crc32_offload_api_example

https://github.com/Mellanox/crc32_offload_api_example

 

Makefile

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CC ?= gcc   LDFLAGS += -libverbs     TARGETS = ibv_crc32_example   all: $(TARGETS)   ibv_crc32_example: crc32_example.o     $(CC) $(LDFLAGS) -o $@ $^   clean:     rm -f *.o $(TARGETS)

 README

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BUILD =====   $ make cc    -c -o crc32_example.o crc32_example.c cc -libverbs -o ibv_crc32_example crc32_example.o     Examples:   # Run the server ./ibv_crc32_example -d mlx5_0 -i 1   # Run the initiator ./ibv_crc32_example -d mlx5_0 -i 1 11.212.80.5     $ ./ibv_crc32_example --help Usage:  ./ibv_crc32_example start a server and wait for connection  ./ibv_crc32_example <host> connect to server at <host>   Options:  -p, --port <port>            listen on/connect to port <port> (default 18515)  -d, --ib-dev <dev>           use IB device <dev> (default first device found)  -i, --ib-port <port>         use port <port> of IB device (default 1)  -g, --gid_idx <git index>    gid index to be used in GRH (default not used)  -b, --block-size <size>      size of data block, only 512 and 4096 are supported (default 512)  -n, --number-of-blocks <NB>  Number of blocks per RDMA operation (default 8)  -o, --interleave             Contiguous data segments and signature blocks logically interleaved using UMR capabilities. (disabled by default)

 crc32_example.c

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#define _POSIX_C_SOURCE 200809L #include <arpa/inet.h> #include <byteswap.h> #include <endian.h> #include <getopt.h> #include <infiniband/verbs.h> #include <inttypes.h> #include <netdb.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <sys/time.h> #include <sys/types.h> #include <unistd.h>   /* poll CQ timeout in millisec (2 seconds) */ #define MAX_POLL_CQ_TIMEOUT 2000 /* Protection information size is 4 bytes for CRC32 */ #define PI_SIZE 4   #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   enum sig_mode {     SIG_MODE_INSERT,     SIG_MODE_CHECK,     SIG_MODE_STRIP, };   /* 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 */     int block_size;     int nb;     int interleave; };   /* structure to exchange data which is needed to connect the QPs */ struct cm_con_data_t {     uint32_t qp_num;     uint16_t lid;     uint8_t gid[16]; } __attribute__((packed));   enum msg_types {     MSG_TYPE_RDMA_READ_REQ = 0,     MSG_TYPE_RDMA_READ_REP,     MSG_TYPE_RDMA_WRITE_REQ,     MSG_TYPE_RDMA_WRITE_REP,     MSG_TYPE_CLOSE_CONN, };   enum msg_rep_status {     MSG_REP_STATUS_OK = 0,     MSG_REP_STATUS_FAIL, };   struct msg_t {     uint8_t type;     union {         struct {             uint64_t addr; /* Buffer address */             uint32_t rkey; /* Remote key */         } req;         struct {             uint32_t status;         } rep;     } data; } __attribute__((packed)); #define MSG_SIZE (sizeof(struct msg_t))   /* structure of system resources */ struct resources {     struct ibv_device_attr device_attr;     /* Device attributes */     struct ibv_port_attr port_attr;     struct cm_con_data_t remote_props; /* values to connect to remote side */     struct ibv_context *ib_ctx;     struct ibv_pd *pd;     struct ibv_cq *cq;     struct ibv_qp *qp;       struct ibv_mr *send_mr; /* MR for send buffer */     struct ibv_mr *recv_mr; /* MR for recv buffer */     struct ibv_mr *data_mr; /* MR for data buffer */     struct ibv_mr *pi_mr;   /* MR for protection information buffer */     struct ibv_mr *sig_mr;  /* signature MR */       char *send_buf;     char *recv_buf;     uint8_t *data_buf;     size_t data_buf_size;     uint8_t *pi_buf;     size_t pi_buf_size;     int sock; /* TCP socket file descriptor */ };   struct config_t config = {     .dev_name   = NULL,     .server_name    = NULL,     .tcp_port   = 19875,     .ib_port    = 1,     .gid_idx    = -1,     .block_size = 512,     .nb     = 8,     .interleave = 0 };   /****************************************************************************** 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) {         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 an 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\n");         rc = 1;     } else if (poll_result == 0) {         /* the CQ is empty */         fprintf(stderr,             "completion wasn't found in the CQ after timeout\n");         rc = 1;     } else {         /* CQE found */         fprintf(stdout, "completion was found in CQ with status 0x%x, opcode %u\n",             wc.status, wc.opcode);         /* 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, const struct msg_t *req) {     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));     if (!req) {         sge.addr = (uintptr_t)res->send_mr->addr;         sge.length = MSG_SIZE;         sge.lkey = res->send_mr->lkey;     } else {         sge.addr = (uintptr_t)res->sig_mr->addr;         sge.length = config.block_size * config.nb;         sge.lkey = res->sig_mr->lkey;     }       /* prepare the send work request */     memset(&sr, 0, sizeof(sr));     sr.next = NULL;     sr.sg_list = &sge;     sr.num_sge = 1;     sr.opcode = opcode;     sr.send_flags = IBV_SEND_SIGNALED;     if (req) {         sr.wr.rdma.remote_addr = ntohll(req->data.req.addr);         sr.wr.rdma.rkey = ntohl(req->data.req.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->recv_mr->addr;     sge.length = MSG_SIZE;     sge.lkey = res->recv_mr->lkey;       /* prepare the receive work request */     memset(&rr, 0, sizeof(rr));     rr.sg_list = &sge;     rr.num_sge = 1;       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; }   void set_sig_domain_none(struct ibv_exp_sig_domain *sd) {     memset(sd, 0, sizeof(struct ibv_exp_sig_domain));       sd->sig_type = IBV_EXP_SIG_TYPE_NONE; }     void set_sig_domain_crc32(struct ibv_exp_sig_domain *sd) {     memset(sd, 0, sizeof(struct ibv_exp_sig_domain));       sd->sig_type = IBV_EXP_SIG_TYPE_CRC32;     sd->sig.crc.pi_interval = config.block_size;     sd->sig.crc.bg = 0xffffffff; }     int reg_sig_mr(struct resources *res,            enum sig_mode mode) {     struct ibv_exp_sig_attrs sig_attrs = {         .check_mask = 0xff,     };     struct ibv_sge data;     struct ibv_sge prot;     struct ibv_exp_send_wr wr;     struct ibv_exp_send_wr *bad_wr;     int rc;       switch (mode) {     case SIG_MODE_INSERT:     case SIG_MODE_STRIP:         set_sig_domain_none(&sig_attrs.mem);         set_sig_domain_crc32(&sig_attrs.wire);         break;     case SIG_MODE_CHECK:         set_sig_domain_crc32(&sig_attrs.mem);         set_sig_domain_crc32(&sig_attrs.wire);         break;     default:         break;     }       memset(&wr, 0, sizeof(wr));     wr.exp_opcode = IBV_EXP_WR_REG_SIG_MR;     wr.exp_send_flags = IBV_EXP_SEND_SIGNALED;     wr.ext_op.sig_handover.sig_attrs = &sig_attrs;     wr.ext_op.sig_handover.sig_mr = res->sig_mr;     wr.ext_op.sig_handover.access_flags = IBV_ACCESS_LOCAL_WRITE |                                           IBV_ACCESS_REMOTE_READ |                                           IBV_ACCESS_REMOTE_WRITE;     data.addr = (uintptr_t)res->data_mr->addr;     data.lkey = res->data_mr->lkey;     if ((mode == SIG_MODE_INSERT) ||         (mode == SIG_MODE_STRIP) ||         (config.interleave))         data.length = config.block_size * config.nb;     else         data.length = res->data_mr->length;     wr.num_sge = 1;     wr.sg_list = &data;       if ((!res->pi_buf) ||         (mode == SIG_MODE_INSERT) ||         (mode == SIG_MODE_STRIP)) {         wr.ext_op.sig_handover.prot = NULL;     } else {         prot.addr = (uint64_t)res->pi_mr->addr;         prot.length = res->pi_mr->length;         prot.lkey = res->pi_mr->lkey;         wr.ext_op.sig_handover.prot = &prot;     }       rc = ibv_exp_post_send(res->qp, &wr, &bad_wr);     if (rc) {         fprintf(stderr, "post sig mr registration failed\n");         return rc;     }       rc = poll_completion(res);     if (rc) {         fprintf(stderr, "poll completion failed\n");     }       fprintf(stdout, "Signature MR was registered with addr=%p, lkey=0x%x, rkey=0x%x\n",         res->sig_mr->addr, res->sig_mr->lkey, res->sig_mr->rkey);       return rc; }     int inv_sig_mr(struct resources *res) {     struct ibv_exp_send_wr wr;     struct ibv_exp_send_wr *bad_wr;     int rc;       memset(&wr, 0, sizeof(wr));     wr.exp_opcode = IBV_EXP_WR_LOCAL_INV;     wr.exp_send_flags = IBV_EXP_SEND_SIGNALED;     wr.ex.invalidate_rkey = res->sig_mr->rkey;       rc = ibv_exp_post_send(res->qp, &wr, &bad_wr);     if (rc) {         fprintf(stderr, "post sig mr ivalidate failed\n");         return rc;     }       rc = poll_completion(res);     if (rc) {         fprintf(stderr, "poll completion failed\n");     }     fprintf(stdout, "Invalidate signature MR rkey=0x%x\n",         res->sig_mr->rkey);       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;       res->data_buf_size = config.block_size * config.nb;       if (!config.interleave)         res->data_buf_size += PI_SIZE * config.nb;     else         res->pi_buf_size = PI_SIZE * config.nb; }   int alloc_and_register_buffer(struct ibv_pd *pd,                   size_t size,                   void **buf,                   struct ibv_mr **mr) {     int mr_flags = 0;       if (!size)         return 0;       *buf = malloc(size);     if (!*buf) {         fprintf(stderr, "failed to malloc %Zu bytes to memory buffer\n",             size);         return 1;     }     memset(*buf, 0, size);       mr_flags = IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_READ |            IBV_ACCESS_REMOTE_WRITE;     *mr = ibv_reg_mr(pd, *buf, size, mr_flags);     if (!*mr) {         fprintf(stderr, "ibv_reg_mr failed with mr_flags=0x%x\n",             mr_flags);         free(*buf);         *buf = NULL;         return 1;     }       return 0; }   /******************************************************************************  * 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_exp_qp_init_attr qp_init_attr;     struct ibv_device *ib_dev = NULL;     struct ibv_exp_create_mr_in sig_mr_in = { };       size_t size;     int i;     int cq_size = 0;     int num_devices;     int rc = 0;       /* if client side */     if (config.server_name) {         res->sock = sock_connect(config.server_name, config.tcp_port);         if (res->sock < 0) {             fprintf(stderr,                 "failed to establish TCP connection to server %s, port %d\n",                 config.server_name, config.tcp_port);             rc = -1;             goto resources_create_exit;         }     } else {         fprintf(stdout, "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,                 "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;     }       cq_size = 16;     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;     }       rc = alloc_and_register_buffer(res->pd, MSG_SIZE,                     (void **)&res->send_buf, &res->send_mr);     if (rc) {         goto resources_create_exit;     }     rc = alloc_and_register_buffer(res->pd, MSG_SIZE,                     (void **)&res->recv_buf, &res->recv_mr);     if (rc) {         goto resources_create_exit;     }       rc = alloc_and_register_buffer(res->pd, res->data_buf_size,                     (void **)&res->data_buf, &res->data_mr);     if (rc) {         goto resources_create_exit;     }       rc = alloc_and_register_buffer(res->pd, res->pi_buf_size,                     (void **)&res->pi_buf, &res->pi_mr);     if (rc) {         goto resources_create_exit;     }       sig_mr_in.pd = res->pd;     sig_mr_in.attr.max_klm_list_size = 1;     sig_mr_in.attr.create_flags = IBV_EXP_MR_SIGNATURE_EN;     sig_mr_in.attr.exp_access_flags = IBV_ACCESS_LOCAL_WRITE |                       IBV_ACCESS_REMOTE_READ |                       IBV_ACCESS_REMOTE_WRITE;     res->sig_mr = ibv_exp_create_mr(&sig_mr_in);     if (!res->sig_mr) {         fprintf(stdout, "failed to create the signature\n");         goto resources_create_exit;     }       /* 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 = 0;     qp_init_attr.send_cq = res->cq;     qp_init_attr.recv_cq = res->cq;     qp_init_attr.cap.max_send_wr = 16;     qp_init_attr.cap.max_recv_wr = 1;     qp_init_attr.cap.max_send_sge = 1;     qp_init_attr.cap.max_recv_sge = 1;       /* signature specific attributes */     qp_init_attr.pd = res->pd;     qp_init_attr.comp_mask = IBV_QP_INIT_ATTR_PD;     qp_init_attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_CREATE_FLAGS;     qp_init_attr.exp_create_flags |= IBV_EXP_QP_CREATE_SIGNATURE_EN;     qp_init_attr.exp_create_flags |= IBV_EXP_QP_CREATE_UMR;     qp_init_attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_MAX_INL_KLMS;     qp_init_attr.max_inl_send_klms = 3;     res->qp = ibv_exp_create_qp(res->ib_ctx, &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->sig_mr) {             ibv_dereg_mr(res->sig_mr);             res->sig_mr = NULL;         }         if (res->pi_mr) {             ibv_dereg_mr(res->pi_mr);             res->pi_mr = NULL;         }         if (res->data_mr) {             ibv_dereg_mr(res->data_mr);             res->data_mr = NULL;         }         if (res->send_mr) {             ibv_dereg_mr(res->send_mr);             res->send_mr = NULL;         }         if (res->recv_mr) {             ibv_dereg_mr(res->recv_mr);             res->recv_mr = NULL;         }         if (res->pi_buf) {             free(res->pi_buf);             res->pi_buf = NULL;         }         if (res->data_buf) {             free(res->data_buf);             res->data_buf = NULL;         }         if (res->send_buf) {             free(res->send_buf);             res->send_buf = NULL;         }         if (res->recv_buf) {             free(res->recv_buf);             res->recv_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_LOCAL_WRITE | 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\n");     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, 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\n");     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\n");     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);     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, 16);     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");         rc = 1;         goto connect_qp_exit;     }     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, 16);     /* save the remote side attributes, we will need it for the post SR */     res->remote_props = remote_con_data;     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) {         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");         goto connect_qp_exit;     }       rc = post_receive(res);     if (rc) {         fprintf(stderr, "failed to post RR\n");         goto connect_qp_exit;     }     /* 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\n");         goto connect_qp_exit;     }     rc = modify_qp_to_rts(res->qp);     if (rc) {         fprintf(stderr, "failed to modify QP state to RTR\n");         goto connect_qp_exit;     }     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 are were moved to RTS\n");         rc = 1;     } connect_qp_exit:     return rc; }   /******************************************************************************  * 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->sig_mr)         if (ibv_dereg_mr(res->sig_mr)) {             fprintf(stderr, "failed to deregister