static ssize_t ib_ucm_listen(struct ib_ucm_file *file, const char __user *inbuf, int in_len, int out_len) { struct ib_ucm_listen cmd; struct ib_ucm_context *ctx; int result; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ib_ucm_ctx_get(cmd.id); if (!ctx) return -ENOENT; down(&ctx->file->mutex); if (ctx->file != file) result = -EINVAL; else result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); up(&ctx->file->mutex); ib_ucm_ctx_put(ctx); /* func reference */ return result; }
static UCS_CLASS_INIT_FUNC(uct_cm_iface_t, uct_pd_h pd, uct_worker_h worker, const char *dev_name, size_t rx_headroom, const uct_iface_config_t *tl_config) { uct_cm_iface_config_t *config = ucs_derived_of(tl_config, uct_cm_iface_config_t); ucs_status_t status; int ret; ucs_trace_func(""); UCS_CLASS_CALL_SUPER_INIT(uct_ib_iface_t, &uct_cm_iface_ops, pd, worker, dev_name, rx_headroom, 0 /* rx_priv_len */, 0 /* rx_hdr_len */, 1 /* tx_cq_len */, IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE, /* mss */ &config->super); if (worker->async == NULL) { ucs_error("cm must have async!=NULL"); return UCS_ERR_INVALID_PARAM; } self->service_id = (uint32_t)(ucs_generate_uuid((uintptr_t)self) & (~IB_CM_ASSIGN_SERVICE_ID_MASK)); self->num_outstanding = 0; self->config.timeout_ms = (int)(config->timeout * 1e3 + 0.5); self->config.max_outstanding = config->max_outstanding; self->config.retry_count = ucs_min(config->retry_count, UINT8_MAX); self->notify_q.head = NULL; ucs_queue_head_init(&self->notify_q); self->outstanding = ucs_calloc(self->config.max_outstanding, sizeof(*self->outstanding), "cm_outstanding"); if (self->outstanding == NULL) { status = UCS_ERR_NO_MEMORY; goto err; } self->cmdev = ib_cm_open_device(uct_ib_iface_device(&self->super)->ibv_context); if (self->cmdev == NULL) { ucs_error("ib_cm_open_device() failed: %m. Check if ib_ucm.ko module is loaded."); status = UCS_ERR_NO_DEVICE; goto err_free_outstanding; } status = ucs_sys_fcntl_modfl(self->cmdev->fd, O_NONBLOCK, 0); if (status != UCS_OK) { goto err_close_device; } ret = ib_cm_create_id(self->cmdev, &self->listen_id, self); if (ret) { ucs_error("ib_cm_create_id() failed: %m"); status = UCS_ERR_NO_DEVICE; goto err_close_device; } ret = ib_cm_listen(self->listen_id, self->service_id, 0); if (ret) { ucs_error("ib_cm_listen() failed: %m"); status = UCS_ERR_INVALID_ADDR; goto err_destroy_id; } if (config->async_mode == UCS_ASYNC_MODE_SIGNAL) { ucs_warn("ib_cm fd does not support SIGIO"); } status = ucs_async_set_event_handler(config->async_mode, self->cmdev->fd, POLLIN, uct_cm_iface_event_handler, self, worker->async); if (status != UCS_OK) { ucs_error("failed to set event handler"); goto err_destroy_id; } ucs_debug("listening for SIDR service_id 0x%x on fd %d", self->service_id, self->cmdev->fd); return UCS_OK; err_destroy_id: ib_cm_destroy_id(self->listen_id); err_close_device: ib_cm_close_device(self->cmdev); err_free_outstanding: ucs_free(self->outstanding); err: return status; }