(res->ib_ctx);
res->ib_ctx = NULL;
}
if (dev_list) {
ibv_free_device_list(dev_list);
dev_list = NULL;
}
if (res->sock >= 0) {
if (close(res->sock))
fprintf(stderr, "failed to close socket\n");
res->sock = -1;
}
}
return rc;
}
/******************************************************************************
* * Function: modify_qp_to_init
* *
* * Input
* * qp QP to transition
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, ibv_modify_qp failure code on failure
* *
* * Description
* * Transition a QP from the RESET to INIT state
* ******************************************************************************/
static int modify_qp_to_init(struct ibv_qp *qp)
{
struct ibv_qp_attr attr;
int flags;
int rc;
memset(&attr, 0, sizeof(attr));
attr.qp_state = IBV_QPS_INIT;
attr.port_num = config.ib_port;
attr.pkey_index = 0;
attr.qp_access_flags = IBV_ACCESS_REMOTE_READ | IBV_ACCESS_REMOTE_WRITE;
flags = IBV_QP_STATE | IBV_QP_PKEY_INDEX | IBV_QP_PORT | IBV_QP_ACCESS_FLAGS;
rc = ibv_modify_qp(qp, &attr, flags);
if (rc)
fprintf(stderr, "failed to modify QP state to INIT (%s)\n", strerror(errno));
return rc;
}
/******************************************************************************
* * Function: modify_qp_to_rtr
* *
* * Input
* * qp QP to transition
* * remote_qpn remote QP number
* * dlid destination LID
* * dgid destination GID (mandatory for RoCEE)
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, ibv_modify_qp failure code on failure
* *
* * Description
* * Transition a QP from the INIT to RTR state, using the specified QP number
* ******************************************************************************/
static int modify_qp_to_rtr(struct ibv_qp *qp, uint32_t remote_qpn, uint16_t dlid, const uint8_t *dgid)
{
struct ibv_qp_attr attr;
int flags;
int rc;
memset(&attr, 0, sizeof(attr));
attr.qp_state = IBV_QPS_RTR;
attr.path_mtu = IBV_MTU_256;
attr.dest_qp_num = remote_qpn;
attr.rq_psn = 0;
attr.max_dest_rd_atomic = 1;
attr.min_rnr_timer = 0x12;
attr.ah_attr.is_global = 0;
attr.ah_attr.dlid = dlid;
attr.ah_attr.sl = 0;
attr.ah_attr.src_path_bits = 0;
attr.ah_attr.port_num = config.ib_port;
if (config.gid_idx >= 0) {
attr.ah_attr.is_global = 1;
attr.ah_attr.port_num = 1;
memcpy(&attr.ah_attr.grh.dgid, dgid, 16);
attr.ah_attr.grh.flow_label = 0;
attr.ah_attr.grh.hop_limit = 1;
attr.ah_attr.grh.sgid_index = config.gid_idx;
attr.ah_attr.grh.traffic_class = 0;
}
flags = IBV_QP_STATE | IBV_QP_AV | IBV_QP_PATH_MTU | IBV_QP_DEST_QPN | IBV_QP_RQ_PSN | IBV_QP_MAX_DEST_RD_ATOMIC | IBV_QP_MIN_RNR_TIMER;
rc = ibv_modify_qp(qp, &attr, flags);
if (rc)
fprintf(stderr, "failed to modify QP state to RTR (%s)\n", strerror(errno));
return rc;
}
/******************************************************************************
* * Function: modify_qp_to_rts
* *
* * Input
* * qp QP to transition
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, ibv_modify_qp failure code on failure
* *
* * Description
* * Transition a QP from the RTR to RTS state
* ******************************************************************************/
static int modify_qp_to_rts(struct ibv_qp *qp)
{
struct ibv_qp_attr attr;
int flags;
int rc;
memset(&attr, 0, sizeof(attr));
attr.qp_state = IBV_QPS_RTS;
attr.timeout = 0x12;
attr.retry_cnt = 6;
attr.rnr_retry = 0;
attr.sq_psn = 0;
attr.max_rd_atomic = 1;
flags = IBV_QP_STATE | IBV_QP_TIMEOUT | IBV_QP_RETRY_CNT | IBV_QP_RNR_RETRY | IBV_QP_SQ_PSN | IBV_QP_MAX_QP_RD_ATOMIC;
rc = ibv_modify_qp(qp, &attr, flags);
if (rc)
fprintf(stderr, "failed to modify QP state to RTS (%s)\n", strerror(errno));
return rc;
}
/******************************************************************************
* * Function: connect_qp
* *
* * Input
* * res pointer to resources structure
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, error code on failure
* *
* * Description
* * Connect the QP. Transition the server side to RTR, sender side to RTS
* ******************************************************************************/
static int connect_qp(struct resources *res)
{
struct cm_con_data_t local_con_data;
struct cm_con_data_t remote_con_data;
struct cm_con_data_t tmp_con_data;
int rc = 0;
char temp_char;
union ibv_gid my_gid;
if (config.gid_idx >= 0) {
rc = ibv_query_gid(res->ib_ctx, config.ib_port, config.gid_idx, &my_gid);
if (rc) {
fprintf(stderr, "could not get gid for port %d, index %d\n", config.ib_port, config.gid_idx);
return rc;
}
} else
memset(&my_gid, 0, sizeof my_gid);