mr\n");             rc = 1;         }     if (res->pi_mr)         if (ibv_dereg_mr(res->pi_mr)) {             fprintf(stderr, "failed to deregister mr\n");             rc = 1;         }     if (res->data_mr)         if (ibv_dereg_mr(res->data_mr)) {             fprintf(stderr, "failed to deregister mr\n");             rc = 1;         }     if (res->send_mr)         if (ibv_dereg_mr(res->send_mr)) {             fprintf(stderr, "failed to deregister mr\n");             rc = 1;         }     if (res->recv_mr)         if (ibv_dereg_mr(res->recv_mr)) {             fprintf(stderr, "failed to deregister mr\n");             rc = 1;         }     if (res->pi_buf)         free(res->pi_buf);     if (res->data_buf)         free(res->data_buf);     if (res->send_buf)         free(res->send_buf);     if (res->recv_buf)         free(res->recv_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; }   int check_sig_mr(struct ibv_mr *mr) {     struct ibv_exp_mr_status status;     int rc;       rc = ibv_exp_check_mr_status(mr, IBV_EXP_MR_CHECK_SIG_STATUS, &status);     if (rc) {         fprintf(stderr, "check mr status failed\n");         return rc;     }       rc = status.fail_status;     fprintf(stdout, "mr status: %s\n",         (rc ? "SIG ERROR" : "OK"));       return rc; }   int send_repl(struct resources *res, uint8_t type, uint32_t status) {     struct msg_t *msg;     int rc;       msg = (struct msg_t *)res->send_buf;     memset(msg, 0, sizeof(*msg));     msg->type = type;     msg->data.rep.status = htonl(status);       rc = post_send(res, IBV_WR_SEND, NULL);     if (rc)         return rc;       rc = poll_completion(res);     if (rc)         return rc;       return rc; }     int handle_read_req(struct resources *res,             const struct msg_t *req) {     int rc = 0;       rc = reg_sig_mr(res, SIG_MODE_STRIP);     if (rc)         goto err_exit;       rc = post_send(res, IBV_WR_RDMA_READ, req);     if (rc)         goto err_exit;       rc = poll_completion(res);     if (rc)         goto err_exit;       rc = check_sig_mr(res->sig_mr);     if (rc)         goto err_exit;       rc = inv_sig_mr(res);     if (rc)         goto err_exit;       rc = post_receive(res);     if (rc)         goto err_exit;       rc = send_repl(res, MSG_TYPE_RDMA_READ_REP, MSG_REP_STATUS_OK); err_exit:     return rc; }   int handle_write_req(struct resources *res,              const struct msg_t *req) {     int rc = 0;       rc = reg_sig_mr(res, SIG_MODE_STRIP);     if (rc)         goto err_exit;       rc = post_send(res, IBV_WR_RDMA_WRITE, req);     if (rc)         goto err_exit;       rc = poll_completion(res);     if (rc)         goto err_exit;       rc = check_sig_mr(res->sig_mr);     if (rc)         goto err_exit;       rc = inv_sig_mr(res);     if (rc)         goto err_exit;       rc = post_receive(res);     if (rc)         goto err_exit;       rc = send_repl(res, MSG_TYPE_RDMA_WRITE_REP, MSG_REP_STATUS_OK); err_exit:     return rc; }   int server(struct resources *res) {     int rc = 0;     int close_conn = 0;     struct msg_t *msg = (struct msg_t *)res->recv_buf;       while (!close_conn) {         rc = poll_completion(res);         if (rc)             break;           switch (msg->type) {         case MSG_TYPE_RDMA_READ_REQ:             rc = handle_read_req(res, msg);             if (rc)                 close_conn = 1;             break;           case MSG_TYPE_RDMA_WRITE_REQ:             rc = handle_write_req(res, msg);             if (rc)                 close_conn = 1;             break;           case MSG_TYPE_CLOSE_CONN:             close_conn = 1;             break;           case MSG_TYPE_RDMA_READ_REP:         case MSG_TYPE_RDMA_WRITE_REP:             fprintf(stderr, "invalid message type 0x%x\n", msg->type);             rc = 1;             close_conn = 1;             break;           default:             