/* exchange using TCP sockets info required to connect QPs */
local_con_data.addr = htonll((uintptr_t)res->buf);
local_con_data.rkey = htonl(res->mr->rkey);
local_con_data.qp_num = htonl(res->qp->qp_num);
local_con_data.lid = htons(res->port_attr.lid);
memcpy(local_con_data.gid, &my_gid, sizeof(my_gid));
fprintf(stdout, "\nLocal LID = 0x%x\n", res->port_attr.lid);
if (sock_sync_data(res->sock, sizeof(struct cm_con_data_t), (char *) &local_con_data, (char *) &tmp_con_data) < 0) {
fprintf(stderr, "failed to exchange connection data between sides\n");
return 1;
}
remote_con_data.addr = ntohll(tmp_con_data.addr);
remote_con_data.rkey = ntohl(tmp_con_data.rkey);
remote_con_data.qp_num = ntohl(tmp_con_data.qp_num);
remote_con_data.lid = ntohs(tmp_con_data.lid);
memcpy(remote_con_data.gid, tmp_con_data.gid, sizeof(my_gid));
/* save the remote side attributes, we will need it for the post SR */
res->remote_props = remote_con_data;
fprintf(stdout, "Remote address = 0x%"PRIx64"\n", remote_con_data.addr);
fprintf(stdout, "Remote rkey = 0x%x\n", remote_con_data.rkey);
fprintf(stdout, "Remote QP number = 0x%x\n", remote_con_data.qp_num);
fprintf(stdout, "Remote LID = 0x%x\n", remote_con_data.lid);
if (config.gid_idx >= 0) {
const uint8_t *p = remote_con_data.gid;
fprintf(stdout, "Remote GID = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
}
/* modify the QP to init */
rc = modify_qp_to_init(res->qp);
if (rc) {
fprintf(stderr, "change QP state to INIT failed\n");
return rc;
}
/* let the client post RR to be prepared for incoming messages */
if (config.server_name) {
rc = post_receive(res);
if (rc) {
fprintf(stderr, "failed to post RR\n");
return rc;
}
}
/* modify the QP to RTR */
rc = modify_qp_to_rtr(res->qp, remote_con_data.qp_num, remote_con_data.lid, remote_con_data.gid);
if (rc) {
fprintf(stderr, "failed to modify QP state to RTR (%s)\n", strerror(errno));
return rc;
}
rc = modify_qp_to_rts(res->qp);
if (rc) {
fprintf(stderr, "failed to modify QP state to RTS (%s)\n", strerror(errno));
return rc;
}
fprintf(stdout, "QP state was change to RTS\n");
/* sync to make sure that both sides are in states that they can connect to prevent packet loose */
if (sock_sync_data(res->sock, 1, "Q", &temp_char)) { /* just send a dummy char back and forth */
fprintf(stderr, "sync error after QPs were moved to RTS\n");
return rc;
}
return 0;
}
/******************************************************************************
* * Function: resources_destroy
* *
* * Input
* * res pointer to resources structure
* *
* * Output
* * none
* *
* * Returns
* * 0 on success, 1 on failure
* *
* * Description
* * Cleanup and deallocate all resources used
* ******************************************************************************/
static int resources_destroy(struct resources *res)
{
int rc = 0;
if (res->qp)
if (ibv_destroy_qp(res->qp)) {
fprintf(stderr, "failed to destroy QP\n");
rc = 1;
}
if (res->mr)
if (ibv_dereg_mr(res->mr)) {
fprintf(stderr, "failed to deregister MR\n");
rc = 1;
}
if (res->buf)
free(res->buf);
if (res->cq)
if (ibv_destroy_cq(res->cq)) {
fprintf(stderr, "failed to destroy CQ\n");
rc = 1;
}
if (res->pd)
if (ibv_dealloc_pd(res->pd)) {
fprintf(stderr, "failed to deallocate PD\n");
rc = 1;
}
if (res->ib_ctx)
if (ibv_close_device(res->ib_ctx)) {
fprintf(stderr, "failed to close device context\n");
rc = 1;
}
if (res->sock >= 0)
if (close(res->sock)) {
fprintf(stderr, "failed to close socket\n");
rc = 1;
}
return rc;
}
/******************************************************************************
* * Function: print_config
* *
* * Description
* * Print out config information
* ******************************************************************************/
static void print_config(void)
{
fprintf(stdout, " ------------------------------------------------\n");
fprintf(stdout, " Device name : \"%s\"\n", config.dev_name);
fprintf(stdout, " IB port : %u\n", config.ib_port);
if (config.server_name)
fprintf(stdout, "[client only] IP : %s\n", config.server_name);
fprintf(stdout, " TCP port : %u\n", config.tcp_port);
if (config.gid_idx >= 0)
fprintf(stdout, " GID index : %u\n", config.gid_idx);
fprintf(stdout, " ------------------------------------------------\n\n");
}
/******************************************************************************
* * Function: usage
* *
* * Input
* * argv0 command line arguments
* *
* * Output
* * none
* *
* * Returns
* * none
* *
* * Description