fprintf(stderr, "unknown message type 0x%x\n", msg->type);             rc = 1;             close_conn = 1;         }       }   err_exit:     return rc; }     int client(struct resources *res) {     int rc = 0;     struct msg_t *msg;       /* ============ RDMA READ ==========================  */     rc = reg_sig_mr(res, SIG_MODE_INSERT);     if (rc)         goto err_exit;       msg = (struct msg_t *)res->send_buf;     msg->type = MSG_TYPE_RDMA_READ_REQ;     msg->data.req.addr = htonll((uintptr_t)res->sig_mr->addr);     msg->data.req.rkey = htonl(res->sig_mr->rkey);       rc = post_send(res, IBV_WR_SEND, NULL);     if (rc)         goto err_exit;       rc = poll_completion(res);     if (rc)         goto err_exit;       rc = poll_completion(res);     if (rc)         goto err_exit;       msg = (struct msg_t *)res->recv_buf;     if (msg->type != MSG_TYPE_RDMA_READ_REP ||         ntohl(msg->data.rep.status) != MSG_REP_STATUS_OK) {         fprintf(stderr, "invalid message: type 0x%x, status 0x%x\n",             msg->type, ntohl(msg->data.rep.status));         goto err_exit;     }       rc = check_sig_mr(res->sig_mr);     if (rc)         goto err_exit;       rc = inv_sig_mr(res);     if (rc)         goto err_exit;       /* ============ RDMA WRITE ==========================  */       rc = post_receive(res);     if (rc)         goto err_exit;       rc = reg_sig_mr(res, SIG_MODE_CHECK);     if (rc)         goto err_exit;       msg = (struct msg_t *)res->send_buf;     msg->type = MSG_TYPE_RDMA_WRITE_REQ;     msg->data.req.addr = htonll((uintptr_t)res->sig_mr->addr);     msg->data.req.rkey = htonl(res->sig_mr->rkey);       rc = post_send(res, IBV_WR_SEND, NULL);     if (rc)         goto err_exit;       rc = poll_completion(res);     if (rc)         goto err_exit;       rc = poll_completion(res);     if (rc)         goto err_exit;       msg = (struct msg_t *)res->recv_buf;     if (msg->type != MSG_TYPE_RDMA_WRITE_REP ||         ntohl(msg->data.rep.status) != MSG_REP_STATUS_OK) {         fprintf(stderr, "invalid message: type 0x%x, status 0x%x\n",             msg->type, ntohl(msg->data.rep.status));         goto err_exit;     }       rc = check_sig_mr(res->sig_mr);     if (rc)         goto err_exit;       rc = inv_sig_mr(res);     if (rc)         goto err_exit;       /* ============== Send close connection ===================== */       msg = (struct msg_t *)res->send_buf;     msg->type = MSG_TYPE_CLOSE_CONN;     rc = post_send(res, IBV_WR_SEND, NULL);     if (rc)         goto err_exit;       rc = poll_completion(res);     if (rc)         goto err_exit;   err_exit:     return rc; }     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, " 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, " Block size : %u\n", config.block_size);     fprintf(stdout, " Number of blocks : %u\n", config.nb);     fprintf(stdout, " Interleave : %u\n", config.interleave);     fprintf(stdout,         " ------------------------------------------------\n\n"); } /******************************************************************************  * Function: usage  *  * Input  * argv0 command line arguments  *  * Output  * none  *  * Returns  * none  *  * Description  * print a description of command line syntax  ******************************************************************************/   static void usage(const char *argv0) {     fprintf(stdout, "Usage:\n");     fprintf(stdout, " %s start a server and wait for connection\n", argv0);     fprintf(stdout, " %s <host> connect to server at <host>\n", argv0);     fprintf(stdout, "\n");     fprintf(stdout, "Options:\n");     fprintf(stdout,         " -p, --port <port>            listen on/connect to port <port> (default 18515)\n");     fprintf(stdout,         " -d, --ib-dev <dev>           use IB device <dev> (default first device found)\n");     fprintf(stdout,         " -i, --ib-port <port>         use port <port> of IB device (default 1)\n");     fprintf(stdout,         " -g, --gid_idx <git index>    gid index to be used in GRH "         "(default not used)\n");     fprintf(stdout,         " -b, --block-size <size>      size of data block, only 512 and 4096 are supported (default 512)\n");     fprintf(stdout,         " -n, --number-of-blocks <NB>  Number of blocks per RDMA operation (default 8)\n");     fprintf(stdout,         " -o, --interleave             Contiguous data segments and signature blocks logically interleaved using UMR capabilities. (disabled by default)\n"); }   /******************************************************************************  * Function: main  *  * Input  * argc number of items in argv  * argv command line parameters  *  * Output  * none  *  * Returns  * 0 on success, 1 on failure  *  * Description  * Main program code  ******************************************************************************/ int main(int argc, char *argv[]) {     struct resources res;     int rc = 1;     char temp_char;       /* parse the command line parameters */     while (1) {         int c;         static struct option long_options[] = {             { .name = "port",   .has_arg = 1, .val = 'p' },             { .name = "ib-dev", .has_arg = 1, .val = 'd' },             { .name = "ib-port",    .has_arg = 1, .val = 'i' },             { .name = "gid-idx",    .has_arg = 1, .val = 'g' },             { .name = "block-size", .has_arg = 1, .val = 'b' },             { .name = "number-of-blocks", .has_arg = 1, .val = 'n' },             { .name = "interleave", .has_arg = 0, .val = 'o' },             { .name = NULL,     .has_arg = 0, .val = '\0' }         };           c = getopt_long(argc, argv, "p:d:i:g:b:n:o", long_options, NULL);         if (c == -1)             break;         switch (c) {         case 'p':             config.tcp_port = strtoul(optarg, NULL, 0);             break;         case 'd':             config.dev_name = strdup(optarg);             break;         case 'i':             config.ib_port = strtoul(optarg, NULL, 0);             if (config.ib_port < 0) {                 usage(argv[0]);                 return 1;             }             break;         case 'g':             config.gid_idx = strtoul(optarg, NULL, 0);             if (config.gid_idx < 0) {                 usage(argv[0]);                 return 1;             }             break;         case 'b':             config.block_size = strtoul(optarg, NULL, 0);             if (config.block_size != 512 && config.block_size != 4096) {                 usage(argv[0]);                 return 1;             }             break;         case 'n':             config.nb = strtoul(optarg, NULL, 0);             if (config.nb < 1) {                 usage(argv[0]);                 return 1;             }             break;         case 'o':             config.interleave = 1;             break;         default:             usage(argv[0]);             return 1;         }     }       /* parse the last parameter (if exists) as the server name */     if (optind == argc - 1)         config.server_name = argv[optind];     else if (optind < argc) {         usage(argv[0]);         return 1;     }       print_config();       resources_init(&res);       if (resources_create(&res)) {         fprintf(stderr, "failed to create resources\n");         goto main_exit;     }       if (connect_qp(&res)) {         fprintf(stderr, "failed to connect QPs\n");           goto main_exit;     }       if (config.server_name)         rc = client(&res);     else         rc = server(&res);   main_exit:     if (resources_destroy(&res)) {         fprintf(stderr, "failed to destroy resources\n");         rc = 1;     }     if (config.dev_name)         free((char *)config.dev_name);     fprintf(stdout, "\ntest result is %d\n", rc);       return rc; }